First Financial Bankshares (FFIN) S-4/A Registration of securities issued in business combination transactions (amended)

As filed with the Securities and Exchange Commission on October 29, 2019

Registration No. 333 -234254

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Amendment No. 1

to

FormS-4

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

FIRST FINANCIAL BANKSHARES, INC.

(Exact name of registrant as specified in its charter)

Texas	6021	75-0944023
(State or other jurisdiction of incorporation or organization)	(Primary Standard Industrial Classification Code Number)	(I.R.S. Employer Identification No.)

400 Pine Street

Abilene, Texas 79601

(325)627-7155

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

F. Scott Dueser

Chairman of the Board, President and Chief Executive Officer

First Financial Bankshares, Inc.

400 Pine Street

Abilene, Texas 79601

(325)627-7155

(325)627-7393 (Fax)

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

Michael G. Keeley, Esq.	Chet A. Fenimore, Esq.
Norton Rose Fulbright US LLP	Jeremy S. Lemmon, Esq.
2200 Ross Avenue, Suite 3600	Fenimore, Kay, Harrison & Ford, LLP
Dallas, Texas 75201-7932	812 San Antonio Street, Suite 600
(214)855-3906	Austin, Texas 78701
(214)855-8200 (Fax)	(512)583-5901
	(512)583-5940 (Fax)

Approximate date of commencement of proposed sale of the securities to the public: As soon as practicable after this registration statement becomes effective and all other conditions to the proposed merger described herein have been satisfied or waived.

If the securities being registered on this form are being offered in connection with the formation of a holding company and there is compliance with General Instruction G, check the following box:  ☐

If this form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering:  ☐

If this form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering:  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, anon-accelerated filer, a smaller reporting company, or emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “ emerging growth company” in Rule12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.  ☐

If applicable, place an X in the box to designate the appropriate rule provision relied upon in conducting this transaction:

Exchange Act Rule13e-4(i) (Cross-Border Issuer Tender Offer)  ☐

Exchange Act Rule14d-1(d) (Cross-Border Third-Party Tender Offer)  ☐

The registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the registration statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.

The information in this proxy statement/prospectus is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This proxy statement/prospectus is not an offer to sell these securities, and it is not soliciting to buy these securities, in any state where the offer or sale is not permitted.

PRELIMINARY—SUBJECT TO COMPLETION, DATED OCTOBER 29, 2019

PROXY STATEMENT/PROSPECTUS

TB&T BANCSHARES, INC.

PROPOSED MERGER—YOUR VOTE IS VERY IMPORTANT

Dear Shareholder:

You are cordially invited to attend the special meeting of shareholders of TB&T Bancshares, Inc., which we refer to as “TB&T,” to be held on December 3, 2019 at 3:00 p.m., local time, at the Phillips Event Center, 1929 Country Club Drive, Bryan, Texas 77802. At this special meeting, you will be asked to approve the Agreement and Plan of Reorganization, which we refer to as the “reorganization agreement,” dated September 19, 2019, by and among First Financial Bankshares, Inc., which we refer to as “First Financial,” Brazos Merger Sub, Inc., a wholly owned subsidiary of First Financial, which we refer to as “Merger Sub,” and TB&T, which provides for the acquisition of TB&T by First Financial. The acquisition of TB&T by First Financial will be completed pursuant to the terms and conditions of the reorganization agreement by means of a merger of Merger Sub with and into TB&T, which we refer to as the “merger,” with TB&T surviving as a wholly owned subsidiary of First Financial. Thereafter, First Financial will cause TB&T to merge with and into First Financial, with First Financial surviving the merger, which together with the merger we refer to as the “integrated mergers,” and subsequently, at such later time as First Financial may determine, First Financial will cause The Bank & Trust of Bryan/College Station to merge with and into First Financial Bank, N.A., with First Financial Bank, N.A. as the surviving bank.

If the merger is completed, all outstanding shares of TB&T common stock, other than cancelled shares and dissenting shares, will be converted, pursuant to the reorganization agreement, into the right to receive 1.2502 shares of First Financial common stock. In addition, in connection with the closing of the merger, TB&T may pay a special dividend, referred to as the “special dividend,” to its shareholders of up to $2.0 million in the aggregate on or prior to the closing of the merger. For illustration purposes only, based on the number of shares of First Financial common stock issued and outstanding as of October 29, 2019, the aggregate number of shares of First Financial common stock to be received by TB&T shareholders pursuant to the terms of the reorganization agreement would have provided TB&T shareholders with aggregate ownership of approximately 4.4% of the issued and outstanding shares of First Financial common stock after completion of the merger. The market value of the stock consideration will fluctuate with the market price of First Financial common stock and will not be known at the time TB&T shareholders vote on the reorganization agreement and the merger. First Financial common stock is listed on the NASDAQ Global Select Market under the symbol “FFIN.” On September 19, 2019, the last full trading day before the public announcement of the reorganization agreement, the last reported sale price of First Financial common stock was $33.11 per share, and on October 25, 2019, the latest practicable full trading day before the printing of this proxy statement/prospectus, the last reported sale price of First Financial common stock was $34.82 per share.We urge you to obtain current market quotations for First Financial’s common stock. There are no current market quotations for TB&T common stock because TB&T is a privately owned corporation and its common stock is not traded on any established public trading market.

The board of directors of TB&T has determined that the reorganization agreement and the transactions contemplated therein, including the merger, are fair to and in the best interests of TB&T and its shareholders, and approved and declared advisable the reorganization agreement and the transactions contemplated therein, including the merger.The TB&T board of directors recommends that you vote “FOR” the proposal to approve the reorganization agreement.

First Financial and TB&T intend that the merger will qualify for U.S. federal income tax purposes as a reorganization within the meaning of Section 368(a) of the Internal Revenue Code of 1986, as amended, which we refer to as the “Code.” If the merger qualifies as a reorganization under Section 368(a) of the Code, a U.S. holder (as defined in this proxy statement/prospectus) of TB&T common stock who exchanges TB&T common stock for First Financial common stock and receives payment of the special dividend in cash, if any, should recognize gain (but not loss) in the exchange equal to the lesser of the cash received by such holder and the amount, if any, by which the cash plus the fair market value of First Financial common stock received by such holder exceeds the tax basis of such holder’s TB&T common stock surrendered in exchange therefor (in each case excluding cash received in lieu of a fractional share of First Financial common stock). Further, a U.S. holder of TB&T common stock generally will recognize gain or loss with respect to cash received in lieu of fractional shares of First Financial common stock that the U.S. holder would otherwise be entitled to receive.

Your vote is very important. Whether or not you plan to attend the special meeting, please take the time to vote by completing and mailing the enclosed proxy card to TB&T. Submitting a proxy now will not prevent you from being able to vote in person at the special meeting. If you sign, date and mail your proxy card without indicating your vote, your proxy will be counted as a vote “FOR” the proposal to adopt and approve the reorganization agreement and the transactions contemplated thereby. If you do not return your proxy card, abstain from voting or do not instruct your brokerage firm, bank, trust or other nominee how to vote any shares held for you in “street name,” the effect will be a vote “AGAINST” such proposal.

This proxy statement/prospectus contains a more complete description of the special meeting, the reorganization agreement and the transactions contemplated therein, including the merger.Please carefully read this entire proxy statement/prospectus, including the “Risk Factors,” beginning on page17, for a discussion of the risks relating to the proposed merger and an investment in First Financial common stock. You may also obtain information about First Financial from documents that First Financial has filed with the Securities and Exchange Commission, which we refer to as the “SEC.”

We thank you for your continued support and look forward to seeing you at the special meeting.

Sincerely,

Timothy N. Bryan

Chairman and Chief Executive Officer

TB&T Bancshares, Inc.

Neither the SEC nor any state securities commission has approved or disapproved of the securities to be issued in connection with the merger or passed upon the adequacy or accuracy of this proxy statement/prospectus. Any representation to the contrary is a criminal offense.

The securities that First Financial is offering through this document are not savings or deposit accounts or other obligations of any bank ornon-bank subsidiary of either of First Financial or TB&T, and they are not insured by the Federal Deposit Insurance Corporation or any other governmental agency.

The date of this proxy statement/prospectus is October 29, 2019 and it is first being mailed to shareholders of TB&T on or about November 1, 2019.

TB&T BANCSHARES, INC.

1716 Briarcrest Drive, Suite 400

Bryan, Texas 77802

(979)260-2100

NOTICE OF SPECIAL MEETING OF SHAREHOLDERS

NOTICE IS HEREBY GIVEN that a special meeting of the shareholders of TB&T Bancshares, Inc., or TB&T, will be held on December 3, 2019, at 3:00 p.m., local time, at the Phillips Event Center, 1929 Country Club Drive, Bryan, Texas 77802, for the following purposes:

1. to approve the Agreement and Plan of Reorganization, dated September 19, 2019, by and among First Financial Bankshares, Inc., or First Financial, Brazos Merger Sub, Inc., a wholly owned subsidiary of First Financial referred to as Merger Sub, and TB&T, pursuant to which Merger Sub will merge with and into TB&T, which we refer to as the merger, with TB&T surviving the merger as a wholly owned subsidiary of First Financial, on and subject to the terms and conditions contained therein (which proposal we refer to as the “merger proposal”); and

2. to approve one or more adjournments of the special meeting to a later date or dates, if the board of directors of TB&T determines such an adjournment is necessary to permit further solicitation of additional proxies (which proposal we refer to as the “adjournment proposal”).

Only shareholders of record at the close of business on October 28, 2019 will be entitled to notice of and to vote at the special meeting and any adjournments or postponements thereof. Approval of the merger proposal requires the affirmative vote of the holders of at leasttwo-thirds of the outstanding shares of TB&T common stock entitled to vote. The adjournment proposal requires the affirmative vote of a majority of the shares of TB&T common stock present, in person or by proxy, for approval. The special meeting may be adjourned or postponed from time to time upon approval of adjournment proposal by TB&T’s shareholders without any notice other than by announcement at the meeting of the adjournment or postponement thereof, and any and all business for which notice is hereby given may be transacted at such adjourned or postponed meeting.

Shareholders of TB&T have the right to dissent from the merger and obtain payment in cash of the appraised fair value of their shares of TB&T common stock under applicable provisions of the Texas Business Organizations Code. In order for a shareholder of TB&T to perfect its right to dissent, such shareholder must file a written objection to the merger prior to the special meeting, must vote against the merger proposal and must file a written demand with First Financial within 20 days after the consummation of the merger for payment of the fair value of the shareholder’s shares of TB&T common stock. A copy of the applicable statutory provisions of the Texas Business Organizations Code is included asAppendix Eto the accompanying proxy statement/prospectus and a summary of these provisions can be found under the caption “Proposal 1: Merger Proposal—Dissenters’ Rights of TB&T Shareholders.”

The board of directors of TB&T unanimously recommends that you vote (i) “FOR” the merger proposal and (ii) “FOR” the adjournment proposal.

Your Vote is Very Important.A proxy card is enclosed. Whether or not you plan to attend the special meeting, please complete, sign and date the proxy card and promptly mail it in the enclosed envelope. You may revoke your proxy card in the manner described in the proxy statement/prospectus at any time before the special meeting is called to order. If you attend the special meeting, you may vote in person if you wish, even if you have previously returned your proxy card.

This proxy statement/prospectus provides a detailed description of the TB&T special meeting, the merger proposal, and the adjournment proposal, the documents related to the merger and other related matters. You are

urged to read this proxy statement/prospectus, including any documents they refer you to, and its appendices carefully and in their entirety. We look forward with pleasure to seeing and visiting with you at the special meeting.

By Order of the Board of Directors,

Timothy N. Bryan

Chairman and Chief Executive Officer

TB&T Bancshares, Inc.

Bryan, Texas

October 29, 2019

HOW TO OBTAIN ADDITIONAL INFORMATION

This proxy statement/prospectus incorporates important business and financial information about First Financial from documents filed with the SEC that have not been included in or delivered with this document. This information is described on page 78 under “Where You Can Find More Information.” This information is available to you without charge upon your written or oral request. You can obtain the documents incorporated by reference in this document through the SEC website at http://www.sec.gov or by requesting them in writing, bye-mail or by telephone at the appropriate address below:

First Financial Bankshares, Inc.

400 Pine Street

Abilene, Texas 79601

Attention: Investor Relations

Telephone(325) 627-7155

To obtain timely delivery of the documents before the special meeting of TB&T, you must request the information by November 25, 2019.

PLEASE NOTE

We have not authorized anyone to provide you with any information other than the information included in this document and the documents to which we refer you. If someone provides you with other information, please do not rely on it as being authorized by us.

This proxy statement/prospectus has been prepared as of October 29, 2019. There may be changes in the affairs of TB&T or First Financial since that date, which are not reflected in this document.

TABLE OF CONTENTS

	Page
QUESTIONS AND ANSWERS ABOUT THE MERGER AND THE SPECIAL MEETING		1
SUMMARY		6
The Companies		6
Proposed Merger of TB&T		7
Terms of the Merger (page 27)		7
Certain Material U. S. Federal Income Tax Consequences of the Integrated Mergers (page 55)		7
Opinion of Financial Advisor of TB&T (page 33)		8
First Financial’s Dividend Policy		8
Ownership of First Financial After the Merger		8
Market Prices of First Financial Common Stock (page 74)		8
The TB&T Special Shareholders’ Meeting (page 23)		9
Record Date Set at October 28, 2019; Approval of at LeastTwo-Thirds of Outstanding Shares Required to Approve the Reorganization Agreement (page 23)		9
TB&T’s Reasons for the Merger and Recommendations of TB&T’s Board (page 31)		9
Directors and Certain Officers of TB&T are Subject to a Voting Agreement (page 24)		9
Director Support Agreements (page 53)		10
Effective Time of the Merger (page 41)		10
Conversion; Exchange of TB&T Stock Certificates (page 41)		10
Conditions to Completion of the Merger (page 50)		10
Regulatory Approvals Required (page 60)		11
Amendments or Waiver (page 53)		11
Termination of the Reorganization Agreement (page 54)		11
Some of the Directors and Officers of TB&T Have Financial Interests in the Merger that Differ from Your Interests (page 52)		13
Comparison of Rights of Shareholders of First Financial and TB&T (page 64)		13
Dissenters’ Rights of Appraisal in the Merger (page 61)		13
SELECTED HISTORICAL FINANCIAL DATA OF FIRST FINANCIAL		15
RISK FACTORS		17
A WARNING ABOUT FORWARD-LOOKING STATEMENTS		21
GENERAL INFORMATION		23
TB&T SPECIAL SHAREHOLDERS’ MEETING		23
Date, Place and Time of the Special Meeting		23
Purpose		23
Record Date; Shares Entitle to Vote		23
Quorum; Vote Required		23
Shares Held by Directors and Named Executive Officers		24
Voting and Revocation of Proxies		24
Shares Held in Street Name		25
Solicitation of Proxies; Expenses		25
Recommendation of TB&T’s Board of Directors		25
Dissenters’ Rights		26
PROPOSAL 1: APPROVAL OF THE MERGER PROPOSAL		27
Terms of the Merger		27
Background of the Merger		28
Recommendation of TB&T’s Board of Directors and its Reasons for the Merger		31
Opinion of TB&T’s Financial Advisor		33
First Financial’s Reasons for the Merger		40

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	Page
Effective Time of the Merger		41
Conversion; Exchange of TB&T Stock Certificates		41
Representations and Warranties of TB&T and First Financial		42
Covenants and Agreements		45
Conditions to Completion of the Merger		50
Interests of TB&T’s Directors and Officers in the Merger		52
Director Support Agreements		53
NASDAQ Listing		53
Amendment or Waiver of the Reorganization Agreement		53
Termination of the Reorganization Agreement		54
Expenses		55
Certain Material U.S. Federal Income Tax Consequences of the Merger		55
Accounting Treatment		59
Restrictions on Resales of First Financial Common Stock Received in the Merger		60
Regulatory Approvals Required for the Merger		60
Dissenters’ Rights of TB&T Shareholders		61
PROPOSAL 2: ADJOURNMENT OF THE SPECIAL MEETING		63
COMPARISON OF RIGHTS OF SHAREHOLDERS OF TB&T AND FIRST FINANCIAL		64
TEXAS ANTI-TAKEOVER STATUTES		70
BUSINESS OF TB&T BANCSHARES, INC.		71
General		71
Products and Services		71
Market Area		71
Competition		72
Employees		72
Legal Proceedings		72
BENEFICIAL OWNERSHIP OF TB&T COMMON STOCK BY MANAGEMENT AND PRINCIPAL SHAREHOLDERS OF TB&T		73
COMPARATIVE MARKET PRICES AND DIVIDEND DATA		74
First Financial		74
TB&T		75
DESCRIPTION OF FIRST FINANCIAL CAPITAL STOCK		77
General		77
First Financial common stock		77
EXPERTS		77
LEGAL MATTERS		77
OTHER MATTERS		77
WHERE YOU CAN FIND MORE INFORMATION		78
Appendix A—Agreement and Plan of Reorganization
Appendix B—Form of TB&T Voting Agreement
Appendix C—Form of TB&T Director Support Agreement
Appendix D—Opinion of Stephens Inc.
Appendix  E—Provisions of the Texas Business Organizations Code Relating to Dissenters’ Rights

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QUESTIONS AND ANSWERS ABOUT THE MERGER AND THE SPECIAL MEETING

Q: What are the TB&T Bancshares, Inc., or TB&T, shareholders being asked to vote upon?

A: The shareholders of TB&T are being asked to consider and vote on the following matters:

1. to approve the Agreement and Plan of Reorganization, dated September 19, 2019, by and among First Financial Bankshares, Inc., or First Financial, Brazos Merger Sub, Inc., a wholly owned subsidiary of First Financial referred to as Merger Sub, and TB&T, pursuant to which Merger Sub will merge with and into TB&T, which we refer to as the “merger,” with TB&T surviving the merger as a wholly owned subsidiary of First Financial, on and subject to the terms and conditions contained therein (which proposal we refer to as the “merger proposal”); and

2. to approve one or more adjournments of the special meeting to a later date or dates, if the board of directors of TB&T determines such an adjournment is necessary to permit further solicitation of additional proxies (which proposal we refer to as the “adjournment proposal”).

As of the date of this proxy statement/prospectus, TB&T’s board of directors is not aware of any matters, other than those stated above, that may be brought before the special meeting.

Q: What will happen in the merger?

A: In the merger, Merger Sub will merge with and into TB&T, with TB&T surviving the merger as a wholly owned subsidiary of First Financial. Following the merger, First Financial will cause (i) TB&T to merge with and into First Financial, with First Financial as the surviving entity and TB&T ceasing its separate corporate existence, referred to as the “second step merger” and collectively with the merger, the “integrated mergers,” and (ii) following the second step merger, at such later time as First Financial may determine, First Financial will cause The Bank & Trust of Bryan/College Station, referred to as “The Bank & Trust,” to merge with and into First Financial Bank, N.A., referred to as “First Financial Bank,” with First Financial Bank as the surviving bank and The Bank & Trust ceasing its separate corporate existence, which merger is referred to as the “bank merger.” As a result of the bank merger, the existing main office and branches of The Bank & Trust will become branches of First Financial Bank.

Q: Why am I receiving this proxy statement/prospectus?

A. TB&T is sending these materials to its shareholders to help them decide how to vote their shares of TB&T common stock with respect to the merger proposal and other matters to be considered at the special meeting.

The merger cannot be completed unless TB&T common shareholders approve the merger proposal. TB&T is holding a special meeting of its shareholders to vote on the proposal to approve the merger proposal as well as other related matters. Information about this special meeting, the merger and the other business to be considered by shareholders at the special meeting is contained in this document.

This document constitutes both a proxy statement of TB&T and a prospectus of First Financial. It is a proxy statement because the TB&T board of directors is soliciting proxies from TB&T common shareholders using this document with respect to the matters to be considered at the special meeting. It is a prospectus because First Financial, in connection with the merger, is offering shares of its common stock in exchange for outstanding shares of TB&T common stock in the merger.

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Q: What form of consideration will TB&T shareholders receive as a result of the merger?

A: If the merger is completed, each outstanding share of TB&T common stock, other than cancelled shares and dissenting shares, will be converted, pursuant to the reorganization agreement, into the right to receive 1.2502 shares of First Financial common stock.

For illustration purposes only, based on the number of shares of First Financial common stock issued and outstanding as of October 29, 2019, the aggregate number of shares of First Financial common stock to be received by TB&T shareholders pursuant to the terms of the reorganization agreement would have provided TB&T shareholders with aggregate ownership of approximately 4.4% of the issued and outstanding shares of First Financial common stock after completion of the merger.

In connection with the closing of the merger, TB&T may pay a special dividend, referred to as the “special dividend,” to its shareholders of up to $2.0 million in the aggregate. In the event that merger is not completed prior to the record date for determining the shareholders of First Financial who are entitled to receive any regular cash dividend on First Financial common stock for the first quarter of 2020, then TB&T shareholders will be entitled to receive an additional aggregate cash amount equal to (a) the per share cash dividend on First Financial common stock declared by the First Financial board of directors with the previously mentioned record date multiplied by (b) 6,275,806 (which is the approximate number of shares of First Financial common stock to be tendered as consideration for the merger). In each case, any dividend payable by TB&T would be paid prior to the closing of the merger.

Q: Will the value of the merger consideration change between the date of this proxy statement/prospectus and the time the merger is completed?

A: Yes. The value of the merger consideration may fluctuate between the date of this proxy statement/prospectus and the completion of the merger. The value of the stock consideration may fluctuate based upon the market value for First Financial common stock. First Financial common stock is listed on the NASDAQ Global Select Market under the symbol “FFIN.” In the merger, TB&T shareholders will receive 1.2502 shares of First Financial common stock for each share of TB&T common stock they hold. Any fluctuation in the market price of First Financial common stock after the date of this proxy statement/prospectus will change the value of the shares of First Financial common stock that TB&T shareholders will receive. On September 19, 2019, the last full trading day before the public announcement of the reorganization agreement, the last reported sale price of First Financial common stock was $33.11 per share, and on October 25, 2019, the latest practicable full trading date prior to the printing of this proxy statement/prospectus, the last reported sale price of First Financial common stock was $34.82 per share.

You should read this proxy statement/prospectus carefully to understand the value of the consideration you will receive in the merger. For additional explanation of the merger consideration, please see “Proposal 1 : Approval of the Merger Proposal—Terms of the Merger,” beginning on page 27.

Q: What are the material U.S. federal income tax consequences of the merger to TB&T shareholders?

A: It is a condition to TB&T’s and First Financial’s obligation to complete the integrated mergers that each receive a written opinion from its counsel to the effect that, on the basis of facts, representations and assumptions set forth or referred to in such opinions, for U.S. federal income tax purposes, the integrated mergers will together be treated as an integrated transaction that qualifies as a “reorganization” within the meaning of Section 368(a) of the Internal Revenue Code of 1986, as amended (the “Code”). Neither TB&T nor First Financial intend to seek a ruling from the Internal Revenue Service (the “IRS”) as to the qualification of the integrated mergers as reorganization under Section 368(a) of the Code and neither counsel’s opinion is binding on the IRS.

Assuming the integrated mergers taken together qualify as a reorganization, a U.S. holder (as defined in the section entitled “Proposal 1: Approval of the Merger—Certain Material U.S. Federal Income Tax

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Consequences of the Integrated Merger” beginning on page55) of shares of TB&T common stock who exchanges TB&T common stock for First Financial common stock and receives payment of the special dividend in cash, if any, should recognize gain (but not loss) in the exchange equal to the lesser of: (i) the special dividend received by such holder and (ii) the amount, if any, by which the special dividend plus the fair market value of First Financial common stock received by such holder exceeds the tax basis of such holder’s TB&T common stock surrendered in exchange therefor (in each case excluding cash received in lieu of a fractional share of First Financial common stock). Further, a U.S. holder of TB&T common stock generally will recognize gain or loss with respect to cash received in lieu of fractional shares of First Financial common stock that the U.S. holder would otherwise be entitled to receive.

FOR FURTHER INFORMATION, PLEASE SEE “PROPOSAL 1: APPROVAL OF THE MERGER—CERTAIN MATERIAL U.S. FEDERAL INCOME TAX CONSEQUENCES OF THE INTEGRATED MERGERS” BEGINNING ON PAGE 55. THE U.S. FEDERAL INCOME TAX CONSEQUENCES DESCRIBED ABOVE MAY NOT APPLY TO ALL U.S. HOLDERS OF TB&T COMMON STOCK. YOUR TAX CONSEQUENCES WILL DEPEND ON YOUR INDIVIDUAL SITUATION. ACCORDINGLY, TB&T AND FIRST FINANCIAL STRONGLY URGE YOU TO CONSULT YOUR TAX ADVISOR FOR A FULL UNDERSTANDING OF THE PARTICULAR TAX CONSEQUENCES OF THE INTEGRATED MERGERS TO YOU.

Q: When do you expect the merger to be completed?

A: We are working to complete the merger during the first quarter of 2020, although delays could occur.

Q: When and where will TB&T special shareholders’ meeting be held?

A: The TB&T specialshareholders’ meeting is scheduled to take place at 3:00 p.m., local time, on December 3, 2019 at the Phillips Event Center, 1929 Country Club Drive, Bryan, Texas 77802.

Q: What are my choices when voting?

A: With respect to each of the proposals, you may vote for the proposal, against the proposal or abstain from voting on the proposal. An abstention will count as a vote against approval of the merger proposal.

Q: Who is entitled to vote at the TB&T special shareholders’ meeting?

A: All holders of TB&T common stock who held shares at the close of business on October 28, 2019, which we refer to as the “record date,” are entitled to receive notice of and to vote at the TB&T specialshareholders’ meeting.

Q: What votes are required for approval of the reorganization agreement?

A: Approval by TB&T shareholders of the merger proposal requires the affirmative vote of the holders of at leasttwo-thirds of the shares of TB&T common stock outstanding as of the record date.

Q: What votes are required to adjourn or postpone the special meeting?

A: To adjourn or postpone the special meeting, the affirmative vote of a majority of the shares of TB&T common stock present, in person or by proxy, at the meeting is required.

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Q: How does the board of directors of TB&T recommend that I vote?

A: The board of directors of TB&T unanimously recommends that the shareholders vote their shares as follows:

Proposal 1—“FOR” the merger proposal; and

Proposal 2—“FOR” the adjournment proposal.

Q: What happens if I transfer my shares after the record date for the special meeting?

A: The record date for the special meeting is earlier than the expected date of completion of the merger. Therefore, if you transfer your shares of TB&T common stock after the record date, but prior to the completion of the merger, you will retain the right to vote at the special meeting, but the right to receive the merger consideration will transfer with your shares of TB&T common stock.

Q: What do I need to do now?

A: After you have thoroughly read and considered the information contained in this proxy statement/prospectus, indicate on the proxy card applicable to your TB&T common stock your vote and sign, date and mail your proxy card(s) in the enclosedpre-addressed postage-paid envelope as soon as possible so that your shares of TB&T common stock may be represented at the special meeting.

Q: What happens if I don’t return a proxy card for the special meeting?

A: Because approval of the merger proposal requires the affirmative approval of the holders of at leasttwo-thirds of the outstanding shares of TB&T common stock, the failure to return your proxy card will have the same effect as a vote against the merger proposal, unless you attend the special meeting in person and vote for approval of the merger proposal.

Q: May I vote in person?

A: Yes. Even if you have previously completed and returned your proxy card, you may vote your shares in person by attending the special meeting, revoking your previously submitted proxy prior to the start of the special meeting and voting your shares in person.

Q: May I change my vote after I have submitted my proxy card?

A: Yes. You may change your vote at any time before the special meeting is called to order by attending the special meeting, revoking your proxy and voting your shares in person or by submitting a new proxy card. If you choose to revoke your proxy and submit a new proxy card, TB&T must have received the subsequent proxy card no later than December 2, 2019, at 5:00 p.m. local time, which is the business day immediately prior to the special meeting.

Q: If my shares are held in “street name” by my brokerage firm, bank, trust or other nominee, will my brokerage firm, bank, trust or other nominee vote my shares for me?

A: Your brokerage firm, bank, trust or other nominee will vote your shares only if you provide instructions on how to vote. You should instruct your brokerage firm, bank, trust or other nominee how to vote your shares, following the directions your brokerage firm, bank, trust or other nominee provides. If you do not provide instructions to your brokerage firm, bank, trust or other nominee, your shares will not be voted, which will have the same effect as a vote against the merger proposal.

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Q: Do I have any rights to dissent from the merger pursuant to the reorganization agreement?

A: You have the right to vote against approval of the merger pursuant to the reorganization agreement, dissent from the merger and seek payment of the appraised fair value of your shares in cash as described in“Proposal 1: Approval of the Merger Proposal—Dissenters’ Rights of TB&T Shareholders” beginning on page61. The appraised fair value of your shares of TB&T common stock may be more or less than the value of the First Financial common stock to be paid pursuant to the terms of the reorganization agreement.

Q: Should I send in my stock certificates now?

A: No. After the merger is completed, the exchange agent will send you written instructions for exchanging your stock certificates. You should not send your TB&T stock certificates with your proxy card.

Q: Who can help answer my questions?

A: If you have additional questions about the merger, you should contact Jerry E. Fox, TB&T Bancshares, Inc., 1716 Briarcrest Drive, Suite 400, Bryan, Texas 77802, telephone (979)260-2106.

Q: Are there any risks I should consider in deciding whether I vote for the reorganization agreement?

A: Yes. A number of risk factors that you should consider carefully are set forth under the heading of “Risk Factors,” beginning on page 17.

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SUMMARY

This brief summary highlights selected information from this proxy statement/prospectus and may not contain all of the information that is important to you. We urge you to carefully read this entire document and the other documents we refer to in this document. These documents will give you a more complete description of the transaction we are proposing. For more information about First Financial, see “Where You Can Find More Information” on page78. We have included page references in this summary to direct you to other places in this proxy statement/prospectus where you can find a more complete description of the topics we have summarized.

The Companies

First Financial Bankshares, Inc.

400 Pine Street

Abilene, Texas 79601

(325)627-7155

First Financial is a Texas corporation and a financial holding company registered under the Bank Holding Company Act of 1956, as amended, referred to in this proxy statement/prospectus as the “BHC Act.” First Financial owns all of the issued and outstanding shares of common stock of First Financial Bank. As of September 30, 2019, on a consolidated basis, First Financial had total assets of approximately $8.1 billion, total net loans of approximately $4.1 billion, total deposits of approximately $6.4 billion and shareholders’ equity of approximately $1.2 billion.

First Financial Bank is a national banking association chartered and regulated by the Office of the Comptroller of the Currency (the “OCC”) and its deposits are insured by the Federal Deposit Insurance Corporation (the “FDIC”). First Financial Bank conducts a complete range of commercial and personal banking activities. As of September 30, 2019, First Financial Bank had 73 financial centers across Texas, with eleven locations in Abilene, three locations in San Angelo and Weatherford, two locations in Cleburne, Conroe, Stephenville and Granbury, and one location each in Acton, Albany, Aledo, Alvarado, Beaumont, Boyd, Bridgeport, Brock, Burleson, Cisco, Clyde, Cut and Shoot, Decatur, Eastland, El Campo, Fort Worth, Fulshear, Glen Rose, Grapevine, Hereford, Huntsville, Keller, Kingwood, Magnolia, Mauriceville, Merkel, Midlothian, Mineral Wells, Montgomery, Moran, New Waverly, Newton, Odessa, Orange, Palacios, Port Arthur, Ranger, Rising Star, Roby, Southlake, Sweetwater, Tomball, Trent, Trophy Club, Vidor, Waxahachie, Willis and Willow Park, all in Texas. Our trust subsidiary has eight locations which are located in Abilene, Fort Worth, Houston, Odessa, Beaumont, San Angelo, Stephenville and Sweetwater.

TB&T Bancshares, Inc.

1716 Briarcrest Drive, Suite 400

Bryan, Texas 77802

(979)260-2100

TB&T is a Texas corporation and a bank holding company registered under the BHC Act. TB&T owns all of the issued and outstanding shares of common stock of The Bank & Trust of Bryan/College Station (“The Bank & Trust”). The Bank & Trust is a Texas statenon-member bank headquartered in Bryan, Texas, and its deposits are insured by the FDIC. The Bank & Trust conducts a complete range of commercial and personal banking activities through five full servicing banking offices located in Brazos County, Texas. As of September 30, 2019, TB&T, on a consolidated basis, had total assets of $630.2 million, total net loans of $436.2 million, total deposits of $552.8 million and total shareholders’ equity of $76.1 million.

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Proposed Merger

The reorganization agreement is the legal document that governs the merger. We have attached the reorganization agreement to this document asAppendix A. Please read the entire reorganization agreement.

Terms of the Merger (page 27)

The reorganization agreement provides for the acquisition of TB&T and its wholly owned subsidiary, The Bank & Trust, by First Financial. Subject to the receipt of various governmental and third party approvals and the satisfaction of the conditions set forth in the reorganization agreement, we anticipate that the transactions contemplated by the reorganization agreement will be completed in the first quarter of 2020, although delays could occur.

If the merger is completed, each outstanding share of TB&T common stock, other than cancelled shares and dissenting shares, will be converted, pursuant to the reorganization agreement, into the right to receive 1.2502 shares of First Financial common stock. Any fluctuation in the market price of First Financial common stock after the date of this proxy statement/prospectus will change the value of the shares of First Financial common stock that TB&T shareholders will receive. On September 19, 2019, the last full trading day before the public announcement of the reorganization agreement, the last reported sale price of First Financial common stock was $33.11 per share, and on October 25, 2019, the latest practicable full trading day before the printing of this proxy statement/prospectus, the last reported sale price of First Financial common stock was $34.82 per share. For illustration purposes only, based on the number of shares of First Financial common stock issued and outstanding as of October 29, 2019, the aggregate number of shares of First Financial common stock to be received by TB&T shareholders pursuant to the terms of the reorganization agreement would have provided TB&T shareholders with aggregate ownership of approximately 4.4% of the issued and outstanding shares of First Financial common stock after completion of the merger.

In connection with the closing of the merger, TB&T may pay a special dividend to its shareholders of up to $2.0 million in the aggregate. In the event that merger is not completed prior to the record date for determining the shareholders of First Financial who are entitled to receive any regular cash dividend on First Financial common stock for the first quarter of 2020, then TB&T shareholders will be entitled to receive an additional aggregate cash amount equal to (a) the per share cash dividend on First Financial common stock declared by the First Financial board of directors with the previously mentioned record date multiplied by (b) 6,275,806 (which is the approximate number of shares of First Financial common stock to be tendered as consideration for the merger). In each case, any dividend payable by TB&T would be paid prior to the closing of the merger.

You should read this proxy statement/prospectus carefully to understand the value of the consideration you will receive in the merger. For additional explanation of the merger consideration, please see “Proposal 1: Approval of the Merger Proposal—Terms of the Merger,” beginning on page 27.

Certain Material U.S. Federal Income Tax Consequences of the Integrated Mergers (page 55)

It is a condition to TB&T’s and First Financial’s obligation to complete the integrated mergers that each receive a written opinion from its counsel to the effect that, on the basis of facts, representations and assumptions set forth or referred to in such opinions, for U.S. federal income tax purposes, the integrated mergers will together be treated as an integrated transaction that qualifies as a “reorganization” within the meaning of Section 368(a) of the Code.

Assuming the integrated mergers taken together qualify as a “reorganization,” a U.S. holder of shares of TB&T common stock generally will recognize any gain (but not loss) upon receipt of First Financial common stock and the special dividend in exchange for such holder’s TB&T common stock in the integrated mergers, equal to the lesser of: (i) the amount of the special dividend received by such holder and the amount, if any, by

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which the such special dividend plus the fair market value of First Financial common stock received by such holder exceeds the tax basis of such holder’s TB&T common stock surrendered in exchange therefor (in each case excluding cash received in lieu of a fractional share of First Financial common stock). Further, a U.S. holder of TB&T common stock generally will recognize gain or loss with respect to cash received in lieu of fractional shares of First Financial common stock that the U.S. holder would otherwise be entitled to receive. The U.S. federal income tax consequences of the merger are discussed in more detail in the section entitled “Proposal 1: Approval of the Merger—Certain Material U.S. Federal Income Tax Consequences of the Integrated Mergers” beginning on page55.

FOR FURTHER INFORMATION, PLEASE SEE “PROPOSAL 1: APPROVAL OF THE MERGER—CERTAIN MATERIAL U.S. FEDERAL INCOME TAX CONSEQUENCES OF THE INTEGRATED MERGERS” BEGINNING ON PAGE 55. THE U.S. FEDERAL INCOME TAX CONSEQUENCES DESCRIBED ABOVE MAY NOT APPLY TO ALL U.S. HOLDERS OF TB&T COMMON STOCK. YOUR TAX CONSEQUENCES WILL DEPEND ON YOUR INDIVIDUAL SITUATION. ACCORDINGLY, TB&T AND FIRST FINANCIAL STRONGLY URGE YOU TO CONSULT YOUR TAX ADVISOR FOR A FULL UNDERSTANDING OF THE PARTICULAR TAX CONSEQUENCES OF THE INTEGRATED MERGERS TO YOU.

Opinion of Financial Advisor of TB&T (page 33)

Stephens Inc., which we refer to as “Stephens,” has delivered a written opinion to the board of directors of TB&T that, as of September 18, 2019, based upon and subject to certain matters stated in the opinion, the merger consideration is fair to TB&T from a financial point of view. We have attached this opinion to this proxy statement/prospectus asAppendix D. The opinion of Stephens is not a recommendation to any TB&T shareholder as to how to vote on the proposal to approve the merger proposal. You should carefully read this opinion in its entirety to understand the procedures followed, matters considered and limitations on the reviews undertaken by Stephens in providing its opinion.

First Financial’s Dividend Policy

First Financial generally expects to pay cash dividends to its shareholders of approximately 40% of annual net earnings while maintaining adequate capital to support growth. The cash dividend payout ratios have amounted to 36.84%, 41.24% and 44.14% of net earnings, respectively, in 2018, 2017 and 2016. Following the merger, subject to applicable statutory and regulatory restrictions and the discretion of First Financial’s board of directors, First Financial expects to continue its practice of paying quarterly cash dividends.

Ownership of First Financial After the Merger

Pursuant to the reorganization agreement, First Financial will issue shares of its common stock to shareholders of TB&T in the merger. For illustration purposes only, based on the number of shares of First Financial common stock issued and outstanding as of October 29, 2019, the aggregate number of shares of First Financial common stock to be received by TB&T shareholders pursuant to the terms of the reorganization agreement would have provided TB&T shareholders with aggregate ownership of approximately 4.4% of the issued and outstanding shares of First Financial common stock after completion of the merger.

Market Prices of First Financial Common Stock (page 74)

Shares of First Financial common stock are quoted on the NASDAQ Global Select Market under the symbol “FFIN.” On September 19, 2019, the last full trading day before the public announcement of the reorganization agreement, the last reported sale price of First Financial common stock was $33.11 per share. On October 25,

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2019, the latest practicable full trading day prior to the printing of this proxy statement/prospectus, First Financial common stock closed at $34.82 per share. The market price of First Financial common stock will fluctuate prior to the special meeting and the merger. You should obtain the current stock quotation for First Financial common stock. Shares of TB&T are not traded on any established public trading market.

The TB&T Special Shareholders’ Meeting (page 23)

The special meeting of shareholders of TB&T will be held on December 3, 2019, at 3:00 p.m., local time, at the Phillips Event Center, 1929 Country Club Drive, Bryan, Texas 77802. At the special meeting, you will be asked to consider and vote on the following:

1. the approval of the merger proposal; and

2. the approval of the adjournment proposal, if necessary.

Record Date Set at October 28, 2019; Approval of at LeastTwo-Thirds of Outstanding Shares Required to Approve the Merger Proposal (page 23)

You may vote at the special meeting of TB&T shareholders if you owned TB&T common stock at the close of business October 28, 2019, which is the record date for the special meeting. You can cast one vote for each share of TB&T common stock you owned at that time. As of October 28, 2019, there were 4,959,674 shares of TB&T common stock outstanding.

Approval of the merger proposal requires the affirmative vote of the holders of at leasttwo-thirds of the outstanding shares of TB&T common stock entitled to vote. If you fail to vote, it will have the effect of a vote against the merger proposal.

You may vote your shares of TB&T common stock by attending the special meeting and voting in person or by completing and mailing the enclosed proxy card. If you are the record holder of your shares, you can revoke your proxy at any time before the vote is taken at the special meeting by sending a written notice revoking the proxy or a later-dated proxy to the Secretary of TB&T, or by voting in person at the special meeting.

TB&T’s Reasons for the Merger and Recommendations of TB&T’s Board (page 31)

Based on the reasons discussed elsewhere in this proxy statement/prospectus, the board of directors of TB&T believes that the merger pursuant to the reorganization agreement is fair to you and in your best interests, and unanimously recommends that you vote “FOR” the merger proposal. For a discussion of the circumstances surrounding the merger and the factors considered by TB&T’s board of directors in approving the reorganization agreement, see page  28.

Directors and Certain Officers of TB&T are Subject to a Voting Agreement (page 24)

As of the record date, all of the directors of TB&T (12 persons) and named executive officers of TB&T were entitled to vote 812,706 shares of TB&T common stock, or approximately 16.39% of the outstanding shares of the common stock entitled to vote at the special meeting. Each of the directors has executed a Voting Agreement, dated as of September 19, 2019, referred to as the “voting agreement” in this proxy statement/prospectus, pursuant to which each director agreed to vote his shares of TB&T common stock in favor of approval of the merger pursuant to the reorganization agreement. As of the record date, 1,425,345 shares of TB&T common stock, or approximately 28.7% of the outstanding shares of TB&T common stock entitled to vote at the TB&T special meeting, are bound by the voting agreement.

The foregoing description of the voting agreement is subject to, and qualified in its entirety by reference to, the voting agreement, a form of which is attached to this proxy statement/prospectus asAppendix B and is incorporated by reference into this proxy statement/prospectus.

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Director Support Agreements (page 53)

In connection with entering into the reorganization agreement, each of the directors of TB&T entered into a director support agreement with First Financial (which we refer to in this proxy statement/prospectus as the “director support agreements”) pursuant to which they agreed to refrain from harming the goodwill of TB&T and to certain post-closing restrictive covenants.

The foregoing description of the director support agreement is subject to, and qualified in its entirety by reference to, the director support agreement, a form of which is attached to this proxy statement/prospectus asAppendix C and is incorporated by reference into this proxy statement/prospectus.

Effective Time of the Merger (page 41)

The merger will become effective at the date and time specified in the certificate of merger to be filed with the Secretary of State of the State of Texas regarding the merger. If TB&T shareholders approve the merger pursuant to the reorganization agreement at the special meeting, and if all necessary government approvals are obtained and the other conditions to the parties’ obligations to effect the merger are met or waived by the party entitled to do so, we anticipate that the merger will be completed in the first quarter of 2020, although delays could occur.

We cannot assure you that the necessary shareholder and governmental approvals will be obtained or that the other conditions to completion of the merger can or will be satisfied.

Conversion; Exchange of TB&T Stock Certificates (page 41)

After the effective time of the merger, you will receive a letter of transmittal and instructions from the exchange agent describing the procedures for surrendering your stock certificates representing shares of TB&T common stock in exchange for shares of First Financial common stock in accordance with the terms of the reorganization agreement. You must carefully review and complete the transmittal materials from the exchange agent and return them as instructed along with your stock certificates representing shares TB&T common stock or other satisfactory evidence of ownership specified by the exchange agent. Please do not send the exchange agent any stock certificates until you receive these instructions. Stock certificates delivered to the exchange agent without a properly completed letter of transmittal will be rejected and returned for corrective action. The shares of First Financial common stock issuable in exchange for the shares of TB&T common stock will be issued solely in uncertificated book-entry form.

Conditions to Completion of the Merger (page 50)

Currently, TB&T and First Financial expect to complete the merger in the first calendar quarter of 2020. As more fully described in this proxy statement/prospectus and in the reorganization agreement, the completion of the merger depends on a number of conditions being satisfied or, where legally permissible, waived. Each party’s obligations under the reorganization agreement are conditioned upon (1) subject to certain exceptions, the accuracy of the representations and warranties of the other party, (2) the performance in all material respects by the other party of its obligations under the reorganization agreement, (3) approval of the merger proposal by TB&T’s shareholders, (4) receipt of required regulatory and other third party consents or approvals, (5) no action having been taken and the absence of any statute, rule, regulation or order prohibiting the consummation of the merger, (6) the receipt of required closing documents from the other party, (7) the absence of any material adverse change with respect to the other party since September 19, 2019, (8) the effectiveness of the registration statement of which this proxy statement/prospectus is a part, and (9) receipt of an opinion of its respective legal counsel to the effect that, on the basis of facts, representations and assumptions described in such opinion, the integrated mergers will be treated as an integrated transaction that qualifies as a “reorganization” within the meaning of Section 368(a) of the Code.

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TB&T’s obligation to complete the merger is also subject to the shares of First Financial common stock to be issued pursuant to the reorganization agreement being approved for listing on NASDAQ. First Financial’s obligation to complete the merger is also subject to (1) receipt of releases from directors and certain officers of TB&T and The Bank & Trust, (2) the termination of certain employee benefit plans of TB&T, (3) receipt of fully executed employment agreements from certain employees of The Bank & Trust, (4) holders of not more than 5% of the outstanding shares of TB&T common stock having duly exercised their dissenters’ rights under the TBOC, (5) the termination and cancellation of all options to purchase common stock of TB&T; (6) receipt from TB&T of certain tax documents, (7) the repayment of by TB&T of all indebtedness owed pursuant to a certain line of credit and the release of all related encumbrances on the capital stock of The Bank & Trust, and (8) the termination and cancellation of all warrants to acquire common stock of TB&T.

Any condition to the completion of the merger, except the required shareholder and regulatory approvals, and the absence of an order or ruling prohibiting the merger, may be waived in writing by the party to the reorganization agreement entitled to the benefit of such condition. We cannot be certain when or if the conditions to the merger will be satisfied or waived, or that the merger will be completed.

Regulatory Approvals Required (page 60)

The acquisition of TB&T by First Financial requires the approval of the Board of Governors of the Federal Reserve System (the “Federal Reserve”) and the OCC. On October 2, 2019, First Financial filed an application with the Federal Reserve to obtain approval of First Financial’s acquisition of TB&T by virtue of the merger. Additionally, on October 2, 2019, First Financial Bank and The Bank & Trust filed an application with the OCC to obtain approval of the merger of First Financial Bank and The Bank & Trust, which will follow the merger of Merger Sub with and into TB&T and the subsequent merger of TB&T with and into First Financial. Although the approval of the Texas Department of Banking is not required for the merger of The Bank & Trust with and into First Financial Bank, a copy of the application filed with the Federal Reserve was filed with the Texas Department of Banking on October 8, 2019. The U.S. Department of Justice will have between 15 and 30 days following approval by the Federal Reserve to challenge the approval of the merger on antitrust grounds. While TB&T and First Financial do not know of any reason that the Department of Justice would challenge regulatory approval by the Federal Reserve or the OCC and believe that the likelihood of such action is remote, there can be no assurance that the Department of Justice will not initiate such a proceeding, or if such a proceeding is initiated, as to the result of any such challenge.

We cannot complete the merger unless it is approved by the Federal Reserve and the bank merger is approved by the OCC.

Amendments or Waiver (page 53)

We may amend the reorganization agreement and each of us may waive our right to require the other party to adhere to any term or condition of the reorganization agreement other than regulatory and shareholder approvals. Generally, the consideration to be received by the shareholders of TB&T pursuant to the reorganization agreement may not be decreased after the approval of the merger proposal without the further approval by TB&T shareholders.

Termination of the Reorganization Agreement (page 54)

The reorganization agreement can be terminated at any time prior to completion of the merger in the following circumstances:

• by the mutual written consent of First Financial and TB&T;

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• by either TB&T or First Financial (as long as the terminating party is not in material breach of any representation, warranty, covenant or other agreement contained in the reorganization agreement) if the conditions precedent to such party’s obligations to close have not been met or waived by May 15, 2020; provided, however, that such date may be extended to such later date as agreed upon by TB&T and First Financial;

• by either First Financial or TB&T if any of the transactions contemplated by the reorganization agreement are disapproved by any regulatory agency or authority whose approval is required to complete such transactions or if any court of competent jurisdiction in the United States or other federal or state governmental entity has issued an order, decree or ruling or taken any other action restraining, enjoining, invalidating or otherwise prohibiting the reorganization agreement or the transactions contemplated hereby and such disapproval, order, decree, ruling or other action is final and nonappealable; provided, however, that the party seeking to terminate the reorganization agreement pursuant to this provision is required to use its commercially reasonable efforts to contest, appeal and remove such order, decree, ruling or other action;

• by either First Financial or TB&T if it reasonably determines, in good faith and after consulting with counsel, there is substantial likelihood that any necessary regulatory approval will not be obtained or will be obtained only upon a condition or conditions that could reasonably be expected to be materially burdensome on, or materially impair the anticipated benefits of the merger to, First Financial and its subsidiaries and affiliates, taken as a whole;

• by either First Financial or TB&T if there has been any material adverse change with respect to the other party;

• subject to certain cure rights, by First Financial or TB&T, if there shall have been a breach of any of the covenants or agreements or any of the representations or warranties (or any such representation or warranty shall cease to be true and correct) set forth in the reorganization agreement or any other agreement contemplated in the reorganization agreement on the part of the other party to the reorganization agreement, which breach or failure to be true and correct, either individually or in the aggregate with all other breaches (or inaccuracies of such representations and warranties), would constitute, if occurring or continuing on the closing date, the failure of a closing condition; provided, however, that the right to terminate the reorganization agreement under this provision shall not be available to a party if it is then in material breach of any of its representations, warranties, covenants or agreements set forth in the reorganization agreement;

• by First Financial or TB&T, if TB&T does not receive the required shareholder approval at the TB&T special meeting or any adjournment or postponement thereof; provided, that TB&T may only terminate the reorganization agreement pursuant to this provision if the board of directors of TB&T recommended that the shareholders of TB&T vote in favor of the approval merger proposal;

• by First Financial, if First Financial disapproves of the results of the certain environmental inspections, secondary investigation or other environmental survey conducted in accordance with the terms of the reorganization agreement;

• by First Financial if TB&T or The Bank & Trust enter into any formal or informal administrative action with a governmental entity or any such action is threatened by a governmental entity; and

• by First Financial, if (i) TB&T has mailed this proxy statement/prospectus to its shareholders and TB&T does not hold the special meeting within 60 days thereafter, (ii) the board of directors of TB&T fails to recommend that the TB&T shareholders vote in favor of approval of the merger proposal, or (iii) the individuals that executed a voting agreement or a director support agreement have violated the terms thereof.

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Some of the Directors and Officers of TB&T Have Interests in the Merger that Differ from Your Interests (page 52)

In considering the recommendation of the board of directors of TB&T with respect to the merger proposal, you should be aware that some of TB&T’s directors and executive officers may have interests in the merger that are different from, or in addition to, the interests of the TB&T shareholders generally. Interests of directors and executive officers that may be different from or in addition to the interests of the TB&T shareholders include:

• Indemnification and Insurance. First Financial has agreed to indemnify the directors and officers of TB&T against certain liabilities arising before the effective time of the merger and TB&T is paying to provide certain “tail” insurance for the benefit of the directors and officers of TB&T.

• Employment Agreements. First Financial Bank has entered into employment agreements to be effective as of the effective time of the merger with, among other employees of The Bank & Trust, Timothy N. Bryan, Ivan M. Olson Jerry E. Fox and Michael A. Holmgreen. Among other matters, such employment agreements provide that each of Messrs. Bryan, Olson, Fox and Holmgreen may be entitled to receive retention payments if he remains employed with First Financial Bank as of the first and second anniversaries of the closing of the merger. Pursuant to these employment agreements, Messrs. Bryan, Olson, Fox and Holmgreen are expected to receive compensation following the merger for their continued service to First Financial Bank at substantially the same level as compared to their respective compensation with The Bank & Trust.

• Employee Benefit Plans. On or as soon as reasonably practicable following the merger, employees of TB&T who continue on as employees of First Financial will be entitled to participate in the First Financial health and welfare benefit and similar plans on the same terms and conditions as employees of First Financial. Subject to certain exceptions, these employees will receive credit for their years of service to TB&T or The Bank & Trust for participation, vesting and benefit accrual purposes.

• Retention Payments. Upon the closing of the merger, TB&T will pay retention bonuses totaling $3.0 million in the aggregate to certain key personnel of TB&T and The Bank & Trust to remain employed with the combined organization following the consummation of the merger.

Certain of the above payments are transaction expenses borne by TB&T shareholders. These interests are discussed in more detail in the section of this proxy statement/prospectus entitled “The Merger—Interests of TB&T’s Directors and Executive Officers in the Merger” beginning on page 52. The board of directors of TB&T was aware of these interests and considered them, among other matters, in approving the reorganization agreement.

Comparison of Rights of Shareholders of First Financial and TB&T (page 64)

TB&T is a Texas corporation and the rights of shareholders of TB&T are governed by Texas law and TB&T’s certificate of formation and bylaws. First Financial is a Texas corporation and the rights of First Financial shareholders are governed by Texas law and First Financial’s certificate of formation and bylaws. Upon completion of the merger, the shareholders of TB&T will become shareholders of First Financial and their rights will be governed by First Financial’s certificate of formation and bylaws, in addition to Texas law. First Financial’s certificate of formation and bylaws will remain the same unless later altered, amended or repealed.

Dissenters’ Rights of Appraisal in the Merger (page 61)

As a shareholder of TB&T, under Texas law you have the right to dissent from the merger and have the appraised fair value of your shares of TB&T common stock paid to you in cash. The appraised fair value may be more or less than the value of First Financial common stock and cash, if any, TB&T shareholders will receive for their shares of TB&T common stock in the merger.

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Persons having beneficial interests in TB&T common stock held of record in the name of another person, such as a broker or bank, must act promptly to cause the record holder to take the actions required under Texas law to exercise your dissenter’s rights.

In order to dissent, you must carefully follow the requirements of the TBOC including giving the required written notice prior to the special meeting at which the vote on the reorganization agreement is taken. These steps are summarized under the caption “Proposal 1: Approval of the Merger Proposal—Dissenters’ Rights of TB&T Shareholders” on page 61.

If you intend to exercise dissenters’ rights, you should carefully read the statutes and consult with your own legal counsel. You should also remember that if you return a signed proxy card, but fail to provide instructions as to how your shares of TB&T common stock are to be voted, you will be considered to have voted in favor of the merger and the reorganization agreement and you will not be able to assert dissenters’ rights.

Also, if you exercise dissenters’ rights, you may have taxable income as a result, so you should consult with your own tax advisor if you intend to dissent. See “Proposal 1: Approval of the Merger Proposal—CertainMaterial U.S. Federal Income Tax Consequences of the Merger—Dissenters.” If the merger pursuant to the reorganization agreement is approved by the shareholders of TB&T, holders of TB&T common stock who make a written objection to the merger prior to the TB&T special meeting, vote against the approval of the merger pursuant to the reorganization agreement and properly make a written demand for payment following notice of the consummation of the merger will be entitled to receive the appraised fair value of their shares in cash under the TBOC. The text of the provisions of the TBOC pertaining to dissenters’ rights is attached to this proxy statement/prospectus asAppendix E.

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SELECTED HISTORICAL FINANCIAL DATA OF FIRST FINANCIAL

The following table sets forth selected historical financial data of First Financial as of and for the years ended December 31, 2018, 2017, 2016, 2015 and 2014, have been derived from our audited consolidated financial statements. The selected historical financial data as of September 30, 2019 and 2018 and for thenine-month periods then ended are derived from First Financial’s unaudited interim financial statements, but First Financial’s management believes that such amounts reflect all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation of its financial position and results of operations as of the dates and for the periods indicated. This information is only a summary and should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and the consolidated financial statements and the notes thereto incorporated by reference into this proxy statement/prospectus from First Financial’s Annual Report on Form10-K for the fiscal year ended December 31, 2018 and Quarterly Report on Form10-Q for the fiscal quarter ended September 30, 2019. The results of operations presented below or contained elsewhere in this proxy statement/prospectus are not necessarily indicative of the results of operations that may be achieved in the future. All per share amounts have been restated to give effect to atwo-for-one stock in the form of a 100% stock dividend that was effective June 3, 2019.

	As of and for the Nine Months Ended September 30,						Year Ended December 31,
	2019			2018			2018			2017			2016			2015			2014
(dollars in thousands, except per share data)	(unaudited)
Summary Income Statement Information:
Interest income	$	237,069		$	215,209		$	291,690		$	245,975		$	232,288		$	221,623		$	198,539
Interest expense		23,301			12,723			18,930			9,288			5,451			4,088			4,181
Net interest income		213,768			202,486			272,760			236,687			226,837			217,535			194,358
Provision for loan losses		2,015			3,865			5,665			6,530			10,212			9,685			4,465
Noninterest income		81,081			76,966			101,764			91,017			85,132			73,432			66,624
Noninterest expense		144,583			142,448			190,684			173,986			165,830			149,464			137,925
Earnings before income taxes		148,251			133,139			178,175			147,188			135,927			131,818			118,592
Income tax expense		24,827			20,937			27,537			26,817			31,153			31,437			29,033
Net earnings	$	123,424		$	112,202		$	150,638		$	120,371		$	104,774		$	100,381		$	89,559
Per Share Data:
Earnings per share, basic	$	0.91		$	0.83		$	1.11		$	0.91		$	0.79		$	0.77		$	0.70
Earnings per share, assuming dilution		0.91			0.83			1.11			0.91			0.79			0.77			0.70
Cash dividends declared		0.35			0.31			0.41			0.375			0.35			0.31			0.275
Book valueat period-end		8.87			7.35			7.78			6.96			6.34			6.10			5.32
Earnings performance ratios:
Return on average assets		2.10	%		1.97	%		1.98	%		1.72	%		1.59	%		1.61	%		1.65	%
Return on average equity		14.67	%		15.43	%		15.37	%		13.63	%		12.36	%		13.60	%		14.00	%
Summary Balance Sheet Data(Period-end):
Securities	$	3,397,156		$	3,144,367		$	3,158,777		$	3,087,473		$	2,860,958		$	2,734,177		$	2,416,297
Loans (net)		4,088,926			3,834,665			3,924,106			3,452,543			3,338,426			3,308,716			2,901,167
Total assets		8,113,839			7,571,231			7,731,854			7,254,715			6,809,931			6,665,070			5,848,202
Deposits		6,397,683			6,145,282			6,180,389			5,962,961			5,478,539			5,190,169			4,750,255
Total liabilities		6,908,741			6,575,492			6,678,559			6,331,947			5,972,046			5,860,084			5,166,665
Total shareholders’ equity		1,205,098			995,739			1,053,295			922,768			837,885			804,986			681,537

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	As of and for the Nine Months Ended September 30,						Year Ended December 31,
	2019			2018			2018			2017			2016			2015			2014
(dollars in thousands, except per share data)	(unaudited)
Asset quality ratios:
Allowance for loanlosses/period-end loans		1.25	%		1.31	%		1.29	%		1.38	%		1.35	%		1.25	%		1.25	%
Nonperformingassets/period-end loans plus foreclosed assets		0.66	%		0.69	%		0.75	%		0.57	%		0.86	%		0.89	%		0.74	%
Net charge offs/average loans		0.04	%		0.04	%		0.07	%		0.12	%		0.19	%		0.15	%		0.06	%
Capital ratios:
Average shareholders’ equity/average assets		14.31	%		12.79	%		12.89	%		12.65	%		12.85	%		11.86	%		11.78	%
Total risk-based capital(1)		21.14	%		20.34	%		20.61	%		19.85	%		18.45	%		16.97	%		17.16	%
Tier 1 risk-based capital(2)		20.05	%		19.19	%		19.47	%		18.66	%		17.30	%		15.90	%		16.05	%
Common equity tier 1 capital(3)		20.05	%		19.19	%		19.47	%		18.66	%		17.30	%		15.90	%		16.05	%
Leverage ratio(4)		12.58	%		11.57	%		11.85	%		11.09	%		10.71	%		9.96	%		9.89	%
Dividend payout ratio		37.94	%		36.78	%		36.84	%		41.24	%		44.14	%		40.20	%		39.34	%

(1) Calculated by dividing atperiod-end, shareholders’ equity (before accumulated other comprehensive earnings/loss) less intangible assets plus allowance for loan losses to the extent allowed under regulatory guidelines by risk-adjusted assets.

(2) Calculated by dividingat period-end, shareholders’ equity (before accumulated other comprehensive earnings/loss) less intangible assets by risk-adjusted assets.

(3) Calculated by dividingat period-end, shareholders’ equity (before accumulated other comprehensive earnings/loss) less intangible assets by risk-adjusted assets.

(4) Calculated by dividing atperiod-end, shareholders’ equity (before accumulated other comprehensive earnings/loss) less intangible assets by quarter average assets less intangible assets.

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RISK FACTORS

In addition to general investment risks and the other information contained in or incorporated by reference into this proxy statement/prospectus, including the matters addressed under the section “Cautionary Statement Regarding Forward-Looking Statements” beginning on page 21 and the matters discussed under the caption “Risk Factors” in Annual Report on Form10-K filed with the SEC by First Financial, for the year ended December 31, 2018, as updated by other reports filed with the SEC, you should carefully consider the following risk factors in deciding how to vote on the proposals presented in this proxy statement/prospectus. See “Where You Can Find More Information” beginning on page 78.

Risks Relating to the Merger

The merger may not be completed.

Completion of the merger is subject to regulatory approval. First Financial cannot assure you that it will be successful in obtaining required regulatory approvals. If First Financial is not successful in obtaining required regulatory approvals, the merger will not be completed. If such regulatory approvals are received, there can be no assurance to the timing of those approvals or whether any conditions will be imposed that would result in certain closing conditions of the merger not being satisfied.

The consummation of the merger is also subject to other conditions precedent described in the reorganization agreement. If a condition of either party is not satisfied, the other party may be able to terminate the reorganization agreement and, in such case, the transaction would not be consummated. The parties cannot assure you that all of the conditions precedent in the reorganization agreement will be satisfied or that the merger will be completed.

The value of the shares of First Financial common stock received as merger consideration will fluctuate, and shareholders of TB&T may receive more or less value, depending upon increases and decreases in market price of First Financial’s common stock between the date of the TB&T special meeting and the date shareholders of TB&T exchange their shares for the merger consideration.

If the merger is completed, each outstanding share of TB&T common stock, other than cancelled shares and dissenting shares, will be converted, pursuant to the reorganization agreement, into the right to receive 1.2502 shares of First Financial common stock. Any change in the market price of First Financial common stock prior to the completion of the merger will affect the market value of the merger consideration that TB&T shareholders will receive following completion of the merger. At the time of the TB&T special meeting and until the date that a TB&T shareholder receives the shares of First Financial common stock to be paid as merger consideration, such shareholder will not know the value that it will receive in exchange for shares of TB&T common stock because the price of First Financial’s common stock will fluctuate based on a variety of factors that are beyond the control of First Financial, including, but not limited to, general market and economic conditions, changes in First Financial’s business, operations and prospects and regulatory considerations.

The market price of First Financial common stock after the merger may be affected by factors different from those affecting TB&T common stock or First Financial common stock currently.

The businesses of First Financial and TB&T differ in some respects and, accordingly, the results of operations of the combined company and the market price of First Financial’s shares of common stock after the merger may be affected by factors different from those currently affecting the independent results of operations of each of First Financial and TB&T. For a discussion of the business of First Financial and of certain factors to consider in connection with that business, see the documents incorporated by reference into this proxy statement/prospectus and referred to under “Where You Can Find More Information.”

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Because TB&T common stock is traded infrequently, it is difficult to determine how the fair value of TB&T common stock compares with the merger consideration.

TB&T common stock is not traded on any public markets. Any market for TB&T common stock has been illiquid and irregular. This lack of liquidity makes it difficult to determine the fair value of TB&T common stock.

Regulatory approvals may not be received, may take longer than expected or impose conditions that are not presently anticipated.

The Federal Reserve must approve First Financial’s acquisition of TB&T and the OCC must approve the merger of The Bank & Trust with and into First Financial Bank. On October 2, 2019, First Financial filed an application with the Federal Reserve to obtain approval of the merger under the BHC Act and First Financial Bank and The Bank & Trust filed an application with the OCC to obtain approval of bank merger. The Federal Reserve and the OCC will consider, among other factors, the competitive impact of the merger, the financial and managerial resources of our companies and our subsidiary banks and the convenience and needs of the communities to be served. As part of that consideration, we expect that the Federal Reserve and OCC will review issues related to capital position, safety and soundness, and legal and regulatory compliance. There can be no assurance as to whether this and other regulatory approvals will be received, the timing of those approvals or whether any conditions will be imposed.

Shareholders should bear in mind that regulatory approval reflects only the view that the merger does not contravene applicable competitive standards imposed by law, and that the merger is consistent with regulatory policies relating to safety and soundness. Further, regulatory approval is not an opinion that the proposed merger is favorable to the shareholders of either party to the merger from a financial point of view or that the regulatory authority has considered the adequacy of the terms of the merger. Regulatory approval is not an endorsement or recommendation of the merger.

TB&T will be subject to business uncertainties while the merger is pending.

Uncertainty about the effect of the merger on employees and customers of TB&T may have an adverse effect on TB&T and its wholly owned subsidiary, The Bank & Trust, and consequently on First Financial following completion of the merger. These uncertainties may impair TB&T’s ability to attract, retain and motivate key personnel until the merger is completed, and could cause customers and others that deal with TB&T to seek to change existing business relationships with TB&T. Retention of certain employees of TB&T and The Bank & Trust may be challenging while the merger is pending, as certain employees may experience uncertainty about their future roles with First Financial. If key employees depart, First Financial’s business following the merger could be harmed. See the section entitled “Proposal 1: Approval of the Merger Proposal—Covenants and Agreements—Conduct of Business Pending Effective Time” beginning on page 45 of this proxy statement/prospectus for a description of the restrictive covenants to which TB&T is subject.

Combining our two banks may be more difficult, costly or time-consuming than we expect.

First Financial Bank and The Bank & Trust have historically operated and, until the bank merger is completed, will continue to operate, independently. It is possible that the integration process could result in the loss of key employees or disruption of each bank’s ongoing business or inconsistencies in standards, controls, procedures and policies that adversely affect our ability to maintain relationships with customers and employees or to achieve the anticipated benefits of the merger. As with any combination of banking institutions, there also may be business disruptions that cause us to lose customers or cause customers to take their deposits out of our banks. The success of the combined bank following the merger may depend in large part on the ability to integrate the two businesses, business models and cultures. If we are not able to integrate our operations successfully and timely, the expected benefits of the merger may not be realized.

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Some of the directors and officers of TB&T may have interests and arrangements that may have influenced their decisions to support or recommend that you approve the merger proposal and the transactions contemplated therein.

TB&T’s shareholders should be aware that some of TB&T’s directors and executive officers may have interests in the merger and have arrangements that are different from, or in addition to, those of TB&T’s shareholders generally. The board of directors of TB&T was aware of these interests and considered these interests, among other matters, when making its decision to approve the reorganization agreement, and in recommending that TB&T’s shareholders vote in favor of approving the merger proposal. These interests include the following:

• Indemnification and Insurance. First Financial has agreed to indemnify the directors and officers of TB&T against certain liabilities arising before the effective time of the merger and TB&T is paying to provide certain “tail” insurance for the benefit of the directors and officers of TB&T.

• Employment Agreements. First Financial Bank has entered into employment agreements to be effective as of the effective time of the merger with, among other employees of The Bank & Trust, Timothy N. Bryan, Ivan M. Olson Jerry E. Fox and Michael A. Holmgreen. Among other matters, such employment agreements provide that each of Messrs. Bryan, Olson, Fox and Holmgreen may be entitled to receive retention payments if he remains employed with First Financial Bank as of the first and second anniversaries of the closing of the merger. Pursuant to these employment agreements, Messrs. Bryan, Olson, Fox and Holmgreen are expected to receive compensation following the merger for their continued service to First Financial Bank at substantially the same level as compared to their respective compensation with The Bank & Trust.

• Employee Benefit Plans. On or as soon as reasonably practicable following the merger, employees of TB&T who continue on as employees of First Financial will be entitled to participate in the First Financial health and welfare benefit and similar plans on the same terms and conditions as employees of First Financial. Subject to certain exceptions, these employees will receive credit for their years of service to TB&T or The Bank & Trust for participation, vesting and benefit accrual purposes.

• Retention Payments. Upon the closing of the merger, TB&T will pay retention bonuses totaling $3.0 million in the aggregate to certain key personnel of TB&T and The Bank & Trust to remain employed with the combined organization following the consummation of the merger.

For a more complete description of these interests, see “Proposal 1: Approval of the Merger Proposal—Interests of TB&T’s Directors and Officers in the Merger” beginning on page 52.

First Financial may fail to realize the cost savings estimated for the merger.

Although First Financial estimates that it will realize cost savings from the merger when integrated, it is possible that the estimates of the potential cost savings could turn out to be incorrect. For example, the combined purchasing power may not be as strong as expected, and therefore the cost savings could be reduced. In addition, unanticipated growth in First Financial’s business may require First Financial to continue to operate or maintain some facilities or support functions that are currently expected to be combined or reduced. The cost savings estimates also depend on our ability to combine the businesses of First Financial Bank and The Bank & Trust in a manner that permits those costs savings to be realized. If the estimates turn out to be incorrect or First Financial is not able to combine successfully the two banks, the anticipated cost savings may not be fully realized or realized at all, or may take longer to realize than expected.

TB&T shareholders will have a reduced ownership and voting interest after the merger and will exercise less influence over management.

The merger will transfer control of TB&T to First Financial and to the shareholders of First Financial. When the merger is completed, each TB&T shareholder (other than dissenting shareholders) will become a shareholder

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of First Financial with a percentage ownership of First Financial much smaller than such shareholder’s percentage ownership of TB&T. Because of this, TB&T shareholders will have less influence on the management and policies of First Financial, and thus First Financial Bank, than they now have on the management and policies of TB&T.

If the merger is not completed, First Financial and TB&T will have incurred substantial expenses without realizing the expected benefits of the merger.

Each of First Financial and TB&T has incurred and will incur substantial expenses in connection with the negotiation and completion of the transactions contemplated by the reorganization agreement, as well as the costs and expenses of filing, printing and mailing this proxy statement/prospectus and all filing and other fees paid to the SEC in connection with the merger. If the merger is not completed, First Financial and TB&T would have to recognize these expenses without realizing the expected benefits of the merger.

The opinion of TB&T’s financial advisor received by the board of directors of TB&T prior to the signing of the reorganization agreement does not reflect changes in circumstances since the date of such opinion.

The opinion of TB&T’s financial advisor received by the board of directors of TB&T was delivered on September 18, 2019. Changes in the operations and prospects of First Financial or TB&T, general market and economic conditions and other factors that may be beyond the control of First Financial or TB&T may significantly alter the value of TB&T or the price of First Financial’s common stock by the time the merger is completed. The opinion speaks only as of the date of such opinion and not as of the date of this proxy statement/prospectus, the time the merger will be completed or as of any date other than the date of such opinion.

Litigation may be filed against First Financial, TB&T or their respective boards of directors or officers, which could prevent or delay the completion of the merger or result in the payment of damages following completion of the merger.

Lawsuits may be filed against First Financial, TB&T or their respective boards of directors or officers in connection with the merger, which could prevent or delay completion of the merger and result in substantial costs to First Financial and TB&T, including any costs associated with indemnification. The defense or settlement of any lawsuit or claim that remains unresolved at the time the merger is completed may adversely affect First Financial’s and TB&T’s business, financial condition, results of operations and cash flows following completion of the merger.

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A WARNING ABOUT FORWARD-LOOKING STATEMENTS

Certain statements contained in this proxy statement/prospectus, including statements included or incorporated by reference in this proxy statement/prospectus, that are not statements of historical fact constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that are subject to risks and uncertainties. These forward-looking statements include information about possible or assumed future results of operations of First Financial after the merger is completed as well as information about the merger. Words such as “believes,” “expects,” “anticipates,” “estimates,” “intends,” “continue,” “should,” “may,” or similar expressions, or the negatives thereof, are intended to identify forward-looking statements, but are not the exclusive means of identifying such statements. Many possible events or factors could affect the future financial results and performance of each of our companies before the merger or First Financial after the merger, and could cause those results or performance to differ materially from those expressed in the forward-looking statements. These possible events or factors include, but are not limited to:

• First Financial’s actual cost savings resulting from the merger are less than expected, First Financial is unable to realize those cost savings as soon as expected or First Financial incurs additional or unexpected costs;

• First Financial’s revenues after the merger are less than expected;

• deposit attrition, operating costs, customer loss and business disruption before and after the merger, including, without limitation, difficulties in maintaining relationships with employees, may be greater than First Financial expected;

• competition among financial services companies may increase;

• the risk that the businesses of First Financial Bank and The Bank & Trust will not be integrated successfully, or such integration may be more difficult, time-consuming or costly than expected;

• the failure of TB&T’s shareholders to approve the merger proposal;

• the ability to obtain the governmental approvals of the merger on the proposed terms and schedule;

• changes in the level of nonperforming assets and charge-offs;

• changes in the interest rate environment reduce First Financial’s or TB&T’s interest margins;

• general business and economic conditions in the markets First Financial or TB&T serves change or are less favorable than expected;

• legislative or regulatory changes adversely affect First Financial’s or TB&T’s businesses;

• changes in tax rates, rules, regulations or policy;

• changes occur in business conditions and inflation;

• changes in commodity prices (i.e., oil and gas, cattle and wind energy);

• personal or commercial customers’ bankruptcies increase;

• changes occur in the securities markets; and

• technology-related changes are harder to make or more expensive than expected.

For other factors, risks and uncertainties that could cause actual results to differ materially from estimates and projections contained in forward-looking statements, please read the “Risk Factors” section of this proxy statement/prospectus.

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A forward-looking statement may include a statement of the assumptions or bases underlying the forward-looking statement. We believe we have chosen these assumptions or bases in good faith and that they are reasonable. However, we caution you that assumptions or bases almost always vary from actual results, and the differences between assumptions or bases and actual results can be material. Therefore, we caution you not to place undue reliance on our forward-looking statements. The forward-looking statements are made as of the date of this proxy statement/prospectus or the date of the applicable document incorporated by reference into this proxy statement/prospectus. We undertake no obligation to publicly update or otherwise revise any forward-looking statements, whether as a result of new information, future events or otherwise.

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GENERAL INFORMATION

This document constitutes a proxy statement of TB&T and is being furnished to all record holders of TB&T common stock as of the close of business on October 28, 2019 in connection with the solicitation of proxies by the board of directors of TB&T to be used at the special meeting of shareholders of TB&T to be held on December 3, 2019. The purpose of the TB&T special meeting is to consider and vote to approve the merger proposal.

This document also constitutes a prospectus relating to the First Financial common stock to be issued to shareholders of TB&T common stock upon completion of the merger.

TB&T SPECIAL SHAREHOLDERS’ MEETING

Date, Place and Time of the Special Meeting

The special meeting of shareholders of TB&T will be held on December 3, 2019 at 3:00 p.m., local time, at the Phillips Event Center, 1929 Country Club Drive, Bryan, Texas 77802. The special meeting may be postponed to another date or place for proper purposes, including for the purpose of soliciting additional proxies.

Purpose

The purpose of the special meeting are to consider and vote on the following:

1. the approval of the merger proposal; and

2. the approval of the adjournment proposal, if necessary.

At this time, the board of directors of TB&T and the voting representatives are unaware of any matter, other than the matter set forth above, that may be presented for action at the special meeting.

Record Date; Shares Entitled to Vote

The close of business on October 28, 2019 is the record date. The holders of record of the outstanding shares of TB&T common stock as of the close of business on the record date are entitled to notice of, and to vote at, the special meeting, or any postponement thereof. At the close of business on the record date, there were 4,959,674 shares of TB&T common stock outstanding and entitled to vote at the special meeting. At the special meeting, the shareholders of TB&T will be entitled to one vote for each share of common stock owned as of the close of business on the record date.

Quorum; Vote Required

No business may be transacted at the special meeting of shareholders of TB&T unless a quorum is present. Holders representing at least a majority of the shares of TB&T common stock entitled to vote at the special meeting must be present, either in person or represented by proxy, to constitute a quorum at the special meeting. All shares of TB&T common stock represented at the special meeting of shareholders, including shares that are represented but that vote to abstain and brokernon-votes, will be treated as present for purposes of determining the presence or absence of a quorum.

The vote of the holders of at leasttwo-thirds of the outstanding TB&T common stock entitled to vote at the special meeting of shareholders is required to approve the reorganization agreement and the merger. As a result, if shares representing at leasttwo-thirds of the shares of TB&T common stock outstanding on the close of business on the TB&T record date are not present, either in person or represented by proxy, at the special

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meeting of shareholders, the presence of a quorum will still not permit the reorganization agreement and the merger to be approved at the special meeting. Only shares of TB&T common stock are entitled to vote at the special. Failures to vote, brokernon-votes and abstentions will have the same effect as a vote against the merger proposal.

Shares Held by Directors and Named Executive Officers

As of the record date, all of the directors of TB&T (12 persons) and named executive officers of TB&T were entitled to vote, in the aggregate, 812,706 shares of TB&T common stock, or approximately 16.39% of the outstanding shares of the common stock entitled to vote at the special meeting. The directors, executive officers and certain principal shareholders of TB&T, solely in their capacity as shareholders of TB&T, have entered into a Voting Agreement, dated as of September 19, 2019, referred to as the “voting agreement” in this proxy statement/prospectus, pursuant to which each such shareholder agreed to vote his, her or its shares of TB&T common stock in favor of approval of the merger pursuant to the reorganization agreement. Under the terms of the voting agreement, such shareholders have also appointed First Financial as their proxy for voting their shares of TB&T common stock at the special meeting of shareholders. As of the record date, 1,425,345 shares of TB&T common stock, or approximately 28.7% of the outstanding shares of TB&T common stock entitled to vote at the TB&T special meeting, are bound by the voting agreement.

The foregoing description of the voting agreement is subject to, and qualified in its entirety by reference to, the voting agreement, a form of which is attached to this proxy statement/prospectus asAppendix B and is incorporated by reference into this proxy statement/prospectus.

Voting and Revocation of Proxies

Any holder of record of shares of TB&T common stock entitled to vote at the special meeting may vote by returning a signed proxy card by mail, or may vote in person by appearing at the special meeting. Proxies, in the form enclosed, which are properly executed and returned to TB&T and not subsequently revoked, will be voted in accordance with the instructions indicated on the proxies. Any properly executed proxy on which voting instructions are not specified will be voted “FOR” the merger proposal and “FOR” the adjournment proposal. The proxy also grants authority to the persons designated in such proxy to vote in accordance with their own judgment if an unscheduled matter is properly brought before the special meeting..

If you are a beneficial owner and hold your shares of TB&T common stock in “street name” through a brokerage firm, bank, trust or other nominee, you should instruct your nominee on how you wish to vote your shares of TB&T common stock using the instructions provided by your nominee. Under applicable rules, brokerage firms, banks, trusts and other nominees have the discretion to vote on routine matters. The merger proposal is anon-routine matter, and brokerage firms, banks, trusts and other nominees cannot vote onnon-routine matters without your instructions. Brokernon-votes are shares held by a brokerage firm, bank, trust or other nominee that are represented at the TB&T special meeting, but with respect to which the brokerage firm, bank, trust and other nominees is not instructed by the beneficial owner of such shares to vote on the particular proposal and the broker does not have discretionary voting power on such proposal. Therefore, it is important that you cast your vote or instruct your brokerage firm, bank, trust or other nominee on how you wish to vote your shares of TB&T common stock.

If you do not return your proxy card or attend the special meeting, your shares of TB&T common stock will not be voted, which will have the same effect as a vote against the merger. Even if you plan to attend the special meeting, if you hold your shares of TB&T common stock in your own name as the shareholder of record, please vote your shares of TB&T common stock by completing, signing, dating and returning the enclosed proxy card.

If you are the record holder of your shares, you may revoke any proxy given pursuant to this solicitation by the board of directors of TB&T at any time before it is voted at the special meeting by:

• giving written notice to the Secretary of TB&T;

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• executing a proxy bearing a later date and filing that proxy with the Secretary of TB&T at or before the special meeting; or

• attending and voting in person at the special meeting.

All written notices of revocation and other communications with respect to revocation or proxies must be received by TB&T no later than December 2, 2019, at 5:00 p.m. local time, which is the business day immediately prior to the special meeting and should be sent to: TB&T Bancshares, Inc., 1716 Briarcrest Drive, Suite 400, Bryan, Texas 77802, Attention: Jerry E. Fox, Corporate Secretary. If you hold your shares in street name with a brokerage firm, bank, trust or other nominee, you must contact such brokerage firm, bank, trust or other nominee if you wish to revoke your proxy.

Your presence without voting at the special meeting will not automatically revoke your proxy, and any revocation during the special meeting will not affect votes previously taken.

The secretary of TB&T will determine all questions as to validity, form, eligibility (including time of receipt) and acceptance of proxies. Its determination will be final and binding. The board of directors has the right to waive any irregularities or conditions as to the manner of voting. TB&T may accept your proxy by any form of communication permitted by the TBOC so long as TB&T is reasonably assured that the communication is authorized by you.

Shares Held in Street Name

Your brokerage firm, bank, trust or other nominee cannot vote your shares of TB&T common stock for or against approval and adoption of the merger proposal unless you tell the brokerage firm, bank, trust or other nominee how you wish to vote. To tell your nominee how to vote, you should follow the directions that your nominee provides to you. Please note that you may not vote your shares of TB&T common stock held in “street name” by returning a proxy card directly to TB&T or by voting in person at the special meeting unless you provide a “legal proxy,” which you must obtain from your nominee. If you do not instruct your broker or other nominee on how to vote your shares of TB&T common stock, your broker or other nominee may not vote your TB&T common shares, which will have the same effect as a vote against the merger proposal for purposes of the required vote. You should therefore provide your brokerage firm, bank, trust or other nominee with instructions as to how to vote your shares of TB&T common stock.

Solicitation of Proxies; Expenses

This proxy solicitation is made by the board of directors of TB&T. TB&T is responsible for its expenses incurred in preparing, assembling, printing and mailing this proxy statement/prospectus. Proxies will be solicited through the mail. Additionally, directors of TB&T intend to solicit proxies personally or by telephone or other means of communication. The directors will not be additionally compensated. TB&T will reimburse banks, brokers and other custodians, nominees and fiduciaries for their reasonable expenses in forwarding the proxy materials to beneficial owners.

Recommendation of TB&T’s Board of Directors

After considering various factors described in the section entitled “Proposal 1: Approval of the Merger Proposal—Recommendation of TB&T’s Board of Directors and its Reasons for the Merger,” the board of directors of TB&T has unanimously determined that the reorganization agreement and the transactions contemplated by the reorganization agreement, including the merger, are advisable and in the best interests of TB&T’s shareholders and has adopted and approved the reorganization agreement and the transactions contemplated by the reorganization agreement, including the merger. The board of directors recommends that you vote “FOR” the merger proposal and, if necessary, and “FOR” the adjournment proposal.

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Dissenters’ Rights

Holders of shares of TB&T common stock are entitled to dissenters’ rights under Subchapter H of Chapter 10 of the TBOC, provided they satisfy the special conditions and conditions set forth therein. For a more detailed discussion of your dissenters’ rights and the requirements for perfecting your dissenters’ rights, see “Proposal 1: Approval of the Merger Proposal—Dissenters’ Rights of TB&T Shareholders” on page 61. In addition, a copy of Subchapter H of Chapter 10 of the TBOC is attached asAppendix E to this proxy statement/prospectus.

Assistance

If you need assistance in completing your proxy card, have questions regarding the special meeting or would like additional copies of this proxy statement/prospectus, please contact Jerry E. Fox, Corporate Secretary, at (979)260-2106.

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PROPOSAL 1: APPROVAL OF THE MERGER PROPOSAL

The following information describes material aspects of the merger pursuant to the reorganization agreement. It is not intended to be a complete description of all information relating to the merger pursuant to the reorganization agreement and is qualified in its entirety by reference to more detailed information contained in the appendices to this document, including the reorganization agreement. A copy of the reorganization agreement is included asAppendix A and is incorporated herein by reference. You are urged to read the appendices in their entirety.

Terms of the Merger

Structure of Merger.The reorganization agreement provides for the acquisition of TB&T and its wholly owned subsidiary, The Bank & Trust, by First Financial. If (i) the shareholders of TB&T approve the merger proposal at the special meeting, (ii) the required regulatory approvals are obtained, and (iii) the other conditions to the parties’ obligations to effect the transactions contemplated by the reorganization agreement are met or waived by the party entitled to do so, we anticipate that the transactions contemplated by the reorganization agreement will be completed in the first quarter of 2020, although delays could occur.

The first transaction contemplated by the reorganization agreements is the merger of Merger Sub, a wholly owned subsidiary of First Financial, with and into TB&T, with TB&T surviving the merger as a wholly owned subsidiary of First Financial. As a result of the merger, holders of TB&T common stock as of the effective time of the merger, other than canceled shares and dissenting shares, will be entitled to receive whole shares of First Financial common stock and cash payable in lieu of any fractional share. Following the merger, certificates for TB&T common stock will only represent the right to receive the merger consideration pursuant to the reorganization agreement, and otherwise will be null and void.

Following immediately after the merger, or at such later time as First Financial may determine in its sole discretion, First Financial will cause (i) TB&T to merge with and into First Financial, with First Financial as the surviving entity and TB&T ceasing its separate corporate existence and (ii) The Bank & Trust to merge with and into First Financial Bank, with First Financial Bank as the surviving bank and The Bank & Trust ceasing its separate corporate existence. As a result of the bank merger, the existing branches and main office of The Bank & Trust will become branches of First Financial Bank.

Merger Consideration. If the merger is completed, each outstanding share of TB&T common stock, other than cancelled shares and dissenting shares, will be converted, pursuant to the reorganization agreement, into the right to receive 1.2502 shares of First Financial common stock. Any fluctuation in the market price of First Financial common stock after the date of this proxy statement/prospectus will change the value of the shares of First Financial common stock that TB&T shareholders will receive. On September 19, 2019, the last full trading day before the public announcement of the reorganization agreement, the last reported sale price of First Financial common stock was $33.11 per share, and on October 25, 2019, the latest practicable full trading day prior to the printing of this proxy statement/prospectus, the last reported sale price of First Financial common stock was $34.82 per share. For illustration purposes only, based on the number of shares of First Financial common stock issued and outstanding as of October 29, 2019, the aggregate number of shares of First Financial common stock to be received by TB&T shareholders pursuant to the terms of the reorganization agreement would have provided TB&T shareholders with aggregate ownership of approximately 4.4% of the issued and outstanding shares of First Financial common stock after completion of the merger.

In connection with the closing of the merger, TB&T may pay a special dividend to its shareholders of up to $2.0 million in the aggregate. In the event that merger is not completed prior to the record date for determining the shareholders of First Financial who are entitled to receive any regular cash dividend on First Financial common stock for the first quarter of 2020, then TB&T shareholders will be entitled to receive an additional aggregate cash amount equal to (a) the per share cash dividend on First Financial common stock declared by the First Financial board of directors with the previously mentioned record date multiplied by (b) 6,275,806 (which is the approximate number of shares of First Financial common stock to be tendered as consideration for the merger). In each case, any dividend payable by TB&T would be paid prior to the closing of the merger.

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You should read this proxy statement/prospectus carefully to understand the value of the consideration you will receive in the merger.

Background of the Merger

The TB&T board of directors and management of TB&T regularly review TB&T’s future prospects for earnings and asset growth as well as the implementation and viability of TB&T’s strategic initiatives. From time to time, the TB&T board of directors and management of TB&T will review and discuss TB&T’s long-term objectives and consider ways to enhance shareholder value and performance of the organization. These strategic discussions have focused on, among other things, the business environment facing financial institutions in general and TB&T in particular, as well as conditions and ongoing consolidation in the financial services industry and strategic alternatives to enhance TB&T’s competitive position.

Over the past several years, the TB&T organization has taken a number of actions to enhance shareholder value, liquidity and return. These actions included stock repurchase programs from time to time, authorized by regulatory authorities.

From 2014 through 2018, Timothy N. Bryan, Chairman and Chief Executive Officer of TB&T and The Bank & Trust, met several times with Scott Dueser, President and Chief Executive Officer of First Financial, at the request of Mr. Dueser. During these preliminary meetings, Messrs. Bryan and Dueser generally discussed the viability of a business combination of their organizations and the anticipated benefits and challenges for completing a merger transaction. Mr. Bryan entertained Mr. Dueser’s request based on Mr. Bryan’s desire to enhance TB&T shareholder value and provide opportunities for shareholder liquidity. These meetings took place in Bryan/College Station and Abilene, Texas and included luncheons, dinners and periodic telephone conversations. In addition, the senior management teams of First Financial and TB&T met several times during this period, primarily on thefront-end of this period, to discuss generally the anticipated benefits from and challenges to a merger, the integration of business cultures, and personnel and market considerations.

During the same time period from 2014 through 2018, TB&T, and prior to its formation in October 2017, The Bank & Trust, received informal expressions of interest from four other potential acquirors. In early 2017, First Financial made a formal written offer to The Bank & Trust, which was rejected. About this same time, a second publicly-traded Texas-based financial institution holding company made an oral acquisition offer to The Bank & Trust, which was also rejected. In terms of merger consideration, both offers were substantially less than the merger consideration provided for under the terms of the reorganization agreement.

As a result of an ongoing desire to provide shareholder liquidity and in light of the unsolicited offers that had been made to the TB&T organization, as discussed above, and as a result of a perceived recent improvement in market pricing for community bank franchises in Texas, in June of 2018, the TB&T board formed a strategic planning committee of the board of directors, chaired by Mr. Charles A. Ellison, to evaluate TB&T’s growth strategy, management succession and potential strategic opportunities involving TB&T, including potential acquisitions by TB&T of other institutions and branch offices, mergers of equals and the prospect of merging TB&T into a larger institution.

To further advance TB&T’s strategic growth objectives, on July 9, 2018, TB&T’s strategic planning committee met with representatives of Stephens Inc., or Stephens, to discuss potential acquisition opportunities and market conditions. At that meeting Stephens made a presentation to the strategic planning committee regarding the general state of the market for bank mergers and acquisitions in Texas and the Southwest. This presentation was made at the request of TB&T to provide the strategic planning committee with what was believed to be necessary information for evaluating market factors affecting TB&T’s strategic objectives and making sound recommendations to the TB&T board of directors regarding the strategic direction of TB&T and its consolidated organization. At the recommendation of the strategic planning committee, the TB&T board of directors determined to not pursue acquisition opportunities at that time and instead to make strategic investments in key leadership positions as necessary for the long-term viability of the organization.

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In late March of 2019, Mr. Dueser met with Mr. Bryan and on behalf of First Financial made an oral offer to acquire TB&T. This offer was initially considered by Mr. Bryan and his executive management team and then by TB&T’s strategic planning committee. Based on various factors, including current market conditions, the recent financial performance of First Financial and TB&T and First Financial’s recent trading prices, the strategic planning committee determined that the offer from First Financial was viable and recommended that the full TB&T board of directors consider the offer.

During these preliminary discussions, Messrs. Dueser and Bryan negotiated certain aspects of the proposed merger consideration, including that the merger consideration would be comprised of a fixed number of shares of First Financial common stock, there would be no required minimum TB&T shareholders’ equity, the definitive agreement would not provide for any price adjustments based on TB&T’s performance or underperformance, and that TB&T generally would not have a termination right based on fluctuations in First Financial’s stock price or underperformance based on any peer bank index.

On May 9, 2019, First Financial submitted a writtennon-binding letter of interest to the TB&T board of directors, which indicated a proposal for aggregate merger consideration of $190 million, based on First Financial’s stock price of $30.98 and a fixed number of shares of First Financial common stock of 6,132,990, in exchange for all of the issued and outstanding shares of TB&T common stock. The letter of interest also indicated TB&T would be permitted to pay $3.0 million inpre-closing dividends to its shareholders. The parties continued to negotiate the terms of the merger following TB&T’s receipt of the letter of interest.

On May 13, 2019, representatives of Stephens met with the TB&T executive management, providing them with its analyses of the financial terms of the First Financial offer.

On May 20, 2019, First Financial submitted a revised writtennon-binding letter of interest to the TB&T board of directors, which indicated a proposal for aggregate merger consideration of $190 million, based on First Financial’s stock price of $30.275 and a fixed number of shares of First Financial common stock of 6,275,806, in exchange for all of the issued and outstanding shares of TB&T common stock. The letter of interest also indicated TB&T would be permitted to pay $3.0 million inpre-closing dividends to its shareholders and $2.0 million in discretionary bonuses to employees of TB&T and Bank & Trust. The letter included an exclusivity period through August 31, 2019 for due diligence and the negotiation of a definitive agreement. The parties continued to negotiate certain terms of the merger.

On May 28, 2019, First Financial submitted a second revised writtennon-binding letter of interest to the TB&T board of directors. There was no change to the merger consideration from that offered in the May 20, 2019 letter of interest. The revised letter of interest permitted TB&T to use a portion of the $3.0 million set aside forpre-closing dividends as retention bonuses for certain key personnel of TB&T and The Bank & Trust to remain employed with the combined organization following the consummation of the merger. The revised letter of interest also provided that all outstanding TB&T options and warrants would be exercised before closing and participate in the merger consideration or otherwise expire. The revised letter of interest also implied that the fixed number of First Financial shares constituting the merger consideration would be based on the TB&T common stock on a fully-diluted basis (assuming all outstanding TB&T options and warrants were exercised).

Upon receipt of the second revised letter of interest, the TB&T board of directors held a special meeting on May 28, 2019 to consider First Financial’s revised offer. After due consideration of the factors discussed above and other factors, and further deliberations, the TB&T board of directors determined that it was advisable and in the best interest of TB&T and its shareholders to execute the second revised letter of interest dated May 28, 2019 and pursue a transaction with First Financial generally based on the terms and conditions set forth in such letter of interest. As part of its evaluation of the First Financial offer, the TB&T board of directors considered, among other factors, the financial, business and legal terms of the First Financial offer, historical payments and rates of cash and stock dividends on outstanding common stock of First Financial and TB&T, historical trading multiples and performance of each organization’s common stock, the timetable for completing the transaction and the

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exclusivity period proposed by First Financial, and the potential economies of scale and increased efficiencies of operations that could result from a combination with First Financial.

On June 10, 2019, First Financial entered into a confidentiality agreement with TB&T and The Bank & Trust. Upon the execution of the confidentiality agreement, First Financial established a virtual electronic data room to facilitate due diligence investigations. Senior management of First Financial met with senior management and directors of TB&T in Bryan, Texas, on June 6, 2019, to conduct certain due diligence investigations and to further discuss the merger and integration, personnel and operational matters, the philosophy and culture of the two organizations and the enhanced products and services that First Financial could bring to the Bryan/College Station, Texas market. Due diligence began in earnest the following week and progressed throughout the months of June and July, 2019. TB&T provided First Financial withnon-public information regarding TB&T and The Bank & Trust to assist First Financial in its due diligence investigation of TB&T and to further assist in the negotiation of the terms and conditions of a definitive agreement. First Financial and TB&T conducted reciprocal due diligence on each other’s businesses, including with respect to regulatory, litigation, tax, financial and other matters.

On August 28, 2019, the parties extended the exclusivity period of the letter of interest until September 30, 2019.

TB&T received the initial draft of the reorganization agreement from First Financial on August 14, 2019 and the parties negotiated the terms of the reorganization agreement until the document was executed on September 19, 2019. On April 23, 2019, the First Financial board of directors declared atwo-for-one stock split in the form of a 100% stock dividend effective for shareholders of record of First Financial on May 15, 2019 to be distributed on June 3, 2019. As a result of First Financial’s stock split and to adjust for rounding of the exchange ratio based on the fixed number of shares of First Financial common stock provided in the executed letter of interest, the merger consideration was adjusted to 6,275,806 shares of First Financial common stock.

On September 9, 2019, TB&T’s financial advisor, Stephens, and TB&T’s legal counsel, Fenimore, Kay, Harrison & Ford, LLP, conducted a reverse due diligence conference call with senior management of First Financial covering First Financial’s corporate strategy, credit quality and loan portfolio trends, financial performance for 2018 andyear-to-date 2019 and key assumptions related to First Financial projected performance and earnings, certain operational matters and regulatory compliance and legal matters.

The TB&T board of directors was apprised of the negotiations with First Financial and progress on the transaction documents and due diligence investigations at each monthly meeting of the TB&T board in June, July and August, 2019.

On September 17, 2019, Stephens was formally engaged by TB&T to provide a fairness opinion to the TB&T board of directors with respect to the merger consideration provided for under the reorganization agreement.

On September 17, 2019, the management of First Financial met with the board of directors of First Financial to discuss the terms of the merger and the reorganization agreement. Following such session, the First Financial board of directors unanimously approved and authorized by written consent the reorganization agreement, the merger and the other transactions contemplated by the reorganization agreement, and authorized First Financial’s management to execute and deliver the reorganization agreement.

On September 18, 2019, the TB&T board of directors met with TB&T’s legal and financial advisors to consider and discuss the reorganization agreement, which was in its substantially final form. At this meeting, Stephens reviewed the financial aspects of the merger. At the conclusion of its presentation and after responding to questions from the TB&T board of directors, Stephens rendered to the TB&T board of directors its oral opinion that the aggregate merger consideration to be received by TB&T shareholders from First Financial in the

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merger, which consisted of 6,275,806 shares of First Financial common stock, was fair to TB&T from a financial point of view. Stephens also delivered its written opinion, dated September 18, 2019, to the TB&T board of directors. Also, at this meeting, Fenimore, Kay, Harrison & Ford, LLP, TB&T’s legal counsel, reviewed the material legal terms of the reorganization agreement and ancillary legal documents to the reorganization agreement. TB&T’s legal counsel also reviewed in detail the business points, contingencies and timing considerations related to the merger. The TB&T board of directors asked a series of questions to TB&T’s advisors regarding the terms and conditions of the reorganization agreement and engaged in a full discussion regarding the proposed transaction.

Based upon the TB&T board’s review and discussion of the reorganization agreement, the opinion of Stephens and other relevant factors, the TB&T board of directors unanimously approved and authorized the reorganization agreement, the merger and the other transactions contemplated by the reorganization agreement, and authorized TB&T’s management to execute and deliver the reorganization agreement.

On September 19, 2019, TB&T, First Financial and Merger Sub executed the reorganization agreement, certain shareholders of TB&T executed the voting agreement and the directors of TB&T delivered to First Financial their director support agreement. First Financial issued a press release announcing the proposed transaction after the close of trading markets on September 19, 2019.

Recommendation of TB&T’s Board of Directors and its Reasons for the Merger

TB&T’s board of directors has unanimously approved the reorganization agreement and unanimously recommends that the shareholders of TB&T vote “FOR” the merger proposal.

The terms of the reorganization agreement, including the consideration to be paid to TB&T shareholders, were the result of arms-length negotiations between the representatives of TB&T and representatives of First Financial. In reaching its decision to approve the reorganization agreement and the merger and recommend the merger proposal to its shareholders, the board of directors of TB&T evaluated the merger and the reorganization agreement, in consultation with TB&T’s management, as well as its legal and financial advisors, and considered a number of positive factors, including the following material factors:

• the TB&T board’s familiarity with and review of information concerning the business, results of operations, asset quality, financial condition, competitive position and future prospects of TB&T and The Bank and Trust;

• the TB&T board’s knowledge of the current and prospective environment in which TB&T operates, including national, regional and local economic conditions and the interest rate environment, increased operating costs resulting from regulatory initiatives and compliance mandates, the competitive environment for banks, thrifts and other financial institutions generally and the increased regulatory burdens on financial institutions generally, evolving trends in technology, the trend toward consolidation in the banking industry and in the financial services industry, and the likely effects of these factors on TB&T’s potential for growth, development, productivity, profitability and strategic options;

• the complementary aspects of TB&T’s and First Financial’s respective businesses, including customer focus, geographic coverage, business orientation and compatibility of the companies’ management and operating styles;

• the results that TB&T could expect to obtain if it continued to operate independently, and the likely benefits to shareholders of that course of action, as compared with the value of the merger consideration offered by First Financial and TB&T’s belief that a merger with First Financial would allow TB&T shareholders to participate in the future performance of a combined, more diversified banking organization operating in a broader geographic area that would likely have better future prospects than TB&T was likely to achieve on a stand-alone basis or through other strategic alternatives;

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• the limited liquidity that TB&T shareholders have with respect to their investment in TB&T, for which there is no active public market, and that shareholders of TB&T will receive merger consideration in shares of First Financial common stock, which is publicly traded on the NASDAQ Global Select Market, which would be expected to provide such shareholders with increased liquidity of their investment;

• that the number of shares of First Financial common stock to be issued to TB&T shareholders is fixed based on an exchange ratio of 1.2502 shares of First Financial common stock for each share of TB&T common stock outstanding as of the effective time of the merger;

• the financial presentation of Stephens and the opinion of Stephens, dated as of September 18, 2019, that, as of the date of such opinion, and subject to the assumptions, limitations and qualifications set forth in the opinion, the aggregate merger consideration to be received by TB&T was fair, from a financial point of view, to TB&T (see “—Opinion of TB&T’s Financial Advisor,” beginning on page 33);

• the treatment of the merger as a “reorganization” within the meaning of Section 368(a) of the Code with respect to TB&T common stock exchanged for First Financial common stock;

• the ability of First Financial to pay the aggregate merger consideration without a financing contingency and without the need to obtain financing to close the transaction;

• the regulatory and other approvals required in connection with the merger and the likelihood that the approvals needed to complete the merger will be obtained within a reasonable time and without unacceptable conditions;

• the potential benefits and opportunities for employees of TB&T and The Bank & Trust as a result of both employment opportunities and benefit plans in a larger organization;

• the merger with a larger holding company would provide the opportunity to realize economies of scale, increase efficiencies of operations and enhance the development of new products and services; and

• the acceleration all of all unvested TB&T stock options and that all outstanding stock options and warrants may be exercised by the holders thereof prior to closing.

The TB&T board of directors also considered potential risks and potentially negative factors concerning the merger in connection with its deliberations of the proposed transaction, including the following material factors:

• the challenges of combining the businesses, assets and workforces of two financial institutions;

• the potential risk of diverting management focus and resources from other strategic opportunities and from operational matters while working to implement the merger;

• the risks and costs to TB&T if the merger is not completed;

• the fact that the merger consideration, which consists of shares of First Financial common stock (other than fractional shares that are paid in cash), provides less certainty of value to TB&T shareholders compared to a transaction in which they would receive only cash consideration;

• the potential for unintended delays in the regulatory approval process;

• the fact that the reorganization agreement prohibits TB&T from soliciting acquisition proposals or engaging in negotiations concerning or providing nonpublic information to any person relating to an acquisition proposal;

• that some of TB&T’s directors and executive officers have other financial interests in the merger in addition to their interests as TB&T shareholders, including financial interests that are the result of existing compensation arrangements with TB&T and/or prospective compensation arrangements with First Financial and the manner in which such interests would be affected by the merger;

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• the requirement that TB&T conduct its business in the ordinary course and other restrictions on the conduct of TB&T’s business before completion of the merger, which may delay or prevent TB&T from undertaking business opportunities that may arise before completion of the merger;

• the risk that the anticipated benefits of the merger, including the realization of synergies and cost savings, may not be realized or may take longer than expected to be realized; and

• the possible effects during the pendency or upon completion of the transactions contemplated by the reorganization agreement, including any suit, action or proceeding initiated in respect of the merger.

The foregoing discussion of the factors considered by the TB&T board of directors is not intended to be exhaustive but does include all material factors considered by the TB&T board of directors in approving the merger and the reorganization agreement. In reaching its determination, the TB&T board of directors did not assign any relative or specific weights to different factors, and individual directors may have given different weights to different factors. Based on the reasons stated, the TB&T board of directors believed that the merger was in the best interest of TB&T’s shareholders, and therefore the TB&T board of directors unanimously approved the reorganization agreement and the merger. In addition, all members of the TB&T board of directors have entered into a voting agreement requiring them to vote their shares of TB&T common stock over which they have voting authority in favor of the reorganization agreement and the merger.

THE BOARD OF DIRECTORS OF TB&T UNANIMOUSLY RECOMMENDS THAT THE HOLDERS OF TB&T COMMON STOCK VOTE (I) “FOR” THE MERGER PROPOSAL AND (II) “FOR” THE ADJOURNMENT PROPOSAL.

Opinion of TB&T’s Financial Advisor

The fairness opinion and a summary of the underlying financial analyses of TB&T’s financial advisor, Stephens, is described below. The description contains projections, estimates and other forward-looking statements about the future earnings or other measures of the future performance of TB&T. The projections were based on numerous variables and assumptions, which are inherently uncertain, including factors related to general economic and competitive conditions. Accordingly, actual results could vary significantly from those set forth in the projections. You should review the copy of the fairness opinion, which is attached asAppendix D.

Stephens was retained to provide a fairness opinion to TB&T in connection with the proposed merger of TB&T with and into First Financial, referred to herein as the merger. TB&T requested the opinion of Stephens as to whether the merger was fair to TB&T from a financial point of view. On September 18, 2019, Stephens delivered its oral opinion to the board of directors and subsequently confirmed in a written opinion, dated September 18, 2019 that, as of that date and based upon and subject to the assumptions and qualifications stated in its written opinion, the consideration to be exchanged by First Financial for the outstanding common stock of TB&T in the merger was fair, from a financial point of view, to TB&T.

Stephens provided the opinion described above for the information and assistance of the board of directors of TB&T in connection with its consideration of whether to approve the reorganization agreement. The terms of the merger, including the amount and form of the consideration payable pursuant to the reorganization agreement to TB&T’s shareholders, were determined through negotiations between TB&T and First Financial, and were approved by the board of directors. Stephens did not recommend the amount or form of consideration payable pursuant to the reorganization agreement. The full text of the written opinion letter of Stephens, dated September 18, 2019, which sets forth assumptions made, procedures followed, matters considered, qualifications stated and limitations to the review undertaken in connection with its opinion is attached asAppendix D to this proxy statement/prospectus.

Stephens’ opinion does not address the merits of the underlying decision by TB&T to enter into the merger, the merits of the merger as compared to other alternatives potentially available to TB&T or the relative effects of

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any alternative transaction in which TB&T might engage, nor is it intended to be a recommendation to any person as to how to vote on the proposal to approve the merger. In addition, Stephens was not asked to address, and Stephens’ opinion does not address, the fairness to, or any other consideration of, the holders of any class of securities, creditors or other constituencies of TB&T. Stephens was not asked to express any opinion, and does not express any opinion, as to the fairness of the amount or nature of the compensation to any of TB&T’s officers, directors or employees, or to any group of such officers, directors or employees, relative to the compensation to other shareholders of TB&T, including (but not limited to) any consideration expected to be received by any such persons in connection with the merger. Stephens’ fairness opinion committee approved the issuance of Stephens’ opinion.

In connection with rendering its opinion Stephens:

• analyzed certain publicly available financial statements and reports regarding TB&T and First Financial;

• analyzed certain audited financial statements regarding TB&T and First Financial;

• analyzed certain internal financial statements and other financial and operating data concerning TB&T and First Financial prepared by management of TB&T and First Financial, respectively;

• analyzed, on a pro forma basis, in reliance upon consensus research estimates and upon financial projections and other information and assumptions concerning TB&T provided by the management team of TB&T, the effect of the merger on the balance sheet, capitalization ratios, earnings and book value both in the aggregate and, where applicable, on a per share basis of TB&T;

• reviewed the reported prices and trading activity for the common stock of First Financial;

• compared the financial performance of TB&T and First Financial with that of certain other publicly-traded companies and their securities that Stephens deemed relevant to its analysis of the merger;

• reviewed the financial terms, to the extent publicly available, of certain merger or acquisition transactions that Stephens deemed relevant to its analysis of the merger;

• reviewed the then most recent draft of the reorganization agreement and related documents provided to Stephens by TB&T;

• discussed with management of TB&T the operations of and future business prospects for TB&T and First Financial and the anticipated financial consequences of the merger to TB&T;

• assisted in deliberations regarding the material terms of the merger and negotiations with First Financial; and

• performed such other analyses and provided such other services as Stephens deemed appropriate.

Stephens has relied on the accuracy and completeness of the information and financial data provided by TB&T and First Financial and of the other information reviewed by Stephens in connection with the preparation of Stephens’ opinion, and its opinion is based upon such information. Stephens has not assumed any responsibility for independent verification of the accuracy or completeness of any of such information and financial data. The managements of TB&T and First Financial have assured Stephens that they are not aware of any relevant information that has been omitted or remains undisclosed to Stephens. Stephens has not assumed any responsibility for making or undertaking an independent evaluation or appraisal of any of the assets or liabilities of TB&T or of First Financial, and Stephens has not been furnished with any such evaluations or appraisals; nor has Stephens evaluated the solvency or fair value of TB&T or of First Financial under any laws relating to bankruptcy, insolvency or similar matters. Stephens has not assumed any obligation to conduct any physical inspection of the properties or facilities of TB&T or First Financial. With respect to the financial forecasts prepared by the management of TB&T, including the forecasts of potential cost savings or synergies, Stephens has assumed that such financial forecasts have been reasonably prepared and reflect the best currently

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available estimates and judgments of the management of TB&T as to the future financial performance of TB&T and that the financial results reflected by such projections will be realized as predicted. In addition, Stephens has not received or reviewed any individual credit files nor has Stephens made an evaluation of the adequacy of the allowance for loan losses of TB&T or First Financial. Stephens has also assumed that the representations and warranties contained in the reorganization agreement and all related documents are true, correct and complete in all material respects.

Stephens’ opinion is necessarily based upon market, economic and other conditions as they exist and can be evaluated on, and on the information made available to Stephens as of, September 18, 2019. It should be understood that subsequent developments may affect the opinion and that Stephens does not have any obligations to update, revise or reaffirm its opinion. Stephens has assumed that the merger will be consummated on the terms of the latest draft of the reorganization agreement provided to Stephens, without material waiver or modification. Stephens has assumed that in the course of obtaining the necessary regulatory, lending or other consents or approvals (contractual or otherwise) for the merger, no restrictions, including any divestiture requirements or amendments or modifications, will be imposed that would have a material adverse effect on the contemplated benefits of the merger to TB&T or its shareholders. Stephens is not expressing any opinion herein as to the price at which the common stock or any other securities of TB&T will trade following the announcement of the merger.

The following is a summary of the material financial analyses performed and material factors considered by Stephens in connection with its opinion. Stephens performed certain procedures, including each of the financial analyses described below, and reviewed with TB&T’s executive management and board of directors the assumptions upon which the analyses were based, as well as other factors. Although this summary does not purport to describe all of the analyses performed or factors considered by Stephens within this regard, it does set forth those considered by Stephens to be material in arriving at its opinion. The order of the summaries of analyses described does not represent the relative importance or weight given to those analyses by Stephens. It should be noted that in arriving at its opinion, Stephens did not attribute any particular weight to any analysis or factor considered by it, but rather made qualitative judgments as to the significance and relevance of each analysis and factor. Accordingly, Stephens believes that its analysis must be considered as a whole and that considering any portion of such analyses and factors, without considering all analyses and factors as a whole, could create a misleading or incomplete view of the process underlying its opinion.

Summary of Proposed Transaction: Pursuant to the reorganization agreement and for purposes of its opinion, Stephens assumed the consideration to be exchanged by First Financial for the outstanding TB&T common stock to have an aggregate value of $209.0 million, subject to potential adjustments as more fully defined in the reorganization agreement. At the time of Stephens’ opinion, the reorganization agreement provided that First Financial will issue a total of 6,275,806 shares worth approximately $209.0 million, based upon First Financial’s stock valued at $30.30 per share, based on the closing price as of September 13, 2019. Based upon the unaudited financial information as of and for the twelve months ended June 30, 2019, Stephens calculated the following transaction multiples:

Transaction Value / Tangible Book Value:	2.99	x
Transaction Value / Last Twelve Months (“LTM”) Earnings:	19.6	x
Transaction Value / 2019 Estimated Net Income:	18.6	x
Core Deposit Premium:	28.3	%

Note: The last twelve months net income of the acquired company based on the most recent available financial statements prior to announcement. Estimated 2019 net income based on assumptions provided by TB&T management.

Relevant Public Companies Analysis: Stephens compared the financial condition, operating statistics and market valuation of TB&T to selected relevant public companies and their stock trading prices. Stephens selected the companies outlined below because their relative asset size and financial performance, among other factors,

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are reasonably similar to TB&T; however, no selected company below is identical to TB&T. A complete analysis involves complex considerations and qualitative judgments concerning differences in financial and operating characteristics and other factors that could affect the public trading values of the relevant public companies. Mathematical analysis (such as determining the mean or the median) is not in itself a meaningful method of using relevant public company data.

Relevant Public Companies—TB&T Bancshares, Inc.:

Stephens selected the following relevant public companies with assets between $400 million and $1.5 billion, with a Last Twelve Months Core ROAA greater than 1.25% (total assets noted parenthetically):

• Ames National Corporation ($1.47 billion)

• Bank of Commerce Holdings ($1.44 billion)

• MBT Financial Corp. ($1.33 billion)

• Select Bancorp, Inc. ($1.32 billion)

• Marlin Business Services Corp. ($1.28 billion)

• National Bankshares, Inc. ($1.27 billion)

• Capital Bancorp, Inc. ($1.23 billion)

• Northeast Bank ($1.15 billion)

• OP Bancorp ($1.13 billion)

• Peoples Bancorp of North Carolina, Inc. ($1.12 billion)

• United Security Bancshares ($1.00 billion)

• Plumas Bancorp ($839 million)

• First Capital, Inc. ($835 million)

• Bank7 Corp. ($798 million)

• First National Corporation ($778 million)

• Union Bankshares, Inc. ($774 million)

• Esquire Financial Holdings, Inc. ($732 million)

To perform this analysis, Stephens examined publicly available financial information as of and for the last twelve month period ended June 30, 2019, or the most recently reported period available, and the market trading multiples of the relevant public companies based on September 13, 2019 closing prices. The financial data included in the table presented below may not correspond precisely to the data reported in historical financial statements as a result of the assumptions and methods used by Stephens to compute the financial data presented. The table below contains selected information utilized by Stephens in the analysis:

	TB&T			25th Percentile			Median			75th Percentile
LTM Core Return on Average Equity		16.8	%		11.5	%		12.9	%		14.4	%
LTM Core Return on Average Assets		1.78	%		1.30	%		1.38	%		1.75	%
Tangible Common Equity / Tangible Assets		11.2	%		10.2	%		11.6	%		13.1	%
NPAs Plus 90 Days PD / Loans Plus OREO		0.02	%		0.66	%		0.73	%		1.47	%
Price / Tangible Book Value per Share		—			1.34	x		1.53	x		1.67	x
Price / LTM EPS		—			11.7	x		12.9	x		16.2	x
Price / 2019 Estimated EPS		—			10.3	x		12.8	x		14.2	x

Source: SNL Financial

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Relevant Texas Transactions Analysis: Stephens analyzed selected transaction multiples and related financial data for relevant transactions in Texas announced since January 1, 2018 with target assets between $400 million and $1.5 billion, with a Last Twelve Months ROAA greater than 1.00%. The following transactions were considered by Stephens because each acquired company’s relative asset size, financial performance and markets of operation, among other factors, is reasonably similar to TB&T’s (in each case, the first named company was the acquirer and the second named company was the acquired company and the transaction announcement date is noted parenthetically):

• South Plains Financial, Inc. / West Texas State Bank (7/25/19)

• BancFirst Corporation / Pegasus Bank (4/24/19)

• Spirit of Texas Bancshares, Inc. / First Beeville Financial Corporation (11/27/18)

• Allegiance Bancshares, Inc. / Post Oak Bancshares, Inc. (4/30/18)

• BancorpSouth Bank / Icon Capital Corporation (4/18/18)

Stephens considered these selected transactions to be reasonably similar, but not identical, to the merger. A complete analysis involves complex considerations and qualitative judgments concerning differences in the selected transactions and other factors that could affect the transaction values in those selected transactions to which the merger is being compared. Mathematical analysis (such as determining the mean or the median) is not in itself a meaningful method of using selected transaction data. Stephens compared certain proposed transaction multiples of the merger to the 25^th percentile, median, mean and 75^th percentile transaction multiples of the relevant transactions:

	TB&T			25th Percentile			Median			75th Percentile
Target LTM ROAE		16.8	%		10.6	%		11.0	%		14.7	%
Target LTM ROAA		1.78	%		1.16	%		1.17	%		1.23	%
Target NPAs / Total Assets		0.0	%		0.2	%		0.3	%		0.7	%
Target TCE / TA		11.2	%		8.4	%		8.5	%		11.0	%
Transaction Value / Tangible Book Value		2.99	x		1.85	x		2.18	x		2.24	x
Transaction Value / LTM Earnings(1)		19.6	x		15.9	x		17.1	x		20.8	x
Core Deposit Premium		28.3	%		8.9	%		13.9	%		16.0	%

(1) When necessary for comparables, reflects the impact of a 21% tax effect due to subchapter S corporate status

Source: SNL Financial

Relevant Nationwide Transactions Analysis: Stephens analyzed selected transaction multiples and related financial data for relevant nationwide transactions announced since January 1, 2018 with target assets between $400 million and $1.5 billion, with a Last Twelve Months ROAA greater than 1.25%. The following transactions were considered by Stephens because each acquired company’s relative asset size and financial performance, among other factors, is reasonably similar to TB&T (in each case, the first named company was the acquirer and the second named company was the acquired company and the transaction announcement date is noted parenthetically):

• Wintrust Financial Corporation / SBC, Incorporated (7/25/19)

• Heritage Commerce Corp. / Presidio Bank (5/16/19)

• Glacier Bancorp, Inc. / Heritage Bancorp (4/3/19)

• BancorpSouth Bank / Summit Financial Enterprises, Inc. (3/5/19)

• Spirit of Texas Bancshares, Inc. / First Beeville Financial Corporation (11/27/18)

• First Citizens BancShares, Inc. / Biscayne Bancshares, Inc. (11/16/18)

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• MidWestOne Financial Group, Inc. / ATBancorp (8/22/18)

• National Commerce Corporation / Landmark Bancshares, Inc. (4/24/18)

Stephens considered these selected transactions to be reasonably similar, but not identical, to the merger. A complete analysis involves complex considerations and qualitative judgments concerning differences in the selected transactions and other factors that could affect the transaction values in those selected transactions to which the merger is being compared. Mathematical analysis (such as determining the mean or the median) is not in itself a meaningful method of using selected transaction data. Stephens compared certain proposed transaction multiples of the merger to the 25^th percentile, median, mean and 75^th percentile transaction multiples of the relevant transactions:

	TB&T			25th Percentile			Median			75th Percentile
Target LTM ROAE		16.8	%		13.6	%		14.8	%		17.3	%
Target LTM ROAA		1.78	%		1.36	%		1.48	%		1.61	%
Target NPAs / Total Assets		0.0	%		0.4	%		0.8	%		1.1	%
Target TCE / TA		11.2	%		8.4	%		8.8	%		11.0	%
Transaction Value / Tangible Book Value		2.99	x		1.77	x		1.83	x		2.08	x
Transaction Value / LTM Earnings(1)		19.6	x		12.1	x		13.4	x		14.6	x
Core Deposit Premium		28.3	%		9.3	%		10.8	%		15.1	%

(1) When necessary for comparables, reflects the impact of a 21% tax effect due to subchapter S corporate status

Source: SNL Financial

Discounted Cash Flow Analysis: Stephens performed a discounted cash flow analysis using projections developed by TB&T executive management. Stephens calculated a range of implied equity values for TB&T based upon the discounted net present value of the projectedafter-tax free cash flows for the projected period. Stephens determined the amount of cash flow assuming (i) a terminal earnings multiple of 12.0x, (ii) dividend payments for earnings and excess capital above a tangible common equity to tangible asset ratio of 9.0% from 2019 to 2023 and (iii) the present value of TB&T’s implied terminal value at the end of such period. Stephens calculated the terminal value of TB&T based on 2024 estimated earnings and multiples of 11.0x to 13.0x. Stephens considered discount rates from 12.0% to 14.0%. Based on this analysis, Stephens derived a range for the implied equity value of TB&T from $132.3 to $160.3 million.

Financial Impact Analysis: Stephens analyzed the estimated merger consequences of certain pro forma combined income statement and balance sheet information of TB&T and First Financial. Stephens discussed key assumptions regarding the expected accounting treatment, potential cost savings and other acquisition adjustments resulting from the merger with management of TB&T and First Financial. Stephens’ analysis utilized consensus earnings estimates for First Financial as of September 13, 2019, as well as earnings estimates for TB&T provided by TB&T executive management. Based on this analysis, Stephens estimated that the merger would likely be accretive to First Financial’s consensus earnings per share following the closing of the merger and would be accretive to First Financial’s tangible book value per share. Stephens also estimated that First Financial would maintain capital ratios in excess of those required by First Financial to be considered well-capitalized under existing regulations. The actual results achieved by First Financial following the merger will likely vary from these projected results analyzed by Stephens, and the variations may be material.

Miscellaneous: As part of Stephens’ investment banking business, Stephens regularly issues fairness opinions and is continually engaged in the valuation of companies and their securities in connection with business reorganizations, private placements, negotiated underwritings, mergers and acquisitions and valuations for estate, corporate and other purposes.

Stephens served as financial adviser to TB&T in connection with the merger, and will receive from TB&T a customary fee for its services as financial adviser to TB&T, a portion of which is contingent upon the

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consummation of the merger. Stephens also received a fee from TB&T for providing its opinion to the board of directors. TB&T has also agreed to indemnify Stephens for certain liabilities arising out of its engagement, including certain liabilities that could arise out of it providing the Opinion letter. During the past two years Stephens has not received any fees from the Company or the Buyer in connection with investment banking services, and Stephens has received compensation for securities brokerage services in customary amounts from First Financial or its affiliates. In the ordinary course of business, Stephens Inc. and its affiliates at any time may hold long or short positions, and may trade or otherwise effect transactions as principal or for the accounts of customers, in debt or equity securities or options on securities of TB&T or of any other participant in the merger.

Conclusion: Based upon the foregoing and its general experience as investment bankers, and subject to the assumptions and qualifications set forth in its fairness opinion letter, Stephens concluded that the consideration to be exchanged by TB&T in the merger is fair to TB&T from a financial point of view. The full text of the fairness opinion is included asAppendix D to this proxy statement/prospectus.

Certain Unaudited Prospective Financial Information of TB&T

TB&T does not as a matter of course make public projections as to future performance, revenues, earnings or other financial results due to, among other reasons, the uncertainty of the underlying assumptions and estimates. However, TB&T is including in this document certain unaudited prospective financial information that was made available to TB&T’s financial advisor in connection with the merger. The inclusion of this information should not be regarded as an indication that any of TB&T, Stephens or First Financial or any of their respective representatives considered, or now considers, the information to be necessarily predictive of actual future results.

This information, which was prepared by management of TB&T, was prepared solely for internal use and is subjective in many respects. The unaudited prospective financial information reflects numerous estimates and assumptions made with respect to business, economic, market, competition, regulatory and financial conditions and matters specific to the business of TB&T, all of which are difficult to predict and many of which are beyond the control of TB&T. The unaudited prospective financial information reflects assumptions as to certain business decisions that are subject to change and, in many respects, subjective judgment, and thus is susceptible to multiple interpretations and periodic revisions based on actual experience and business developments. TB&T can give no assurance that the unaudited prospective financial information and the underlying estimates and assumptions will be realized. In addition, because the unaudited prospective financial information covers multiple years, the information by its nature becomes less predictive with each successive year. Actual results may differ materially from those set forth below, and important factors that may affect actual results and cause the unaudited prospective financial information to be inaccurate include, but are not limited to, risks and uncertainties relating to the business of TB&T, industry performance, general business and economic conditions, customer requirements, competition and adverse changes in applicable laws, regulations or policies. For other factors that could cause actual results to differ, please see the sections entitled “Risk Factors” and “Cautionary Statement Regarding Forward-Looking Statements” beginning on page 17 and page 21, respectively, of this proxy statement/prospectus.

The unaudited prospective financial information was not prepared with a view toward public disclosure, nor was it prepared with a view toward compliance with generally accepted accounting principles of the United States, which we refer to as “GAAP,” published guidelines of the SEC or the guidelines established by the American Institute of Certified Public Accountants for preparation and presentation of prospective financial information. In addition, the unaudited prospective financial information requires significant estimates and assumptions that make it inherently less comparable to the similarly titled GAAP measures in the historical GAAP financial statements of TB&T. Neither TB&T’s independent accountants, nor any other independent accountants, have compiled, examined or performed any procedures with respect to the unaudited prospective financial information shown below, nor have they expressed any opinion or any other form of assurance on such information or its achievability.

Furthermore, the unaudited prospective financial information does not take into account any circumstances or events occurring after the date it was prepared. TB&T can give no assurance that, had the unaudited

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prospective financial information been prepared either as of the date of the reorganization agreement or as of the date of this proxy statement/prospectus, similar estimates and assumptions would be used. TB&T does not intend to, and disclaims any obligation to, make publicly available any update or other revision to the unaudited prospective financial information to reflect circumstances existing since their preparation or to reflect the occurrence of unanticipated events, even in the event that any or all of the underlying assumptions are shown to be in error, or to reflect changes in general economic or industry conditions. The unaudited prospective financial information does not take into account the possible financial and other effects on either First Financial or TB&T, as applicable, of the merger and does not attempt to predict or suggest future results of the combined company. The unaudited prospective financial information does not give effect to the impact of negotiating or executing the reorganization agreement, the expenses that may be incurred in connection with consummating the merger, the potential synergies that may be achieved by the combined company as a result of the merger, the effect of any business or strategic decision or action that has been or will be taken as a result of the reorganization agreement having been executed, or the effect on either TB&T or First Financial, as applicable, of any business or strategic decisions or actions that would likely have been taken if the reorganization agreement had not been executed, but which were instead altered, accelerated, postponed or not taken in anticipation of the merger. Further, the unaudited prospective financial information does not take into account the effect on either First Financial or TB&T, as applicable, of any possible failure of the merger to occur. None of First Financial, TB&T or Stephens or their respective affiliates, officers, directors, advisors or other representatives has made, makes or is authorized in the future to make any representation to any shareholder of TB&T or First Financial, or any other person, regarding TB&T’s actual performance compared to the information contained in the unaudited prospective financial information or that the projected results will be achieved. The inclusion of the unaudited prospective financial information should not be deemed an admission or representation by TB&T or First Financial that it is viewed as material information of TB&T, particularly in light of the inherent risks and uncertainties associated with such forecasts. The summary of the unaudited prospective financial information included below is not being included to influence your decision whether to vote for the merger and the transactions contemplated in connection with the merger, but is being provided solely because it was made available to TB&T’s financial advisor in connection with the merger.

In light of the foregoing, and considering that the special meeting of shareholders of TB&T will be held several months after the unaudited prospective financial information was prepared, as well as the uncertainties inherent in any forecasted information, shareholders of TB&T are cautioned not to place unwarranted reliance on such information in connection with their consideration of the merger.

For purposes of performing a valuation analysis of TB&T, on a stand-alone basis, Stephens used projections of TB&T net income available to common shareholders as prepared by TB&T management of $11.25 million for the year ended December 31, 2019 and $12.25 million for the year ended December 31, 2020. In addition, based on the guidance of TB&T’s management, Stephens assumed an annual growth rate with respect to TB&T’s net income available to common shareholders of 8.0% for the three years thereafter.

First Financial’s Reasons for the Merger

As a part of First Financial’s growth strategy, First Financial routinely evaluates opportunities to acquire financial institutions. The acquisition of TB&T and its wholly owned subsidiary The Bank & Trust is consistent with First Financial’s expansion strategy. First Financial’s board of directors, senior management and certain lenders reviewed the business, financial condition, results of operation and prospects for The Bank & Trust, the market condition of the market area in which The Bank & Trust conducts business, the compatibility of the management and the proposed financial terms of the transaction. In addition, management of First Financial believes that the transaction will expand First Financial’s footprint in Central Texas and the markets surrounding Bryan/College Station, provide opportunities for future growth, and provide the potential to realize cost savings. First Financial’s board of directors also considered the financial condition and valuation for both TB&T and First Financial as well as the financial and other effects the transaction would have on First Financial’s shareholders.

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While management of First Financial believes that revenue opportunities will be achieved and costs savings will be obtained following the transaction, First Financial has not quantified the amount of enhancements or projected the areas of operation in which such enhancements will occur.

In view of the variety of factors considered in connection with its evaluation of the transaction, the First Financial board did not find it useful to and did not attempt to quantify, rank or otherwise assign relative weights to factors it considered. Further, individual directors may have given differing weights to different factors. In addition, the First Financial board did not undertake to make any specific determination as to whether any particular factor, or any aspect of any particular factor, was favorable or unfavorable to its ultimate determination. Rather, the board conducted an overall analysis of the factors it considered material, including thorough discussions with, and questioning of, First Financial’s management.

Effective Time of the Merger

The merger will become effective at the date and time specified in the certificate of merger to be filed with the Secretary of State of the State of Texas regarding the merger. If the shareholders of TB&T approve the merger pursuant to the reorganization agreement at the special meeting, and if all required regulatory approvals are obtained and the other conditions to the parties’ obligations to effect the merger are met or waived by the party entitled to do so, we anticipate that the merger will be completed in the first quarter of 2020, although delays could occur. We cannot assure you that we can obtain the necessary shareholder and regulatory approvals or that the other conditions to completion of the merger set forth in the reorganization agreement can or will be satisfied.

Conversion; Exchange of TB&T Stock Certificates

The conversion of TB&T common stock into the right to receive the merger consideration will occur automatically at the effective time of the merger. After completion of the merger, the exchange agent will exchange certificates representing shares of TB&T common stock for the merger consideration to be received pursuant to the terms of the reorganization agreement.

Letter of Transmittal; Dividends

At or promptly after the effective time of the merger, First Financial will deposit with or make available to the exchange agent shares of First Financial common stock to be exchanged for shares of TB&T common stock in accordance with the reorganization agreement and any cash payable in lieu of fractional shares (the “Exchange Fund”). With the intent to be within five days of the effective time of the merger, First Financial will cause the exchange agent to mail to each record holder of TB&T common stock a letter of transmittal and instructions describing the procedures for surrendering stock certificates representing shares of TB&T common stock in exchange for shares of First Financial common stock. The shares of First Financial common stock issuable in exchange for the shares of TB&T common stock will be issued in uncertificated book-entry form. Please do not send the exchange agent any stock certificates until you receive these instructions and the letter of transmittal. Stock certificates delivered to the exchange agent without a properly completed letter of transmittal will be rejected and returned for corrective action.

Until surrendered in accordance with the instructions of the exchange agent, other than shares of TB&T common stock subject to the exercise of dissenters’ rights, each stock certificate representing shares of TB&T common stock will represent after the effective time of the merger only the right to receive, without interest, the merger consideration and any cash in lieu of a fractional share of First Financial common stock to be issued or paid upon surrender of such stock certificate and any dividends or distributions to which such holder is entitled pursuant to the reorganization agreement. Subject to the terms of the reorganization agreement, each record holder of TB&T common stock will generally be entitled to receive without interest, the amount of dividends or other distributions with a record date after the effective time of the merger that are payable with respect to whole shares of First Financial common stock.

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Any portion of the Exchange Fund that remains unclaimed by the shareholders of TB&T at the expiration of six months after the effective time of the merger will be paid to First Financial. In such event, any former shareholders of TB&T who have not previously complied with exchange procedures set forth in the reorganization agreement and instructions from the exchange agent will look only to First Financial with respect to the merger consideration, any cash in lieu of any fractional shares and any unpaid dividends and distributions on the First Financial common stock as determined pursuant to the reorganization agreement, in each case, without any interest.

Lost Certificates

If any certificate representing shares of TB&T common stock is lost, stolen or destroyed, upon the making of an affidavit of such fact by the person claiming the certificate to be lost, stolen or destroyed and, if required by First Financial or the exchange agent, the posting by such person of a bond in such amount as the exchange agent may determine is reasonably necessary as indemnity against any claim that may be made against it with respect to such certificate, the exchange agent will issue in exchange for the lost, stolen or destroyed certificate the merger consideration, cash in lieu of fractional shares and any dividends or other distributions that have been payable or become payable in respect of the shares of First Financial common stock represented by that certificate pursuant to the reorganization agreement.

Withholding

First Financial and the exchange agent, as the case may be, will be entitled to deduct and withhold, if necessary, from any consideration payable pursuant to the reorganization agreement to any holder of TB&T common stock such amounts as First Financial or the exchange agent is required to deduct or withhold under applicable tax laws, and any such withheld amounts that are paid to the appropriate taxing authorities will be treated for purposes of the reorganization agreement as having been paid to the holder of TB&T common stock from whom such amounts were deducted or withheld.

Fractional Shares

First Financial will not issue any fractional shares of First Financial common stock in the merger. TB&T shareholders who would otherwise be entitled to a fraction of a share of First Financial common stock upon the completion of the merger will instead receive, for the fraction of a share, an amount in cash (rounded to the nearest cent), determined by multiplying the fractional share by $30.28, without interest.

Representations and Warranties of TB&T and First Financial

The reorganization agreement and this summary of the representations and warranties in this section are included to provide you with information regarding the terms of the reorganization agreement. Factual disclosures about First Financial and TB&T contained in this proxy statement/prospectus or in the public reports of First Financial filed with the SEC may supplement, update or modify the factual disclosures about First Financial and TB&T contained in the reorganization agreement. The reorganization agreement contains representations and warranties of First Financial and TB&T that may be subject to limitations, qualifications or exceptions agreed upon by the parties, including being qualified by confidential disclosures, and may be subject to a contractual standard of materiality that differs from the materiality standard that applies to reports and documents filed with the SEC. In particular, in your review of the representations and warranties contained in the reorganization agreement and described in this summary, it is important to bear in mind that the representations and warranties were negotiated with the principal purpose of establishing circumstances in which a party to the reorganization agreement may have the right not to consummate the merger if the representations and warranties of the other party prove to be untrue due to a change in circumstance or otherwise, and allocating risk between the parties to the reorganization agreement. The representations and warranties, other provisions of the reorganization agreement or any description of these provisions should not be read alone, but instead should be

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read only in conjunction with the information provided elsewhere in this proxy statement/prospectus, the documents incorporated by reference into this proxy statement/prospectus and the other reports, statements and filings that First Financial publicly files with the SEC. See “Where You Can Find More Information.”

The reorganization agreement contains customary representations and warranties of each of First Financial and TB&T relating to their respective businesses. The representations and warranties in the reorganization agreement do not survive the effective time.

The reorganization agreement contains representations and warranties made by TB&T relating to a number of matters, including the following:

• corporate matters, including due organization and qualification and subsidiaries;

• authority relative to execution and delivery of the reorganization agreement;

• capitalization;

• compliance with laws;

• the absence of conflicts with, or violations of, organizational documents or other obligations as a result of the merger;

• financial statements;

• the absence of undisclosed liabilities;

• legal proceedings;

• consents and approvals, required governmental and other regulatory filings in connection with the merger;

• title to assets;

• the absence of certain changes or events;

• certain contracts;

• certain tax matters;

• insurance matters;

• the absence of any material adverse change;

• intellectual property;

• related party transactions;

• validity and enforceability of debt instruments;

• condition of assets;

• environmental matters;

• regulatory compliance;

• absence of certain business practices;

• books and records;

• forms of instruments;

• fiduciary responsibilities;

• guaranties;

• voting agreements and shareholders’ agreements;

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• employment matters;

• employee benefits;

• certain obligations to employees;

• interest rate risk management;

• internal controls;

• compliance with the various specified statutes, rules and regulations;

• the accuracy of information supplied for inclusion in this proxy statement/prospectus and other similar documents;

• intercompany agreements;

• the nature of the representations in the reorganization agreement;

• inapplicability of takeover statutes; and

• receipt by the TB&T’s board of directors of an opinion from TB&T’s financial advisor.

The reorganization agreement contains representations and warranties made by First Financial relating to a more limited number of matters, including the following:

• corporate matters, including due organization and qualification and subsidiaries;

• authority relative to execution and delivery of the reorganization agreement;

• capitalization;

• filings with the SEC, certain compliance matters and financial statements;

• compliance with laws; and the absence of conflicts with, or violations of, organizational documents or other obligations as a result of the merger;

• the absence of undisclosed liabilities;

• legal proceedings;

• consents and approvals, required governmental and other regulatory filings in connection with the merger;

• regulatory compliance;

• the accuracy of information supplied for inclusion in this proxy statement/prospectus and other similar documents;

• the absence of certain changes or events;

• disclosure controls and procedures;

• certain tax matters;

• employee benefits; and

• the nature of the representations in the reorganization agreement.

Certain representations and warranties of First Financial and TB&T are qualified as to “materiality” or “material adverse change.” For purposes of the reorganization agreement, a “material adverse change” means, with respect to either First Financial or TB&T, any event, occurrence, fact, condition, effect or change that is, or would reasonably expect to become, materially adverse to the business, results of operations, condition (financial or otherwise), assets, properties, liabilities (absolute, accrued, contingent or otherwise) or reserves, taken as a

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whole, or the ability of the parties to consummate the transactions contemplated by the reorganization agreement on a timely basis; provided, however, that none of the following shall constitute, or shall be considered in determining whether there has occurred, and no event, circumstance, change or effect resulting from or arising out of any of the following shall constitute a material adverse change: (i) any changes in laws or interpretations thereof that are generally applicable to the banking or savings industries; (ii) changes in GAAP or regulatory accounting principles, which we refer to as “RAP,” that are generally applicable to the banking or savings industries; (iii) expenses incurred in connection with the transactions contemplated by the reorganization agreement; (iv) changes in global, national or regional political conditions or general economic or market conditions in the United States or the State of Texas, including changes in prevailing interest rates, credit availability and liquidity, currency exchange rates, and price levels or trading volumes in the United States or foreign securities markets affecting other companies in the financial services industry; (v) general changes in the credit markets or general downgrades in the credit markets; (vi) actions or omissions of a party taken as required by the reorganization agreement or with the prior informed written consent of the other party or parties in contemplation of the transactions contemplated by the reorganization agreement; (vii) any outbreak or escalation of hostilities, declared or undeclared acts of war or terrorism; or (viii) any change resulting from the announcement or pendency of any of the transactions contemplated by the reorganization agreement; provided, however, that in the case of clauses (i) through (vii), such party is not affected to a greater extent than other persons, bank holding companies or insured depository institutions in the industry in which such party operates.

Covenants and Agreements

Conduct of Businesses Prior to the Completion of the Merger

From the date of the reorganization agreement to and including the closing date of the merger, unless otherwise permitted in writing by First Financial, TB&T will, and will cause The Bank & Trust to:

• operate (including, without limitation, the making of, or agreeing to make, any loans or other extensions of credit) only in the ordinary course of business and consistent with past practices and safe and sound banking principles;

• except as required by prudent business practices, use commercially reasonable efforts to preserve its business organization intact and to retain its present directors, officers, employees, key personnel and customers, depositors and goodwill and to maintain all assets owned, leased or used by it (whether under its control or the control of others), in good operating condition and repair, ordinary wear and tear excepted;

• perform all of its obligations under any material contracts, leases and documents relating to or affecting its assets, properties and business, except such obligations as TB&T or any of its subsidiaries may in good faith reasonably dispute;

• maintain in full force and effect all insurance policies now in effect or renewals thereof and give all notices and present all claims under all insurance policies in due and timely fashion;

• timely file, subject to extensions, all reports required to be filed with any governmental entity and observe and conform, in all material respects, to all applicable laws, except those being contested in good faith by appropriate proceedings;

• timely file, subject to extensions, all tax returns required to be filed by it and timely pay all taxes that become due and payable, except those being contested in good faith by appropriate proceedings;

• promptly notify First Financial of any tax proceeding or claim pending or threatened against or with respect to TB&T or any of its subsidiaries;

• withhold from each payment made to each of its employees, independent contractors, creditors and other third parties the amount of all taxes required to be withheld therefrom and pay the same to the proper governmental entity when due;

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• account for all transactions and prepare all financial statements in accordance with GAAP (unless otherwise instructed by RAP in which instance account for such transaction in accordance with RAP);

• promptly classify and charge off loans and make appropriate adjustments to loss reserves in accordance with GAAP, RAP and the instructions to the Call Report and the Uniform Retail Credit Classification and Account Management Policy;

• maintain the allowance for loan and lease losses account in an amount adequate in all material respects to provide for all losses, net of recoveries relating to loans previously charged off, on all outstanding loans and in compliance with applicable regulatory requirements;

• pay or accrue all costs, expenses and other charges to be incurred in connection with the merger, including, but not limited to, all legal fees, accounting fees, consulting fees and brokerage fees, prior to the calculation date (the fifth business day immediately preceding the closing date); and

• ensure that all accruals for taxes are accounted for in the ordinary course of business, consistent with past practices and in accordance with its GAAP (unless otherwise instructed by RAP in which case such accrual will be accounted for in accordance with RAP).

From the date of the reorganization agreement to closing, unless permitted by the reorganization agreement or First Financial consents in writing, TB&T will not, and will not allow The Bank & Trust to:

• take or fail to take any action that would cause the representations and warranties made by TB&T to be inaccurate at the time of the closing or preclude TB&T from making such representations and warranties at the time of the closing;

• merge into, consolidate with or sell its assets to any other person or entity, change or amend TB&T’s or any of its subsidiaries’ articles of incorporation or bylaws, increase the number of shares of common stock of TB&T (other than by exercise of options or warrants that were outstanding as of the signing of the reorganization agreement) or any of its subsidiaries’ stock outstanding or increase the amount of the The Bank & Trust’s surplus (as calculated in accordance with the instructions to the Call Report);

• except as explicitly permitted under the reorganization agreement or in accordance with applicable law or pursuant to a contract existing as of the date of the reorganization agreement, engage in any transaction with any affiliated person or allow such persons to acquire any assets from TB&T or any of its subsidiaries, except (i) in the form of wages, salaries, fees for services, reimbursement of expenses and benefits already granted or accrued under the employee plans in effect at the signing of the reorganization agreement, or (ii) any deposit (in any amount) made by an officer, director or employee;

• except for the payment of the special dividend in connection with the closing of the merger, declare, set aside or pay any dividends or make any other distribution to its shareholders (including any share dividend, dividends in kind or other distribution) whether in cash, shares or other property or purchase, retire or redeem, or obligate itself to purchase, retire or redeem, any of its capital shares or other securities;

• discharge or satisfy any lien or pay any obligation or liability, whether absolute or contingent, due or to become due, except in the ordinary course of business consistent with past practices and except for liabilities incurred in connection with the transactions contemplated hereby;

• issue, reserve for issuance, grant, sell or authorize the issuance of any shares of its capital stock or other securities or subscriptions, options, warrants, calls, rights or commitments of any kind relating to the issuance thereto;

• accelerate the vesting of pension or other benefits in favor of employees of TB&T or any of its subsidiaries except according to the employee plans or as otherwise contemplated by the reorganization agreement or as required by applicable law;

• acquire any capital stock or other equity securities or acquire any equity or ownership interest in any bank, corporation, partnership or other entity (except (i) through settlement of indebtedness,

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foreclosure, or the exercise of creditors’ remedies or (ii) in a fiduciary capacity, the ownership of which does not expose it to any liability from the business, operations or liabilities of such Person);

• mortgage, pledge or subject to lien any of its property, business or assets, tangible or intangible, except (i) certain permitted encumbrances and (ii) pledges of assets to secure public funds deposits;

• except for sales of investment securities in the ordinary course of business, sell, transfer, lease to others or otherwise dispose of any of its assets, or cancel or compromise any debt or claim, or waive or release any right or claim of a market value in excess of $50,000;

• except for certain payments contemplated by the reorganization agreement, make any change in the rate or timing of payment of compensation, commission, bonus or other direct or indirect remuneration payable, or pay or agree or orally promise to pay, conditionally or otherwise, any bonus, extra compensation, pension or severance or vacation pay, to or for the benefit of any of its shareholders, directors, officers, employees or agents, other than annual increases in compensation consistent with past practices, and bonuses, commissions, and incentives consistent with past and normal practices to its employees and officers;

• except for certain payments contemplated by the reorganization agreement, enter into any employment or consulting contract (other than as contemplated by the terms of the employee plans or the reorganization agreement) or other agreement with any current or proposed director, officer or employee or adopt, amend any employment agreement, amend in any material respect or terminate any pension, employee welfare, retirement, stock purchase, stock option, phantom stock, stock appreciation rights, termination, severance, income protection, golden parachute, savings or profit-sharing plan (including trust agreements and insurance contracts embodying such plans), any deferred compensation, or collective bargaining agreement, any group insurance contract or any other incentive, welfare or employee benefit plan or agreement for the benefit of its directors, employees or former employees, except as required by applicable law or the reorganization agreement;

• make any capital expenditures or capital additions or betterments except for such capital expenditures or capital additions that are set forth in writing in the budget provided to First Financial or that are necessary to prevent substantial deterioration of the condition of a property;

• sell or dispose of, or otherwise divest itself of the ownership, possession, custody or control, of any corporate books or records of any nature that, in accordance with sound business practice, normally are retained for a period of time after their use, creation or receipt, except at the end of the normal retention period;

• make any, or acquiesce with any, change in any (i) credit underwriting standards or practices, including loan loss reserves, (ii) asset liability management techniques, (iii) accounting methods, principles or practices, except as required by changes in GAAP as concurred by TB&T’s independent auditors, or as required by any applicable regulatory agency, (iv) tax election, change in taxable year, accounting methods for tax purposes, amendment of a tax return, restriction on any assessment period relating to taxes, settlement of any tax claim or assessment relating to TB&T or any of its subsidiaries, “closing agreement” within the meaning of Section 7121 of the Code (or any similar provision of state, local or foreign law), or surrender any claim to a refund, or (v) any extension or waiver of the limitation period applicable to any tax claim or assessment relating to TB&T or its subsidiaries;

• reduce the amount of The Bank & Trust’s allowance for loan losses except through charge offs;

• purchase any investment securities, other than purchases of obligations of the U.S. Treasury (or any agency thereof) with a duration of four (4) years or less and an AA rating by at least one nationally recognized ratings agency;

• renew, extend the maturity of, or alter any of the terms of any loan classified by TB&T as “special mention,” “substandard,” or “impaired” or other words of similar import;

• enter into any acquisitions or leases of real property, including new leases and lease extensions.

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For a complete description of such restrictions on the conduct of the business of TB&T, we refer you to the reorganization agreement, which is attached asAppendix Ato this proxy statement/prospectus.

Regulatory Matters

First Financial and TB&T have agreed to use their commercially reasonable efforts to promptly prepare and file or cause to be filed applications for all regulatory approvals required to be obtained by each of the parties in connection with the reorganization agreement and the transactions contemplated thereby.

Employee Matters

Subject to the right of subsequent amendment, modification, replacement or termination in the sole discretion of First Financial, each former employee of The Bank & Trust that becomes employed by First Financial or its subsidiaries after the effective time of the merger shall be entitled, as an employee of First Financial or its subsidiaries, to participate in the employee benefit plans of First Financial in effect as of the date of the reorganization agreement; provided, that such continuing employee is eligible to participate and, if required, selected for participation therein under the terms thereof and makes any required contributions. All such participation shall be subject to such terms of such plans as may be in effect from time to time and the reorganization agreement is not intended to give any such employee any rights or privileges superior to those of other similarly situated employees of First Financial or its subsidiaries. The provisions of the reorganization agreement shall not be deemed or construed so as to provide duplication of similar benefits but, subject to that qualification, First Financial shall, for purposes of vesting and any age or period of service requirements for commencement of participation with respect to any employee benefit plans in which a continuing employee may participate (excluding any defined benefit pension plan), credit each continuing employee with his or her term of service with TB&T or The Bank & Trust to the extent such service was recognized under the analogous employee benefit plan of TB&T.

Director and Officer Indemnification and Insurance

The reorganization agreement provides that for a three year period after the effective time of the merger, and subject to the limitations contained in applicable Federal Reserve, OCC and FDIC regulations and to any limitations contained in the TB&T governance documents, First Financial will indemnify, defend and hold harmless each director and officer of TB&T or The Bank & Trust as of the effective time of the merger, against any costs or expenses (including reasonable attorneys’ fees), judgments, fines, losses, claims, damages or liabilities incurred in connection with any claim, action, suit, proceeding or investigation, whether civil, criminal, administrative or investigative, arising out of matters existing or occurring at or before the effective time of the merger, whether asserted or claimed before, at or after the effective time of the merger that arise in whole or in part out of or pertaining to the fact that he or she was acting in his or her capacity as a director or officer of the TB&T or The Bank & Trust.

Prior to closing, TB&T will obtain an extended reporting period policy, with terms and coverage reasonable for such policies, covering directors and officers of TB&T and The Bank & Trust for a period of not less than three (3) years from the closing date.

No Solicitation

TB&T agreed that neither it, nor The Bank & Trust, nor any of their respective directors or officers will take any action to:

• initiate, solicit, encourage or otherwise facilitate any inquiries, provide any information to or negotiate with any other party any proposal or offer that constitutes, or may reasonably be expected to lead to an acquisition proposal;

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• enter into or maintain or continue discussions or negotiate with any person in furtherance of such inquiries or to obtain an acquisition proposal; or

• agree to, approve, recommend, or endorse any acquisition proposal, or authorize or permit any of its or their directors or officers to take any such action.

TB&T has agreed to notify First Financial orally (within one business day) and in writing (as promptly as practicable) of any such inquiries and proposals received by TB&T or The Bank & Trust or any of its respective directors or officers, relating to any of such matters.

For purposes of the reorganization agreement, an acquisition proposal is any proposal involving: (a) a merger, consolidation, or any similar transaction of any entity with TB&T or any subsidiary of TB&T, (b) a purchase, lease or other acquisition of all or substantially all the assets of TB&T or any subsidiary of TB&T, (c) a purchase or other acquisition of “beneficial ownership” by any “person” or “group” (as such terms are defined in Section 13(d)(3) of Exchange Act) (including by way of merger, consolidation, share exchange, or otherwise) that would cause such person or group to become the beneficial owner of any securities of TB&T or any subsidiary of TB&T after September 19, 2019, (d) a tender or exchange offer to acquire any securities of TB&T or any subsidiary of TB&T, (e) a public proxy or consent solicitation made to the shareholders of TB&T or any subsidiary of TB&T seeking proxies in opposition to any proposal relating to any of the transactions contemplated by the reorganization agreement, or (f) the making of a bona fide offer or proposal to the board of directors or shareholders of TB&T or any subsidiary of TB&T to engage in one or more of the transactions referenced above.

TB&T Option Vesting, Exercise and Cancellation

The reorganization agreement requires that in advance of the closing of the merger, the board of directors of TB&T (or, if appropriate, a committee thereof) take all necessary actions to cause the vesting of any unvested options to purchase TB&T common stock granted pursuant to the TB&T equity incentive plan. In this regard, effective as of October 1, 2019, the TB&T board of directors accelerated the vesting of all outstanding options to purchase TB&T common stock. In addition, under the terms of the reorganization agreement, TB&T has agreed to use its commercially reasonable efforts to cause all holders of options to purchase common stock of TB&T to exercise such options prior to the closing of the merger. The reorganization agreement also requires that TB&T terminate and cancel all options to purchase common stock of TB&T that are not exercised in the time frame specified by the reorganization agreement.

TB&T Warrant Exercise and Cancellation

The reorganization agreement requires TB&T to use its commercially reasonable efforts to cause all holders of warrants to purchase TB&T common stock to exercise such warrants prior to the closing of the merger. By the terms of the warrant agreements, all outstanding warrants to purchase shares of TB&T common stock will expire on December 31, 2019.

Repayment of Certain Loans Secured by Stock of The Bank & Trust

The reorganization agreement requires that prior to closing of the merger, TB&T shall take all actions necessary to repay all indebtedness owed under a certain line of credit and to cause any security interest, pledge, lien or other encumbrance on the capital stock of The Bank & Trust to be removed, released and terminated.

Certain Additional Covenants

The reorganization agreement also contains additional covenants, including, among others, covenants relating to efforts to perform and fulfill all conditions and obligations under the reorganization agreement,

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holding the special meeting, the recommendation of the board of directors of TB&T, the filing and preparation of this joint proxy statement/prospectus, due diligence and access to the information, properties and personnel of TB&T and The Bank & Trust, financial statements, breaches of representations, warranties and covenants, notices relating to litigation, notices relating to the occurrence of a material change, obtaining required consents and approvals, environmental due diligence and investigations, the termination of certain employee benefit plans, the termination of certain contracts, tax matters, supplemental disclosure schedules, assistance with planning the integration of the operations of TB&T and First Financial, the absence of control over the other party’s business, voting agreements, director support agreements, director and officer releases, and the listing of the shares of First Financial common stock to be issued in the merger.

Conditions to Completion of the Merger

The reorganization agreement contains a number of conditions to the obligations of First Financial and TB&T to complete the merger which must be satisfied as of the closing date of the merger.

TB&T’s obligations to complete the merger are subject to the satisfaction or waiver of the following conditions:

• subject to certain materiality and material adverse change exceptions, each of the representations and warranties of First Financial set forth in the reorganization agreement will be true and correct in all respects at and as of the date of the reorganization agreement and at and as of the closing date as though made at and as of the closing date (unless any such representation or warranty is made only as of a specific date, in which case as of such specific date);

• First Financial and Merger Sub have, or have caused to be, performed or observed, in all material respects, all obligations and agreements required to be performed or observed by First Financial and Merger Sub under the reorganization agreement on or prior to the closing date;

• the merger proposal having been approved by the requisite vote of TB&T’s shareholders;

• TB&T and First Financial having received approvals, acquiescences or consents of the transactions contemplated by the reorganization agreement from all necessary governmental entities and certain the third parties, and all applicable waiting periods having expired; and such approvals and the transactions contemplated by the reorganization agreement not having been contested or threatened to be contested by any federal or state governmental entity or by any other third party by formal proceedings;

• no action having been taken, and no statute, rule, regulation or order being promulgated, enacted, entered, enforced or deemed applicable to the reorganization agreement or the transactions contemplated thereby by any federal, state or foreign government or governmental entity or by any court, including the entry of a preliminary or permanent injunction, which, if successful, would (a) make the reorganization agreement or any other agreement contemplated thereby, or the transactions contemplated thereby illegal, invalid or unenforceable, (b) impose material limits on the ability of any party to the reorganization agreement to complete the reorganization agreement or any other agreement contemplated thereby, or the transactions contemplated thereby, or (c) if the reorganization agreement or any other agreement contemplated thereby, or the transactions contemplated thereby are completed, subject TB&T or any officer, director, shareholder or employee of TB&T to criminal or civil liability. Further, no action or proceeding before any court or governmental entity, by any government or governmental entity or by any other person is threatened, instituted or pending that would reasonably be expected to result in any of the consequences described above;

• TB&T shall have received all documents required to be received from First Financial on or prior to the closing date in form and substance reasonably satisfactory to TB&T;

• there having been no material adverse change with respect to First Financial since September 19, 2019;

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• the registration statement of which this proxy statement/prospectus is a part, including any amendments or supplements thereto, shall be effective under the Securities Act of 1933, as amended, referred to in this proxy statement/prospectus as the “Securities Act,” and no stop order suspending the effectiveness of the registration statement shall be in effect or proceedings for such purpose pending before or threatened by the SEC. All state securities permits or approvals required by applicable state securities laws to consummate the transactions contemplated by the reorganization agreement shall have been received and remain in effect;

• the shares of First Financial Stock to be issued pursuant to the reorganization agreement shall have been approved for listing on the NASDAQ Global Select Market; and

• TB&T will have received from Fenimore, Kay, Harrison & Ford, LLP an opinion to the effect that the integrated mergers should qualify as a “reorganization” within the meaning of Section 368(a) of the Code.

First Financial’s obligations to complete the merger are subject to the satisfaction or waiver of the following conditions:

• subject to certain materiality and material adverse change exceptions, each of the representations and warranties of TB&T set forth in the reorganization agreement will be true and correct in all respects at and as of the date of the reorganization agreement and at and as of the closing date as though made at and as of the closing date (unless any such representation or warranty is made only as of a specific date, in which case as of such specific date);

• TB&T has, or has caused to be, performed or observed, in all material respects, all obligations and agreements required to be performed or observed by TB&T under the reorganization agreement on or prior to the closing date;

• the merger proposal having been approved by the requisite vote of TB&T’s shareholders;

• TB&T and First Financial having received approvals, acquiescences or consents of the transactions contemplated by the reorganization agreement from all necessary governmental entities and certain the third parties, and all applicable waiting periods having expired; and such approvals and the transactions contemplated by the reorganization agreement not having been contested or threatened to be contested by any federal or state governmental entity or by any other third party by formal proceedings;

• no action having been taken, and no statute, rule, regulation or order being promulgated, enacted, entered, enforced or deemed applicable to the reorganization agreement or the transactions contemplated thereby by any federal, state or foreign government or governmental entity or by any court, including the entry of a preliminary or permanent injunction, which, if successful, would (a) make the reorganization agreement or any other agreement contemplated thereby, or the transactions contemplated thereby illegal, invalid or unenforceable, (b) impose material limits on the ability of any party to the reorganization agreement to complete the reorganization agreement or any other agreement contemplated thereby, or the transactions contemplated thereby, or (c) if the reorganization agreement or any other agreement contemplated thereby, or the transactions contemplated thereby are completed, subject First Financial or any officer, director, shareholder or employee of First Financial to criminal or civil liability. Further, no action or proceeding before any court or governmental entity, by any government or governmental entity or by any other person is threatened, instituted or pending that would reasonably be expected to result in any of the consequences described above;

• First Financial having received from each of the directors of TB&T an instrument dated as of the closing date releasing TB&T, its subsidiaries and each of its affiliates, successors and assigns, from any and all claims of such directors (except to certain matters described therein). Further, First Financial having received from each of the specified officers of TB&T an instrument dated as of the closing date releasing TB&T, its subsidiaries and each of its affiliates, successors and assigns, from any and all claims of such officers;

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• there having been no material adverse change with respect to TB&T since September 19, 2019;

• First Financial having received evidence reasonably satisfactory to it that, as of the effective time of the merger, all employee plans of TB&T (other than such plans First Financial elects not to terminate) have been terminated in accordance with the terms of such employee plans of TB&T, the Code, ERISA and all other applicable laws on a basis satisfactory to First Financial in its reasonable discretion and that, to the extent required by the employee plans or applicable law, affected participants have been notified of such terminations and/or integrations;

• the voting agreements of any TB&T shareholders providing that such shareholders will approve the merger proposal remaining in full force and effect, and the TB&T shareholders party thereto not being in material breach of such voting agreements;

• the support agreements of each TB&T director remaining in full force and effect, and no director being in material breach of such support agreements;

• First Financial will have received fully executed employment agreements from TB&T for certain employees of The Bank & Trust;

• the registration statement of which this proxy statement/prospectus is a part, including any amendments or supplements thereto, shall be effective under the Securities Act and no stop order suspending the effectiveness of the registration statement shall be in effect or proceedings for such purpose pending before or threatened by the SEC. All state securities permits or approvals required by applicable state securities laws to consummate the transactions contemplated by the reorganization agreement shall have been received and remain in effect; and

• holders of not more than 5% of the outstanding shares of TB&T common stock having duly exercised their appraisal rights under the TBOC;

• First Financial will have received all documents required to be received from TB&T on or prior to the closing date, all in form and substance reasonably satisfactory to First Financial;

• each holder of an option to purchase common stock of TB&T shall have exercised such option or TB&T has compensated in cash such holder of an option to purchase common stock of TB&T for the termination and cancellation of such option prior to the closing date and TB&T shall have terminated and cancelled all options to purchase common stock of TB&T as of the closing date;

• First Financial will have received from TB&T certain tax documents in form and substance satisfactory to First Financial, dated as of the closing date and executed by TB&T;

• First Financial will have received from Norton Rose Fulbright US LLP an opinion to the effect that the integrated mergers should qualify as a “reorganization” within the meaning of Section 368(a) of the Code;

• TB&T shall have taken all actions required to repay all indebtedness owed pursuant to a certain line of credit, and any security interest, pledge, lien or other encumbrance on the capital stock of The Bank & Trust shall have been removed, released and terminated; and

• each holder of a warrant to acquire TB&T common stock shall have exercised (or elected to not exercise, in which case such warrant will be cancelled) such warrant prior to the closing date.

Any condition to the completion of the merger, except the required shareholder and regulatory approvals, and the absence of an order or ruling prohibiting the merger, may be waived in writing by the party to the reorganization agreement entitled to the benefit of such condition. We cannot be certain when or if the conditions to the merger will be satisfied or waived, or that the merger will be completed.

Interests of TB&T’s Directors and Officers in the Merger

In considering the recommendation of the board of directors of TB&T with respect to the merger proposal, you should be aware that some of TB&T’s directors and executive officers may have interests in the merger that

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are different from, or in addition to, the interests of the TB&T shareholders generally. Interests of directors and executive officers that may be different from or in addition to the interests of the TB&T shareholders include:

• Indemnification and Insurance. First Financial has agreed to indemnify the directors and officers of TB&T against certain liabilities arising before the effective time of the merger and TB&T is paying to provide certain “tail” insurance for the benefit of the directors and officers of TB&T.

• Employment Agreements. First Financial Bank has entered into employment agreements to be effective as of the effective time of the merger with, among other employees of The Bank & Trust, Timothy N. Bryan, Ivan M. Olson Jerry E. Fox and Michael A. Holmgreen. Among other matters, such employment agreements provide that each of Messrs. Bryan, Olson, Fox and Holmgreen may be entitled to receive retention payments if he remains employed with First Financial Bank as of the first and second anniversaries of the closing of the merger. Pursuant to these employment agreements, Messrs. Bryan, Olson, Fox and Holmgreen are expected to receive compensation following the merger for their continued service to First Financial Bank at substantially the same level as compared to their respective compensation with The Bank & Trust.

• Employee Benefit Plans. On or as soon as reasonably practicable following the merger, employees of TB&T who continue on as employees of First Financial will be entitled to participate in the First Financial health and welfare benefit and similar plans on the same terms and conditions as employees of First Financial. Subject to certain exceptions, these employees will receive credit for their years of service to TB&T or The Bank & Trust for participation, vesting and benefit accrual purposes.

• Retention Payments. Upon the closing of the merger, TB&T will pay retention bonuses totaling $3.0 million in the aggregate to certain key personnel of TB&T and The Bank & Trust to remain employed with the combined organization following the consummation of the merger.

Director Support Agreements

In connection with entering into the reorganization agreement, each of the directors of TB&T entered into a director support agreement with First Financial pursuant to which they agreed to refrain from harming the goodwill of TB&T and to certain post-closing restrictive covenants.

The foregoing description of the director support agreement is subject to, and qualified in its entirety by reference to, the director support agreement, a form of which is attached to this proxy statement/prospectus asAppendix C and is incorporated by reference into this proxy statement/prospectus.

NASDAQ Listing

First Financial agreed to file with NASDAQ Global Select Market all documents with respect to the listing of the shares of First Financial common stock to be issued in the merger.

Amendment or Waiver of the Reorganization Agreement

No termination, cancellation, modification, amendment, deletion, addition or other change to the reorganization agreement, or any provision thereof, or waiver of any right or remedy therein provided, is effective for any purpose unless specifically set forth in a writing executed by the party against which enforcement of the amendment, modification or supplement is sough. The waiver of any right or remedy in respect to any occurrence or event on one occasion is not deemed a waiver of such right or remedy in respect to such occurrence or event on any other occasion.

The reorganization agreement may be amended at any time prior to or after approval of the merger proposal by the shareholders of TB&T but, after any submission of the reorganization agreement to such shareholders for approval, no amendment of the reorganization agreement will be made that reduces the consideration payable to TB&T or that materially and adversely affects the rights of shareholders of TB&T under the reorganization agreement without the requisite approval of such shareholders.

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Termination of the Reorganization Agreement

The reorganization agreement can be terminated at any time prior to completion of the merger in the following circumstances:

• by the mutual written consent of First Financial and TB&T;

• by either TB&T or First Financial (as long as the terminating party is not in material breach of any representation, warranty, covenant or other agreement contained in the reorganization agreement) if the conditions precedent to such party’s obligations to close have not been met or waived by May 15, 2020; provided, however, that such date may be extended to such later date as agreed upon by TB&T and First Financial;

• by either First Financial or TB&T if any of the transactions contemplated by the reorganization agreement are disapproved by any regulatory agency or authority whose approval is required to complete such transactions or if any court of competent jurisdiction in the United States or other federal or state governmental entity has issued an order, decree or ruling or taken any other action restraining, enjoining, invalidating or otherwise prohibiting the reorganization agreement or the transactions contemplated thereby and such disapproval, order, decree, ruling or other action is final and nonappealable; provided, however, that the party seeking to terminate the reorganization agreement for this reason is required to use its commercially reasonable efforts to contest, appeal and remove such order, decree, ruling or other action;

• by either First Financial or TB&T if it reasonably determines, in good faith and after consulting with counsel, there is substantial likelihood that any necessary regulatory approval will not be obtained or will be obtained only upon a condition or conditions that could reasonably be expected to be materially burdensome on, or materially impair the anticipated benefits of the merger to, First Financial and its subsidiaries and affiliates, taken as a whole;

• by either First Financial or TB&T if there has been any material adverse change with respect to the other party;

• subject to certain cure rights, by First Financial or TB&T, if there shall have been a breach of any of the covenants or agreements or any of the representations or warranties (or any such representation or warranty shall cease to be true and correct) set forth in the reorganization agreement or any other agreement contemplated in the reorganization agreement on the part of the other party to the reorganization agreement, which breach or failure to be true and correct, either individually or in the aggregate with all other breaches (or inaccuracies of such representations and warranties), would constitute, if occurring or continuing on the closing date, the failure of a closing condition; provided, however, that the right to terminate the reorganization agreement for this reason shall not be available to a party if it is then in material breach of any of its representations, warranties, covenants or agreements set forth in the reorganization agreement;

• by First Financial or TB&T, if TB&T does not receive the required shareholder approval at the TB&T special meeting or any adjournment or postponement thereof; provided, that TB&T may only terminate the reorganization agreement for this reason if the board of directors of TB&T recommended that the shareholders of TB&T vote in favor of the approval merger proposal;

• by First Financial, if First Financial disapproves of the results of the certain environmental inspections, secondary investigation or other environmental survey conducted in accordance with the terms of the reorganization agreement;

• by First Financial if TB&T or The Bank & Trust enter into any formal or informal administrative action with a governmental entity or any such action is threatened by a governmental entity; and

• by First Financial, if (i) TB&T has mailed this proxy statement/prospectus to its shareholders and TB&T does not hold the special meeting within 60 days thereafter, (ii) the board of directors of TB&T

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fails to recommend that the TB&T shareholders vote in favor of approval of the merger proposal, or (iii) the individuals that executed a voting agreement or a director support agreement have violated the terms thereof.

Expenses

TB&T and First Financial will each pay their respective expenses incurred in connection with the preparation and performance of their respective obligations under the reorganization agreement, whether or not the transactions provided for in the reorganization agreement are completed, including, but not limited to, fees and expenses of their own counsel, financial or other consultants, investment bankers and accountants, and filing, registration, application and printing fees. Similarly, each of TB&T and First Financial agreed to indemnify the other party against any amounts owed to any agent, representative or broker of the other party.

Certain Material U.S. Federal Income Tax Consequences of the Integrated Mergers

The following discussion addresses certain material U.S. federal income tax consequences of the integrated mergers to U.S. holders (defined below) of shares of TB&T common stock that exchange their shares of TB&T common stock for shares of First Financial common stock in the integrated mergers or that exercise their dissenters’ rights. The following discussion is based on, and subject to, the Code, the Treasury regulations promulgated under the Code, court decisions, and administrative rulings, all of which are in effect as of the date hereof, and all of which are subject to change, possibly with retroactive effect and differing interpretations.

This is addressed to TB&T shareholders that hold TB&T common stock and will hold the First Financial common stock received in exchange for their TB&T common stock as a capital asset within the meaning of Section 1221 of the Code (generally assets held for investment). This discussion does not address all aspects of U.S. federal income taxation that may be applicable to TB&T shareholders in light of their particular circumstances or to TB&T shareholders subject to special treatment under U.S. federal income tax law, including, without limitation:

• shareholders who are not U.S. holders (as defined below);

• S corporations, partnerships or other pass-through entities (or investors in S corporations, partnerships or other pass-through entities);

• banks, thrifts, or other financial institutions;

• insurance companies;

• mutual funds;

• regulated investment companies;

• real estate investment trusts;

• retirement plans, individual retirement accounts or othertax-deferred accounts;

• holders of TB&T common stock subject to the alternative minimum tax provisions of the Code;

• tax-exempt organizations;

• controlled foreign corporations or passive foreign investment companies;

• brokers, banks or dealers in securities or currencies;

• traders in securities that elect to use amark-to-market method of accounting;

• persons whose functional currency is not the U.S. dollar;

• shareholders who hold their shares of TB&T common stock as part of a hedge, straddle, constructive sale, conversion or other integrated transaction;

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• shareholders who acquired their shares of TB&T common stock pursuant to the exercise of employee stock options or otherwise acquired shares as compensation or through atax-qualified retirement plan;

• persons subject to special tax accounting rules as a result of any item of gross income with respect to TB&T common stock being taken into account in an “applicable financial statement” (as defined in the Code); and

• United States expatriates or certain former citizens or long-term residents of the United States.

If a partnership or other entity or arrangement taxed as a partnership for U.S. federal income tax purposes holds shares of TB&T common stock, the tax treatment of a partner in the partnership will depend upon the status of the partner and the activities of the partner and partnership. The tax consequences to partnerships and partners in such partnerships are not addressed in this proxy statement/prospectus. Partnerships and partners in such partnerships should consult their own tax advisors about the tax consequences of the merger to them.

In addition, the discussion does not address any state, local or foreign tax consequences of the integrated mergers, nor does it address any U.S. federal tax consequences other than income tax (e.g., U.S. federal gift or estate taxes). Determining the actual tax consequences of the integrated mergers to you may be complex. They will depend on your specific situation and on factors that are not within the control of TB&T or First Financial. You should consult with your own tax advisor as to the tax consequences of the integrated mergers in your particular circumstances.

U.S. Holders

For purposes of this discussion, the term “U.S. holder” means a beneficial holder of TB&T common stock that is for United States federal income tax purposes:

• an individual citizen or resident of the U.S.;

• a corporation (including any entity treated as a corporation for U.S. federal income tax purposes) created or organized under the laws of the United States, any state thereof or the District of Columbia;

• a trust that (i) is subject to both the primary supervision of a court within the United States and the control of one or more U.S. persons; or (ii) has a valid election in effect under applicable U.S. Treasury regulations to be treated as a U.S. person; or

• an estate that is subject to U.S. federal income tax on its income regardless of its source.

DETERMINING THE ACTUAL U.S. FEDERAL INCOME TAX CONSEQUENCES OF THE INTEGRATED MERGERS TO A U.S. HOLDER MAY BE COMPLEX AND WILL DEPEND, IN PART, ON SUCH HOLDER’S PARTICULAR CIRCUMSTANCES. U.S. HOLDERS OF TB&T COMMON STOCK ARE URGED TO CONSULT WITH THEIR OWN TAX ADVISORS AS TO THE TAX CONSEQUENCES OF THE INTEGRATED MERGERS IN THEIR PARTICULAR CIRCUMSTANCES.

U.S. Federal Income Tax Consequences of the Integrated Mergers Generally

First Financial and TB&T intend that the integrated mergers will together be treated as a single transaction that qualifies as a “reorganization” within the meaning of Section 368(a) of the Code. The obligations of First Financial and TB&T to complete the integrated mergers is conditioned on, among other things, the receipt by First Financial of a tax opinion from Norton Rose Fulbright US LLP and by TB&T of a tax opinion from Fenimore, Kay, Harrison & Ford, LLP (which we refer to collectively as the “opinions”), each dated as of the closing date of the integrated mergers, to the effect that, on the basis of facts, representations and assumptions described or referenced in such opinions, the integrated mergers taken together will qualify as a “reorganization” within the meaning of Section 368(a) of the Code.

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The opinions will be based on certain customary assumptions, including the assumption that the integrated mergers will be completed in the manner set forth in the reorganization agreement and the registration statement on FormS-4 of which this proxy statement/prospectus is a part. The opinions also will be based on customary representations and warranties from First Financial and TB&T, as well as certain covenants and undertakings by First Financial and TB&T. If any of the assumptions, representations, warranties, covenants or undertakings is or becomes incorrect, incomplete, inaccurate or is violated, the validity of the opinions described above may be affected and the U.S. federal income tax consequences of the integrated mergers could differ materially from those described in this proxy statement/prospectus.

The opinions will not be binding on the IRS or any court. Neither First Financial nor TB&T intends to request any ruling from the IRS as to the U.S. federal income tax consequences of the integrated mergers. Accordingly, there can be no assurance that the IRS will not assert, and a court will not sustain, a position contrary to the position addressed below or in the opinions. The following discussion regarding the U.S. federal income tax consequences of the integrated mergers assumes that the integrated mergers will be treated as a “reorganization” within the meaning of Section 368(a) of the Code.

U.S. Federal Income Tax Consequences to U.S. Holders

Receipt of the Special Dividend

In connection with the integrated mergers, TB&T may distribute cash to the U.S. holders of TB&T common stock equal to the special dividend. Although the matter is not free from doubt, First Financial and TB&T intend to treat the special dividend as additional consideration received by a U.S. holder in exchange for such holder’s TB&T common stock with the U.S. federal income tax consequences described below under the heading “—Exchange of Shares of TB&T Common Stock for Shares of First Financial Common Stock and Special Dividend.”

Whether the IRS will agree with First Financial’s and TB&T’s federal income tax reporting of the special dividend is uncertain. Moreover, if the IRS were to challenge the federal income tax reporting by First Financial and TB&T of the special dividend, it is uncertain whether a court would sustain First Financial’s and TB&T’s reporting position. If the IRS treats the cash distributed by TB&T to U.S. holders of TB&T common stock as a dividend by TB&T to its U.S. holders rather than as additional consideration in the merger, such distribution will be taxable to such holders as a dividend to the extent of TB&T’s current and accumulate earnings and profits as determined under the Code, with any portion of the distribution that exceeds TB&T’s current and accumulated earnings and profits applied first to reduce the U.S. holder’s tax basis in such holder’s TB&T common stock to the extent of such holder’s tax basis and then as gain from the disposition of the TB&T common stock.

The remainder of this discussion assumes that the special dividend will be treated as additional consideration received by a U.S. holder in exchange for such holder’s TB&T common stock.

Exchange of Shares of TB&T Common Stock for Shares of First Financial Common Stock and Special Dividend. A U.S. holder who receives First Financial common stock and the special dividend in exchange for such holder’s TB&T common stock will recognize gain (but not loss) equal to the lesser of: (i) the amount, if any, of the special dividend received by such holder of TB&T common stock (in each case excluding any cash received in lieu of a fractional share of First Financial common stock, which treatment is discussed below) and (ii) the amount by which the sum of the fair market value of the First Financial common stock and the special dividend received by a holder of TB&T common stock exceeds such holder’s tax basis in its TB&T common stock. Any gain recognized by a U.S. holder could be taxed as a capital gain or a dividend, as described below. Any gain recognized by a U.S. holder generally will be long-term capital gain if, as of the effective date of the merger, such holder’s holding period with respect to the TB&T common stock surrendered exceeds one year. For U.S. holders of shares of TB&T common stock that arenon-corporate holders, long-term capital gain generally will be taxed at a U.S. federal income tax rate that is lower than the rate for ordinary income or for short-term capital gains. The deductibility of capital losses is subject to limitations.

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The aggregate tax basis of the shares of First Financial common stock received (including any fractional share of First Financial common stock deemed issued and redeemed as described below) by a U.S. holder will be equal to such U.S. holder’s aggregate tax basis in shares of TB&T common stock surrendered in exchange for the shares of First Financial common stock, plus any taxable gain recognized in the merger by such U.S. holder (excluding gain as a result of cash received in lieu of a fractional share) regardless of whether such gain is classified as capital gain or dividend income, and minus any special dividend received (other than cash in lieu of a fractional share) by the U.S. holder in the merger. The holding period for shares of First Financial common stock received in the merger (including a fractional share of First Financial common stock deemed received and redeemed as described below) by a U.S. holder will include such U.S. holder’s holding period for the TB&T common stock surrendered in exchange for the First Financial common stock. If a TB&T shareholder has differing tax bases and/or holding periods in respect of shares of TB&T common stock, such TB&T shareholder should consult with its own tax advisor with respect to the determination of the tax bases and/or holding periods of the particular shares of First Financial common stock received.

Cash Received in Lieu of a Fractional Share. A U.S. holder of shares of TB&T common stock who receives cash in lieu of a fractional share of First Financial common stock will be treated as having received a fractional share of First Financial common stock pursuant to the integrated mergers and then as having sold the fractional share for cash in a redemption by First Financial. As a result, except to the extent the cash received in lieu of a fractional share of First Financial common stock is treated as a dividend (as discussed below), such U.S. holder will generally recognize gain or loss equal to the difference between the amount of cash received and the basis in his or her fractional share interest as set forth above. This gain or loss will generally be capital gain or loss, and will be long-term capital gain or loss if, as of the effective date of the integrated mergers, such U.S. holder’s holding period for the TB&T shares surrendered in the integrated mergers is greater than one year. For U.S. holders of shares of TB&T common stock that arenon-corporate holders, long-term capital gain generally will be taxed at a U.S. federal income tax rate that is lower than the rate for ordinary income or for short-term capital gains. The deductibility of capital losses is subject to limitations.

Potential Treatment of Cash as a Dividend. The determination of whether the gain recognized by a U.S. holder in the exchange will be treated as capital gain or a dividend depends upon whether and to what extent the exchange reduces the U.S. holder’s deemed percentage stock ownership of First Financial. In determining a U.S. holder’s deemed stock percentage in First Financial, a U.S. holder may, under the constructive ownership rules, be deemed to own stock of First Financial that is owned by other persons or stock of First Financial underlying a U.S. holder’s option to purchase in addition to the stock of First Financial actually owned by the U.S. holder. These rules are complex and dependent upon the specific factual circumstances particular to each U.S. holder. Consequently, each U.S. holder that may be subject to these rules should consult its tax advisor as to the application of these rules to the particular facts relevant to such holder.

Dissenters. Upon the proper exercise of dissenters’ rights, a U.S. holder of shares of TB&T common stock will exchange all of the shares of TB&T common stock actually owned by such holder solely for cash and will recognize gain or loss equal to the difference between the amount of cash received, which for this purpose includes the special dividend, and such holder’s tax basis in the shares of TB&T common stock surrendered. The gain or loss will be long-term capital gain or loss if the U.S. holder’s holding period with respect to the TB&T common stock surrendered is more than one year. The deductibility of capital losses is subject to limitations. In some cases, if the U.S. holder owns shares of First Financial common stock actually or constructively after the integrated mergers, the cash received could be treated as a dividend, in which case such holder may recognize dividend income up to the amount of cash received. Because the possibility of dividend treatment depends upon each U.S. holder’s particular circumstances, including the application of constructive ownership rules, U.S. holders of TB&T common stock are urged to consult their own tax advisors regarding the application of the foregoing rules to their particular circumstances.

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Backup Withholding and Information Reporting

U.S. holders of TB&T common stock other than certain exempt recipients may be subject to information reporting and backup withholding (currently at a rate of 24%) on any cash payments received in connection with the integrated mergers. A U.S. holder generally will not be subject to backup withholding, however, if the U.S. holder:

• furnishes a correct taxpayer identification number, certifies that the U.S. holder is not subject to backup withholding on the FormW-9 or successor form included in the election form/letter of transmittal the U.S. holder will receive and otherwise complies with all the applicable requirements of the backup withholding rules; or

• provides proof that the U.S. holder is otherwise exempt from backup withholding.

Any amounts withheld from payments to U.S. holders of TB&T common stock under the backup withholding rules are not an additional tax and generally will be allowed as a refund or credit against such holder’s applicable U.S. federal income tax liability, provided the required information is timely furnished to the IRS. U.S. holders of TB&T common stock should consult their own tax advisors regarding the application of backup withholding based on their particular circumstances and the availability of, and procedure for, obtaining an exemption from backup withholding.

Medicare Tax

If a U.S. holder that is an individual has modified gross income for the taxable year over a certain threshold ($125,000 and $250,000 depending upon the individual’s U.S. federal income tax filing status), such an individual is subject to a 3.8% tax (the “Medicare Tax”) on the lesser of: (i) his or her “net investment income” for the relevant taxable year; or (ii) the excess of his or her modified gross income for the taxable year over his or her applicable threshold ($125,000 and $250,000 depending upon the individual’s U.S. federal income tax filing status). In the case of an estate or trust, the Medicare Tax will be imposed on the lesser of: (i) undistributed net investment income, or (ii) the excess of its adjusted gross income over the dollar amount at which the highest income tax bracket applicable to an estate or trust begins for the relevant taxable year. Net investment income generally would include any capital gain incurred in connection with the integrated mergers (including gain treated as dividend income), as well as other items of interest, dividends, capital gains, and rental or royalty income.

THE PRECEDING DISCUSSION IS INTENDED ONLY AS AN OVERVIEW OF CERTAIN MATERIAL U.S. FEDERAL INCOME TAX CONSEQUENCES OF THE INTEGRATED MERGERS. IT IS NOT A COMPLETE ANALYSIS OR DISCUSSION OF ALL POTENTIAL TAX EFFECTS THAT MAY BE IMPORTANT TO YOU. THUS, YOU ARE STRONGLY ENCOURAGED TO CONSULT YOUR OWN TAX ADVISOR AS TO THE SPECIFIC TAX CONSEQUENCES RESULTING FROM THE INTEGRATED MERGERS, INCLUDING TAX RETURN REPORTING REQUIREMENTS, THE APPLICABILITY AND EFFECT OF FEDERAL, STATE, LOCAL AND OTHER TAX LAWS AND THE EFFECT OF ANY PROPOSED CHANGES IN THE TAX LAWS.

Accounting Treatment

The merger will be accounted for under the acquisition method of accounting under accounting principles generally accepted in the United States of America. Under this method, TB&T’s assets and liabilities as of the date of the merger will be recorded at their respective fair values. Any difference between the purchase price for TB&T and the fair value of the identifiable net assets acquired (including core deposit intangibles) will be recorded as goodwill. In accordance with ASC Topic 805,Business Combinations, issued in July 2001, the goodwill resulting from the merger will not be amortized to expense, but instead will be reviewed for impairment at least annually and to the extent goodwill is impaired, its carrying value will be written down to its implied fair value and a charge will be made to earnings. Core deposit and other intangibles with definite useful lives

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recorded by First Financial in connection with the merger will be amortized to expense in accordance with such rules. The consolidated financial statements of First Financial issued after the merger will reflect the results attributable to the acquired operations of TB&T beginning on the date of completion of the merger.

Restrictions on Resales of First Financial Common Stock Received in the Merger

The shares of First Financial common stock issued in the merger will not be subject to any restrictions on transfer arising under the Securities Act, except for shares of First Financial common stock issued to any TB&T shareholder who may be deemed to be an “affiliate” of First Financial after completion of the merger. “Affiliates” generally are defined as persons or entities who control, are controlled by or are under common control with First Financial at or after the effective time of the merger and generally include executive officers, directors and beneficial owners of 10% or more of the common stock of First Financial. TB&T shareholders who are not affiliates of First Financial after the completion of the merger may sell their shares of First Financial common stock at any time.

To the knowledge of TB&T, no TB&T shareholder who receives First Financial common stock will be deemed to be an affiliate of First Financial upon completion of the merger. In the event a TB&T shareholder become an affiliates of First Financial after completion of the merger, any sales of First Financial common stock will be subject to the volume and sale limitations of Rule 144 under the Securities Act, until such former TB&T Shareholder is no longer an affiliate of First Financial. This proxy statement/prospectus does not cover resales of First Financial common stock received by any person upon completion of the merger, and no person is authorized to make any use of this proxy statement/prospectus in connection with any resale.

Regulatory Approvals Required for the Merger

First Financial’s acquisition of TB&T must be approved by the Federal Reserve. On October 2, 2019, First Financial filed the required application with the Federal Reserve Bank of Dallas to request the Federal Reserve’s approval under the BHC Act.

In addition, the bank merger of The Bank & Trust with and into First Financial Bank requires the approval of the OCC. On October 2, 2019, First Financial Bank and The Bank & Trust filed an application with the OCC to obtain approval of bank merger. The U.S. Department of Justice will have between 15 and 30 days following approval by the OCC to challenge the approval on antitrust grounds. While TB&T and First Financial do not know of any reason that the Department of Justice would challenge regulatory approval by the OCC and believe that the likelihood of such action is remote, there can be no assurance that the Department of Justice will not initiate such a proceeding, or if such a proceeding is initiated, as to the result of any such challenge.

The merger cannot proceed in the absence of these required regulatory approvals. The approval of any notice or application merely implies satisfaction of regulatory criteria for approval, and does not include review of the merger from the standpoint of the adequacy of the consideration to be received by, or fairness to, shareholders. Regulatory approval does not constitute an endorsement or recommendation of the proposed transaction.

We cannot assure you as to whether or when the requisite regulatory approvals will be obtained, and, if obtained, we cannot assure you as to the date of receipt of any of these approvals, the terms thereof or the absence of any litigation challenging them. Likewise, we cannot assure you that the Department of Justice or a state attorney general will not attempt to challenge the merger on antitrust grounds, or, if such a challenge is made, as to the result of that challenge.

First Financial and TB&T are not aware of any material governmental approvals or actions that are required prior to the parties’ completion of the merger other than those described in this proxy statement/prospectus. If any additional governmental approvals or actions are required, the parties presently intend to seek those approvals or actions. However, the parties cannot assure you that any of these additional approvals or actions will be obtained.

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Although the approval of the Texas Department of Banking is not required for the merger of The Bank & Trust with and into First Financial Bank, a copy of the application filed with the Federal Reserve was filed with the Texas Department of Banking on October 8, 2019.

Dissenters’ Rights of TB&T Shareholders

General. If you hold one or more shares of TB&T common stock, you are entitled to dissenters’ rights under Texas law and have the right to dissent from the merger and have the appraised fair value of your shares of TB&T common stock paid to you in cash. The appraised fair value may be more or less than the value of the shares of First Financial common stock and, if applicable, cash, being paid in the merger in exchange for the common stock of TB&T. If you are contemplating exercising your right to dissent, we urge you to read carefully the provisions of Chapter 10, Subchapter H of the TBOC, which are attached to this proxy statement/prospectus asAppendix E, and consult with your legal counsel before electing or attempting to exercise these rights. The following discussion describes the steps you must take if you want to exercise your right to dissent. You should read this summary and the full text of the law carefully.

How to Exercise and Perfect Your Right to Dissent. To be eligible to exercise your right to dissent to the merger:

(i) you must, prior to the TB&T special meeting, provide TB&T with a written objection to the merger that states that you intend to exercise your right to dissent if the reorganization agreement is approved and the merger is completed and that provides an address to which TB&T may send a notice if the merger is completed;

(ii) you must vote your shares of TB&T common stock against approval of the merger proposal at the special meeting in person or by proxy; and

(iii) you must, not later than the 20th day after First Financial (which will be the successor to TB&T) sends you notice that the merger was completed, provide First Financial with (1) a written demand for payment of the fair value of the shares of TB&T common stock that you own which states the number and class of shares of TB&T capital stock you own, your estimate of the fair value of such stock and an address to which a notice relating to the dissent and appraisal procedures may be sent and (2) your certificates representing TB&T common stock.

If you intend to dissent from the merger, you should send the notice to:

TB&T Bancshares, Inc.

1716 Briarcrest Drive, Suite 400

Bryan, Texas 77802

Attention: Chairman and CEO

If you fail to (i) send the written objection to the merger in the proper form prior to the TB&T special meeting, (ii) vote your shares of TB&T common stock at the special meeting against the approval of the merger proposal or (iii) submit your demand for payment in the proper form on a timely basis, you will lose your right to dissent from the merger. If you fail to submit to First Financial on a timely basis the certificates representing the shares of TB&T common stock that you hold after you have submitted the demand for payment as described above, First Financial will have the option to terminate your right of dissent as to your shares of TB&T common stock. In any instance of a termination or loss of your right of dissent, you will instead receive the consideration authorized by the board of directors of TB&T and calculated in accordance with the reorganization agreement following consummation of the merger. If you comply with items (i) and (ii) above and the merger is completed, First Financial will send you a written notice advising you that the merger has been completed. First Financial must deliver this notice to you within 10 days after the merger is completed.

Your Demand for Payment. If the merger is completed, you have provided your written objection to the merger to TB&T in a timely manner and in proper form and you have voted against the merger proposal at the

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special meeting as described above and you desire to receive the fair value of your shares of TB&T common stock in cash, you must, within 20 days of the date on which First Financial sends to you the notice of the effectiveness of the merger, give First Financial a written demand for payment of the fair value of your shares of TB&T common stock. The fair value of your shares of TB&T common stock will be the value of the shares on the day immediately preceding the merger, excluding any appreciation or depreciation in anticipation of the merger. After the merger is completed, your written demand and any notice sent to First Financial must be addressed to:

First Financial Bankshares, Inc.

400 Pine Street

Abilene, Texas 79601

Attention: President and Secretary

Your written demand must include a demand for payment for your shares for which rights of dissent and appraisal are sought and must state the number of shares and class of TB&T common stock you own and your estimate of the fair value of your shares of TB&T common stock and an address to which a notice relating to the dissent and appraisal procedures may be sent. This written demand must be delivered to First Financial within 20 days of the date on which First Financial sends to you the notice of the effectiveness of the merger. If your written demand for payment in proper form is not received by First Financial within that 20 day period, you will be bound by the merger and you will not be entitled to receive a cash payment representing the fair value of your shares of TB&T common stock. Instead, you will receive shares of First Financial common stock and, if applicable, cash as the merger consideration set forth in the reorganization agreement.

Delivery of Stock Certificates.If you have satisfied the requirements for the exercise of your right to dissent described above, including the delivery of the written demand for payment to First Financial as described above, you must, not later than the 20th day after you make your written demand for payment to First Financial, submit to First Financial your certificate or certificates representing the shares of TB&T common stock that you own, as the case may be. You may submit those certificates with your demand for payment if you prefer. In accordance with the provisions of the TBOC, First Financial will note on each such certificate that you have demanded payment of the fair value of the shares of TB&T common stock that were represented by such certificate under the provisions of the TBOC relating to the rights of dissenting owners. If you fail to submit all of the certificates representing the shares of TB&T common stock for which you have exercised the right of dissent in a timely fashion, First Financial will have the right to terminate your rights of dissent and appraisal with respect to all of your shares of TB&T common stock unless a court, for good cause shown, directs First Financial not to terminate those rights.

First Financial’s Actions Upon Receipt of Your Demand for Payment. Within 20 days after First Financial receives your demand for payment and your estimate of the fair value of your shares of TB&T common stock, First Financial must send you written notice stating whether or not it accepts your estimate of the fair value of your shares.

If First Financial accepts your estimate, First Financial will notify you that it will pay the amount of your estimated fair value within 90 days of the merger being completed. First Financial will make this payment to you only if you have surrendered the share certificates representing your shares of TB&T common stock, duly endorsed for transfer, to First Financial.

If First Financial does not accept your estimate, First Financial will notify you of this fact and will make an offer of an alternative estimate of the fair value of your shares that it is willing to pay you within 120 days of the merger being completed, which you may accept within 90 days or decline.

Payment of the Fair Value of Your Shares of TB&T Common Stock Upon Agreement of an Estimate. If you and First Financial have reached an agreement on the fair value of your shares of TB&T common stock within 90

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days after the merger is completed, First Financial must pay you the agreed amount within 120 days after the merger is completed, provided that you have surrendered the share certificates representing your shares of TB&T common stock, duly endorsed for transfer, to First Financial.

Commencement of Legal Proceedings if a Demand for Payment Remains Unsettled. If you and First Financial have not reached an agreement as to the fair market value of your shares of TB&T common stock within 90 days after the merger is completed, you or First Financial may, within 60 days after the expiration of such 90 day period, commence proceedings in Taylor County, Texas, asking the court to determine the fair value of your shares of TB&T common stock. The court will determine if you have complied with provisions of the TBOC regarding their right of dissent and if you have become entitled to a valuation of and payment for your shares of TB&T common stock. The court will appoint one or more qualified persons to act as appraisers to determine the fair value of your shares in the manner prescribed by the TBOC. The appraisers will determine the fair value of your shares and will report this value to the court. The court will consider the report, and both you and First Financial may address the court about the report. The court will determine the fair value of your shares and direct First Financial to pay that amount, plus interest, which will begin to accrue 91 days after the merger is completed. The court may require you to share in the court costs relating to the matter to the extent the court deems it fair and equitable that you do so.

Rights as a Shareholder. If you have made a written demand on First Financial for payment of the fair value of your shares of TB&T common stock, you will not thereafter be entitled to vote or exercise any other rights as a shareholder except the right to receive payment for your shares as described herein and the right to maintain an appropriate action to obtain relief on the ground that the merger would be or was fraudulent. In the absence of fraud in the transaction, your right under the dissent provisions described herein is the exclusive remedy for the recovery of the value of your shares of TB&T common stock or money damages with respect to the merger.

Withdrawal of Demand. If you have made a written demand on First Financial for payment of the fair value of your TB&T common stock, you may withdraw such demand at any time before payment for your shares has been made or before a petition has been filed with a court for determination of the fair value of your shares. If you withdraw your demand or are otherwise unsuccessful in asserting your dissenters’ rights, you will be bound by the merger and your status as a shareholder will be restored without prejudice to any corporate proceedings, dividends or distributions which may have occurred during the interim.

Income Tax Consequences. See“—Certain Material U.S. Federal Income Tax Consequences of the Integrated Mergers” on page55 for a discussion on how the federal income tax consequences of your action will change if you elect to dissent from the merger.

PROPOSAL 2: ADJOURNMENT OF THE SPECIAL MEETING

The special meeting may be adjourned or postponed to a later date or dates in order to permit further solicitation of proxies. In order to allow proxies that have been received at the time of the meeting to be voted for an adjournment, if necessary, the voting representatives and board of directors of TB&T are submitting the question of adjournment/postponement to the TB&T shareholders as a separate matter for their consideration. The voting representatives and the board of directors of TB&T recommend that its shareholders vote “FOR” the adjournment proposal. If it is necessary to adjourn or postpone the special meeting, no notice of such adjourned or postponed meeting is required to be given to TB&T’s shareholders. To adjourn or postpone the special meeting, the affirmative vote of a majority of the shares of TB&T common stock present, in person or by proxy, at the meeting is required.

The board of directors of TB&T recommends that you vote “FOR” the adjournment proposal.

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COMPARISON OF RIGHTS OF SHAREHOLDERS

OF TB&T AND FIRST FINANCIAL

The rights of shareholders of TB&T under the certificate of formation and bylaws of TB&T will differ in some respects from the rights that shareholders of TB&T will have as shareholders of First Financial under the certificate of formation and bylaws of First Financial. Copies of First Financial’s certificate of formation and bylaws have been previously filed by First Financial with the SEC. Copies of TB&T’s certificate of formation and bylaws are available upon written request from TB&T.

Certain differences between the provisions contained in the certificate of formation and bylaws of TB&T, and the certificate of formation and bylaws of First Financial, as such differences may affect the rights of shareholders, are summarized below. The summary set forth below is not intended to be complete and is qualified by reference to Texas law and, the certificate of formation and bylaws of TB&T and the certificate of formation and bylaws of First Financial. If the merger is consummated, holders of TB&T common stock (other than dissenting shareholders) will become holders of First Financial common stock, and their rights as holders of First Financial common stock will be governed by the TBOC and First Financial’s certificate of formation and bylaws.

Summary of Material Differences Between Current Rights of

Shareholders of TB&T and Rights Those Persons

Will Have as Shareholders of First Financial

	TB&T	First Financial
Capitalization:	The certificate of formation of TB&T authorizes the issuance of up to 10,000,000 shares of common stock, par value $1.00 per share.	The certificate of formation of First Financial authorizes the issuance of up to 200,000,000 shares of common stock, par value $0.01 per share.
Corporate Governance:	The rights of TB&T shareholders are governed by Texas law and the certificate of formation and bylaws of TB&T.	The rights of First Financial shareholders are governed by Texas law and the certificate of formation and bylaws of First Financial.
Convertibility of Stock:	TB&T common stock is not convertible into any other securities of TB&T.	First Financial common stock is not convertible into any other securities of First Financial.
Preemptive Rights:	Under Texas law, there are no statutory preemptive rights unless expressly provided in the corporation’s certificate of formation. The certificate of formation of TB&T does not provide for statutory preemptive rights.	The certificate of formation of First Financial denies preemptive rights.
Election of Directors:	Directors of TB&T are elected by a plurality of the votes cast by the shareholders entitled to vote in the election of directors at a meeting of the shareholders at which a quorum is present. Any individual that receives the plurality of the votes cast, up to the number of directors to be elected in such election, shall be elected to the board.	Directors of First Financial are elected by a majority of the votes cast by the holders entitled to vote at the meeting. First Financial shareholders are not permitted to cumulate their votes in the election of directors. Each share of First Financial stock has one vote for each nominee for director.

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	TB&T	First Financial
	No cumulative voting is permitted for the election of directors pursuant to the certificate of formation.	If the number of director nominees exceeds the number of directors to be elected, the directors shall be elected by a plurality of the voting power of the shares entitled to vote who are present, in person or by proxy, at any such meeting and entitled to vote on the election of directors. A majority of the votes cast means that the number of shares voted “for” a proposal, including the election of directors, must exceed the number of shares voted “against,” or “withheld” for, that proposal, and an abstention shall not constitute a vote cast. If, for any cause, the entire board of directors shall not have been elected at an annual meeting, any vacancies may be filled by an election as soon thereafter as convenient at a special meeting of the shareholders called for that purpose in the manner provided in the bylaws.
Removal of Directors and Board Vacancies:	TB&T’s bylaws provide that at any meeting of TB&T’s shareholders, any director or the entire board of directors may be removed, with or without cause, by a vote of the holders of a majority of the shares then entitled to vote at any election of directors.	First Financial’s bylaws provide that at any meeting of First Financial’s shareholders, any director or the entire board of directors may be removed, with or without cause, by a vote of the holders of a majority of the shares then entitled to vote at any election of directors.
	Any vacancies existing in the board of directors of TB&T may be filled by the affirmative vote of a majority of the remaining directors though less than a quorum of the board of directors. A director elected to fill a vacancy will be elected for the unexpired term of his predecessor in office.	Any vacancies existing in the board of directors of First Financial may be filled by election at an annual or special meeting of the shareholders or by the affirmative vote of a majority of the remaining directors though less than a quorum of the board of directors. A director elected to fill a vacancy will be elected for the unexpired term of his predecessor in office.
	A directorship to be filled by reason of an increase in the number of directors may be filled by the board of directors for a term of office continuing only until the next election of one or more	A directorship to be filled by reason of an increase in the number of directors either may be filled by the board of directors for a term of office continuing only until the next election

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	TB&T	First Financial
	directors by the shareholders; provided, that the board of directors may not fill more than two such directorships during the period between any two successive annual meetings of shareholders.	of one or more directors by the shareholders or may be filled by election at an annual meeting or at a special meeting of the shareholders entitled to vote called for that purpose; provided that the board of directors may not fill more than two such directorships during the period between any two successive annual meetings of shareholders.
Vote Required for Certain Shareholder Actions:	TB&T’s bylaws provide that if a quorum exists, action on any matter must be approved by the affirmative vote of a majority of the votes cast, unless applicable law, the certificate of formation, the bylaws or a resolution adopted by the board of directors requires a different number of affirmative votes. Each share of TB&T common stock has one vote for each matter properly brought before the shareholders.	First Financial’s bylaws provide that if a quorum exists, action on any matter, including the election of directors, by a voting group shall be approved by the affirmative vote of a majority of the votes cast, unless the certificate of formation, bylaws or applicable law require a greater number of affirmative votes. The bylaws also provide that a majority of the votes cast means that the number of shares voted “for” a proposal, including the election of directors, must exceed the number of shares voted “against,” or “withheld” for, that proposal, and an abstention shall not constitute a vote cast.
Amendment of Certificate of Formation:	TB&T’s certificate of formation may be amended in accordance with the TBOC. Under the TBOC, amendments to a corporation’s certificate of formation generally must be approved by the affirmative vote of the holders oftwo-thirds of the outstanding shares entitled to vote on the amendment.	First Financial’s certificate of formation may be amended in accordance with the TBOC. Under the TBOC, amendments to a corporation’s certificate of formation generally must be approved by the affirmative vote of the holders oftwo-thirds of the outstanding shares entitled to vote on the amendment.
Amendment of Bylaws:	TB&T’s bylaws provide that the bylaws may be altered, amended or repealed and new bylaws may be adopted by the affirmative vote of a majority of the board of directors present at any meeting at which a quorum is present, subject to repeal or change by the affirmative vote of a majority of the shareholders.	First Financial’s bylaws provide that the bylaws may be altered, amended or repealed and new bylaws may be adopted by the affirmative vote of a majority of the board of directors, subject to repeal or change by the affirmative vote of a majority of the shareholders.

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	TB&T	First Financial
Shareholder Actions Without a Meeting:	TB&T’s certificate of formation provides that shareholder action may be taken without a meeting if a written consent or consents setting forth the action taken is signed by shareholders representing not less than the minimum number of votes that would have been necessary to take such an action at a meeting at which the holders of all shares entitled to vote were present and voted.	First Financial’s certificate of formation does not provide for less than unanimous consent when shareholder action is taken without a meeting, and therefore, no action may be taken by written consent unless all shareholders agree.
Special Meetings of Shareholders:	TB&T’s bylaws provide that special meetings of shareholders may be called at any time by the chairman of the board, by the chief executive officer, by the president, by the board of directors, or by the holders of 50% of the outstanding shares of the corporation entitled to vote at the proposed special meeting.	First Financial’s bylaws provide that special meetings of the shareholders may be called only by the chairman of the board joined by at least three members of the board of directors, or a majority of the board of directors, and shall be called by the chairman of the board or secretary at the request in writing of shareholders owning not less than 20% of the issued and outstanding shares of First Financial entitled to vote at such meeting.
Nomination of Directors:	Nominations for election to the TB&T board of directors may be made by the board of directors or by any shareholder entitled to vote in the election of directors, provided the shareholder gives timely written notice of such intention. To be timely, notice given in the context of an annual meeting of shareholders must be received by TB&T not less than 90 days nor more than 120 days in advance of the first anniversary of the preceding year’s annual meeting; provided, however, if the annual meeting is not within 30 days before or after such anniversary date, notice by the shareholder in order to be timely must be so received not later than the 15th day following the day on which notice of the date of the annual meeting was mailed or public disclosure of the date of the annual meeting was made, whichever first occurs.	Nominations for election to the First Financial board of directors may be made by the board of directors or by any shareholder entitled to vote in the election of directors, provided the shareholder gives timely written notice of such intention. To be timely, notice given in the context of an annual meeting of shareholders must be received by First Financial not less than 120 days nor more than 150 days in advance of the first anniversary of the preceding year’s annual meeting.
Shareholder Proposal of Business:	Proposals for business to be brought before an annual shareholder meeting may be made by the board of directors or by any shareholder entitled to vote in	Proposals for business to be brought before an annual shareholder meeting may be made by the board of directors or by any shareholder entitled to vote

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	TB&T	First Financial
	such meeting. If a proposal is made by a shareholder, the shareholder must give timely written notice. To be timely, notice must be received by TB&T not less than 90 nor more than 120 days in advance of the first anniversary of the preceding year’s annual meeting; provided, however, if the annual meeting is not within 30 days before or after such anniversary date, notice by the shareholder in order to be timely must be so received not later than the 15th day following the day on which notice of the date of the annual meeting was mailed or public disclosure of the date of the annual meeting was made, whichever first occurs.	in such meeting. If a proposal is made by a shareholder, the shareholder must give timely written notice. To be timely, notice must be received by First Financial not less than 90 nor more than 120 days in advance of the first anniversary of the preceding year’s annual meeting.
Indemnification; Limitation of Director Liability:	TB&T’s certificate of formation provides for mandatory indemnification to the fullest extent allowed by Texas law for all former or present directors or officers and all persons who were serving at the request of TB&T as a director, officer, or agent of another entity. TB&T’s certificate of formation provides that the personal liability of the directors and officers of TB&T for monetary damages shall be eliminated to the fullest extent permitted by applicable law. The certificate of formation permits TB&T to purchase and maintain insurance on behalf of indemnified persons.	First Financial’s certificate of formation and bylaws provide for mandatory indemnification to the fullest extent allowed by Texas law for all former or present directors or officers and all persons who were serving at the request of First Financial as a director, officer, or agent of another entity. First Financial’s certificate of formation provides that a director shall not be liable to First Financial’s or its shareholders for monetary damages for an act or omission in his or her capacity as a director, except for liability for: •  breach of the duty of loyalty to First Financial or its shareholders; •  an act or omission not in good faith or that involves intentional misconduct or a knowing violation of the law; •  a transaction from which the director received an improper benefit, whether or not the benefit resulted from an action taken within the scope of the director’s office;

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TB&T

First Financial

•  an act or omission for which the liability of the director is expressly provided by statute; or •  an act related to an unlawful stock repurchase or payment of a dividend. First Financial’s certificate of formation and bylaws provide that the corporation shall have the power to purchase and maintain insurance on behalf of the directors against any liability incurred by directors in such a capacity or arising out of such person’s status.

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TEXAS ANTI-TAKEOVER STATUTES

First Financial is subject to the affiliated business combinations provisions of Chapter 21, Subchapter M of the TBOC (Sections 21.601 through 21.610), which provide that a Texas corporation may not engage in certain business combinations, including mergers, consolidations and asset sales, with a person, or an affiliate or associate of such person, who is an “Affiliated Shareholder” (generally defined as the holder of 20% or more of the corporation’s voting shares) for a period of three years from the date such person became an Affiliated Shareholder unless: (1) the business combination or purchase or acquisition of shares made by the Affiliated Shareholder was approved by the board of directors of the corporation before the Affiliated Shareholder became an Affiliated Shareholder or (2) the business combination was approved by the affirmative vote of the holders of at leasttwo-thirds of the outstanding voting shares of the corporation not beneficially owned by the Affiliated Shareholder, at a meeting of shareholders called for that purpose (and not by written consent), not less than six months after the Affiliated Shareholder became an Affiliated Shareholder.

The affiliated business combinations provisions of the TBOC are not applicable to:

• the business combination of a corporation:

(a) where the corporation’s original certificate of formation or bylaws contain a provision expressly electing not to be governed by the affiliated business combinations provisions of the TBOC;

(b) that adopted an amendment to its certificate of formation or bylaws before December 31, 1997, expressly electing not to be governed by the affiliated business combinations provisions of the TBOC; or

(c) that adopts an amendment to its certificate of formation or bylaws after December 31, 1997, by the affirmative vote of the holders, other than Affiliated Shareholders, of at leasttwo-thirds of the outstanding voting shares of the corporation, expressly electing not to be governed by the affiliated business combinations provisions of the TBOC;

• a business combination of a corporation with an Affiliated Shareholder that became an Affiliated Shareholder inadvertently, if the Affiliated Shareholder:

(a) as soon as practicable divests itself of enough shares to no longer be an Affiliated Shareholder; and

(b) would not at any time within the three-year period preceding the announcement of the business combination have been an Affiliated Shareholder but for the inadvertent acquisition;

• a business combination with an Affiliated Shareholder that was the beneficial owner of 20% or more of the outstanding voting shares of the corporation on December 31, 1996, and continuously until the announcement date of the business combination;

• a business combination with an Affiliated Shareholder who became an Affiliated Shareholder through a transfer of shares of the corporation by will or intestate succession and continuously was such an Affiliated Shareholder until the announcement date of the business combination; or

• a business combination of a corporation with a wholly owned subsidiary if the subsidiary is not an affiliate or associate of the Affiliated Shareholder other than by reason of the Affiliated Shareholder’s beneficial ownership of the voting shares of the corporation.

Neither First Financial’s certificate of formation nor its bylaws contain any provision expressly providing that First Financial will not be subject to the affiliated business combinations provisions of the TBOC. The affiliated business combinations provisions of the TBOC may have the effect of inhibiting anon-negotiated merger or other business combination involving First Financial, even if such event(s) would be beneficial to the shareholders of First Financial.

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BUSINESS OF TB&T BANCSHARES, INC.

General

TB&T was incorporated as a Texas corporation in October 2017 to serve as a bank holding company for The Bank & Trust. TB&T does not, as an entity, engage in separate business activities of a material nature apart from the activities it performs for The Bank & Trust. Its primary activities are to provide assistance in the management and coordination of The Bank & Trust’s financial resources. TB&T has no significant assets other than all of the outstanding common stock of The Bank & Trust. TB&T derives its revenues primarily from the operations of The Bank & Trust in the form of dividends received from The Bank & Trust.

The Bank & Trust is the successor to Texas Enterprise Bank, chartered in 2006, under Texas law. In 2009, Texas Enterprise Bank acquired the Bryan/College Station, Texas branches of The Bank and Trust, S.S.B., Del Rio, Texas, and changed its name to The Bank & Trust of Bryan/College Station. Since its inception, The Bank & Trust has generally grown organically without any significant acquisitions.

As a bank holding company, TB&T is subject to supervision and regulation by the Federal Reserve in accordance with the requirements set forth in the BHC Act and by the rules and regulations issued by the Federal Reserve.

As of September 30, 2019, TB&T, on a consolidated basis, had total assets of $630.2 million, total net loans of $436.2 million, total deposits of $552.8 million and total shareholders’ equity of $76.1 million. TB&T does not file reports with the SEC. TB&T does, however, voluntarily provide annual reports, including audited financial statements, to its shareholders in connection with its annual meeting.

Products and Services

The Bank & Trust is a traditional commercial bank offering a wide variety of services to satisfy the needs of the consumer and commercial customers in its primary market areas. The Bank & Trust offers most types of loans for any legitimate purpose, including loans to small- andmedium-sized businesses for the purpose of purchasing equipment, inventory, facilities or for working capital and agricultural loans. Consumer loans offered include loans for the purpose of purchasing automobiles, recreational vehicles, personal residences and household goods, and for home improvements needs. Further, The Bank & Trust offers mortgage loans to borrowers to purchase, improve and refinanceone-to-four family properties, as well as larger multifamily properties. The Bank & Trust also makes real estate development and construction loans and most types of commercial real estate loans, both owner-occupied andnon-owner-occupied. Additionally, The Bank & Trust provides business and personal depository products and services, including checking and savings accounts, certificates of deposit, money market accounts, debit cards, online banking, direct deposit services, business accounts and cash management services. Safe deposit boxes, money orders and wire transfer services are also available. The Bank & Trust’s business is not seasonal in any material respect.

The Bank & Trust funds its lending activities primarily from the core deposit base. The Bank & Trust obtains deposits from the local market with no material portion (in excess of 10% of total deposits) dependent upon any one person or entity.

Market Area

The Bank & Trust currently has five banking locations, three of which are located in Bryan, Brazos County, Texas, and the other two of which are located in College Station, Brazos County, Texas. The Bank & Trust’s business is not dependent on one or a few major customers.

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Competition

The table below lists The Bank & Trust’s deposit market share for the sole market area in which The Bank & Trust provides services, using data provided by the FDIC’s Summary of Deposits reported as of June 30, 2019.

Market Area	Market Rank		No. of Institutions in Market		Branch Count		Deposits In Market (in millions)		Market Share (%)
College Station-Bryan, Texas MSA		4		23		5	$	538.3		8.99	%

Each activity in which TB&T is engaged involves competition with other banks, as well as with nonbanking financial institutions and nonfinancial enterprises. In addition to competing with other commercial banks within and outside its primary service area, TB&T competes with other financial institutions engaged in the business of making loans or accepting deposits, such as savings and loan associations, credit unions, insurance companies, small loan companies, financial companies, mortgage companies, real estate investment trusts, certain governmental agencies, credit card organizations and other enterprises. TB&T also competes with suppliers of equipment in furnishing equipment financing. Banks and other financial institutions with which TB&T competes may have capital resources and legal loan limits substantially higher than those maintained by TB&T.

Employees

As of September 30, 2019, TB&T had 83 full-time equivalent employees, none of whom is covered by a collective bargaining agreement.

Legal Proceedings

There are no threatened or pending legal proceedings against TB&T which, if determined adversely, would, in the opinion of management, have a material adverse effect on the business of TB&T’s financial condition, results of operations or cash flows.

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BENEFICIAL OWNERSHIP OF TB&T COMMON STOCK BY

MANAGEMENT AND PRINCIPAL SHAREHOLDERS OF TB&T

The following table sets forth certain information regarding the beneficial ownership of TB&T common stock as of October 28, 2019 by: (1) each person who is known by TB&T to beneficially own 5% or more of TB&T’s common stock; (2) each director of TB&T; (3) each named executive officer of TB&T; and (4) all directors and named executive officers of TB&T as a group. Unless otherwise indicated, based on information furnished by such shareholders, management of TB&T believes that each person has sole voting and dispositive power over the shares indicated as owned by such person. The address for each of the listed beneficial owners is c/o TB&T Bancshares, Inc., 1716 Briarcrest, Suite 400, Bryan, Texas 77802.

Name of Beneficial Owner	Number of Shares Beneficially Owned			Percentage Beneficially Owned(1)
Principal Shareholders
Westex Bancorp, Inc.		403,007			8.13	%
James R. Leininger		382,147			7.71	%
Directors and Executive Officers
Timothy N. Bryan, Chairman and Chief Executive Officer		305,165	(2)		6.15	%
Jerry E. Fox, Vice Chairman and Chief Financial Officer		79,897			1.61	%
Ivan M. Olson, President and Chief Operating Officer		114,795			2.31	%
Michael A. Holmgreen, Vice Chairman		56,000			1.13	%
Brian D. Barrett		3,000			*
Sid Cauthorn		18,821	(3)		*
Ronnie L. Craig		12,500	(4)		*
Carl Lynn Elliott		9,000			*
Charles A. Ellison		16,426			*
Ramiro A. Galindo		118,130			2.38	%
Wayne P. Hartman		45,046			*
Lawrence B. Hodges, Jr.		5,000			*
Henry C. McQuaide, III		16,426			*
William L. Rayburn		12,500			*
All Directors and Executive Officers as a group (14 persons)		812,706			16.39	%

* Indicates ownership that does not exceed 1.00%.

(1) Ownership percentage is based on 4,959,674 shares of TB&T common stock outstanding as of October 28, 2019.

(2) Includes 52,500 shares held individually by Mr. Bryan and 252,665 shares held by Bryan-Heritage, Limited Partnership, which is controlled by Mr. Bryan.

(3) Includes 18,821 shares held by Juno Family Partnership, which is controlled by Mr. Cauthorn.

(4) Includes 12,500 shares held by Tahoka Investments, LLC, which is controlled by Mr. Craig.

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COMPARATIVE MARKET PRICES AND DIVIDEND DATA

First Financial

First Financial common stock is listed on the NASDAQ Global Select Market under the symbol “FFIN.” Quotations of the sales volume and the closing sales prices of the common stock of First Financial are listed daily in the NASDAQ’s listings.

The following table sets forth, for the periods indicated, the high and lowintra-day sales prices for the First Financial common stock as reported by the NASDAQ Global Select Market and the cash dividends declared per share (adjusted for stock dividends and splits):

	High(1)		Low(1)		Cash Dividends Per Share(1)
2017 First Quarter	$	23.225	$	18.775	$	0.09
Second Quarter		22.40		18.425		0.095
Third Quarter		23.00		18.655		0.095
Fourth Quarter		23.95		22.075		0.095
2018 First Quarter	$	24.80	$	22.025	$	0.095
Second Quarter	$	28.175		22.525		0.105
Third Quarter		30.93		25.275		0.105
Fourth Quarter		33.415		26.725		0.105
2019 First Quarter	$	32.65	$	27.13	$	0.105
Second Quarter		31.54		28.005		0.12
Third Quarter		33.97		29.50		0.12
Fourth Quarter(2)		35.86		32.01		0.12

(1) Effective June 3, 2019, First Financial declared a2-for-1 stock split payable to shareholders of record as of May 15, 2019.

(2) Through October 25, 2019. First Financial announced a cash dividend of $0.12 per share on October 22, 2019 that is payable to shareholders of record as of December 13, 2019 on January 2, 2020.

TB&T shareholders are advised to obtain the current stock quotation for First Financial common stock. The market price of First Financial common stock will fluctuate from the date of this proxy statement/prospectus to the date of completion of the merger. Because the number of shares of First Financial common stock to be issued in the merger and the aggregate merger consideration that TB&T shareholders will receive will fluctuate based on the market price of the First Financial common stock, TB&T shareholders will not know the exact amount of the value of the consideration that TB&T shareholders will receive in connection with the merger when TB&T shareholders vote on the reorganization agreement and merger.

After the merger, First Financial currently expects to pay (when, as and if declared by First Financial’s board of directors out of funds legally available for that purpose) regular quarterly cash dividends. While First Financial currently pays dividends on its common stock, there is no assurance that it will continue to pay dividends in the future. Future dividends on First Financial common stock will depend upon its earnings and financial condition, liquidity and capital requirements, the general economic and regulatory climate, its ability to service any equity or debt obligations senior to the common stock and other factors deemed relevant by the board of directors of First Financial.

As a holding company, First Financial is ultimately dependent upon its subsidiaries to provide funding for its operating expenses, debt service and dividends. Various banking laws applicable to First Financial Bank limit the payment of dividends and other distributions by First Financial Bank to First Financial, and may therefore limit First Financial’s ability to pay dividends on its common stock. Regulatory authorities could impose administratively stricter limitations on the ability of First Financial Bank to pay dividends to First Financial if such limits were deemed appropriate to preserve certain capital adequacy requirements.

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TB&T

There is no established public trading market for the shares of TB&T common stock, and no market for TB&T common stock is expected to develop if the merger does not occur. No registered broker/dealer makes a market in the TB&T common stock, and no shares of such stock are listed for trading or quoted on any stock exchange or automated quotation system. TB&T acts as the transfer agent and registrar for its own shares. As of the TB&T record date, there were approximately 273 holders of record of TB&T common stock.

TB&T becomes aware of trades of shares of TB&T common stock as transfer agent of its shares and sometimes the prices at which these trades are made. The following table sets forth the high and low sales prices known to management of TB&T for trades of its common stock for the periods shown:

	High		Low			Number of Trades		Number of Shares Traded
2017 First Quarter	$	22.74	$	22.12			11		67,395
Second Quarter		n/a		n/a			0		0
Third Quarter	$	24.28	$	23.07			4		35,700
Fourth Quarter	$	25.31	$	25.31			2		18,192
2018 First Quarter		n/a		n/a			0		0
Second Quarter	$	26.80	$	26.80			14		56,887
Third Quarter	$	27.94	$	27.94	��		6		9,576
Fourth Quarter	$	27.94	$	26.08			7		38,525
2019 First Quarter		n/a		n/a			0		0
Second Quarter	$	24.46	$	22.64			2		1,200
Third Quarter		n/a		n/a			0		0

The most recent trade of TB&T common stock occurred on April 29, 2019 when 1,000 shares were traded at a price of $24.46 per share. There have been other limited transfers of TB&T common stock that are not reflected in the table above, which were excluded as they were transferred between related parties (as gifts or to trusts or estates). Because of limited trading, the prices described above may not be representative of the actual or fair value of the TB&T common stock.

TB&T’s general dividend policy is to retain earnings to augment capital and to fund growth. Accordingly, TB&T has not historically paid dividends on outstanding shares of TB&T common stock. Under the terms of the reorganization agreement, TB&T is permitted to pay dividends of up to $2.0 million before the effective time of the merger. In the event that merger is not completed prior to the record for determining the shareholders of First Financial who are entitled to receive any regular cash dividend on First Financial common stock for the first quarter of 2020, then TB&T shareholders will be entitled to receive an additional aggregate cash amount equal to (a) the per share cash dividend on First Financial common stock declared by the First Financial board of directors with the previously mentioned record date multiplied by (b) 6,275,806 (which is the approximate number of shares of First Financial common stock to be tendered as consideration for the merger). In each case, any dividend payable by TB&T would be paid prior to the closing of the merger.

TB&T’s shareholders are entitled to receive dividends out of legally available funds when, as and if declared by TB&T’s board of directors, in its sole discretion. As a Texas corporation, TB&T is subject to certain restrictions on dividends under the TBOC. Generally, a Texas corporation may pay dividends to its shareholders out of its surplus (the excess of its assets over its liabilities and stated capital) unless the corporation is insolvent or the payment of the dividend would render the corporation insolvent.

Consistent with its policy, as now codified, that bank holding companies should serve as a source of financial strength for their subsidiary banks, the Federal Reserve has stated that, as a matter of prudent banking, a

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bank holding company generally should not maintain a rate of dividends to shareholders unless its net income available has been sufficient to fully fund the dividends, and the prospective rate of earnings retention appears consistent with the bank holding company’s capital needs, asset quality and overall financial condition.

TB&T does not engage in separate business activities of a material nature. As a result, TB&T’s ability to pay dividends depends upon the dividends received from The Bank & Trust. As a Texas-chartered banking association, The Bank & Trust’s ability to pay dividends is restricted by certain laws and regulations. Under the Texas Finance Code, The Bank & Trust generally may not pay a dividend that would reduce its capital or surplus without the prior approval of the Texas Department of Banking. All dividends must be paid out of net profits then on hand, after deducting expenses, including losses and provisions for loan losses.

In addition to Texas law restrictions on The Bank & Trust’s ability to pay dividends, under the Federal Deposit Insurance Corporation Improvement Act, The Bank & Trust may not pay any dividend if the payment of the dividend would cause The Bank & Trust to become undercapitalized or if The Bank & Trust is “undercapitalized.” The FDIC may further restrict the payment of dividends by requiring that The Bank & Trust maintain a higher level of capital than would otherwise be required to be “adequately capitalized” for regulatory purposes. Moreover, if, in the opinion of the FDIC, The Bank & Trust is engaged in an unsound practice (which could include the payment of dividends), the FDIC may require that The Bank & Trust cease such practice. The federal bank regulatory agencies have indicated that paying dividends that deplete a depository institution’s capital base to an inadequate level would be an unsafe banking practice. Moreover, the federal bank regulatory agencies have issued policy statements providing that insured depository institutions generally should pay dividends only out of current operating earnings.

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DESCRIPTION OF FIRST FINANCIAL CAPITAL STOCK

General

First Financial has authorized 200,000,000 shares of First Financial common stock, par value $0.01 per share, 135,844,644 shares of which are outstanding as of October 29, 2019. The following summary is qualified in its entirety by reference to the certificate of formation and bylaws of First Financial.

First Financial common stock

The holders of First Financial common stock are entitled to one vote for each share of First Financial common stock owned. Holders of First Financial common stock may not cumulate their votes for the election of directors. Holders of First Financial common stock do not have preemptive rights to acquire any additional, unissued or treasury shares of First Financial. First Financial common stock is not convertible into any other security of First Financial and does not carry a right to subscribe to or acquire shares of First Financial.

Holders of First Financial common stock will be entitled to receive dividends out of funds legally available therefor, if and when properly declared by the First Financial board. On liquidation of First Financial, the holders of First Financial common stock are entitled to share pro rata in any distribution of the assets of First Financial after all other indebtedness of First Financial has been retired.

EXPERTS

The consolidated financial statements of First Financial Bankshares, Inc. appearing in First Financial Bankshares, Inc. Annual Report (Form10-K) for the year ended December 31, 2018, and the effectiveness of First Financial Bankshares, Inc. internal control over financial reporting as of December 31, 2018 have been audited by Ernst & Young LLP, independent registered public accounting firm, as set forth in their reports included therein, and incorporated herein by reference. Such consolidated financial statements are incorporated herein by reference in reliance upon such reports given on the authority of such firm as experts in accounting and auditing.

LEGAL MATTERS

The validity of the shares of First Financial common stock to be issued by First Financial in connection with the merger will be passed upon by Norton Rose Fulbright US LLP, Dallas, Texas. Certain U.S. federal income tax consequences relating to the mergers will also be passed upon for First Financial by Norton Rose Fulbright US LLP, Dallas, Texas, and for TB&T by Fenimore, Kay, Harrison & Ford, LLP, Austin, Texas.

OTHER MATTERS

As of the date of this proxy statement/prospectus, the board of directors of TB&T knows of no matters that will be presented for consideration at the special meeting of shareholders other than as described in this proxy statement/prospectus. However, if any other matters are properly brought before the special meeting or any adjournment or postponement thereof, it is intended that the proxies will act in accordance with their best judgment unless otherwise indicated in the appropriate box on the proxy.

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WHERE YOU CAN FIND MORE INFORMATION

First Financial files annual, quarterly and current reports, proxy statements and other information with the SEC. The SEC maintains an Internet site that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC, including First Financial, which can be accessed at http://www.sec.gov.

The SEC allows First Financial to “incorporate by reference” information in this proxy statement/prospectus. This means that First Financial can disclose important business and financial information to you by referring you to another document filed separately with the SEC. The information that First Financial incorporates by reference is considered to be part of this proxy statement/prospectus, and later information that First Financial files with the SEC will automatically update and supersede the information First Financial included in this proxy statement/prospectus. This document incorporates by reference the documents that are listed below that First Financial has previously filed with the SEC, except to the extent that any information contained in such filings is deemed “furnished” in connection with SEC rules.

First Financial SEC Filings (File Number:000-07674)

• Proxy Statement for Annual Meeting filed onMarch 1, 2019;

• Annual Report onForm10-K for the year ended December 31, 2018 filed onFebruary 19, 2019;

• Quarterly Reports on Form10-Q for the quarters ended March 31, 2019, June 30, 2019 and September 30, 2019 filed with the SEC onApril  30, 2019,July 30, 2019 and October 29, 2019, respectively;

• Current Reports on Form8-K filed onApril 24, 2019,July 1, 2019,September 20, 2019 and October 23, 2019; and

• The description of First Financial’s common stock, par value $0.01 per share, contained in First Financial’s Registration Statements on Form8-A datedJanuary  7, 1994 andNovember 21, 1995, including any amendment or report filed with the SEC for the purpose of updating such description.

First Financial also incorporates by reference any future filings it makes with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of this proxy statement/prospectus and before the meeting. Any statement contained in this proxy statement/prospectus or in a document incorporated or deemed to be incorporated by reference in this proxy statement/prospectus is deemed to be modified or superseded to the extent that a statement contained herein or in any subsequently filed document that also is, or is deemed to be, incorporated by reference herein modified or superseded such statement. Any statement so modified or superseded will not be deemed, except as so modified or superseded, to constitute a part of this proxy statement/prospectus.

Documents incorporated by reference are available from First Financial without charge (except for exhibits to the documents unless the exhibits are specifically incorporated in the document by reference). First Financial’s internet address is www.ffin.com. The information on First Financial’s website is not part of this proxy statement/prospectus. You may obtain copies of the information that First Financial files with the SEC, free of charge, by going to First Financial’s website under the “Investor Relations” tab. You may also obtain documents incorporated by reference in this document by requesting them in writing or by telephone from First Financial at the following address:

First Financial Bankshares, Inc.

400 Pine Street

Abilene, Texas 79601

Attention: Investor Relations

Telephone:(325) 625-7155

To obtain timely delivery, you must make a written or oral request for a copy of such information by November 25, 2019.

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First Financial has filed a registration statement on FormS-4 under the Securities Act with the SEC with respect to the First Financial common stock to be issued to shareholders of TB&T in the merger. This proxy statement/prospectus constitutes the prospectus of First Financial filed as part of the registration statement. This proxy statement/prospectus does not contain all of the information set forth in the registration statement because certain parts of the registration statement are omitted in accordance with the rules and regulations of the SEC. The registration statement and its exhibits are available for inspection and copying as set forth above.

You should rely only on the information contained in this proxy statement/prospectus. Neither First Financial nor TB&T has authorized anyone to provide you with different information. Therefore, if anyone gives you different or additional information, you should not rely on it. The information contained in this proxy statement/prospectus is correct as of its date. It may not continue to be correct after this date. TB&T has supplied all of the information about TB&T and The Bank & Trust contained in this proxy statement/prospectus and First Financial has supplied all of the information contained in this proxy statement/prospectus about First Financial and its subsidiaries. Each of us is relying on the correctness of the information supplied by the other.

This proxy statement/prospectus does not constitute an offer to sell, or a solicitation of an offer to purchase, the securities offered by this proxy statement/prospectus, or the solicitation of a proxy, in any jurisdiction to or from any person to whom or from it is unlawful to make such offer, solicitation of an offer or proxy solicitation in such jurisdiction.

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Appendix A

AGREEMENT AND PLAN OF REORGANIZATION

BY AND AMONG

FIRST FINANCIAL BANKSHARES, INC.

BRAZOS MERGER SUB, INC.

AND

TB&T BANCSHARES, INC.

Dated as of September 19, 2019

TABLE OF CONTENTS

		Page
ARTICLE I     THE MERGER			A-2
Section 1.01	Merger of Merger Sub with and into TBT		A-2
Section 1.02	Effects of the Merger		A-2
Section 1.03	Certificate of Formation and Bylaws		A-2
Section 1.04	Directors and Officers		A-2
Section 1.05	Effect on Capital Stock		A-2
Section 1.06	Exchange Procedures		A-3
Section 1.07	Tax Treatment		A-4
Section 1.08	Modification of Structure		A-5
Section 1.09	Dissenting Shareholders		A-5
Section 1.10	Second Step Merger		A-5
Section 1.11	Bank Merger		A-5
ARTICLE II     THE CLOSING AND THE CLOSING DATE			A-6
Section 2.01	Time and Place of the Closing and Closing Date		A-6
Section 2.02	Actions to be Taken at the Closing by TBT		A-6
Section 2.03	Actions to be Taken at the Closing by FFIN		A-7
ARTICLE III     REPRESENTATIONS AND WARRANTIES OF TBT			A-8
Section 3.01	Organization and Qualification		A-8
Section 3.02	Authority; Execution and Delivery		A-9
Section 3.03	Capitalization		A-9
Section 3.04	Compliance with Laws, Permits and Instruments		A-10
Section 3.05	Financial Statements		A-10
Section 3.06	Undisclosed Liabilities		A-11
Section 3.07	Litigation		A-11
Section 3.08	Consents and Approvals		A-12
Section 3.09	Title to Assets		A-12
Section 3.10	Absence of Certain Changes or Events		A-12
Section 3.11	Leases, Contracts and Agreements		A-14
Section 3.12	Taxes		A-15
Section 3.13	Insurance		A-17
Section 3.14	No Material Adverse Change		A-17
Section 3.15	Proprietary Rights		A-17
Section 3.16	Transactions with Certain Persons and Entities		A-18
Section 3.17	Evidences of Indebtedness		A-18
Section 3.18	Condition of Assets		A-18
Section 3.19	Environmental Compliance		A-18
Section 3.20	Regulatory Compliance		A-19
Section 3.21	Absence of Certain Business Practices		A-20
Section 3.22	Books and Records		A-20
Section 3.23	Forms of Instruments, Etc		A-20
Section 3.24	Fiduciary Responsibilities		A-20
Section 3.25	Guaranties		A-20
Section 3.26	Voting Trust, Voting Agreements or Shareholders’ Agreements		A-20
Section 3.27	Employee Relationships		A-20
Section 3.28	Employee Benefit Plans		A-21
Section 3.29	Obligations to Employees		A-24

A-i

TABLE OF CONTENTS

(continued)

		Page
Section 3.30	Interest Rate Risk Management Instruments		A-24
Section 3.31	Internal Controls		A-24
Section 3.32	Community Reinvestment Act		A-25
Section 3.33	Fair Housing Act, Home Mortgage Disclosure Act, Real Estate Settlement Procedures Act and Equal Credit Opportunity Act		A-25
Section 3.34	Usury Laws and Other Consumer Compliance Laws		A-25
Section 3.35	Bank Secrecy Act, Foreign Corrupt Practices Act and U.S.A		A-25
Section 3.36	Unfair, Deceptive or Abusive Acts or Practices		A-25
Section 3.37	Proxy Statement/Prospectus		A-25
Section 3.38	Agreements Between TBT and its Subsidiaries; Claims		A-26
Section 3.39	Representations Not Misleading		A-26
Section 3.40	State Takeover Laws		A-26
Section 3.41	Opinion of Financial Advisor		A-26
Section 3.42	No Other Representations or Warranties		A-26
ARTICLE IV     REPRESENTATIONS AND WARRANTIES OF FFIN			A-26
Section 4.01	Organization and Qualification		A-27
Section 4.02	Execution and Delivery		A-27
Section 4.03	Capitalization		A-28
Section 4.04	SEC Filings; Financial Statements		A-28
Section 4.05	Compliance with Laws, Permits and Instruments		A-28
Section 4.06	Undisclosed Liabilities		A-29
Section 4.07	Litigation		A-29
Section 4.08	Consents and Approvals		A-29
Section 4.09	Regulatory Compliance		A-30
Section 4.10	Proxy Statement/Prospectus		A-30
Section 4.11	Absence of Certain Changes		A-30
Section 4.12	FFIN Disclosure Controls and Procedures		A-30
Section 4.13	Taxes		A-31
Section 4.14	Employee Benefit Plans		A-31
Section 4.15	Representations Not Misleading		A-32
Section 4.16	No Other Representations or Warranties		A-32
ARTICLE V     COVENANTS OF TBT			A-32
Section 5.01	Commercially Reasonable Efforts		A-32
Section 5.02	Shareholders’ Meeting		A-32
Section 5.03	Information Furnished by TBT		A-33
Section 5.04	Required Acts		A-33
Section 5.05	Prohibited Acts		A-34
Section 5.06	Access;Pre-Closing Investigation		A-35
Section 5.07	Additional Financial Statements and Tax Returns		A-36
Section 5.08	Untrue Representations		A-36
Section 5.09	Litigation and Claims		A-36
Section 5.10	Material Adverse Changes		A-36
Section 5.11	Consents and Approvals		A-36
Section 5.12	Environmental Investigation; Right to Terminate Agreement		A-37
Section 5.13	Registration Statement and Proxy Statement/Prospectus		A-37
Section 5.14	Benefit Plans		A-38

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TABLE OF CONTENTS

(continued)

		Page
Section 5.15	Termination of Contracts		A-38
Section 5.16	Conforming Accounting Adjustments		A-39
Section 5.17	Tail D&O Policy		A-39
Section 5.18	Regulatory and Other Approvals		A-39
Section 5.19	Tax Matters		A-39
Section 5.20	Tax-free Reorganization		A-40
Section 5.21	Disclosure Schedules		A-40
Section 5.22	Transition		A-40
Section 5.23	Voting Agreement		A-40
Section 5.24	Director Support Agreements		A-41
Section 5.25	Employment Agreement		A-41
Section 5.26	Execution of Releases		A-41
Section 5.27	No Solicitation		A-41
Section 5.28	TBT Option Vesting, Exercise and Cancellation		A-41
Section 5.29	Repayment and Termination of Bank Stock Loan		A-41
Section 5.30	Warrant Exercise		A-41
ARTICLE VI     COVENANTS OF FFIN			A-42
Section 6.01	Commercially Reasonable Efforts		A-42
Section 6.02	Regulatory Filings and Registration Statement		A-42
Section 6.03	Untrue Representations		A-42
Section 6.04	Litigation and Claims		A-42
Section 6.05	Material Adverse Changes		A-43
Section 6.06	Consents and Approvals		A-43
Section 6.07	Employee Matters		A-43
Section 6.08	Conduct of Business in the Ordinary Course		A-44
Section 6.09	Disclosure Schedules		A-44
Section 6.10	No Control of Other Party’s Business		A-44
Section 6.11	Nasdaq Listing		A-44
Section 6.12	Indemnification		A-44
Section 6.13	Tax Matters		A-45
Section 6.14	Tax-free Reorganization		A-45
Section 6.15	Access;Pre-Closing Investigation		A-45
ARTICLE VII     CONDITIONS PRECEDENT TO THE OBLIGATIONS OF TBT			A-46
Section 7.01	Representations and Warranties		A-46
Section 7.02	Performance of Obligations		A-46
Section 7.03	Shareholder Approvals		A-46
Section 7.04	Government and Other Approvals		A-46
Section 7.05	No Litigation		A-46
Section 7.06	Delivery of Closing Documents		A-46
Section 7.07	No Material Adverse Change		A-46
Section 7.08	Registration Statement		A-47
Section 7.09	Nasdaq Listing		A-47
Section 7.10	Federal Tax Opinion		A-47
ARTICLE VIII     CONDITIONS PRECEDENT TO THE OBLIGATIONS OF FFIN AND MERGER SUB			A-47
Section 8.01	Representations and Warranties		A-47

A-iii

TABLE OF CONTENTS

(continued)

		Page
Section 8.02	Performance of Obligations		A-47
Section 8.03	Shareholder Approval		A-47
Section 8.04	Government and Other Approvals		A-47
Section 8.05	No Litigation		A-48
Section 8.06	Releases		A-48
Section 8.07	No Material Adverse Change		A-48
Section 8.08	Termination of Employee Plans		A-48
Section 8.09	Voting Agreements		A-48
Section 8.10	Director Support Agreements		A-48
Section 8.11	Employment Agreements		A-48
Section 8.12	Registration Statement		A-48
Section 8.13	Dissenting Shareholders		A-48
Section 8.14	Delivery of Closing Documents		A-49
Section 8.15	TBT Options		A-49
Section 8.16	FIRPTA Certificate		A-49
Section 8.17	Federal Tax Opinion		A-49
Section 8.18	Repayment and Termination of Bank Stock Loan		A-49
Section 8.19	TBT Warrants		A-49
ARTICLE IX     TERMINATION			A-49
Section 9.01	Right of Termination		A-49
Section 9.02	Notice of Termination		A-51
Section 9.03	Effect of Termination		A-51
ARTICLE X     MISCELLANEOUS			A-51
Section 10.01	Survival of Representations, Warranties, Covenants and Agreements		A-51
Section 10.02	Expenses		A-51
Section 10.03	Brokerage Fees and Commissions		A-51
Section 10.04	Entire Agreement		A-51
Section 10.05	Binding Effect; Assignment		A-51
Section 10.06	Further Cooperation		A-52
Section 10.07	Severability		A-52
Section 10.08	Notices		A-52
Section 10.09	GOVERNING LAW		A-53
Section 10.10	WAIVER OF JURY TRIAL		A-53
Section 10.11	Multiple Counterparts		A-53
Section 10.12	Definitions		A-53
Section 10.13	Specific Performance		A-58
Section 10.14	Attorneys’ Fees and Costs		A-58
Section 10.15	Rules of Construction		A-59
Section 10.16	Articles, Sections, Exhibits and Schedules		A-59
Section 10.17	Public Disclosure		A-59
Section 10.18	Extension; Waiver		A-59
Section 10.19	Amendment		A-59
Section 10.20	No Third Party Beneficiaries		A-59

A-iv

AGREEMENT AND PLAN OF REORGANIZATION

This AGREEMENT AND PLAN OF REORGANIZATION (this “Agreement”) is dated as of September 19, 2019, by and among First Financial Bankshares, Inc., a Texas corporation and registered bank holding company under the Bank Holding Company Act of 1956, as amended (the “BHCA”), with its principal offices in Abilene, Texas (“FFIN”), Brazos Merger Sub, Inc., a Texas corporation and wholly owned subsidiary of FFIN (“Merger Sub”), and TB&T Bancshares, Inc., a Texas corporation and registered bank holding company under the BHCA (“TBT”). An index of defined terms is included inSection 10.12.

RECITALS

WHEREAS, TBT owns all of the capital stock of The Bank & Trust of Bryan/College Station, a Texas banking association with its principal office in Bryan, Texas (the “Bank”);

WHEREAS, FFIN owns all of the capital stock of First Financial Bank, National Association, a national association with its principal offices in Abilene, Texas (“FFB”);

WHEREAS, the board of directors of FFIN (the “FFIN Board”) and the board of directors of TBT (the “TBT Board”) have determined that it is advisable and in the best interests of their respective companies and their shareholders to consummate the business combination transaction provided for in this Agreement;

WHEREAS, on the terms and subject to the conditions set forth in this Agreement, FFIN will acquire TBT for fixed aggregate consideration of 6,275,806 shares of common stock, par value $0.01 per share, of FFIN (the “FFIN Stock”), through the merger of Merger Sub with and into TBT, with TBT surviving the merger (the “Merger”) as a wholly owned subsidiary of FFIN;

WHEREAS, immediately following, and in connection with, the Merger, FFIN will cause TBT to be merged with and into FFIN, with FFIN surviving the merger (the “Second Step Merger” and together with the Merger, the “Integrated Mergers”), and immediately following the Second Step Merger, or at such later time as FFIN may determine, FFIN will cause the Bank to be merged with and into FFB, with FFB surviving the merger (the “Bank Merger”);

WHEREAS, it is intended that the Integrated Mergers together will be treated as a reorganization under Section 368(a) of the Internal Revenue Code of 1986, as amended (the “Code”), and the rules and regulations promulgated thereunder and that this Agreement and the merger agreement for the Second Step Merger, taken together, constitute and are hereby adopted as a plan of reorganization for the purposes of Sections 354 and 361 of the Code and the applicable regulations;

WHEREAS, FFIN and TBT have agreed that TBT may, on the terms and subject to the conditions set forth in this Agreement, pay dividends to its shareholders in an amount of up to $2,000,000 prior to Closing;

WHEREAS, FFIN and TBT have agreed that they will make, or enter into agreements to make, certain retention and bonus payments to employees, directors and certain other Persons in an amount of up to $3,000,000 on the terms and subject to the conditions set forth in this Agreement; and

WHEREAS, the parties hereto desire to set forth certain representations, warranties and covenants made by each to the other as an inducement to the execution and delivery of this Agreement and certain additional agreements related to the transactions contemplated hereby:

AGREEMENT

NOW, THEREFORE, for and in consideration of the foregoing and of the mutual representations, warranties, covenants and agreements contained in this Agreement, and other good and valuable consideration,

the receipt and sufficiency of which are hereby acknowledged, and subject to the conditions set forth below, the parties, intending to be legally bound, undertake, promise, covenant and agree with each other as follows:

ARTICLE I

THE MERGER

Section 1.01    Merger of Merger Sub with and into TBT. Subject to the terms and conditions of this Agreement, at the Effective Time, Merger Sub will merge with and into TBT in accordance with the provisions of Chapter 10 of the Texas Business Organizations Code (the “TBOC”). TBT will be the surviving corporation in the Merger (the “Surviving Corporation”) and will continue its corporate existence under the TBOC as a wholly owned subsidiary of FFIN. Upon consummation of the Merger, the separate corporate existence of Merger Sub shall terminate.

Section 1.02    Effects of the Merger. The Merger will have the effects set forth in Section 10.008 of the TBOC. The name of the Surviving Corporation will be “TB&T Bancshares, Inc.”

Section 1.03    Certificate of Formation and Bylaws. The certificate of formation and bylaws of TBT, as in effect immediately before the Effective Time, will be the certificate of formation and bylaws of the Surviving Corporation until thereafter changed or amended as provided by applicable Law.

Section 1.04    Directors and Officers. The directors and officers, respectively, of Merger Sub at the Effective Time will become the directors and officers of the Surviving Corporation and will hold office from the Effective Time until their respective successors are duly elected or appointed and qualified in the manner provided in the certificate of formation and bylaws of the Surviving Corporation or as otherwise provided by Law.

Section 1.05    Effect on Capital Stock. At the Effective Time, by virtue of the Merger and without any further action on the part of FFIN, TBT, Merger Sub or any holder of record of the following securities:

(a)    Each share of FFIN Stock outstanding prior to the Effective Time shall remain one validly issued, fully paid and nonassessable share of FFIN Stock after the Effective Time.

(b)    Except for the Cancelled Shares and Dissenting Shares, each share of common stock, par value $1.00 per share, of TBT (the “TBT Stock”) that is issued and outstanding immediately prior to the Effective Time shall cease to be outstanding and shall automatically be converted into and become the right to receive, without interest, 1.2502 shares of FFIN Stock (the “Exchange Ratio” and such shares, the “Merger Consideration”).

(c)    No certificates representing a fractional share shall be issued by FFIN. In lieu of any fractional share, each holder of TBT Stock entitled to a fractional share, upon surrender of such shares of TBT Stock, shall be entitled to receive from FFIN an amount in cash (without interest), payable in accordance withSection 1.06, rounded to the nearest cent, determined by multiplying the fractional share by $30.28.

(d)    All shares of TBT Stock to be converted into the right to receive the Merger Consideration pursuant to thisSection 1.05 shall no longer be outstanding and shall automatically be cancelled and cease to exist, and each holder of a certificate that immediately prior to the Effective Time represented any such shares of TBT Stock shall thereafter cease to have any rights with respect to such shares of TBT Stock, except the right to receive the Merger Consideration.

(e)    Any shares of TBT Stock that are owned immediately prior to the Effective Time by TBT, FFIN or their respective Subsidiaries (other than (i) shares of TBT Stock held, directly or indirectly, in trust accounts, managed accounts and the like or otherwise held in a fiduciary capacity that are beneficially

A-2

owned by third parties, and (ii) shares of TBT Stock held in respect of a debt previously contracted) shall be canceled and extinguished without any conversion thereof or consideration therefor (the “Cancelled Shares”).

(f)    Each share of common stock, par value $0.01 per share, of Merger Sub issued and outstanding immediately prior to the Effective Time shall be converted automatically into and become one newly issued, fully paid andnon-assessable share of common stock of the Surviving Corporation.

(g)    If, prior to the Effective Time, the outstanding shares of FFIN Stock or TBT Stock shall have been increased, decreased, changed into or exchanged for a different number or kind of shares or securities as a result of a reorganization, recapitalization, reclassification, stock dividend, stock split, reverse stock split, or other similar change in capitalization, or there shall be any extraordinary dividend or distribution, an appropriate and proportionate adjustment shall be made to the Exchange Ratio.

Section 1.06    Exchange Procedures.

(a)    Prior to the Effective Time, FFIN shall appoint an exchange agent (the “Exchange Agent”) to act as the exchange agent hereunder.

(b)    At or promptly after the Effective Time, FFIN shall deposit with or make available to the Exchange Agent for exchange in accordance with thisSection 1.06, the certificates or, at FFIN’s option, evidence of shares in book entry form, representing the shares of FFIN Stock to be issued to holders of TBT Stock pursuant toSection 1.05(b) and any cash payable in lieu of fractional shares (collectively, the “Exchange Fund”).

(c)    No later than five (5) Business Days after the Effective Time and subject to FFIN’s receipt of a list of TBT’s shareholders in a format that is reasonably acceptable to the FFIN, FFIN shall, or shall cause the Exchange Agent to, mail to each holder of record immediately prior to the Effective Time of certificates (other than with respect to Cancelled Shares and Dissenting Shares) representing shares of TBT Stock (each, a “Certificate,” it being understood that any reference herein to a “Certificate” shall be deemed to include reference to book-entry account statements relating to the ownership of shares of TBT Stock), (i) a letter of transmittal (which shall specify that delivery shall be effected, and risk of loss and title to each Certificate shall pass, only upon delivery of such Certificate (or an affidavit of loss in lieu of such Certificate and, if reasonably required by FFIN or the Exchange Agent, the posting by such holder of TBT Stock of a bond in such amount as FFIN may determine is reasonably necessary as indemnity against any claim that may be made against it with respect to such Certificate; provided, that the amount of such bond may not exceed the aggregate amount of such shareholder’s portion of the Merger Consideration)) to the Exchange Agent and shall be substantially in such form and have such other provisions as shall be prescribed by the Exchange Agent (the “Letter of Transmittal”), and (ii) instructions for use in surrendering each Certificate in exchange for the Merger Consideration, any cash in lieu of a fractional share of FFIN Stock to be issued or paid in consideration therefor and any dividends or distributions to which such holder is entitled pursuant to thisSection 1.06. The TBT shareholders will be entitled to receive their Merger Consideration only after receipt by the Exchange Agent of a properly completed Letter of Transmittal. If a Letter of Transmittal contains an error, is incomplete or is not accompanied by all appropriate Certificates, then the Exchange Agent will notify that TBT shareholder promptly of the need for further information or documentation.

(d)    Within five (5) Business Days after surrender to the Exchange Agent of its Certificate or Certificates, accompanied by a properly completed Letter of Transmittal, or within five (5) Business Days after the Effective Time for any uncertificated shares of TBT Stock held of record in book-entry form (subject to receipt of any customary tax documentation that may be reasonably requested by the Exchange Agent), the Exchange Agent shall deliver to such holder of TBT Stock the Merger Consideration and any cash in lieu of a fractional share of FFIN Stock to be issued or paid in consideration therefor in respect of the shares of TBT Stock represented by such holder’s Certificate or Certificates, and each Certificate surrendered will be canceled. FFIN may, at its option, deliver any shares of FFIN Stock in book-entry form. Until so surrendered, each Certificate shall represent after the Effective Time, for all purposes, only the right to

A-3

receive, without interest, the Merger Consideration and any cash in lieu of a fractional share of FFIN Stock to be issued or paid in consideration therefor upon surrender of such Certificate in accordance with thisSection 1.06, and any dividends or distributions to which such holder is entitled pursuant to thisSection 1.06. Notwithstanding anything to the contrary herein, no Certificate or Certificates shall be deemed surrendered to the Exchange Agent prior to the Effective Time.

(e)    No dividends or other distributions with respect to FFIN Stock shall be paid to the holder of any unsurrendered Certificate with respect to the shares of FFIN Stock represented thereby, in each case unless and until the surrender of such Certificate in accordance with thisSection 1.06. However, upon surrender of such Certificate, the Merger Consideration, together with all such undelivered dividends or other distributions without interest, shall be delivered and paid with respect to each share represented by such Certificate. Subject to the effect of applicable abandoned property, escheat or similar Laws, following surrender of any such Certificate in accordance with thisSection 1.06, the record holder thereof shall be entitled to receive, without interest, (i) the amount of dividends or other distributions, if any, with a record date at or after the Effective Time that are payable with respect to the whole shares of FFIN Stock issuable with respect to such Certificate and not paid, and (ii) at the appropriate payment date, the amount of dividends or other distributions payable with respect to shares of FFIN Stock issuable with respect to such Certificate with a record date after the Effective Time (but before such surrender date) and with a payment date subsequent to the issuance of the FFIN Stock issuable with respect to such Certificate.

(f)    In the event of a transfer of ownership of a Certificate representing TBT Stock prior to the Effective Time that is not registered in the stock transfer records of TBT, the Merger Consideration and any cash in lieu of a fractional share of FFIN Stock to be issued or paid in consideration therefor shall be issued or paid in exchange therefor to a Person other than the Person in whose name the Certificate so surrendered is registered if the Certificate formerly representing such TBT Stock shall be properly endorsed or otherwise be in proper form for transfer and the Person requesting such payment or issuance shall pay any transfer or other similar Taxes required by reason of the payment or issuance to a Person other than the registered holder of the Certificate or establish to the satisfaction of FFIN and the Exchange Agent that the Tax has been paid or is not applicable.

(g)    FFIN and the Exchange Agent, as the case may be, shall be entitled to deduct and withhold, if necessary, from any consideration otherwise payable pursuant to this Agreement to any Person such amounts as FFIN or the Exchange Agent, as the case may be, is required to deduct and withhold under the Code, or any provision of state, local or foreign tax law, with respect to the making of such payment. To the extent that amounts are so withheld by FFIN or the Exchange Agent, as the case may be, and remitted to the appropriate Governmental Entity, such withheld amounts shall be treated for all purposes of this Agreement as having been paid to such Person in respect of which such deduction and withholding was made by FFIN or the Exchange Agent, as the case may be.

(h)    Any portion of the Exchange Fund that remains unclaimed by the shareholders of TBT at the expiration of six (6) months after the Effective Time shall be paid to FFIN. In such event, any former shareholders of TBT who have not theretofore complied with thisSection 1.06 shall thereafter look only to FFIN with respect to the Merger Consideration, any cash in lieu of any fractional shares and any unpaid dividends and distributions on the FFIN Stock deliverable in respect of each share represented by a Certificate such shareholder holds as determined pursuant to this Agreement, in each case, without any interest thereon.

(i)    Any other provision of this Agreement notwithstanding, none of FFIN, the Surviving Corporation or the Exchange Agent shall be liable to a holder of TBT Stock for any amounts paid or property delivered in good faith to a public official pursuant to any applicable abandoned property, escheat or similar law.

Section 1.07    Tax Treatment. For U.S. federal income Tax purposes, it is intended that the Integrated Mergers together be treated as a single integrated transaction that qualifies as a “reorganization” within the meaning of Section 368(a) of the Code, and that this Agreement and the merger agreement for the Second Step

A-4

Merger, shall constitute, and are hereby adopted as, a “plan of reorganization” within the meaning of Treasury RegulationSection 1.368-2(g). From and after the date of this Agreement and until the Closing Date, each party hereto shall use its reasonable best efforts to cause the Integrated Mergers to so qualify, and will not knowingly take any action, cause any action to be taken, fail to take any action or cause any action not to be taken, which action or failure to act could reasonably be expected to prevent the Integrated Mergers from qualifying as a “reorganization” within the meaning of Section 368(a) of the Code.

Section 1.08    Modification of Structure. Notwithstanding any provision of this Agreement to the contrary, FFIN may elect, subject to the filing of all necessary applications and the receipt of all required regulatory approvals, to modify the structure of the transactions contemplated hereby so long as (i) there are no material adverse federal or state income tax consequences to the holders of TBT Stock as a result of such modification (taken as a whole and not with respect to any individual holder), (ii) the after tax consideration to be paid to the holders of TBT Stock is not changed in kind or reduced in amount, and (iii) such modification will not be likely to materially delay or jeopardize receipt of any required regulatory approvals or the Closing.

Section 1.09    Dissenting Shareholders. Notwithstanding anything in this Agreement to the contrary, each share of TBT Stock that is outstanding immediately prior to the Effective Time and that is held by shareholders (“Dissenting Shares”) who have not voted such shares in favor of this Agreement, the Merger and the transactions contemplated hereby and who will have otherwise complied with the terms and provisions of Chapter 10, Subchapter H of the TBOC will be entitled to those rights and remedies set forth in Chapter 10, Subchapter H of the TBOC; but if a shareholder fails to perfect, withdraws or otherwise loses any such right or remedy granted by the TBOC, each such Dissenting Shares shall be deemed to have been converted into and to have become exchangeable for, the right to receive the Merger Consideration without any interest thereon in accordance with the provisions of thisArticle I.

Section 1.10    Second Step Merger. As soon as reasonably practicable following the Effective Time, in accordance with the TBOC, FFIN shall cause the Surviving Corporation to be merged with and into FFIN in the Second Step Merger, with FFIN surviving the Second Step Merger and continuing its existence under the Laws of the State of Texas, and the separate corporate existence of the Surviving Corporation ceasing as of the Second Effective Time. In furtherance of the foregoing, FFIN shall cause to be filed with the Texas Secretary of State, in accordance with the TBOC, a certificate of merger relating to the Second Step Merger (the “Second Certificate of Merger”). The Second Step Merger shall become effective as of the date and time specified in the Second Certificate of Merger (such date and time, the “Second Effective Time”). At and after the Second Effective Time, the Second Step Merger shall have the effects set forth in the applicable provisions of the TBOC.

Section 1.11    Bank Merger. Immediately following the Second Step Merger, or at such later time as FFIN may determine in its sole discretion, FFIN will cause the Bank Merger on the terms and subject to the terms and conditions set forth in the Bank Merger Agreement attached hereto asExhibit“A” (the “Bank Merger Agreement”). FFB shall be the surviving entity in the Bank Merger and, following the Bank Merger, the separate corporate existence of the Bank shall cease. The parties agree that the Bank Merger will become effective immediately after the Second Effective Time or at such later time as FFIN may determine. Prior to or on the date of this Agreement, the board of directors each of FFB and the Bank have approved the Bank Merger Agreement and FFB and the Bank entered into the Bank Merger Agreement. In furtherance of the foregoing, the parties shall execute and cause to be filed applicable articles or certificates of merger and such other documents as are necessary to effectuate the Bank Merger.

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ARTICLE II

THE CLOSING AND THE CLOSING DATE

Section 2.01    Time and Place of the Closing and Closing Date.

(a)    On a date mutually acceptable to FFIN and TBT within thirty (30) days after the receipt of all necessary regulatory, corporate and other approvals and the expiration of any mandatory waiting periods (the “Closing Date”), as may be extended by mutual agreement of the parties, a meeting will take place at which the parties to this Agreement will exchange certificates, letters and other documents in order to determine whether all of the conditions set forth inArticle VII andArticle VIII have been satisfied or waived or whether any condition exists that would permit a party to this Agreement to terminate this Agreement. If none of the foregoing conditions then exists or if no party elects to exercise any right it may have to terminate this Agreement, then the parties will execute such documents and instruments as may be necessary or appropriate in order to effect the Merger and the other transactions contemplated by this Agreement (the “Closing”).

(b)    The Merger and other transactions contemplated by this Agreement shall become effective on the date and at the time specified in the certificate of merger (the “Certificate of Merger”), reflecting the Merger, filed with the Texas Secretary of State in accordance with the TBOC (the “Effective Time”). The parties will use their commercially reasonable efforts to cause the Effective Time to occur on the same date as the Closing Date, but in no event will the Effective Time occur more than one (1) day after the Closing Date.

(c)    The Closing will take place at the offices of Norton Rose Fulbright US LLP, 2200 Ross Avenue, Suite 3600, Dallas, Texas 75201 at 10:00 a.m. on the Closing Date, or at such other time and place to which the parties may agree.

Section 2.02    Actions to be Taken at the Closing by TBT. At the Closing, TBT will execute and acknowledge, or cause to be executed and acknowledged, and deliver to FFIN such documents and certificates contemplated to be delivered pursuant to this Agreement or reasonably necessary to evidence the transactions contemplated by this Agreement, including the following (all of such actions constituting conditions precedent to the obligations of FFIN to close hereunder):

(a)    True, correct and complete copies of TBT’s certificate of formation and all amendments thereto, duly certified as of a recent date by the Texas Secretary of State;

(b)    True, correct and complete copies of the Bank’s certificate of formation and all amendments thereto, duly certified as of a recent date by the Texas Department of Banking (“TDB”);

(c)    A certificate of account status, dated as of a recent date, issued by the Texas Comptroller of Public Accounts (the “TCPA”), duly certifying as to the good standing of TBT under the Laws of the State of Texas;

(d)    A certificate of existence of the Bank, dated as of a recent date, issued by the TDB;

(e)    A certificate, dated as of a recent date, issued by the Federal Deposit Insurance Corporation (the “FDIC”), duly certifying that the deposits of the Bank are insured by the FDIC pursuant to the Federal Deposit Insurance Act, as amended (the “FDIA”);

(f)    A letter, dated as of a recent date, from the Federal Reserve Bank of Dallas, to the effect that TBT is a registered bank holding company under the BHCA;

(g)    A certificate, dated as of the Closing Date, executed by the secretary or other appropriate executive officer of TBT, pursuant to which such officer will certify: (i) the due adoption by the TBT Board of corporate resolutions attached to such certificate authorizing the execution and delivery of this Agreement and the other agreements and documents contemplated hereby and the taking of all actions contemplated hereby and thereby; (ii) the due adoption and approval by the shareholders of TBT of this Agreement;

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(iii) the incumbency and true signatures of those officers of TBT duly authorized to act on its behalf in connection with the transactions contemplated by this Agreement and to execute and deliver this Agreement and other agreements and documents contemplated hereby and thereby; (iv) that the copy of the bylaws of TBT attached to such certificate is true and correct and such bylaws have not been amended except as reflected in such copy; and (v) a true and correct copy of the list of the holders of TBT Stock as of the Closing Date;

(h)    A certificate, dated as of the Closing Date, executed by the secretary or other appropriate executive officer of the Bank, pursuant to which such officer will certify: (i) the due adoption by the board of directors of the Bank of corporate resolutions attached to such certificate authorizing the execution and delivery of the Bank Merger Agreement and the other agreements and documents contemplated thereby and the taking of all actions contemplated thereby; (ii) the due adoption by the sole shareholder of the Bank of resolutions authorizing the Bank Merger, the Bank Merger Agreement and the transactions contemplated by the Bank Merger Agreement; (iii) the incumbency and true signatures of those officers of the Bank duly authorized to act on its behalf in connection with the transactions contemplated by the Bank Merger Agreement and to execute and deliver the Bank Merger Agreement and the other agreements and documents contemplated hereby and thereby; and (iv) that the copy of the bylaws of the Bank attached to such certificate is true and correct and such bylaws have not been amended except as reflected in such copy;

(i)    A certificate, dated as of the Closing Date, executed by the chief executive officer of TBT, pursuant to which TBT will certify that (i) TBT has satisfied the conditions set forth inSections 8.01 and8.02; and (ii) except as expressly permitted by this Agreement, there has been no Material Adverse Change with respect to TBT or any of its Subsidiaries, individually or in the aggregate, since the date of this Agreement;

(j)    All consents required from third parties to complete the transactions contemplated by this Agreement, including those listed onConfidential Schedule 2.02(j);

(k)    All releases as required underSection 8.06;

(l)    TBT shall have delivered to FFIN a duly executed certificate in form and substance as prescribed by Treasury Regulations promulgated under Section 1445 of the Code, stating that TBT is not, and has not been, during the relevant period specified in Section 897(c)(1)(A)(ii) of the Code, a “United States real property holding corporation” within the meaning of Section 897(c) of the Code; and

(m)    All other documents required to be delivered to FFIN under this Agreement, and all other documents, certificates and instruments as are reasonably requested by FFIN or its counsel.

Section 2.03    Actions to be Taken at the Closing by FFIN. At the Closing, FFIN will execute and acknowledge, or cause to be executed and acknowledged, and deliver to TBT such documents and certificates contemplated to be delivered pursuant to this Agreement or reasonably necessary to evidence the transactions contemplated by this Agreement, including the following (all of such actions constituting conditions precedent to the obligations of TBT to close hereunder):

(a)    True, correct and complete copies of FFIN’s certificate of formation and all amendments thereto, duly certified as of a recent date by the Texas Secretary of State;

(b)    A certificate of account status, dated as of a recent date, issued by the TCPA, duly certifying as to the good standing of FFIN under the Laws of the State of Texas;

(c)    A letter, dated as of a recent date, from the Federal Reserve Bank of Dallas, to the effect that FFIN is a registered bank holding company under the BHCA;

(d)    A certificate, dated as of the Closing Date, executed by the Corporate Secretary or other appropriate executive officer of FFIN, pursuant to which such officer will certify: (i) the due adoption by the FFIN Board of corporate resolutions attached to such certificate authorizing the execution and delivery of this Agreement and the other agreements and documents contemplated hereby, and the taking of all actions contemplated hereby and thereby; (ii) the incumbency and true signatures of those officers of FFIN duly

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authorized to act on its behalf in connection with the transactions contemplated by this Agreement and to execute and deliver this Agreement and other agreements and documents contemplated hereby and thereby; and (iii) that the copy of the bylaws of FFIN attached to such certificate is true and correct and such bylaws have not been amended except as reflected in such copy;

(e)    A certificate, dated as of the Closing Date, executed by the secretary or other appropriate executive officer of FFB, pursuant to which such officer will certify: (i) the due adoption by the board of directors of FFB of corporate resolutions attached to such certificate authorizing the execution and delivery of the Bank Merger Agreement and the other agreements and documents contemplated thereby and the taking of all actions contemplated thereby; (ii) the due adoption by the sole shareholder of FFB of resolutions authorizing the Bank Merger, the Bank Merger Agreement and the transactions contemplated by the Bank Merger Agreement; (iii) the incumbency and true signatures of those officers of FFB duly authorized to act on its behalf in connection with the transactions contemplated by the Bank Merger Agreement and to execute and deliver the Bank Merger Agreement and the other agreements and documents contemplated thereby; and (iv) that the copy of the bylaws of FFB attached to such certificate is true and correct and such bylaws have not been amended except as reflected in such copy;

(f)    A certificate, dated as of the Closing Date, executed by the chief executive officer of FFIN, pursuant to which FFIN will certify that (i) FFIN has satisfied the conditions set forth inSections 7.01 and7.02; and (ii) except as expressly permitted by this Agreement, there has been no Material Adverse Change with respect to FFIN or any of its Subsidiaries, individually or in the aggregate, since the date of this Agreement;

(g)    All consents required from third parties to complete the transactions contemplated by this Agreement, including those listed onConfidential Schedule 2.03(g); and

(h)    All other documents required to be delivered to TBT by FFIN or Merger Sub under this Agreement, and all other documents, certificates and instruments as are reasonably requested by TBT or its counsel.

ARTICLE III

REPRESENTATIONS AND WARRANTIES OF TBT

Except as disclosed in the disclosure schedules delivered by TBT to FFIN prior to the execution hereof; provided, that (a) no such item is required to be set forth as an exception to a representation or warranty if its absence would not result in the related representation or warranty being deemed untrue or incorrect, (b) the mere inclusion of an item in the disclosure schedules as an exception to a representation or warranty shall not be deemed an admission by TBT of liability or that such item represents a material exception or fact, event or circumstance or that such item is reasonably likely to result in a Material Adverse Change or to represent a determination that such item did not arise in the ordinary course of business, and (c) any disclosures made with respect to a section of thisArticle III shall be deemed to qualify (1) any other section of thisArticle III specifically referenced or cross-referenced, and (2) other sections of thisArticle III to the extent it is reasonably apparent on its face (notwithstanding the absence of a specific cross reference) from a reading of the disclosure that such disclosure applies to such other sections, TBT hereby represents and warrants to FFIN as follows:

Section 3.01    Organization and Qualification.

(a)    TBT is a corporation, duly organized, validly existing and in good standing under the Laws of the State of Texas and is a bank holding company registered under the BHCA. TBT has the corporate power and authority (including all licenses, franchises, permits and other governmental authorizations as are legally required) to carry on its business as now being conducted, to own, lease and operate its properties and assets as now owned, leased or operated and to enter into and carry out its obligations under this Agreement. True and complete copies of the certificate of formation and bylaws of TBT, as amended to date, have been made available to FFIN. Except as set forth inConfidential Schedule 3.01(a), TBT does not own or control any

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Affiliate or Subsidiary, other than the Bank. The nature of the business of TBT and its activities do not require it to be qualified to do business in any jurisdiction other than the State of Texas, except where the failure to be so qualified has not had and is not reasonably likely to have a Material Adverse Change on TBT. Except as set forth inConfidential Schedule 3.01(a), TBT has no equity interest, direct or indirect, in any other bank or corporation or in any partnership, joint venture or other business enterprise or entity, other than the Bank or as acquired through settlement of indebtedness, foreclosure, the exercise of creditors’ remedies or in a fiduciary capacity, and the business carried on by TBT has not been conducted through any other direct or indirect Subsidiary or Affiliate of TBT other than the Bank.

(b)    The Bank is a Texas banking association, duly organized and validly existing under the Laws of the State of Texas and in good standing under the Laws of the State of Texas. The Bank has the corporate power and authority (including all licenses, franchises, permits and other governmental authorizations as are legally required) to carry on its business as now being conducted, to own, lease and operate its properties and assets as now owned, leased or operated and to enter into and to carry on the business and activities now conducted by it. True and complete copies of the articles of association and bylaws of the Bank, as amended to date, have been made available to FFIN. The Bank is an insured depository institution as defined in the FDIA and is not a member of the Federal Reserve System. Except as set forth inConfidential Schedule 3.01(b), the Bank does not own or control any Affiliate or Subsidiary. The nature of the business of the Bank does not require it to be qualified to do business in any jurisdiction other than the State of Texas. Except as set forth inConfidential Schedule 3.01(b), the Bank has no equity interest, direct or indirect, in any other bank or corporation or in any partnership, joint venture or other business enterprise or entity, except as acquired through settlement of indebtedness, foreclosure, the exercise of creditors’ remedies or in a fiduciary capacity, and the business carried on by the Bank has not been conducted through any other direct or indirect Subsidiary or Affiliate of the Bank.

Section 3.02    Authority; Execution and Delivery. TBT has the requisite corporate power and authority to execute and deliver this Agreement and to consummate the transactions contemplated herein. The execution and delivery of this Agreement and the consummation of the Merger have been duly and validly approved by the TBT Board. The TBT Board has determined that the Merger, on the terms and conditions set forth in this Agreement, is in the best interests of TBT and its shareholders, has directed that this Agreement and the transactions contemplated hereby be submitted to TBT’s shareholders for adoption at a meeting of such shareholders with a recommendation from the TBT Board in favor of adoption and has adopted a resolution to the foregoing effect. TBT has taken all action necessary to authorize the execution, delivery and (provided the required regulatory and shareholder approvals are obtained) performance of this Agreement and the other agreements and documents contemplated hereby to which it is a party. This Agreement has been, and the other agreements and documents contemplated hereby to which TBT is a party, have been or at Closing will be, duly executed by TBT, and each constitutes the legal, valid and binding obligation of TBT, enforceable in accordance with its respective terms and conditions, except as enforceability may be limited by the Bankruptcy Exception.

Section 3.03    Capitalization.

(a)    The entire authorized capital stock of TBT consists solely of 10,000,000 shares of TBT Stock, of which 4,730,087 shares are issued and outstanding and no shares are held as treasury stock. Except as set forth onConfidential Schedule 3.03(a), there are no (i) outstanding equity securities of any kind or character or (ii) outstanding subscriptions, options, convertible securities, rights, warrants, calls or other agreements or commitments of any kind issued or granted by, or binding upon, TBT to purchase, repurchase or otherwise acquire any security of or equity interest in TBT or any predecessor or successor of TBT, obligating TBT to issue any shares of, restricting the transfer of or otherwise relating to shares of its capital stock of any class. All of the issued and outstanding shares of TBT Stock have been duly authorized, validly issued and are fully paid and nonassessable, and have not been issued in violation of the preemptive rights of any Person. Such shares of TBT Stock have been issued in compliance with the securities Laws of the United States and the states in which such shares of TBT Stock were issued. There are no restrictions

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applicable to the payment of dividends on the shares of TBT Stock except pursuant to applicable Laws, and all dividends declared before the date of this Agreement have been paid.

(b)    The entire authorized capital stock of the Bank consists solely of 10,000,000 shares of common stock, par value $1.00 per share, of the Bank (“Bank Stock”) of which 4,672,637 shares are issued and outstanding and no shares are held as treasury stock. There are no (i) outstanding equity securities of any kind or character or (ii) outstanding subscriptions, options, convertible securities, rights, warrants, calls or other agreements or commitments of any kind issued or granted by, or binding upon, the Bank to purchase or otherwise acquire any security of or equity interest in the Bank, obligating the Bank to issue any shares of, restricting the transfer of or otherwise relating to shares of its capital stock of any class. All of the issued and outstanding shares of Bank Stock have been duly authorized, validly issued and are fully paid and nonassessable, and have not been issued in violation of the preemptive rights of any Person. Such shares of Bank Stock have been issued in compliance with the securities Laws of the United States and the State of Texas. There are no restrictions applicable to the payment of dividends on the shares of Bank Stock except pursuant to applicable Laws, and all dividends declared before the date of this Agreement have been paid.

(c)    Except as set forth onConfidential Schedule 3.03(c), TBT owns, directly or indirectly, all the issued and outstanding shares of capital stock or other equity ownership interests of each of its Subsidiaries, free and clear of any Liens whatsoever, and all such shares or equity ownership interests are duly authorized and validly issued and are fully paid, nonassessable (except, with respect to any Subsidiary of TBT that is an insured depository institution, as provided under 12 U.S.C. § 55 or any comparable provision of applicable state Law) and free of preemptive rights, with no personal liability attaching to the ownership thereof. No Subsidiary of TBT has or is bound by any outstanding subscriptions, options, warrants, calls, rights, commitments or agreements of any character calling for the purchase or issuance of any shares of capital stock or any other equity security of such Subsidiary or any securities representing the right to purchase or otherwise receive any shares of capital stock or any other equity security of such Subsidiary.

Section 3.04    Compliance with Laws, Permits and Instruments.

(a)    Except as set forth onConfidential Schedule 3.04(a), TBT and each of its Subsidiaries have in all material respects performed and abided by all obligations required to be performed by it as of the date hereof, and have complied in all material respects with, and is in compliance in all material respects with, and is not in default (and with the giving of notice or the passage of time will not be in default) under, or in violation of, (i) any provision of the certificate of formation of TBT or any of its Subsidiaries, the bylaws or other governing documents of TBT or any of its Subsidiaries, as applicable (collectively, the “TBT Constituent Documents”), (ii) any material provision of any mortgage, indenture, lease, contract, agreement or other instrument applicable to TBT, the Bank or their respective assets, operations, properties or businesses, or (iii) any Law or Order of any Governmental Entity applicable to TBT or any of its Subsidiaries or their respective assets, operations, properties or businesses.

(b)    Except as set forth onConfidential Schedule 3.04(b), the execution, delivery and performance (provided the required regulatory and shareholder approvals are obtained) of this Agreement and the other agreements contemplated hereby, and the completion of the transactions contemplated hereby and thereby will not conflict with, or result, by itself or with the giving of notice or the passage of time, in any violation of or default or loss of a benefit under, (i) the TBT Constituent Documents, (ii) any material mortgage, indenture, lease, contract, agreement or other instrument applicable to TBT or any of its Subsidiaries or their respective assets, operations, properties or businesses or (iii) any Law or Order of any Governmental Entity applicable to TBT or any of its Subsidiaries or their respective assets, operations, properties or businesses.

Section 3.05    Financial Statements.

(a)    TBT has made available to FFIN true and complete copies of (i) the audited consolidated balance sheets of TBT as of December 31, 2016, 2017 and 2018, the audited consolidated statements of income, comprehensive income, changes in shareholders’ equity and cash flows of TBT for the years ended

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December 31, 2016, 2017 and 2018, and the unaudited consolidated balance sheet of TBT as of June 30, 2019, the unaudited consolidated statements of income and changes in shareholders’ equity of TBT for thesix-month period ended June 30, 2019, and (ii) the unaudited balance sheet of the Bank as of June 30, 2019, and the unaudited statements of income and changes in shareholders’ equity of the Bank for thesix-month period ended June 30, 2019 (collectively, such financial statements listed in clause (i) and (ii) the “TBT Financial Statements”). The TBT Financial Statements (including the related notes) complied as to form, as of their respective dates, in all material respects with applicable accounting requirements, have been prepared according to generally accepted accounting principles of the United States (“GAAP”) applied on a consistent basis during the periods and at the dates involved (except as may be indicated in the notes thereto), fairly present, in all material respects, the consolidated financial condition of TBT and the Bank at the dates thereof and the consolidated results of operations and cash flows for the periods then ended (subject, in the case of unaudited statements, to notes and normalyear-end adjustments that were not material in amount or effect), and the accounting records underlying the TBT Financial Statements accurately and fairly reflect in all material respects the transactions of TBT. Except as set forth onConfidential Schedule 3.05(a), the TBT Financial Statements do not contain any items of extraordinary or nonrecurring income or any other income not earned in the ordinary course of business except as expressly specified therein.

(b)    TBT has made available to FFIN true and complete copies of Call Report of the Bank as of December 31, 2016, 2017 and 2018 and June 30, 2019 (the “Bank Call Reports”), for the Bank. The Bank Call Reports fairly present, in all material respects, the financial position of the Bank and the results of its operations at the date and for the period indicated in that Bank Call Report in conformity with the instructions to the Bank Call Report. The Bank Call Reports do not contain any items of special or nonrecurring income or any other income not earned in the ordinary course of business except as expressly specified therein. The Bank has calculated its allowance for loan losses in accordance with GAAP and regulatory accounting principles (“RAP”) as applied to banking institutions and in accordance with all applicable rules and regulations. The allowance for loan losses account for the Bank is, and as of the Closing Date will be, adequate in all material respects to provide for all losses, net of recoveries relating to loans previously charged off, on all outstanding loans of the Bank.

Section 3.06    Undisclosed Liabilities. Except as set forth onConfidential Schedule 3.06, neither TBT nor any of its Subsidiaries have liability or obligation, accrued, absolute, contingent or otherwise and whether due or to become due (including, without limitation, unfunded obligations under any employee benefit plan maintained by TBT or any of its Subsidiaries or liabilities for federal, state or local taxes or assessments), that are not reflected in or disclosed in the appropriate TBT Financial Statements or Bank Call Reports, except those liabilities and expenses incurred in the ordinary course of business and consistent with prudent business practices since the date of the latest balance sheets included in the TBT Financial Statements or the Bank Call Reports, respectively, and that are not, individually or in the aggregate, material to TBT and its Subsidiaries.

Section 3.07    Litigation.

(a)    Except as set forth onConfidential Schedule 3.07, neither TBT nor any of its Subsidiaries is a party to any, and there are no pending or, to the Knowledge of TBT, threatened, legal, administrative, arbitral or other proceedings, claims, actions or governmental or regulatory investigations of any nature against TBT or any of its Subsidiaries, nor to the Knowledge of TBT, is there any basis for any proceeding, claim or any action against TBT or any of its Subsidiaries. Except as set forth inConfidential Schedule 3.07, the amounts in controversy in each matter described onConfidential Schedule 3.07, and the costs and expenses of defense thereof (including attorneys’ fees) are fully covered by insurance, subject to the deductible set forth onConfidential Schedule 3.07 with respect to each matter and subject to the policy limits set forth onConfidential Schedule 3.07. There is no Order imposed upon TBT or any of its Subsidiaries or the assets or Property of TBT or any of its Subsidiaries that has resulted in, or is reasonably likely to result in, a Material Adverse Change as to TBT or any of its Subsidiaries.

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(b)    No legal action, suit or proceeding or judicial, administrative or governmental investigation is pending or, to the Knowledge of TBT, threatened against TBT or any of its Subsidiaries that questions or might question the validity of this Agreement or the agreements contemplated hereby or any actions taken or to be taken by TBT or any of its Subsidiaries pursuant hereto or thereto or seeks to enjoin or otherwise restrain the transactions contemplated hereby or thereby.

Section 3.08    Consents and Approvals. Except for (a) the filing of applications, filings and notices, as applicable, with the Board of Governors of the Federal Reserve System (the “Federal Reserve”) under the BHCA and approval of such applications, filings and notices, (b) the filing of applications, filings and notices, as applicable, with the TDB and OCC in connection with the Bank Merger, and approval of such applications, filings and notices, (c) the filing with the Securities and Exchange Commission (“SEC”) of (i) any filings under applicable requirements of the Exchange Act, including the filing of the Proxy Statement/Prospectus, and (ii) the Registration Statement and declaration of effectiveness of the Registration Statement, (d) the filing of the certificates of merger with the Texas Secretary of State pursuant to the requirements of the TBOC, and (e) such filings and approvals as are required to be made or obtained under the securities or “Blue Sky” Laws of various states in connection with the issuance of shares of FFIN Stock pursuant to this Agreement and the approval of the listing of such FFIN Stock on the NASDAQ, no consents, Orders or approvals of or filings or registrations with any Governmental Entity are necessary in connection with (A) the execution and delivery by TBT of this Agreement or (B) the consummation by TBT of the transactions contemplated by this Agreement. As of the date of this Agreement, TBT knows of no reason why all regulatory approvals from any Governmental Entity or Regulatory Agency required for the consummation of the transactions contemplated hereby should not be obtained on a timely basis and TBT has no Knowledge of any fact or circumstance that would materially delay receipt of any such required regulatory approval.

Section 3.09    Title to Assets.Confidential Schedule 3.09 sets forth a list of all existing deeds, leases and title insurance policies for all real property owned or leased by TBT or the Bank, including all other real estate, and all mortgages, deeds of trust, security agreements and other documents describing encumbrances to which such real property is subject, true and complete copies of which have been made available to FFIN. Each of TBT and the Bank has good and marketable title to all of its assets and Properties, including all personal and intangible properties as reflected in the TBT Financial Statements or the Bank Call Reports or acquired subsequent thereto, subject to no liens, mortgages, security interests, encumbrances or charges of any kind except (a) as described inConfidential Schedule 3.09, (b) as noted in the TBT Financial Statements or the Bank Call Reports, (c) statutory liens not yet delinquent, (d) consensual landlord liens, (e) encumbrances that do not materially impair the use thereof for the purpose for which they are held, (f) pledges of assets in the ordinary course of business to secure public funds deposits or Federal Home Loan Bank advances, and (g) those assets and properties disposed of for fair value in the ordinary course of business since the applicable dates of the TBT Financial Statements or the Bank Call Reports. At the time of Closing, each Property shall have full, free and uninterrupted access to and from all streets and rights of way adjacent to any Property, and TBT has no Knowledge of any fact or condition which would result in the termination or impairment of such access.

Section 3.10    Absence of Certain Changes or Events. Except as set forth onConfidential Schedule 3.10, since December 31, 2018, each of TBT and each of its Subsidiaries has conducted its business only in the ordinary course and has not:

(a)    incurred any obligation or liability, absolute, accrued, contingent or otherwise, whether due or to become due, except deposits taken and federal funds purchased and current liabilities for trade or business obligations, other than in the ordinary course of business and consistent with past practices and safe and sound banking practices;

(b)    discharged or satisfied any Lien or paid any obligation or liability, whether absolute or contingent, due or to become due, other than in the ordinary course of business and consistent with past practices and safe and sound banking practices;

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(c)    increased the shares of TBT Stock or Bank Stock outstanding (other than as the result of the exercise of any stock option award or warrant agreement that was outstanding prior to the date of this Agreement), or declared or made any payment of dividends or other distribution to its shareholders, or purchased, retired or redeemed, or obligated itself to purchase, retire or redeem, any of its shares of capital stock or other securities;

(d)    issued, reserved for issuance, granted, sold or authorized the issuance of any shares of its capital stock or other securities or subscriptions, options, warrants, calls, rights or commitments of any kind relating to the issuance thereto;

(e)    acquired any capital stock or other equity securities or acquired any ownership interest in any bank, corporation, partnership or other entity (except (i) through settlement of indebtedness, foreclosure, or the exercise of creditors’ remedies or (ii) in a fiduciary capacity, the ownership of which does not expose it to any liability from the business, operations or liabilities of such Person);

(f)    mortgaged, pledged or subjected to Lien any of its material property, business or assets, tangible or intangible, except (i) Permitted Encumbrances, (ii) pledges of assets to secure public fund deposits or Federal Home Loan Bank advances, and (iii) those assets and properties disposed of for fair value since the applicable dates of the TBT Financial Statements or the Bank Call Reports;

(g)    sold, transferred, leased to others or otherwise disposed of any of its assets (except for assets disposed of for fair value) or canceled or compromised any debt or claim, or waived or released any right or claim, other than in the ordinary course of business and consistent with past business practices and prudent banking practices;

(h)    terminated, canceled or surrendered, or received any notice of or threat of termination or cancellation of any contract, lease or other agreement or suffered any damage, destruction or loss which, individually or in the aggregate, may reasonably constitute a Material Adverse Change;

(i)    disposed of, permitted to lapse, transferred or granted any rights under, or entered into any settlement regarding the breach or infringement of, any license or Proprietary Right or modified any existing rights with respect thereto;

(j)    other than annual increases in compensation consistent with past practices, made any change in the rate of compensation, commission, bonus, vesting or other direct or indirect remuneration payable, or paid or agreed or orally promised to pay any bonus, extra compensation, pension or severance or vacation pay, to or for the benefit of any of its shareholders, directors, officers, employees or agents, or entered into any employment or consulting contract or other agreement with any director, officer or employee or adopted, amended or terminated any pension, employee welfare, retirement, stock purchase, stock option, stock appreciation rights, termination, severance, income protection, golden parachute, savings or profit-sharing plan (including trust agreements and insurance contracts embodying such plans), any deferred compensation, or collective bargaining agreement, any group insurance contract or any other incentive, welfare or employee benefit plan or agreement maintained by it for the benefit of its directors, employees or former employees, except to the extent required by applicable Law;

(k)    except for improvements or betterments relating to Properties, made any capital expenditures or capital additions or betterments in excess of an aggregate of $50,000;

(l)    instituted, had instituted against it, settled or agreed to settle any litigation, action or proceeding prior to any court or Governmental Entity relating to its property;

(m)    except for the transactions contemplated by this Agreement or as otherwise permitted hereunder, entered into any transaction, or entered into, modified or amended any contract or commitment, other than in the ordinary course of business and consistent with past business practices and prudent banking practices;

(n)    entered into or given any promise, assurance or guarantee of the payment, discharge or fulfillment of any undertaking or promise made by any Person, other than in the ordinary course of business and consistent with past business practices and prudent banking practices;

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(o)    sold, or disposed of, or otherwise divested itself of the ownership, possession, custody or control, of any corporate books or records of any nature that, in accordance with sound business practice, normally are retained for a period of time after their use, creation or receipt, except at the end of the normal retention period;

(p)    made any, or acquiesced with any, change in any accounting methods, principles or practices except as required by GAAP or RAP;

(q)    sold (provided, however, that payment at maturity is not deemed a sale) or purchased any investment securities in an aggregate amount of $100,000 or more;

(r)    made, renewed, extended the maturity of, or altered any of the material terms of any loan to any single borrower and his related interests in excess of the principal amount of $500,000;

(s)    renewed, extended the maturity of, or altered any of the terms of any loan classified by TBT as “special mention,” “substandard,” or “impaired” or other words of similar import; or

(t)    entered into any agreement or made any commitment whether in writing or otherwise to take any of the types of action described in subsections (a) through (t) above.

Section 3.11    Leases, Contracts and Agreements.

(a)    Confidential Schedule 3.11(a) sets forth a complete listing, as of August 31, 2019, of all contracts to which TBT or any of its Subsidiaries is a party (collectively, the “Listed Contracts”) that:

(i)    relate to real property used by TBT or any of its Subsidiaries in its operations (such contracts being referred to herein as the “Leases”);

(ii)    relate in any way to the assets or operations of TBT or any of its Subsidiaries and involves payments to or by TBT or any of its Subsidiaries of $50,000 or more during the term thereof;

(iii)    contain any right of first refusal or option to purchase in favor of a third party;

(iv)    limits the ability of TBT or any of its Subsidiaries to compete in any line of business or with any Person or in any geographic area or that upon consummation of the Merger will restrict the ability of FFIN or any of its Affiliates to engage in any line of business in which a bank holding company may lawfully engage;

(v)    obligates TBT or its Subsidiaries (or, following the consummation of the transactions contemplated hereby, FFIN and its Subsidiaries) to conduct business with any third party on an exclusive or preferential basis, or that grants any Person other than TBT or any of its Subsidiaries “most favored nation” status or similar rights;

(vi)    relates to the formation, creation or operation, management or control of any partnership, limited liability company, joint venture or other similar arrangement with any third parties;

(vii)    relates to indebtedness of TBT or any of its Subsidiaries;

(viii)    provides for potential indemnification payments by TBT or any of its Subsidiaries or the potential obligation of TBT or any of its Subsidiaries to repurchase loans;

(ix)    is material to TBT’s and its Subsidiaries’ balance sheets or their financial conditions or results of operations;

(x)    provides any rights to investors in TBT, including registration, preemptive or antidilution rights or rights to designate members of or observers to TBT’s or any of its Subsidiaries’ board of directors;

(xi)    is a data processing/technology contract, software programming or licensing contract;

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(xii)    requires a consent to, waiver of or otherwise contains a provision relating to a “change of control,” or that would or would reasonably be expected to prevent, delay or impair the consummation of the transactions contemplated by this Agreement;

(xiii)    limits the payment of dividends by the Bank or any other Subsidiary of TBT; or

(xiv)    was otherwise not entered into in the ordinary course of business or that is material to TBT or any of its Subsidiaries or its financial condition or results of operations.

(b)    For the purposes of this Agreement, the term “Listed Contracts” does not include (i) loans made by, (ii) unfunded loan commitments made by, (iii) letters of credit issued by, (iv) loan participations of, (v) Federal funds sold or purchased by, (vi) repurchase agreements made by, (vii) bankers acceptances of, or (viii) deposit liabilities of, TBT or the Bank.

(c)    Except as set forth onConfidential Schedule 3.11(c), no participations or loans have been sold that have buy back, recourse or guaranty provisions that create contingent or direct liability to TBT or any of its Subsidiaries.

(d)    True and correct copies of all such Listed Contracts, and all amendments thereto, have been made available to FFIN.

(e)    Except as set forth onConfidential Schedule 3.11(e), all rent and other payments by TBT and each of its Subsidiaries under the Listed Contracts are current, there are no existing defaults by TBT or any of its Subsidiaries under the Listed Contracts and no termination, condition or other event has occurred that (whether with or without notice, lapse of time or the happening or occurrence of any other event) would constitute a default by TBT or any of its Subsidiaries thereunder.

(f)    Except as set forth onConfidential Schedule 3.11(f), since December 31, 2018, neither TBT nor any of its Subsidiaries has entered into any contracts of the type described underSections 3.11(a)(i) – (xiv).

(g)    (i) Each Listed Contract is valid and binding on TBT or one of its Subsidiaries, as applicable, and enforceable in accordance with its respective terms and conditions (subject to the Bankruptcy Exception), except as, either individually or in the aggregate, would not reasonably be expected to have a Material Adverse Change on TBT, (ii) TBT and each of its Subsidiaries have in all material respects complied with and performed all obligations required to be complied with or performed by any of them to date under each Listed Contract, (iii) to the Knowledge of TBT, each third-party counterparty to each Listed Contract has in all material respects complied with and performed all obligations required to be complied with and performed by it to date under such Listed Contract, except where such noncompliance or nonperformance, either individually or in the aggregate, would not reasonably be expected to have a Material Adverse Change on TBT, (iv) neither TBT nor any of its Subsidiaries has Knowledge of, or has received notice of, any violation of any Listed Contract by any of the other parties thereto, and (v) no event or condition exists which constitutes or, after notice or lapse of time or both, will constitute, a material breach or default on the part of TBT or any of its Subsidiaries, or to the Knowledge of TBT, any other party thereto, of or under any such Listed Contract.

Section 3.12    Taxes.

(a)    TBT and each of its Subsidiaries have duly and timely filed all federal, state and other material Tax Returns that they were required to file under applicable Laws with the appropriate Governmental Entity. All such Tax Returns were correct and complete in all material respects and have been prepared in compliance with all applicable Laws and all Taxes due and owing by TBT and each of its Subsidiaries (whether or not shown on any Tax Return) have been timely and properly paid. Neither TBT nor any of its Subsidiaries is currently the beneficiary of any extension of time within which to file any Tax Return. No claim has been made in writing and to the Knowledge of TBT, no claim has been assessed by an authority in a jurisdiction where TBT or any of its Subsidiaries does not file Tax Returns that it is or may be subject to taxation by that jurisdiction. Other than Permitted Encumbrances, there are no Liens for Taxes upon any of the assets of TBT or any of its Subsidiaries.

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(b)    TBT and each of its Subsidiaries have collected or withheld and duly paid to the appropriate Governmental Entity all Taxes required to have been collected or withheld and so paid in connection with amounts paid or owing to any employee, independent contractor, creditor, shareholder or other third party.

(c)    There is no action, suit, proceeding, audit, assessment, dispute or claim concerning any Tax liability of TBT or any of its Subsidiaries either (i) claimed or raised by any Governmental Entity in writing, or (ii) as to which TBT or any of its Subsidiaries has Knowledge based upon personal contact with any agent of such authority. No taxing authority has threatened in writing or, the Knowledge of TBT, otherwise to assess additional Taxes for any period for which Tax Returns have been filed.

(d)    True and complete copies of the federal, state and local income Tax Returns of TBT and each of its Subsidiaries, as filed with the taxing authority for the years ended December 31, 2016, 2017, and 2018 have been made available to FFIN. Neither TBT nor any of its Subsidiaries have waived any statute of limitations in respect of Taxes or agreed to any extension of time with respect to a Tax assessment or deficiency, which waiver or extension remains in effect.

(e)    Neither TBT nor any of its Subsidiaries have been a United States real property holding corporation within the meaning of Section 897(c)(2) of the Code during the applicable period specified in Section 897(c)(l)(A)(ii) of the Code.

(f)    Neither TBT nor any of its Subsidiaries is a party to or bound by any tax allocation or sharing agreement, other than (i) those to which only TBT and its Subsidiaries are parties, or (ii) commercial business agreements, the principal purpose of which is not the allocation of Taxes.

(g)    Neither TBT nor any of its Subsidiaries have (i) been a member of any group filing a consolidated federal income tax return (other than a group the common parent of which was TBT), nor (ii) any liability for the Taxes of any Person other than TBT and its Subsidiaries under Treasury RegulationSection 1.1502-6 (or any similar provision of state, local, or foreign Law), or as a transferee or successor, by contract or under Law.

(h)    Neither TBT nor any of its Subsidiaries has participated in any reportable transaction or a transaction that is substantially similar to a listed transaction as defined under Sections 6707A, 6011, 6111 and 6112 of the Code and the Treasury Regulations promulgated thereunder.

(i)    Neither TBT nor any of its Subsidiaries has been required to disclose on its federal income Tax Returns any position that could give rise to a substantial understatement of federal income tax within the meaning of Section 6662 of the Code.

(j)    Neither TBT nor any of its Subsidiaries received or sought a private letter ruling or gain recognition agreement with respect to Taxes.

(k)    Except as set forth onConfidential Schedule 3.12(k), neither TBT nor any of its Subsidiaries will be required to include any item of income in, nor will TBT or any of its Subsidiaries be required to exclude any item of deduction from, taxable income for any taxable period (or portion thereof) ending on or after the Closing Date as a result of any: (i) change in TBT’s or any of its Subsidiaries’ method of accounting for a taxable period ending on or prior to the Closing Date under Section 481 of the Code (or any corresponding or similar provision of state, local or foreign income Tax law); (ii) “closing agreement” as described in Section 7121 of the Code (or any corresponding or similar provision of state, local or foreign income Tax law) executed on or prior to the Closing Date by TBT or any of its Subsidiaries; (iii) intercompany transaction or excess loss account of TBT or any of its Subsidiaries described in the Treasury Regulations under Section 1502 of the Code (or any corresponding or similar provision of state, local or foreign Tax law); (iv) installment sale or open transaction disposition made on or prior to the Closing Date by TBT or any of its Subsidiaries; (v) prepaid amount received on or prior to the Closing Date by TBT or any of its Subsidiaries; (vi) election under Section 108(i) of the Code; or (vii) use of an improper method of accounting for a taxable period ending on or prior to the Closing Date.

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(l)    Neither TBT nor any of its Subsidiaries have distributed stock of another Person or had its stock distributed by another Person, in a transaction that was purported or intended to be governed in whole or in part by Sections 355 or 361 of the Code.

(m)    Confidential Schedule 3.12(m) lists and contains an accurate and complete description as to the United States federal and each state net operating and capital loss carryforwards for TBT and each of its Subsidiaries, that exist as of June 30, 2019, and no such net operating or capital loss carryforwards are subject to limitation under Sections 382, 383 or 384 of the Code or the Treasury Regulations, as of the Closing Date.

(n)    Within the past three (3) years, the Internal Revenue Service (the “IRS”) has not challenged the interest deduction on any of TBT’s or any of its Subsidiaries’ debt on the basis that such debt constitutes equity for federal income tax purposes.

(o)    The unpaid Taxes of TBT and each of its Subsidiaries (i) did not, as of June 30, 2019, exceed the current liability accruals for Taxes (excluding any reserves for deferred Taxes established to reflect timing differences between GAAP and Tax income) set forth in the TBT Financial Statements, and (ii) do not exceed such current liability accruals for Taxes (excluding reserves for deferred Taxes established to reflect timing differences between GAAP and Tax income) as adjusted for the passage of time through the Closing Date in accordance with the past custom and practice of TBT and its Subsidiaries in filing their respective Tax Returns.

(p)    Neither TBT nor any of its Subsidiaries has taken any action or has Knowledge of any facts or circumstances that could reasonably be expected to prevent or impede the Integrated Mergers, taken together, from being treated as an integrated transaction that qualifies as a “reorganization” within the meaning of Section 368(a) of the Code.

Section 3.13    Insurance.Confidential Schedule 3.13 sets forth an accurate and complete list of all policies of insurance, including fidelity and bond insurance, relating to TBT and each of its Subsidiaries. All such policies (a) are valid, outstanding and enforceable according to their terms, subject to the Bankruptcy Exception, and (b) are presently in full force and effect, no notice has been received of the cancellation, or threatened or proposed cancellation, of any such policy and there are no unpaid premiums due thereon. Neither TBT nor any of its Subsidiaries is in default with respect to any such policy nor has TBT or any of its Subsidiaries failed to give any notice or present any claim thereunder in a due and timely fashion. Except as set forth onConfidential Schedule 3.13, neither TBT nor any of its Subsidiaries have been refused any insurance with respect to its assets or operations, nor has its insurance been limited by any insurance carrier to which TBT or any of its Subsidiaries have applied for any such insurance within the last two (2) years. Each property of TBT and each of its Subsidiaries is insured for an amount deemed adequate by TBT’s management, as applicable, against risks customarily insured against. There have been no claims under any fidelity bonds of TBT or any of its Subsidiaries within the last three (3) years, and TBT has no Knowledge of any facts that would form the basis of a claim under such bonds.

Section 3.14    No Material Adverse Change. There has not been any Material Adverse Change with regard to or affecting TBT or any of its Subsidiaries since December 31, 2018, nor has any event or condition occurred that has resulted, or is reasonably likely to result, in a Material Adverse Change on TBT or any of its Subsidiaries or that could materially affect TBT’s or any of its Subsidiaries’ ability to perform the transactions contemplated by this Agreement or the other agreements contemplated hereby.

Section 3.15    Proprietary Rights. Except as set forth onConfidential Schedule 3.15, neither TBT nor any of its Subsidiaries owns or requires the use of any patent, patent application, patent right, invention, process, trademark (whether registered or unregistered), trademark application, trademark right, trade name, service name, service mark, copyright or any trade secret (“Proprietary Rights”) for its business or operations. Neither TBT nor any of its Subsidiaries is infringing upon or otherwise acting adversely to, and have not infringed upon or otherwise acted adversely to, any Proprietary Right owned by any other Person or Persons. There is no claim

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or action by any such Person pending, or to TBT’s Knowledge, threatened, with respect thereto. To the Knowledge of TBT, since January 1, 2016, no third party has gained unauthorized access to any information technology networks controlled by and material to the operation of the business of TBT and its Subsidiaries.

Section 3.16    Transactions with Certain Persons and Entities. Except as set forth onConfidential Schedule 3.16 and excluding deposit liabilities, there are no outstanding amounts payable to or receivable from, or advances by TBT or any of its Subsidiaries to, and neither TBT nor any of its Subsidiaries is otherwise a creditor to, any director or executive officer of TBT or any of its Subsidiaries nor is TBT or any of its Subsidiaries a debtor to any such Person other than as part of the normal and customary terms of such person’s employment or service as a director of TBT or any of its Subsidiaries. Except as set forth onConfidential Schedule 3.16, neither TBT nor any of its Subsidiaries uses any asset owned by any shareholder or any present or former director or officer of TBT or any of its Subsidiaries, or any Affiliate thereof, in its operations (other than personal belongings of such officers and directors located in TBT’s or any of its Subsidiaries’ premises and not used in the operations of TBT or any of its Subsidiaries), nor to the Knowledge of TBT do any of such Persons own or have the right to use real property that is adjacent to property on which TBT’s or any of its Subsidiaries’ facilities are located. Except as set forth onConfidential Schedule 3.16 orConfidential Schedule 3.28(a), and excluding deposit liabilities, neither TBT nor any of its Subsidiaries is a party to any transaction or contract with any director or executive officer of TBT or any of its Subsidiaries.

Section 3.17    Evidences of Indebtedness. All evidences of indebtedness and Leases included in the TBT Financial Statements are the legal, valid and binding obligations of the respective obligors thereof, enforceable in accordance with their respective terms, subject to the Bankruptcy Exception, and to the Knowledge of TBT, are not subject to any defenses, offsets or counterclaims that may be asserted against TBT or any of its Subsidiaries or the present holder thereof. The credit files of TBT and the Bank contain all material information (excluding general, local or national industry, economic or similar conditions) known to TBT that is reasonably required to evaluate in accordance with generally prevailing practices in the banking industry the collectability of the loan portfolio of TBT or the Bank (including loans that will be outstanding if any of them advances funds they are obligated to advance). TBT and the Bank have disclosed all of the special mention, substandard, impaired, doubtful, loss, nonperforming or problem loans of TBT and the Bank on the internal watch list of TBT or the Bank, a copy of which as of June 30, 2019, has been made available to FFIN. Neither TBT nor the Bank is aware of, nor has TBT or the Bank received notice of, any past or present conditions, events, activities, practices or incidents that may result in a violation of any Environmental Law with respect to any real property securing any indebtedness reflected as an asset of TBT. With respect to any loan or other evidence of indebtedness all or a portion of which has been sold to or guaranteed by any Governmental Entity, including the Small Business Administration, each of such loans was made in compliance and conformity with all relevant Laws such that such Governmental Entity’s guaranty of such loan is effective during the term of such loan in all material respects. Notwithstanding anything to the contrary contained in thisSection 3.17, no representation or warranty is being made as to the sufficiency of collateral securing, or the collectability of, the loans of the Bank;provided,however, that to the Knowledge of TBT, except as disclosed in the TBT Financial Statements or except as set forth onConfidential Schedule 3.17, no loan of the Bank is impaired and there is no impairment of the fair value of any collateral securing any loan of the Bank.

Section 3.18    Condition of Assets. All tangible assets used by TBT and each of its Subsidiaries are in good operating condition, ordinary wear and tear excepted, and conform in all material respects with all applicable ordinances, regulations, zoning and other Laws, whether federal, state or local. None of TBT’s or any of its Subsidiaries’ premises or equipment is in need of maintenance or repairs other than ordinary routine maintenance and repairs that are not material in nature or cost.

Section 3.19    Environmental Compliance.

(a)    To the Knowledge of TBT, TBT and each of its Subsidiaries, operations and Properties are in material compliance with all Environmental Laws. TBT does not have Knowledge of, nor has TBT or any of its

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Subsidiaries received notice of, any past, present, or future conditions, events, activities, practices or incidents that may interfere with or prevent the material compliance of TBT or any of its Subsidiaries with all Environmental Laws.

(b)    TBT and each of its Subsidiaries have obtained all permits, licenses and authorizations that are required by it under all Environmental Laws, all such permits are in full force and effect, there exists no basis for revocation or suspension of the permits, and the permits will not be affected by the transactions contemplated herein.

(c)    To the Knowledge of TBT, no Hazardous Materials exist on, about or within any of the Properties, nor to the Knowledge of TBT has any Hazardous Materials previously existed on, under, about or within or have been used, generated, stored, transported, disposed of, on or released from any of the Properties, except in normal quantities used in the normal course of business as office or cleaning supplies without release to the environment. The use that TBT and each of its Subsidiaries makes and intends to make of the Properties will not result in the use, generation, storage, transportation, accumulation, disposal or release of any Hazardous Material on, in or from any of the Properties, except in normal quantities used in the normal course of business as office or cleaning supplies without release to the environment.

(d)    There is no action, suit, proceeding, investigation, or inquiry by any Governmental Entity pending, or to the Knowledge of TBT, threatened against TBT, any of its Subsidiaries or, to TBT’s Knowledge, pending or threatened against any other Person in connection with any Property, arising in any way under any Environmental Law. Neither TBT nor any of its Subsidiaries have any liability for remedial action under any Environmental Law. Neither TBT nor any of its Subsidiaries received any request for information by any Governmental Entity with respect to the condition, use or operation of any of the Properties nor has TBT or any of its Subsidiaries received any notice of any kind from any Governmental Entity or other Person with respect to any violation of or claimed or potential liability of any kind under any Environmental Law.

(e)    Except as listed onConfidential Schedule 3.19, to the Knowledge of TBT, none of the following exists at any property or facility owned or operated by TBT or any of its Subsidiaries: (i) under orabove-ground storage tanks, (ii) asbestos containing material in any form or condition, (iii) materials or equipment containing polychlorinated biphenyls or urea formaldehyde, or (iv) landfills, surface impoundments, or disposal areas.

(f)    None of the properties currently owned or operated by TBT or any of its Subsidiaries is encumbered by a Lien arising or imposed under any Environmental Law.

(g)    The transactions contemplated by this Agreement will not result in any liabilities for site investigation or cleanup, or require the consent of any Person, pursuant to any of theso-called“transaction-triggered” or “responsible property transfer” Environmental Laws.

(h)    Neither TBT nor any of its Subsidiaries, either expressly or by operation of law, has assumed or undertaken any obligation, including any obligation for remedial action, of any other Person under any Environmental Law.

(i)    TBT has provided FFIN with copies of reports in its possession discussing the environmental condition of any Property and any violations of Environmental Law relating to any Property.

Section 3.20    Regulatory Compliance. All reports, records, registrations, statements, notices and other documents or information required to be filed by TBT and any of its Subsidiaries with any Regulatory Agency, including, but not limited to, the Federal Reserve, FDIC and the TDB, have been duly and timely filed and all information and data contained in such reports, records or other documents are true, accurate, correct and complete in all material respects. None of TBT or any of its Subsidiaries is or has been within the last five (5) years subject to any commitment letter, memorandum of understanding, cease and desist Order, has been ordered to pay any civil money penalty, written agreement or other formal or informal administrative action with any such regulatory bodies, and TBT and each of its Subsidiaries are in full compliance with the requirements of

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any such commitment letter, memorandum of understanding, cease and desist Order, civil money penalty, written agreement or other formal or informal administrative action, and there are no actions or proceedings pending, or to TBT’s Knowledge, threatened against TBT or any of its Subsidiaries by or before any such regulatory bodies or any other nation, state or subdivision thereof, or any other entity exercising executive, legislative, judicial, regulatory or administrative functions of or pertaining to government. Except for examinations conducted by bank regulatory agencies in the ordinary course of business, no Regulatory Agency has initiated any proceeding or, to TBT’s Knowledge, investigation into the business or operations of TBT or any of its Subsidiaries. There is no unresolved violation, criticism or exception by any Regulatory Agency with respect to any report or statement relating to any examinations of TBT or the Bank. TBT is “well-capitalized” (as that term is defined in 12 C.F.R. § 225.2(r)) and “well managed” (as that term is defined is 12 C.F.R. § 225.2(s)). The Bank is an “eligible depository institution” (as that term is defined in 12 C.F.R. § 303.2(r)).

Section 3.21    Absence of Certain Business Practices. Neither TBT nor any of its Subsidiaries or to the Knowledge of TBT, any officer, employee or agent of TBT or any of its Subsidiaries, or any other Person acting on their behalf, has, directly or indirectly, within the past five (5) years, given or agreed to give any gift or similar benefit to any customer, supplier, governmental employee or other Person who is or may be in a position to help or hinder the business of TBT or any of its Subsidiaries (or assist TBT or any of its Subsidiaries in connection with any actual or proposed transaction) that (a) could reasonably be expected to subject TBT or any of its Subsidiaries to any damage or penalty in any civil, criminal or governmental litigation or proceeding, (b) if not given in the past, could reasonably be expected to have resulted in a Material Adverse Change, or (c) if not continued in the future could reasonably be expected to result in a Material Adverse Change or subject TBT or any of its Subsidiaries to suit or penalty in any private or governmental litigation or proceeding.

Section 3.22    Books and Records. The minute books, stock certificate books and stock transfer ledgers of TBT and each of its Subsidiaries (a) have been kept accurately in the ordinary course of business, (b) are complete and correct in all material respects, (c) the transactions entered therein represent bona fide transactions, and (d) do not fail to reflect transactions involving the business of TBT or any of its Subsidiaries that properly should have been set forth therein and that have not been accurately so set forth.

Section 3.23    Forms of Instruments, Etc. TBT has made, and will make, available to FFIN copies of all standard forms of notes, mortgages, deeds of trust and other routine documents of a like nature used on a regular and recurring basis by TBT and its Subsidiaries in the ordinary course of its business.

Section 3.24    Fiduciary Responsibilities. TBT and each of its Subsidiaries have performed in all material respects all of its duties as a trustee, custodian, guardian or as an escrow agent in a manner that complies in all material respects with all applicable Laws, regulations, Orders, agreements, instruments and common law standards.

Section 3.25    Guaranties. Except as set forth onConfidential Schedule 3.25, according to prudent business practices and in compliance with applicable Law, neither TBT nor any of its Subsidiaries have guaranteed the obligations or liabilities of any other Person.

Section 3.26    Voting Trust, Voting Agreements or Shareholders’ Agreements. There is no existing voting trust, voting agreement, shareholders’ agreement or similar arrangement relating to a right of first refusal with respect to the purchase, sale or voting of any shares of TBT Stock or Bank Stock.

Section 3.27    Employee Relationships.

(a)    TBT and each of its Subsidiaries have complied in all material respects with all applicable Laws relating to its relationships with their employees, and TBT believes that the relationships between TBT’s and each of its Subsidiaries’ employees are good. To the Knowledge of TBT, no executive officer or manager of any of the operations of TBT or any of its Subsidiaries or of any group of employees of TBT or

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any of its Subsidiaries have any present plans to terminate their employment with TBT or any of its Subsidiaries. Except as set forth onConfidential Schedule 3.27(a), TBT is not a party to any oral or written contracts or agreements granting benefits or rights to employees or any collective bargaining agreement or to any conciliation agreement with the Department of Labor, the Equal Employment Opportunity Commission or any federal, state or local agency that requires equal employment opportunities or affirmative action in employment. There are no unfair labor practice complaints pending against TBT or any of its Subsidiaries before the National Labor Relations Board and no similar claims pending before any similar state or local or foreign agency. There is no activity or proceeding of any labor organization (or representative thereof) or employee group to organize any employees of TBT or any of its Subsidiaries, nor of any strikes, slowdowns, work stoppages, lockouts or threats thereof, by or with respect to any such employees. TBT and each of its Subsidiaries is in compliance in all material respects with all applicable Laws respecting employment and employment practices, terms and conditions of employment and wages and hours, and neither TBT nor any of its Subsidiaries is engaged in any unfair labor practice.

(b)    Set forth onConfidential Schedules 3.27(b) is a complete and correct list of all employment agreements between TBT or any of its Subsidiaries and any employee of TBT or any of its Subsidiaries. True and correct copies of all employment agreements and all amendments thereto, have been made available to FFIN.

(c)    Except for the Customer Service Agreement (the “PEO Agreement”) between the Bank and G&A Outsourcing, Inc. (together with its Affiliates, the “PEO”) dated January 4, 2010, neither TBT nor any of its Subsidiaries is a party to or bound by any agreement relating to the employment of any current employee with a professional employer or employee leasing organization. TBT and its Subsidiaries have complied in all material respects with their obligations and responsibilities under the PEO Agreement.

Section 3.28    Employee Benefit Plans.

(a)    Set forth collectively onConfidential Schedules 3.27(a) and3.28(a) is a complete and correct list of all “employee benefit plans” (as defined in the Employee Retirement Income Security Act of 1974, as amended (“ERISA”)), all multiple employer and “multiemployer plans” (as defined in the Code or ERISA), all specified fringe benefit plans as defined in Code § 6039D, and all other bonus, incentive, compensation, deferred compensation, profit sharing, stock option, phantom stock, stock appreciation right, stock bonus, stock purchase, employee stock ownership, savings, severance, supplemental unemployment, layoff, salary continuation, retirement, pension, health, life insurance, disability, group insurance, vacation, holiday, sick leave, fringe benefit or welfare plan or any other similar plan, agreement, policy or understanding (written or oral, qualified or nonqualified, currently effective or terminated), and any trust, escrow or other agreement related thereto (“Employee Plans”), which (i) are sponsored, maintained, or contributed to, by TBT, any of its Subsidiaries, or the PEO, or with respect to which TBT or any of its Subsidiaries has or could reasonably be expected to have any liability thereunder and (ii) provide benefits, or describe policies or procedures applicable to, or for the welfare of, any current of former officer, director, independent contractor, employee, or service provider of TBT or any of its Subsidiaries (including service providers who areco-employed by the PEO), or the dependents or spouses of any such Person, regardless of whether funded (the “TBT Employee Plans”).Confidential Schedules 3.27(a) and3.28(a) indicates each TBT Employee Plan that is sponsored or maintained by the PEO (each, a “PEO-Sponsored Plan”). Each TBT Employee Plan that is not aPEO-Sponsored Plan is herein referred to as a “TBT-Sponsored Plan”.

(b)    Except as set forth onConfidential Schedule 3.28(b), TBT has made available to FFIN true, accurate and complete copies of, as applicable and to the extent in the possession of or reasonably accessible by TBT, the documents comprising each TBT Employee Plan, or, in the case of each unwritten TBT Employee Plan, a written description thereof, including, to the extent applicable, each outstanding award agreement, trust agreement, and funding arrangement (including all annuity contracts, insurance contracts, and other funding instruments); the most current determination or opinion letter issued by the Internal Revenue Service; the three most recently filed Form 5500 Annual Reports (including all schedules and attachments);

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and documents, records, policies, procedures or other written materials related thereto. No unwritten amendment exists with respect to any written TBT Employee Plan.

(c)    Except as set forth onConfidential Schedule 3.28(c), no TBT Employee Plan is, and neither TBT nor any of its Subsidiaries has ever contributed to, sponsored, maintained, or had any liability with respect to, a “defined benefit plan” within the meaning of ERISA §3(35) or a plan subject to ERISA Title IV.

(d)    Except as set forth onConfidential Schedule 3.28(d), there have been no prohibited transactions (as defined in Code §4975(c)(1)), breaches of fiduciary duty or any other breaches or violations of any Law applicable to the TBT Employee Plans that would directly or indirectly subject TBT, any of its Subsidiaries, or any TBT Employee Plan to any taxes, penalties, or other liabilities (including any liability arising from any indemnification agreement or policy), except as would not reasonably be expected to result in a material liability. Each TBT Employee Plan that is intended to be qualified under Code §401(a) has a current favorable determination or opinion letter and eachTBT-Sponsored Plan and, to the Knowledge of TBT, eachPEO-Sponsored Plan, has been amended for all existing amendments up to and including all changes required by the most recent Required Amendments List applicable to the TBT Employee Plan and has no obligation to adopt any amendments for which the remedial amendment period under Code §401(b) has expired and TBT is not aware of any circumstances likely to result in revocation of any such favorable determination or opinion letter. EachTBT-Sponsored Plan and, to the Knowledge of TBT, eachPEO-Sponsored Plan, is so qualified and has been operated in material compliance with applicable Law and its terms, any related trust is exempt from federal income tax under Code §501(a) and no event has occurred that will or reasonably could result in the loss of such tax exemption or to liability for any tax under Code §511. There are no pending claims, lawsuits or actions relating to any TBT Employee Plan (other than ordinary course claims for benefits) and, to TBT’s Knowledge, none are threatened.

(e)    Except as set forth onConfidential Schedule 3.28(e), neither TBT nor any of its Subsidiaries provides post-termination benefits to any current or former employee or service provider of TBT or any of its Subsidiaries, or the dependent or spouse of any such current or former employee or service provider, other than as required by applicable Law. No written or oral representations have been made by or on behalf of TBT or any of its Subsidiaries to any employee or former employee of TBT or any of its Subsidiaries promising or guaranteeing any employer payment or funding for the continuation of medical, dental, life or disability coverage or any other welfare benefit (as defined in ERISA §3(1)) for any period of time beyond the end of the current plan year (except to the extent of coverage required under Code §4980B). The completion of the transactions contemplated by this Agreement will not cause a termination or partial termination, or otherwise accelerate the time of payment, exercise, or vesting, or increase the amount of compensation due to any current or former employee, officer or director of TBT or any of its Subsidiaries except (i) as required by the terms of any TBT Employee Plan or by applicable Law in connection with a qualified plan, (ii) as contemplated by this Agreement, or (iii) except as identified onConfidential Schedule 3.28(e). To the Knowledge of TBT, there are no surrender charges, penalties, or other costs or fees that would be imposed by any Person against TBT or any of its Subsidiaries, a TBT Employee Plan, or any other Person, including a TBT Employee Plan participant or beneficiary, with respect to any insurance, annuity, or investment contracts or any other similar investment held by any TBT Employee Plan as a result of the hypothetical liquidation as of the Closing Date.

(f)    The execution, delivery and performance by TBT of its obligations under the transactions contemplated by this Agreement and/or the approval of TBT’s shareholders of the Merger (whether alone or in connection with any subsequent event(s)), will not result in any payments or benefits which would not be deductible pursuant to Code §280G.

(g)    All contributions to any TBT Employee Plan (including, without limitation, all employer contributions, employee salary reduction contributions and all premiums or other payments (other than claims)) that are due and payable by TBT or any of its Subsidiaries on or before the Closing Date have been made with respect to each TBT Employee Plan and, to the extent not presently payable, appropriate reserves have been established for the payment and properly accrued in accordance with GAAP.

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(h)    Neither TBT nor any of its Subsidiaries has knowingly misled any person as to his or her rights under any TBT Employee Plan. All obligations required to be performed by TBT or any of its Subsidiaries under any TBT Employee Plan have been performed in all material respects and neither TBT nor any of its Subsidiaries is in default under or in violation of any material provision of any TBT Employee Plan. No event has occurred with respect to anyTBT-Sponsored Plan or, to the Knowledge of TBT, anyPEO-Sponsored Plan, that would constitute grounds for an enforcement action by any party against TBT, any of its Subsidiaries or any fiduciary of any TBT Employee Plan that could result in a material liability under part 5 of Title I of ERISA under any TBT Employee Plan.

(i)    With respect to each “employee benefit plan” (as defined in ERISA) maintained or contributed to or required to be contributed to, currently or within the last six years, by TBT or any corporation or trade or business, the employees of which, together with the employees of TBT and each of its Subsidiaries, are required to be treated as employed by a single employer under any of the rules contained in ERISA or Code §414 (the “Controlled Group Plans”):

(i)    All Controlled Group Plans that are “group health plans” (as defined in Code §5000(b)(1) and ERISA §733(a)) have been operated up to the Closing in a manner so as to not subject TBT or any of its Subsidiaries to any material liability under Code §4980B or §4980D;

(ii)    Except as set forth onConfidential Schedule 3.28(i), there is no Controlled Group Plan that is a “multiple employer plan” (as described in Code §413(c)) or “multiemployer plan” (as defined in ERISA §3(37)) or a “multiple employer welfare arrangement” (as defined in ERISA §3(40)), nor has there been any such plan under which TBT or any of its Subsidiaries had any liability in the last 6 years (or would have had liability if notice had been given); and

(iii)    Except as set forth onConfidential Schedule 3.28(i), each Controlled Group Plan that provides (or has provided within the past 6 years) for major medical, dental, vision, life, disability or similar coverage is covered by one or more third-party insurance policies and neither TBT nor any of its Subsidiaries is liable for self-insuring any such claims.

Each such Controlled Group Plan is included in the listing of Employee Plans onConfidential Schedule 3.28(a).

(j)    Except as set forth onConfidential Schedule 3.28(j), all TBT Employee Plan documents, annual reports or returns, audited, compiled or unaudited financial statements, actuarial valuations, summary annual reports, and summary plan descriptions issued with respect to the TBT Employee Plans are correct, complete, and current in all material respects, have been timely filed or distributed to the extent required by Law.

(k)    Except as set forth onConfidential Schedule 3.28(k), no TBT Employee Plan holds any stock or other securities of TBT or any of its Subsidiaries or provides the opportunity for the grant, purchase or contribution of any such security.

(l)    Except as provided inConfidential Schedule 3.28(l), TBT or any of its Subsidiaries may, at any time amend or terminate any TBT Employee Plan that it sponsors or maintains and may withdraw from and terminate its participation in any TBT Employee Plan to which it contributes (but does not sponsor or maintain), without obtaining the consent of any third party, other than an insurance company in the case of any benefit underwritten by an insurance company, and without incurring liability except for unpaid premiums or contributions due for the pay period that includes the effective date of such amendment, withdrawal or termination.

(m)    Each TBT Employee Plan that is a “nonqualified deferred compensation plan” within the meaning of Code §409A(d)(1) (a “Nonqualified Deferred Compensation Plan”) subject to Code §409A has (i) been maintained and operated since January 1, 2005 (or, if later, from its inception) in good faith compliance with Code §409A of the Code and all applicable IRS regulations promulgated thereunder and, as to any such plan in existence prior to January 1, 2005, has not been “materially modified” (within the meaning of IRS Notice

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2005-1) at any time after October 3, 2004, or has been amended in a manner that conforms with the requirements of Code §409A, and (ii) since January 1, 2011, been materially in documentary and operational compliance with Code §409A and all applicable IRS guidance promulgated thereunder. No additional tax under Code §409A(a)(1)(B) has been or is reasonably expected to be incurred by a participant in any such TBT Employee Plan or other contract, plan, program, agreement, or arrangement. Neither TBT nor any of its Subsidiaries is a party to, or otherwise obligated under, any contract, agreement, plan or arrangement that provides for thegross-up of taxes imposed by Code §409A(a)(1)(B). No currently outstanding stock option or other right to acquire TBT Stock or other equity security of TBT or any of its any of its Subsidiaries under any TBT Employee Plan, or the payment of cash based on an increase in the value thereof, (A) has, as to any employee of TBT or any of its Subsidiaries, an exercise price that was less than the fair market value of the underlying equity security as of the date such stock option or right was granted, as determined by TBT in good faith and in compliance with the relevant IRS guidance in effect on the date of grant (including, IRS Notice2005-1 and §1.409A-1 (b)(5)(iv) of the Treasury regulations), (B) has any feature for the deferral of compensation other than the deferral of recognition of income until the later of exercise or disposition of such option or right, or (C) has been granted after December 31, 2004, with respect to any class of stock of TBT or any of its Subsidiaries that is not “service recipient stock” (within the meaning of applicable regulations under Code §409A).

Section 3.29    Obligations to Employees. All accrued obligations and liabilities of TBT, each of its Subsidiaries and all TBT Employee Plans, for payments to trusts (including grantor trusts) or other funds, to any government agency or authority, or to any present or former director, officer, employee or agent (or his or her heirs, legatees or legal representatives) with respect to any of the matters listed below have been timely paid to the extent required by applicable Law or the terms of such plan, contract program, policy, or other governing instruments: (a) withholding Taxes, unemployment compensation or social security benefits; (b) all pension, profit-sharing, savings, stock purchase, stock bonus, stock ownership, stock option, phantom stock and stock appreciation rights plans and agreements; (c) all employment, deferred compensation (whether funded or unfunded), salary continuation, consulting, retirement, early retirement, severance, reimbursement, bonus or collective bargaining plans and agreements; (d) all executive and other incentive compensation plans, programs, or agreements; (e) all group insurance and health contracts, policies and plans; and (f) all other incentive, welfare (including vacation and sick pay), retirement or employee benefit plans or agreements maintained or sponsored, participated in, or contributed to, by TBT or any of its Subsidiaries for its current or former directors, officers, employees and agents. To the extent that payment of any obligation or liability under any of the foregoing is not currently required, adequate actuarial accruals and reserves for such payments have been and are being made by TBT or its Subsidiaries according to GAAP. All obligations and liabilities of TBT and each of its Subsidiaries for all other forms of compensation that are or may be payable to their current or former directors, officers, employees or agents, or pursuant to any Employee Plan, have been and are being paid to the extent required by applicable Law or by the plan or contract, and adequate actuarial accruals and reserves for payment therefor have been and are being made by TBT and each of its Subsidiaries according to GAAP. All accruals and reserves referred to in this Section are correctly and accurately reflected and accounted for in all material respects in the TBT Financial Statements and the books, statements and records of TBT and each of its Subsidiaries.

Section 3.30    Interest Rate Risk Management Instruments. Except as set forth onConfidential Schedule 3.30, neither TBT nor any of its Subsidiaries has any interest rate swaps, caps, floors and option agreements and other interest rate risk management arrangements, whether entered into for the account of TBT or any of its Subsidiaries or for the account of a customer of TBT or any of its Subsidiaries.

Section 3.31    Internal Controls. TBT and each of its Subsidiaries maintains accurate books and records reflecting its assets and liabilities and maintains adequate internal accounting controls that are designed to provide assurance that (a) transactions are executed with management’s authorization; (b) transactions are recorded as necessary to permit preparation of the consolidated financial statements of TBT and to maintain accountability for TBT’s and its Subsidiaries’ assets; (c) access to TBT’s and its Subsidiaries’ assets is permitted only in accordance with management’s authorization; (d) the reporting of TBT’s and its Subsidiaries’ assets is

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compared with existing assets at regular intervals; and (e) extensions of credit and other receivables are recorded accurately, and proper and adequate procedures are implemented to effect the collection thereof on a current and timely basis. Except as set forth onConfidential Schedule 3.31, none of TBT’s or any of its Subsidiaries’ systems, controls, data or information are recorded, stored, maintained, operated or otherwise wholly or partly dependent on or held by any means (including any electronic, mechanical or photographic process, whether computerized or not) which (including all means of access thereto and therefrom) are not under the exclusive ownership and direct control of TBT, any of its Subsidiaries or their accountants.

Section 3.32    Community Reinvestment Act. The Bank is in compliance in all material respects with the Community Reinvestment Act (the “CRA”) and all regulations issued thereunder. The Bank has a rating of not less than “satisfactory” as of its most recent CRA compliance examination and TBT has no Knowledge of any reason why the Bank would not receive a rating of “satisfactory” or better in its next CRA compliance examination or why the FDIC or any other Governmental Entity may seek to restrain, delay or prohibit the transactions contemplated hereby as a result of any act or omission of the Bank under the CRA.

Section 3.33    Fair Housing Act, Home Mortgage Disclosure Act, Real Estate Settlement Procedures Act and Equal Credit Opportunity Act. The Bank is in compliance in all material respects with the Fair Housing Act, the Home Mortgage Disclosure Act, the Real Estate Settlement Procedures Act and the Equal Credit Opportunity Act and all regulations issued thereunder. The Bank has not received any notice of any violation of those acts or any of the regulations issued thereunder, and the Bank has not received any notice of, nor does TBT have any Knowledge of, any threatened administrative inquiry, proceeding or investigation with respect to the Bank’snon-compliance with such acts.

Section 3.34    Usury Laws and Other Consumer Compliance Laws. All loans of the Bank have been made in accordance with all applicable statutes and regulatory requirements at the time of such loan or any renewal thereof, including without limitation, the Texas usury statutes as they are currently interpreted, Regulation Z issued by the Federal Reserve, the Federal Consumer Credit Protection Act and all statutes and regulations governing the operation of banks chartered under the Laws of the State of Texas. Each loan on the books of the Bank was made in the ordinary course of business.

Section 3.35    Bank Secrecy Act, Foreign Corrupt Practices Act and U.S.A. Patriot Act. TBT and the Bank are in compliance with the Bank Secrecy Act, the United States Foreign Corrupt Practices Act and the International Money Laundering Abatement and Anti-Terrorist Financing Act, otherwise known as the U.S.A. Patriot Act, and all regulations issued thereunder, and the Bank has properly certified all foreign deposit accounts and has made all necessary tax withholdings on all of its deposit accounts; furthermore, the Bank has timely and properly filed and maintained all requisite Currency Transaction Reports and other related forms, including any requisite Custom Reports required by any agency of the United States Treasury Department, including the IRS. The Bank has timely filed all Suspicious Activity Reports with the Financial Institutions—Financial Crimes Enforcement Network (U.S. Department of the Treasury) required to be filed by it under the Laws referenced in this Section.

Section 3.36    Unfair, Deceptive or Abusive Acts or Practices. Neither TBT nor any of its Subsidiaries has engaged in any unfair, deceptive or abusive acts or practices, as such terms are defined under §1031 of the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”). There are no allegations, claims or disputes to which TBT or any of its Subsidiaries is a party that allege, or to the Knowledge of TBT, no Person has threatened to allege, that TBT or any of its Subsidiaries has engaged in any unfair, deceptive or abusive acts or practices.

Section 3.37    Proxy Statement/Prospectus. None of the information supplied or to be supplied by TBT or any of its Subsidiaries or any of its directors, officers, employees or agents for inclusion in the Proxy Statement/Prospectus shall, at the date the Proxy Statement/Prospectus is mailed to the shareholders of TBT and, as the Proxy Statement/Prospectus may be amended or supplemented, at the time of the Shareholders’ Meeting, contain

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any untrue statement of a material fact or omit to state any material fact with respect to TBT or any of its Subsidiaries necessary in order to make the statements therein with respect to TBT and any of its Subsidiaries, in light of the circumstances under which they are made, not misleading or necessary to correct any statement in any earlier communication with respect to the solicitation of any proxy for the Shareholders’ Meeting. All documents that TBT is responsible for filing with any Regulatory Agency in connection with the Merger shall comply with respect to TBT and each of its Subsidiaries with the provisions of applicable Law.

Section 3.38    Agreements Between TBT and its Subsidiaries; Claims. Except as set forth onConfidential Schedule 3.38, there are no written or oral agreements or understandings between TBT and any of its Subsidiaries. All past courses of dealings between TBT and each of its Subsidiaries have been conducted in the ordinary course of business, on arms-length terms consistent with applicable Law and prudent business practices. TBT has no Knowledge of any claims that TBT has against any of its Subsidiaries or of any facts or circumstances that would give rise to any such claim.

Section 3.39    Representations Not Misleading. No representation or warranty by TBT contained in this Agreement, nor any written statement, exhibit or schedule furnished to FFIN by TBT under and pursuant to this Agreement, contains or will contain on the Closing Date any untrue statement of a material fact or omits or will omit to state a material fact necessary to make the statements contained herein or therein, in light of the circumstances under which it was or will be made, not misleading and such representations and warranties would continue to be true and correct following disclosure to any Governmental Entity having jurisdiction over TBT or its properties of the facts and circumstances upon which they were based.

Section 3.40    State Takeover Laws. The TBT Board has approved this Agreement and the transactions contemplated hereby as required to render inapplicable to such agreements and transactions any applicable provisions of the takeover Laws of any state, including any “moratorium,” “control share,” “fair price,” “takeover” or “interested shareholder” Law.

Section 3.41    Opinion of Financial Advisor. Prior to the execution of this Agreement, the TBT Board has received an opinion (which, if initially rendered orally, has been or will be confirmed by a written opinion, dated the same date) from the advisor set forth onConfidential Schedule 3.41, to the effect that, as of the date thereof, and based upon and subject to the factors, assumptions and limitations set forth therein, the Merger Consideration payable pursuant to this Agreement is fair, from a financial point of view, to the holders of TBT Stock. Such opinion has not been amended or rescinded in any material respect as of the date of this Agreement.

Section 3.42    No Other Representations or Warranties. Except as expressly set forth inArticle III of this Agreement, none of TBT, its Subsidiaries or any other Person is making or has made, and none of them shall have liability in respect of, any written or oral representation or warranty, express or implied, at Law, in equity or otherwise, with respect to TBT or any of its Subsidiaries or otherwise, and whether express or implied, at Law, in equity or otherwise, in respect of this Agreement or the transactions contemplated thereby, or in respect of any other matter whatsoever. TBT acknowledges and agrees that neither FFIN nor any other person has made or is making any express or implied representation or warranty other than those contained inArticle IV.

ARTICLE IV

REPRESENTATIONS AND WARRANTIES OF FFIN

Except (i) as disclosed in the disclosure schedules delivered by FFIN to TBT prior to the execution hereof; provided, that (a) no such item is required to be set forth as an exception to a representation or warranty if its absence would not result in the related representation or warranty being deemed untrue or incorrect, (b) the mere inclusion of an item in the disclosure schedules as an exception to a representation or warranty shall not be deemed an admission by FFIN of liability or that such item represents a material exception or fact, event or

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circumstance or that such item is reasonably likely to result in a Material Adverse Change or to represent a determination that such item did not arise in the ordinary course of business, and (c) any disclosures made with respect to a section of thisArticle IV shall be deemed to qualify (1) any other section of thisArticle IV specifically referenced or cross-referenced, and (2) other sections of thisArticle IV to the extent it is reasonably apparent on its face (notwithstanding the absence of a specific cross reference) from a reading of the disclosure that such disclosure applies to such other sections, or (ii) as disclosed in any FFIN SEC Report filed prior to the date hereof (but disregarding risk factor disclosures contained under the heading “Risk Factors,” or disclosures of risks set forth in any “forward-looking statements” disclaimer or any other statements that are similarlynon-specific or cautionary, predictive or forward-looking in nature), FFIN hereby represents and warrants to TBT as follows:

Section 4.01    Organization and Qualification.

(a)    FFIN is a corporation, duly organized, validly existing and in good standing under the Laws of the State of Texas and is a bank holding company registered under the BHCA. FFIN has the corporate power and authority (including all licenses, franchises, permits and other governmental authorizations as are legally required) to carry on its business as now being conducted, to own, lease and operate its properties and assets as now owned, leased or operated and to enter into and carry out its obligations under this Agreement. True and complete copies of the certificate of formation and bylaws of FFIN, as amended to date, have been made available to TBT.

(b)    FFB is a national banking association, duly organized and validly existing under the Laws of the United States and in good standing under the Laws of the State of Texas. FFB has the corporate power and authority (including all licenses, franchises, permits and other governmental authorizations as are legally required) to carry on its business as now being conducted, to own, lease and operate its properties and assets as now owned, leased or operated and to enter into and to carry on the business and activities now conducted by it. True and complete copies of the articles of association and bylaws of FFB, as amended to date, have been made available to TBT. FFB is an insured depository institution as defined in the FDIA and is a member of the Federal Reserve System.

(c)    Merger Sub is a corporation, duly organized, validly existing and in good standing under the Laws of the State of Texas. Merger Sub has the corporate power and authority (including all licenses, franchises, permits and other governmental authorizations as are legally required) to carry on its business as now being conducted, to own, lease and operate its properties and assets as now owned, leased or operated and to enter into and carry out its obligations under this Agreement. True and complete copies of the certificate of formation and bylaws of Merger Sub, as amended to date, have been made available to TBT.

Section 4.02    Execution and Delivery.

(a)    FFIN has the requisite corporate power and authority to execute and deliver this Agreement and to consummate the transactions contemplated herein. FFIN has taken all action necessary to authorize the execution, delivery and (provided the required regulatory approvals are obtained) performance of this Agreement and the other agreements and documents contemplated hereby to which it is a party. This Agreement has been, and the other agreements and documents contemplated hereby to which FFIN is a party, have been or at Closing will be, duly executed by FFIN, and each constitutes the legal, valid and binding obligation of FFIN, enforceable in accordance with its respective terms and conditions, except as enforceability may be limited by the Bankruptcy Exception.

(b)    Merger Sub has the requisite corporate power and authority to execute and deliver this Agreement and to consummate the transactions contemplated herein. Merger Sub has taken all action necessary to authorize the execution, delivery and (provided the required regulatory and shareholder approvals are obtained) performance of this Agreement and the other agreements and documents contemplated hereby to which it is a party. This Agreement has been, and the other agreements and documents contemplated hereby to which Merger Sub is a party, have been or at Closing will be, duly executed by Merger Sub, and each constitutes

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the legal, valid and binding obligation of Merger Sub, enforceable in accordance with its respective terms and conditions, except as enforceability may be limited by the Bankruptcy Exception.

Section 4.03    Capitalization.

(a)    The entire authorized capital stock of FFIN consists solely of 200,000,000 shares of common stock, par value $0.01 per share, of which 135,809,224 shares were issued as of June 30, 2019.

(b)    At the Effective Time, the shares of FFIN Stock issued pursuant to the Merger will be duly authorized, validly issued, fully paid and nonassessable, will not be issued in violation of any preemptive rights or any applicable federal or state securities Laws, and will not be subject to any restrictions on transfer arising under the Securities Act of 1933, as amended (the “Securities Act”), except for shares issued to any shareholder of TBT who may be deemed to be an “affiliate” (under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) of FFIN after completion of the Merger.

Section 4.04    SEC Filings; Financial Statements.

(a)    FFIN has filed and made available to TBT all forms, reports, and documents required to be filed by FFIN with the SEC since December 31, 2015 (collectively, the “FFIN SEC Reports”). The FFIN SEC Reports (i) at the time filed, complied in all material respects with the applicable requirements of the Securities Act and the Exchange Act, as the case may be, and (ii) did not at the time they were filed (or if amended or superseded by a filing prior to the date of this Agreement, then on the date of such filing) contain any untrue statement of a material fact or omit to state a material fact required to be stated in such FFIN SEC Reports or necessary in order to make the statements in such FFIN SEC Reports, in light of the circumstances under which they were made, not misleading. Except for any Subsidiaries of FFIN that are registered as a broker, dealer or investment advisor or filings required due to fiduciary holdings of such Subsidiaries of FFIN, no Subsidiary of FFIN is required to file any forms, reports or other documents with the SEC.

(b)    The financial statements of FFIN contained in the FFIN SEC Reports, including any FFIN SEC Reports filed after the date of this Agreement until the Effective Time, complied or will comply as to form in all material respects with the applicable published rules and regulations of the SEC with respect thereto, was or will be prepared in accordance with GAAP applied on a consistent basis throughout the periods involved (except as may be indicated in the notes to such financial statements or, in the case of unaudited statements, as permitted by Form10-Q of the SEC), and fairly presented or will fairly present the consolidated financial position of FFIN and its Subsidiaries as at the respective dates and the consolidated results of its operations and cash flows for the periods indicated, except that the unaudited interim financial statements were or are subject to normal and recurringyear-end adjustments which were not or are not expected to be material in amount or effect.

Section 4.05    Compliance with Laws, Permits and Instruments.

(a)    Except as set forth onConfidential Schedule 4.05, each of FFIN and FFB holds all material licenses, registrations, franchises, permits and authorizations necessary for the lawful conduct of its business and is not in violation of any applicable Law or Order of any Governmental Entity, which is reasonably likely to result in a Material Adverse Change as to FFIN, individually or in the aggregate, or to the Knowledge of FFIN is reasonably likely to materially and adversely affect, prevent or delay the obtaining of any regulatory approval for the consummation of the transactions contemplated by this Agreement.

(b)    Except as set forth onConfidential Schedule 4.05, each of FFIN and FFB has in all material respects performed and abided by all obligations required to be performed by it to the date hereof, and has complied with, and is in compliance with, and is not in default (or with the giving of notice or the passage of time shall not be in default) under, or in violation of, (i) any provision of the certificate of formation or bylaws of FFIN, the articles of association or bylaws of FFB, or other governing documents of FFIN or FFB, as applicable (collectively, the “FFIN Constituent Documents”), (ii) any material provision of any mortgage,

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indenture, lease, contract, agreement or other instrument applicable to FFIN or any Subsidiary of FFIN, or their respective assets, operations, properties or businesses now conducted or heretofore conducted, or (iii) any permit, concession, grant, franchise, license, authorization, judgment, writ, injunction, Order, decree or award of any Governmental Entity applicable in any material respect to FFIN or any Subsidiary of FFIN or their respective assets, operations, properties or businesses now conducted or heretofore conducted.

(c)    Except as set forth onConfidential Schedule 4.05, the execution, delivery and (provided the required regulatory approvals are obtained) performance of this Agreement and the other agreements contemplated hereby, and the completion of the transactions contemplated hereby and thereby will not conflict with, or result, by itself or with the giving of notice or the passage of time, in any violation of or default or loss of a benefit under, (i) the FFIN Constituent Documents, (ii) any material mortgage, indenture, lease, contract, agreement or other instrument applicable to FFIN or any Subsidiary of FFIN, or their respective assets, operations, properties or businesses, or (iii) any material permit, concession, grant, franchise, license, authorization, judgment, writ, injunction, Order, decree, statute, Law, ordinance, rule or regulation applicable to FFIN or any Subsidiary of FFIN or their respective assets, operations, properties or businesses.

Section 4.06    Undisclosed Liabilities. FFIN has no material liability or obligation, accrued, absolute, contingent or otherwise and whether due or to become due (including, without limitation, unfunded obligations under any employee benefit plan maintained by FFIN or liabilities for federal, state or local taxes or assessments) that are not reflected in or disclosed in the FFIN SEC Reports, except those liabilities and expenses incurred in the ordinary course of business and consistent with past business practices since the date of the latest balance sheet of FFIN included in the FFIN SEC Reports, and that are not, individually or in the aggregate, material to FFIN.

Section 4.07    Litigation.

(a)    Except as set forth onConfidential Schedule 4.07, FFIN is not a party to any, and there are no pending or, to the Knowledge of FFIN, threatened, legal, administrative, arbitral or other proceedings, claims, actions or governmental or regulatory investigations of any nature against FFIN or FFB that are reasonably likely, individually or in the aggregate, to result in a Material Adverse Change as to FFIN or FFB, nor, to the Knowledge of FFIN, is there any basis for any proceeding, claim or any action against FFIN or FFB that would be reasonably likely, individually or in the aggregate, to result in a Material Adverse Change as to FFIN or FFB. There is no Order, imposed upon FFIN of FFB or the assets or property of FFIN of FFB that has resulted in, or is reasonably likely to result in, a Material Adverse Change as to FFIN or FFB.

(b)    No legal action, suit or proceeding or judicial, administrative or governmental investigation is pending or, to the Knowledge of FFIN, threatened against FFIN that questions or might question the validity of this Agreement or the agreements contemplated hereby or any actions taken or to be taken by FFIN pursuant hereto or thereto or seeks to enjoin or otherwise restrain the transactions contemplated hereby or thereby.

Section 4.08    Consents and Approvals. Except for (a) the filing of applications, filings and notices, as applicable, with the NASDAQ, (b) the filing of applications, filings and notices, as applicable, with the Federal Reserve under the BHCA and approval of such applications, filings and notices, (c) the filing of applications, filings and notices, as applicable, with the TDB and OCC in connection with the Bank Merger, and approval of such applications, filings and notices, (d) the filing with the SEC of (i) any filings under applicable requirements of the Exchange Act, including the filing of the Proxy Statement/Prospectus, and (ii) the Registration Statement and declaration of effectiveness of the Registration Statement, (e) the filing of the certificates of merger with the Texas Secretary of State pursuant to the requirements of the TBOC, and (f) such filings and approvals as are required to be made or obtained under the securities or “Blue Sky” Laws of various states in connection with the issuance of shares of FFIN Stock pursuant to this Agreement and the approval of the listing of such FFIN Stock on the NASDAQ, no consents, Orders or approvals of or filings or registrations with any Governmental Entity are necessary in connection with (A) the execution and delivery by FFIN and Merger Sub of this Agreement, or (B) the consummation by FFIN and Merger Sub of the transactions contemplated by this Agreement. As of the

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date of this Agreement, FFIN knows of no reason why all regulatory approvals from any Governmental Entity or Regulatory Agency required for the consummation of the transactions contemplated hereby should not be obtained on a timely basis and FFIN has no Knowledge of any fact or circumstance that would materially delay receipt of any such required regulatory approval.

Section 4.09    Regulatory Compliance.

(a)    Except as set forth onConfidential Schedule 4.09, FFIN is not subject to anycease-and-desist or other Order or enforcement action issued by, or is a party to any written agreement, consent agreement or memorandum of understanding with, or is a party to any commitment letter or similar undertaking to, or is subject to any Order or directive by, or has been ordered to pay any civil penalty by, or is a recipient of a supervisory letter from, or has adopted any board resolutions at the request or suggestion of any Regulatory Agency or other Governmental Entity that restricts the conduct of its business or that relates to its capital adequacy, its ability to pay dividends, its credit or risk management policies, its management or its business. Except as set forth onConfidential Schedule 4.09, there is no unresolved violation, criticism or exception by any Regulatory Agency or other Governmental Entity with respect to any report or statement relating to any examinations of FFIN or FFB. FFIN is “well-capitalized” (as that term is defined in 12 C.F.R. § 225.2(r)) and “well managed” (as that term is defined is 12 C.F.R. § 225.2(s)). FFB is an “eligible bank” (as that term is defined in 12 C.F.R. § 5.3(g)). Notwithstanding the foregoing, neither party shall be required to take any action under this Agreement that would cause such party to violate 12 C.F.R. §309.6.

(b)    All material reports, records, registrations, statements, notices and other documents or information required to be filed by FFIN with any Regulatory Agency have been duly and timely filed and all information and data contained in such reports, records or other documents are substantially true, accurate, correct and complete.

Section 4.10    Proxy Statement/Prospectus. None of the information supplied or to be supplied by FFIN or any of its directors, officers, employees or agents for inclusion in the Proxy Statement/Prospectus shall, at the date the Proxy Statement/Prospectus is mailed to the shareholders of TBT and, as the Proxy Statement/Prospectus may be amended or supplemented, at the time of the Shareholders’ Meeting, contain any untrue statement of a material fact or omit to state any material fact with respect to FFIN or any Subsidiary of FFIN necessary in order to make the statements therein with respect to FFIN or any Subsidiary of FFIN, in light of the circumstances under which they are made, not misleading or necessary to correct any statement in any earlier communication with respect to the solicitation of any proxy for the Shareholders’ Meeting. All documents that FFIN is responsible for filing with any regulatory or governmental agency in connection with the Merger shall comply with respect to FFIN in all material respects with the provisions of applicable Law.

Section 4.11    Absence of Certain Changes. Since December 31, 2018, (a) FFIN has conducted its business in the ordinary course (excluding the incurrence of expenses related to this Agreement and the transactions contemplated hereby), and (b) no event has occurred or circumstance arisen that, individually or in the aggregate, has had or is reasonably likely to have, a Material Adverse Change on FFIN.

Section 4.12    FFIN Disclosure Controls and Procedures. Except as set forth onConfidential Schedule 4.12, none of FFIN’s records, systems, controls, data or information, are recorded, stored, maintained and operated wholly or partly dependent on or held by any means (including any electronic, mechanical or photographic process, whether computerized or not) which (including all means of access thereto and therefrom) are not under the exclusive ownership and direct control of FFIN or its accountants. FFIN (and each of its Subsidiaries) has devised, established and maintained a system of “internal controls over financial reporting” (as defined in Rules13a-15(f) and15d-15(f) of the Exchange Act) that is sufficient to provide reasonable assurance (i) regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP (except as otherwise required by RAP), (ii) that receipts and expenditures of FFIN and its Subsidiaries are being made only in accordance with authorizations of management and the FFIN Board, and (iii) regarding prevention or timely detection of the unauthorized acquisition, use or disposition of FFIN’s and its

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Subsidiaries’ assets that could have a material effect on FFIN’s financial statements. FFIN’s “disclosure controls and procedures” (as defined in Rules13a-15(e) and15d-15(e) of the Exchange Act) are reasonably designed to ensure that information required to be disclosed by FFIN in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the SEC, and that all such information is accumulated and communicated to FFIN’s management as appropriate to allow timely decisions regarding required disclosure and to make the certifications of the chief executive officer and chief financial officer of FFIN required under the Exchange Act with respect to such reports. FFIN has disclosed, based on its most recent evaluation prior to the date of this Agreement, to FFIN’s auditors and the audit committee of the FFIN Board (i) any significant deficiencies and material weaknesses in the design or operation of internal controls over financial reporting which are reasonably likely to adversely affect in any material respect FFIN’s ability to record, process, summarize and report financial information, and (ii) any fraud, whether or not material, that involves management or other employees who have a significant role in FFIN’s internal controls over financial reporting. For purposes of this Agreement, the terms “significant deficiency” and “material weakness” shall have the meaning assigned to them in Public Company Accounting Oversight Board Auditing Standard 5, as amended and in effect on the date of this Agreement.

Section 4.13    Taxes.

(a)    FFIN and each of its Subsidiaries have duly and timely filed all federal, state and other material Tax Returns that they were required to file under applicable Laws with the appropriate Governmental Entity. All such Tax Returns were correct and complete in all material respects and have been prepared in compliance with all applicable Laws and all material Taxes due and owing by FFIN and each of its Subsidiaries have been timely and properly paid.

(b)    FFIN and each of its Subsidiaries have collected or withheld and duly paid to the appropriate Governmental Entity all material Taxes required to have been collected or withheld and so paid in connection with amounts paid or owing to any employee, independent contractor, creditor, shareholder or other third party.

(c)    There is no action, suit, proceeding, audit, assessment, dispute or claim concerning any material Tax liability of FFIN or any of its Subsidiaries either (i) claimed or raised by any Governmental Entity in writing, or (ii) as to which FFIN or any of its Subsidiaries has Knowledge based upon personal contact with any agent of such authority. To the Knowledge of FFIN, no taxing authority has threatened in writing to assess additional Taxes for any period for which Tax Returns have been filed.

(d)    Neither FFIN nor any of its Subsidiaries has participated in a reportable or listed transaction as defined under Section 6011 and 6111 of the Code and Treasury Regulation§ 1.6011-4. Neither FFIN nor any of its Subsidiaries has been required to disclose on its federal income Tax Returns any position that could give rise to a substantial understatement of federal income Tax within the meaning of Section 6662 of the Code.

(e)    Neither FFIN nor any of its Subsidiaries is aware of any fact or circumstance that reasonably could be expected to prevent the Integrated Mergers from qualifying as a reorganization within the meaning of Section  368(a) of the Code.

Section 4.14    Employee Benefit Plans. All Employee Plans that (i) are sponsored, maintained, or contributed to, by FFIN and any of its Subsidiaries, or with respect to which FFIN and any of its Subsidiaries has or could reasonably be expected to have any liability thereunder and (ii) provide benefits to, or for the welfare of, any current of former officer, director, independent contractor, employee, or service provider of FFIN or any of its Subsidiaries, or the dependents or spouses of any such Person, regardless of whether funded (the “FFIN Employee Plans”), have been maintained and operated in material compliance with applicable Law and the terms of the plans. There have been no prohibited transactions (as defined in Code §4975(c)(1)), breaches of fiduciary duty or any other breaches or violations of any Law applicable to the FFIN Employee Plans that would directly or indirectly subject FFIN, any of its Subsidiaries, or any FFIN Employee Plan to any taxes, penalties, or other liabilities (including any liability arising from any indemnification agreement or policy), except as would not

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reasonably be expected to result in a material liability. Except as set forth onConfidential Schedule 4.14,either FFIN nor any corporation or trade or business that is a member of a controlled group with FFIN for purposes of Title IV of ERISA or Code §414 currently maintains, contributes to, or has an obligation to contribute to, or during the six year period ending on the Closing Date, has maintained, contributed to, or had an obligation to contribute to, (i) an “employee pension benefit plan” (as defined under ERISA § 3(2)) that is subject to Title IV or Code §412, (ii) a “multiple employer plan” (as described in Code §413(c)), (iii) a “multiemployer plan” (as defined in ERISA §3(37)) or (iv) a “multiple employer welfare arrangement” (as defined in ERISA §3(40)). No written or oral representations have been made by or on behalf of FFIN or any of its Subsidiaries to any employee or former employee of FFIN or any of its Subsidiaries promising or guaranteeing any employer payment or funding for the continuation of medical, dental, life or disability coverage or any other welfare benefit (as defined in ERISA §3(1)) for any period of time beyond the end of the current plan year (except to the extent of coverage required under Code §4980B).

Section 4.15    Representations Not Misleading. No representation or warranty by FFIN contained in this Agreement, nor any written statement, exhibit or schedule furnished to TBT by FFIN under and pursuant to this Agreement, contains or will contain on the Closing Date any untrue statement of a material fact or omits or will omit to state a material fact necessary to make the statements contained herein or therein, in light of the circumstances under which it was or will be made, not misleading and such representations and warranties would continue to be true and correct following disclosure to any Governmental Entity having jurisdiction over FFIN or their properties of the facts and circumstances upon which they were based.

Section 4.16    No Other Representations or Warranties. Except as expressly set forth inArticle IV of this Agreement, none of FFIN, its Subsidiaries or any other Person is making or has made, and none of them shall have liability in respect of, any written or oral representation or warranty, express or implied, at Law, in equity or otherwise, with respect to FFIN or any of its Subsidiaries or otherwise, and whether express or implied, at Law, in equity or otherwise, in respect of this Agreement or the transactions contemplated thereby, or in respect of any other matter whatsoever. FFIN acknowledges and agrees that neither TBT nor any other person has made or is making any express or implied representation or warranty other than those contained inArticle III.

ARTICLE V

COVENANTS OF TBT

Section 5.01    Commercially Reasonable Efforts. TBT will use commercially reasonable efforts to perform and fulfill all conditions and obligations on its part to be performed or fulfilled under this Agreement and to cause the completion of the transactions contemplated hereby in accordance with this Agreement.

Section 5.02    Shareholders’ Meeting. TBT, acting through the TBT Board, shall, in accordance with applicable Law:

(a)    duly call, give notice of, convene and hold a meeting of its shareholders (the “Shareholders’ Meeting”) as soon as practicable after the Registration Statement and the Proxy Statement/Prospectus (forming a part of the Registration Statement) become effective with the SEC for the purpose of approving and adopting this Agreement and the Merger;

(b)    require no greater than the minimum vote of the capital stock of TBT required by applicable Law and the TBT Constituent Documents in order to approve this Agreement and the Merger (the “TBT Shareholder Approval”);

(c)    include in the Proxy Statement/Prospectus the recommendation of the TBT Board that the shareholders of TBT vote in favor of the approval and adoption of this Agreement and the Merger; and

(d)    cause the Proxy Statement/Prospectus to be mailed to the shareholders of TBT as soon as practicable after the Registration Statement and the Proxy Statement/Prospectus (forming a part of the Registration

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Statement) become effective with the SEC, and use its commercially reasonable efforts to obtain the TBT Shareholder Approval. The letter to shareholders, notice of meeting, proxy statement of TBT and form of proxy to be distributed to shareholders in connection with this Agreement and the Merger shall be in form and substance reasonably satisfactory to FFIN and are collectively referred to herein as the “Proxy Statement/Prospectus”.

Section 5.03    Information Furnished by TBT. TBT and the Bank shall promptly following receipt of a written request from FFIN furnish or cause to be furnished to, all information concerning TBT, including but not limited to financial statements, required for inclusion in any statement or application made or filed by FFIN to any Governmental Entity in connection with the transactions contemplated by this Agreement (including the Registration Statement and the Proxy Statement/Prospectus) or in connection with any unrelated transactions during the pendency of this Agreement. TBT represents and warrants that all information so furnished shall be true and correct in all material respects and shall not omit any material fact required to be stated therein or necessary to make the statements made, in light of the circumstances under which they were made, not misleading. TBT and the Bank shall otherwise fully cooperate with FFIN in the filing of any applications or other documents necessary to consummate the transactions contemplated by this Agreement.

Section 5.04    Required Acts. Between the date of this Agreement and the Closing, TBT will, and will cause each of its Subsidiaries including the Bank to, unless otherwise permitted in writing by FFIN:

(a)    operate (including, without limitation, the making of, or agreeing to make, any loans or other extensions of credit) only in the ordinary course of business and consistent with past practices and safe and sound banking principles;

(b)    except as required by prudent business practices, use commercially reasonable efforts to preserve its business organization intact and to retain its present directors, officers, employees, key personnel and customers, depositors and goodwill and to maintain all assets owned, leased or used by it (whether under its control or the control of others), in good operating condition and repair, ordinary wear and tear excepted;

(c)    perform all of its obligations under any material contracts, leases and documents relating to or affecting its assets, properties and business, except such obligations as TBT or any of its Subsidiaries may in good faith reasonably dispute;

(d)    maintain in full force and effect all insurance policies now in effect or renewals thereof and give all notices and present all claims under all insurance policies in due and timely fashion;

(e)    timely file, subject to extensions, all reports required to be filed with any Governmental Entity and observe and conform, in all material respects, to all applicable Laws, except those being contested in good faith by appropriate proceedings;

(f)    timely file, subject to extensions, all Tax Returns required to be filed by it and timely pay all Taxes assessments, governmental charges, duties, penalties, interest and fines that become due and payable, except those being contested in good faith by appropriate proceedings and properly accrued in accordance with GAAP;

(g)    promptly notify FFIN of any Tax proceeding or claim pending or threatened against or with respect to TBT or any of its Subsidiaries;

(h)    withhold from each payment made to each of its employees, independent contractors, creditors and other third parties the amount of all Taxes required to be withheld therefrom and pay the same to the proper Governmental Entity when due;

(i)    account for all transactions and prepare all financial statements in accordance with GAAP (unless otherwise instructed by RAP in which instance account for such transaction in accordance with RAP);

(j)    promptly classify and charge off loans and make appropriate adjustments to loss reserves in accordance with GAAP, RAP and the instructions to the Call Report and the Uniform Retail Credit Classification and Account Management Policy;

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(k)    maintain the allowance for loan and lease losses account in an amount adequate in all material respects to provide for all losses, net of recoveries relating to loans previously charged off, on all outstanding loans and in compliance with GAAP and applicable regulatory requirements;

(l)    pay or accrue all costs, expenses and other charges to be incurred in connection with the Merger, including, but not limited to, all legal fees, termination fees, retention bonuses, bonuses, accounting fees, consulting fees, investment banking or brokerage fees and fairness opinion fees, prior to the Closing Date; and

(m)    ensure that all accruals for Taxes are accounted for in the ordinary course of business, consistent with past practices and in accordance with its GAAP (unless otherwise instructed by RAP in which case such accrual will be accounted for in accordance with RAP).

Section 5.05    Prohibited Acts. Except as set forth onConfidential Schedule 5.05,TBT will not, and will not permit any of its Subsidiaries including the Bank to, without the prior written consent of FFIN; provided, that TBT is not required to obtain such consent with respect toSection 5.05(j), (q),(r), or(s) until FFIN’s receipt of the approvals contemplated bySection 8.04:

(a)    take or fail to take any action that would cause the representations and warranties made inArticle III to be inaccurate at the time of the Closing or preclude TBT from making such representations and warranties at the time of the Closing;

(b)    merge into, consolidate with or sell its assets to any other Person or entity, change or amend TBT’s or any of its Subsidiaries’ articles of incorporation or bylaws, increase the number of shares of TBT Stock (other than by exercise of TBT Options and TBT Warrants that are outstanding as of the date of this Agreement) or any of its Subsidiaries’ stock outstanding or increase the amount of the Bank’s surplus (as calculated in accordance with the instructions to the Call Report);

(c)    except as explicitly permitted hereunder or in accordance with applicable Law or pursuant to a contract existing as of the date of this Agreement, engage in any transaction with any affiliated Person or allow such Persons to acquire any assets from TBT or any of its Subsidiaries, except (i) in the form of wages, salaries, fees for services, reimbursement of expenses and benefits already granted or accrued under the Employee Plans currently in effect, or (ii) any deposit (in any amount) made by an officer, director or employee;

(d)    except for the Permitted Dividends, declare, set aside or pay any dividends or make any other distribution to its shareholders (including any share dividend, dividends in kind or other distribution) whether in cash, shares or other property or purchase, retire or redeem, or obligate itself to purchase, retire or redeem, any of its capital shares or other securities;

(e)    discharge or satisfy any Lien or pay any obligation or liability, whether absolute or contingent, due or to become due, except in the ordinary course of business consistent with past practices and except for liabilities incurred in connection with the transactions contemplated hereby;

(f)    issue, reserve for issuance, grant, sell or authorize the issuance of any shares of its capital stock or other securities or subscriptions, options, warrants, calls, rights or commitments of any kind relating to the issuance thereto;

(g)    accelerate the vesting of pension or other benefits in favor of employees of TBT or any of its Subsidiaries except according to the Employee Plans or as otherwise contemplated by this Agreement or as required by applicable Law;

(h)    acquire any capital stock or other equity securities or acquire any equity or ownership interest in any bank, corporation, partnership or other entity (except (i) through settlement of indebtedness, foreclosure, or the exercise of creditors’ remedies, or (ii) in a fiduciary capacity, the ownership of which does not expose it to any liability from the business, operations or liabilities of such Person);

(i)    mortgage, pledge or subject to Lien any of its property, business or assets, tangible or intangible, except (i) Permitted Encumbrances, and (ii) pledges of assets to secure public funds deposits;

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(j)    except for sales of investment securities in the ordinary course of business, sell, transfer, lease to others or otherwise dispose of any of its assets, or cancel or compromise any debt or claim, or waive or release any right or claim of a market value in excess of $50,000;

(k)    except for the Scheduled Payments, make any change in the rate or timing of payment of compensation, commission, bonus or other direct or indirect remuneration payable, or pay or agree or orally promise to pay, conditionally or otherwise, any bonus, extra compensation, pension or severance or vacation pay, to or for the benefit of any of its shareholders, directors, officers, employees or agents, other than annual increases in compensation consistent with past practices, and bonuses, commissions, and incentives consistent with past and normal practices to its employees and officers;

(l)    except for the Scheduled Payments, enter into any employment or consulting contract (other than as contemplated by the terms of the Employee Plans or this Agreement) or other agreement with any current or proposed director, officer or employee or adopt, amend any employment agreement, amend in any material respect or terminate any pension, employee welfare, retirement, stock purchase, stock option, phantom stock, stock appreciation rights, termination, severance, income protection, golden parachute, savings or profit-sharing plan (including trust agreements and insurance contracts embodying such plans), any deferred compensation, or collective bargaining agreement, any group insurance contract or any other incentive, welfare or employee benefit plan or agreement for the benefit of its directors, employees or former employees, except as required by applicable Law or by this Agreement;

(m)    make any capital expenditures or capital additions or betterments except for such capital expenditures or capital additions that are set forth in writing in the budget provided to FFIN or that are necessary to prevent substantial deterioration of the condition of a property;

(n)    sell or dispose of, or otherwise divest itself of the ownership, possession, custody or control, of any corporate books or records of any nature that, in accordance with sound business practice, normally are retained for a period of time after their use, creation or receipt, except at the end of the normal retention period;

(o)    make any, or acquiesce with any, change in any (i) credit underwriting standards or practices, including loan loss reserves, (ii) asset liability management techniques, (iii) accounting methods, principles or practices, except as required by changes in GAAP as concurred by TBT’s independent auditors, or as required by any applicable Regulatory Agency, (iv) tax election, change in taxable year, accounting methods for Tax purposes, amendment of a Tax Return, restriction on any assessment period relating to Taxes, settlement of any Tax claim or assessment relating to TBT or any of its Subsidiaries, “closing agreement” within the meaning of Section 7121 of the Code (or any similar provision of state, local or foreign Law), or surrender any claim to a refund, or (v) any extension or waiver of the limitation period applicable to any Tax claim or assessment relating to TBT or its Subsidiaries;

(p)    reduce the amount of the Bank’s allowance for loan losses except through charge offs;

(q)    purchase any investment securities, other than purchases of obligations of the U.S. Treasury (or any agency thereof) with a duration of four (4) years or less and an AA rating by at least one nationally recognized ratings agency;

(r)    renew, extend the maturity of, or alter any of the terms of any loan classified by TBT as “special mention,” “substandard,” or “impaired” or other words of similar import; or

(s)    enter into any acquisitions or leases of real property, including new leases and lease extensions.

Section 5.06    Access;Pre-Closing Investigation.

(a)    Upon reasonable notice and subject to applicable Laws, TBT will afford the officers, directors, employees, attorneys, accountants, investment bankers and authorized representatives of FFIN full access (excluding any information that is prohibited from being disclosed by applicable Law) during normal business hours to the properties, books, contracts and records of TBT and each of its Subsidiaries, permit

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FFIN to make such inspections (including with regard to such properties physical inspection of the surface and subsurface thereof and any structure thereon pursuant toSection 5.12) as FFIN may reasonably require and furnish to FFIN during such period all such information concerning TBT, each of its Subsidiaries and its affairs as FFIN may reasonably request, in order that FFIN may have full opportunity to make such reasonable investigation as it desires to make of the affairs of TBT and each of its Subsidiaries, including access sufficient to verify the value of the assets and the liabilities of TBT and each of its Subsidiaries and the satisfaction of the conditions precedent to FFIN’s obligations described inArticle VIII of this Agreement. FFIN will use its commercially reasonable efforts not to disrupt the normal business operations of TBT or any of its Subsidiaries. TBT agrees at any time, and from time to time, to furnish to FFIN as soon as practicable, any additional information that FFIN may reasonably request. Neither TBT nor any of its Subsidiaries shall be required to provide access to or to disclose information where such access or disclosure would violate or prejudice the rights of TBT’s or any of its Subsidiaries’ customers, jeopardize the attorney-client privilege of the institution in possession or control of such information (after giving due consideration to the existence of any common interest, joint defense or similar agreement between the parties) or contravene any Law, rule, regulation, Order, judgment, decree, fiduciary duty or binding agreement entered into prior to the date of this Agreement.

(b)    No investigation by either party of the business and affairs of the other shall affect or be deemed to modify or waive any representation, warranty, covenant or agreement in this Agreement, or the conditions to either party’s obligation to consummate the transactions contemplated by this Agreement.

Section 5.07    Additional Financial Statements and Tax Returns. TBT will promptly furnish FFIN with true and complete copies of (a) each Bank Call Report prepared after the date of this Agreement as soon as such reports are made available to the FDIC, (b) each Tax Return for either TBT or the Bank prepared after the date of this Agreement as soon as such returns are made available to the IRS, (c) any the audited financial statements, as soon as each such audited financial statement is made available to TBT, and (d) unauditedmonth-end financial statements of TBT.

Section 5.08    Untrue Representations. TBT will promptly notify FFIN in writing if TBT or the Bank becomes aware of any fact or condition that makes untrue, or shows to have been untrue, in any material respect, any schedule or any other information furnished to FFIN or any representation or warranty made in or pursuant to this Agreement or that results in the failure of TBT or any of its Subsidiaries to comply with any covenant, condition or agreement contained in this Agreement.

Section 5.09    Litigation and Claims. TBT will promptly notify FFIN in writing of any litigation, or of any claim, controversy or contingent liability that might be expected to become the subject of litigation, against TBT or any of its Subsidiaries or affecting any of their properties, and TBT will promptly notify FFIN of any legal action, suit or proceeding or judicial, administrative or governmental investigation, pending or, to the Knowledge of TBT, threatened against TBT or any of its Subsidiaries that questions or might question the validity of this Agreement or the agreements contemplated hereby or any actions taken or to be taken by TBT or any of its Subsidiaries pursuant hereto or thereto or seeks to enjoin or otherwise restrain the transactions contemplated hereby or thereby.

Section 5.10    Material Adverse Changes. TBT will promptly notify FFIN in writing if any change or development has occurred or, to the Knowledge of TBT, been threatened (or any development has occurred or been threatened involving a prospective change) that (a) is reasonably likely to have, individually or in the aggregate, a Material Adverse Change on TBT or any of its Subsidiaries, (b) would adversely affect, prevent or delay the obtaining of any regulatory approval for the completion of the transactions contemplated by this Agreement, or (c) would cause the conditions inArticle VIII not to be satisfied.

Section 5.11    Consents and Approvals. TBT will use its commercially reasonable efforts to obtain at the earliest practicable time all consents and approvals from third parties, including those listed onConfidential Schedule 2.02(j).

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Section 5.12    Environmental Investigation; Right to Terminate Agreement.

(a)    FFIN and its consultants, agents and representatives will have the right, to the same extent that TBT has the right, if any, but not the obligation or responsibility, to inspect any Property, including conducting asbestos surveys and sampling, environmental assessments and investigations, and other environmental surveys and analyses including soil and ground sampling (“Environmental Inspections”) at any time on or prior to the date that is forty-five (45) days after the date of this Agreement. FFIN will notify TBT prior to any physical inspections of the Property, and TBT may place reasonable restrictions on the time of such inspections. If, as a result of any such Environmental Inspection, further investigation (“Secondary Investigation”) including, test borings, soil, water and other sampling is deemed desirable by FFIN, FFIN will (i) notify TBT of any Property for which it intends to conduct such a Secondary Investigation and the reasons for such Secondary Investigation, and (ii) commence such Secondary Investigation, on or prior to the date that is seventy-five (75) days after the date of this Agreement. FFIN will give reasonable notice to TBT of such Secondary Investigations, and TBT may place reasonable time and place restrictions on such Secondary Investigations.

(b)    FFIN will have the right to terminate this Agreement if (i) the factual substance of any warranty or representation set forth inSection 3.19 is not true and accurate in any material respect; (ii) the results of such Environmental Inspection, Secondary Investigation or other environmental survey are disapproved by FFIN because the Environmental Inspection, Secondary Investigation or other environmental survey identifies material violations or potential material violations of Environmental Laws; (iii) TBT has refused to allow FFIN to conduct an Environmental Inspection or Secondary Investigation in a manner that FFIN reasonably considers necessary; (iv) the Environmental Inspection, Secondary Investigation or other environmental survey identifies any past or present event, condition or circumstance that would or potentially would require remedial or cleanup action by TBT; (v) the Environmental Inspection, Secondary Investigation or other environmental survey identifies the presence of any underground or above ground storage tank in, on or under any Property that is not shown to be in compliance with all Environmental Laws applicable to the tank either now or at a future time certain, or that has had a release of petroleum or some other Hazardous Material that has not been cleaned up to the satisfaction of the relevant Governmental Entity or any other party with a legal right to compel cleanup; or (vi) the Environmental Inspection, Secondary Investigation or other environmental survey identifies the presence of any asbestos-containing material in, on or under any Property, the removal of which would result in a Material Adverse Change. On or prior to the date that is ninety (90) days after the date of this Agreement, FFIN will advise TBT in writing as to whether FFIN intends to terminate this Agreement in accordance withSection 9.01 because FFIN disapproves of the results of the Environmental Inspection, Secondary Investigation or other environmental survey. TBT will have the opportunity to correct any objected to violations or conditions to FFIN’s reasonable satisfaction prior to the date that is one hundred five (105) days after the date of this Agreement. If TBT fails to demonstrate its satisfactory correction of the violations or conditions to FFIN, FFIN may terminate this Agreement on or prior to the date that is one hundred five (105) days after the date of this Agreement.

(c)    TBT agrees to make available to FFIN and its consultants, agents and representatives all documents and other material relating to environmental conditions of any Property including the results of other Environmental Inspections and surveys. TBT also agrees that all engineers and consultants who prepared or furnished such reports may discuss such reports and information with FFIN and will be entitled to certify the same in favor of FFIN and its consultants, agents and representatives and make all other data available to FFIN and its consultants, agents and representatives.

Section 5.13    Registration Statement and Proxy Statement/Prospectus.

(a)    TBT agrees to cooperate and assist FFIN in (i) preparing a Registration Statement on FormS-4 (the “Registration Statement”), relating to the shares of FFIN Stock to be issued as part of the Merger Consideration provided for herein, and the Proxy Statement/Prospectus, and (ii) filing the Registration Statement and the Proxy Statement/Prospectus (forming a part of the Registration Statement) with the SEC,

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including furnishing to FFIN all information concerning TBT and each of its Subsidiaries that FFIN may reasonably request in connection with preparation of such Registration Statement and Proxy Statement/Prospectus. None of the information supplied or to be supplied by TBT or any of its directors, officers, employees or agents for inclusion in the Registration Statement or the Proxy Statement/Prospectus shall, at the date the Proxy Statement/Prospectus is mailed to the shareholders of TBT and, as the Registration Statement and the Proxy Statement/Prospectus may be amended or supplemented, at the time of the Shareholders’ Meeting, contain any untrue statement of a material fact or omit to state any material fact with respect to TBT necessary in order to make the statements therein with respect to TBT, in light of the circumstances under which they are made, not misleading or necessary to correct any statement in any earlier communication with respect to the solicitation of any proxy for the Shareholders’ Meeting. All documents that TBT is responsible for filing with any Regulatory Agency in connection with the Merger shall comply with respect to TBT in all material respects with the provisions of applicable Law.

(b)    The TBT Board has resolved to recommend to the TBT shareholders that they approve this Agreement, the Merger and the transactions contemplated herein and shall submit to its shareholders this Agreement and any other matters required to be approved by its shareholders in order to carry out the purposes of this Agreement.

(c)    If TBT becomes aware prior to the Effective Time of any information that would cause any of the statements in the Proxy Statement/Prospectus to be false or misleading with respect to any material fact, or to omit to state any material fact necessary to make the statements therein not false or misleading, TBT shall promptly inform FFIN thereof and take the necessary steps to correct the Proxy Statement/Prospectus.

Section 5.14    Benefit Plans.

(a)    TBT will take, and will cause each of its Subsidiaries to take, all action necessary to terminate the participation of TBT and its Subsidiaries in eachPEO-Sponsored Plan that is a Code §401(a) qualified retirement plan (each, a “PEO-Sponsored Retirement Plan”), each effective no later than the date immediately before the Closing Date. TBT will provide FFIN evidence or such other confirmation from TBT which FFIN deems appropriate that TBT and its Subsidiaries have terminated their participation in each suchPEO-Sponsored Retirement Plan as set forth in this paragraph pursuant to duly authorized corporate action. Any costs incurred prior to the Closing related to the termination of TBT’s and its Subsidiaries’ participation in eachPEO-Sponsored Retirement Plan (including all related legal, administrative and other costs and expenses unless specifically set forth otherwise in this subsection) shall be paid solely by TBT.

(b)    At the direction of FFIN, TBT will take, and will cause each of its Subsidiaries to take, all action necessary to terminate any TBT Employee Plan that is an employee welfare benefit plan, as defined in ERISA § 3(1) (“Welfare Plan”), effective not later than immediately before the Closing. TBT will provide FFIN evidence or such other confirmation from TBT which FFIN deems appropriate that each such Welfare Plan has been terminated as set forth in this paragraph pursuant to duly authorized corporate action. Notwithstanding the foregoing, without the consent of FFIN, TBT shall not take, or permit any of its Subsidiaries to take, any action to terminate any Welfare Plan that is a group medical plan.

(c)    TBT shall take all action necessary and appropriate to terminate the PEO Agreement effective prior to the Closing. Any costs incurred prior to the Closing related to the termination of the PEO Agreement (including all related legal, administrative and other costs and expenses unless specifically set forth otherwise in this subsection) shall be paid solely by TBT.

Section 5.15    Termination of Contracts. Each of TBT and the Bank will use its commercially reasonable efforts, including, but not limited to, notifying appropriate parties and negotiating in good faith a reasonable settlement, to ensure that its current data processing/technology contracts and other contracts listed onConfidential Schedule 5.15(a)will, if the Merger occurs, be terminated after the consummation of the Merger on a date and on terms agreed upon by FFIN’s written consent. Such notice and actions by TBT and the Bank will be in accordance with the terms of such data processing/technology contracts or other contracts.

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Section 5.16    Conforming Accounting Adjustments. TBT and each of its Subsidiaries shall, if requested by FFIN, consistent with GAAP, immediately prior to Closing, make such accounting entries as FFIN may reasonably request in order to conform the accounting records of TBT and each of its Subsidiaries to the accounting policies and practices of FFIN;provided, however, that no such adjustment shall (a) constitute or be deemed to be a breach, violation or failure to satisfy any representation, warranty, covenant, condition or other provision or constitute grounds for termination of this Agreement (except to the extent that a certain representation, warranty, covenant or other provision is breached and thus, requires the adjustment), (b) require any prior filing with any Governmental Entity, (c) violate any Law, rule or regulation applicable to TBT or any of its Subsidiaries, or (d) be an acknowledgment by TBT or any of its Subsidiaries (i) of any adverse circumstances for purposes of determining whether the conditions to FFIN’s obligations under this Agreement have been satisfied, or (ii) that such adjustment is required for purposes of determining satisfaction of the condition to FFIN’s obligations under this Agreement set forth inSection 8.07.

Section 5.17    Tail D&O Policy. On or prior to the Closing Date, TBT will obtain an extended reporting period (otherwise known as “Tail Coverage”) policy, with terms and coverage reasonable for such policies, covering directors and officers of TBT and the Bank for a period of not less than three (3) years from the Closing Date and such other insurance policies mutually agreed upon by TBT and FFIN.

Section 5.18    Regulatory and Other Approvals. TBT, at its own expense, will promptly file or cause to be filed applications for all regulatory approvals required to be obtained by TBT in connection with this Agreement and the other agreements contemplated hereby. TBT will promptly furnish FFIN with copies of all such regulatory filings and all correspondence for which confidential treatment has not been requested. TBT will use its commercially reasonable efforts to obtain all such regulatory approvals and any other approvals from third parties at the earliest practicable time.

Section 5.19    Tax Matters.

(a)    All transfer, documentary, sales, use, stamp, registration and other such Taxes and all conveyance fees, recording charges and other fees and charges (including any penalties and interest) incurred in connection with the consummation of the transactions contemplated by this Agreement, if any, shall be paid by the party liable for such Tax under Law when due, and such party will, at its own expense, file all necessary Tax Returns and other documentation with respect to all such Taxes, fees and charges, and, if required by applicable Law, the other party will, and will cause its Affiliates to, join in the execution of any such Tax Returns and other documentation.

(b)    TBT and its Subsidiaries shall comply with the recordkeeping and information reporting requirements imposed on them, including but not limited to those set forth in Treasury RegulationSection 1.368-3.

(c)    TBT and its Subsidiaries further agree, upon request, to use their commercially reasonable efforts to obtain any certificate or other document from any Governmental Entity or any other Person as may be necessary to mitigate, reduce or eliminate any Tax that could be imposed (including, but not limited to, with respect to the transactions contemplated hereby).

(d)    TBT and its Subsidiaries will not take any action or omit to take any action that would prevent or impede the Integrated Mergers taken together from qualifying as a reorganization described in Section 368(a) of the Code or satisfying the “continuity of business enterprise” requirement for a “reorganization” as provided in Treasury RegulationSection 1.368-1(d). TBT will comply, to the extent reasonably expected to be necessary to cause the Integrated Mergers taken together to qualify as a reorganization under the provisions of Section 368(a) of the Code, with all representations, warranties, and covenants contained in the TBT Tax Certificate.

(e)    In the event of any audit of TBT’s or its Subsidiaries’ federal or state Tax Returns (i) prior to the consummation of the Integrated Mergers, FFIN and TBT shall cooperate regarding any such audit and TBT shall not settle the same without the consent of FFIN, which consent will not be unreasonably withheld; and

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(ii) after the Effective Time, FFIN may settle any such audit in any matter that it determines is appropriate and shall pay all amounts due with respect to any such settlement.

Section 5.20    Tax-free Reorganization. Officers of TBT and its Subsidiaries shall execute and deliver to Norton Rose Fulbright US LLP and Fenimore Kay Harrison & Ford, LLP, respectively, certificates (the “TBT Certificate”) containing appropriate representations and covenants, reasonably satisfactory in form and substance to each counsel, at such time or times as may be reasonably requested by each counsel, including the Closing Date (and, if requested, as of the date on which the Registration Statement is declared effective by the SEC), in connection with each counsel’s deliveries of an opinion with respect to the Tax treatment of the Integrated Mergers pursuant toSection 8.17 andSection 7.10, and TBT shall also provide such other information as reasonably requested by each counsel for purposes of rendering the opinions described inSection 7.10 andSection 8.17.

Section 5.21    Disclosure Schedules. At least ten (10) days prior to the Closing, TBT agrees to provide FFIN with supplemental disclosure schedules to be delivered by TBT pursuant to this Agreement reflecting any material changes thereto between the date of this Agreement and the Closing Date. Delivery of such supplemental disclosure schedules shall not cure a breach or modify a representation or warranty of this Agreement.

Section 5.22    Transition.

(a)    The senior officers of TBT and the Bank agree to meet at a reasonable time with senior officers of FFIN as reasonably requested by FFIN to review the financial and operational affairs of the Bank, and to the extent permitted by applicable Law, each of TBT and the Bank agrees to give due consideration to FFIN’s input on such matters, consistent with thisSection 5.22, with the understanding that FFIN shall in no event be permitted to exercise control of TBT or the Bank prior to the Effective Time and, except as specifically provided under this Agreement, TBT and the Bank shall have no obligation to act in accordance with FFIN’s input. Commencing after the date hereof and to the extent permitted by applicable Law, FFIN, TBT and the Bank shall use their commercially reasonable efforts to plan the integration of TBT and the Bank with the businesses of FFIN and its Affiliates to be effective as much as practicable as of the Closing Date;provided,however, that in no event shall FFIN or its Affiliates be entitled to control TBT or the Bank prior to the Effective Time. Without limiting the generality of the foregoing, from the date hereof through the Effective Time and consistent with the performance of theirday-to-day operations and the continuous operation of TBT and the Bank in the ordinary course of business, TBT’s and the Bank’s employees and officers shall use their commercially reasonable efforts to provide support, including support from TBT’s and the Bank’s outside contractors, and to assist FFIN in performing all tasks, including, without limitation, equipment installation, reasonably required to result in a successful integration at the Closing. FFIN shall provide such assistance of its personnel as TBT and the Bank shall request to permit TBT and the Bank to comply with their obligations under thisSection 5.22.

(b)    From and after the date hereof, each of TBT and the Bank shall use its commercially reasonable efforts, and shall use its commercially reasonable efforts to cause its agents to, permit FFIN to take all reasonable actions that FFIN deems necessary or appropriate, and to cooperate and to use its commercially reasonable efforts to cause its agents to cooperate in the taking of such actions, to enable FFIN, after the Closing, to satisfy the applicable obligations under §§302, 404 and 906 of the Sarbanes-Oxley Act of 2002 (the “SOA”) and the other requirements of the SOA with respect to TBT and the Bank, including establishing and maintaining adequate disclosure controls and procedures and internal controls over financial reporting as such terms are defined in the SOA.

Section 5.23    Voting Agreement. Simultaneously with the execution of this Agreement, each of the executive officers and directors of TBT and the shareholders named on the signature pages thereto shall have executed and delivered to FFIN the Voting Agreement in the form attached hereto asExhibit“B”, and TBT acknowledges that pursuant to such agreement the directors of TBT have agreed that they will vote the shares of

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TBT Stock owned by them in favor of this Agreement and the transactions contemplated hereby and thereby, subject to required regulatory approvals.

Section 5.24    Director Support Agreements. Simultaneously with the execution of this Agreement, each of the directors of TBT set forth onConfidential Schedule 5.24 shall have executed and delivered to FFIN a Director Support Agreement with FFIN (each a “Director Support Agreement”) in the form attached hereto asExhibit“C”.

Section 5.25    Employment Agreement. Simultaneously with the execution of this Agreement, certain officers of TBT or the Bank shall have executed and delivered to FFIN an employment agreement in the forms attached hereto asExhibit“D” (the “Employment Agreement”) regarding such officers’ employment with the Bank following the consummation of the Merger.

Section 5.26    Execution of Releases. TBT shall take such action as it is required to, and shall use commercially reasonable efforts to cause each of its directors and the officers set forth onConfidential Schedule 8.06 to take such action as they are required to, in order to execute the releases in the forms attached hereto asExhibit“E” andExhibit“F”, respectively, as described inSection 8.06.

Section 5.27    No Solicitation. So long as this Agreement is in effect, neither TBT, the Bank nor any of their respective directors or officers shall (i) initiate, solicit, encourage or otherwise facilitate any inquiries, provide any information to or negotiate with any other party any proposal or offer that constitutes, or may reasonably be expected to lead to an Acquisition Proposal, (ii) enter into or maintain or continue discussions or negotiate with any Person in furtherance of such inquiries or to obtain an Acquisition Proposal, or (iii) agree to, approve, recommend, or endorse any Acquisition Proposal, or authorize or permit any of its or their directors or officers to take any such action and TBT or the Bank shall notify FFIN orally (within one (1) Business Day) and in writing (as promptly as practicable) of any such inquiries and proposals received by TBT or the Bank or any of its respective directors or officers, relating to any of such matters.

Section 5.28    TBT Option Vesting, Exercise and Cancellation. Notwithstanding anything to the contrary in the Amended and Restated and Restated 2006 Stock Option Plan for The Bank & Trust of Bryan/College Station, as amended by that certain amendment dated as of January 1, 2018 (as amended, the “TBT Stock Plans”), or in any individual option award agreement granted pursuant to the TBT Stock Plans that is outstanding as of the date of this Agreement (each a “TBT Option”), (a) no less than twenty (20) days prior to the Closing Date, the TBT Board (or, if appropriate, any committee administering the TBT Stock Plans) shall take all necessary actions to cause the vesting of any unvested TBT Options and TBT shall use its commercially reasonable efforts to cause all holders of TBT Options to exercise such TBT Options prior to the Closing Date; and (b) TBT shall terminate and cancel all TBT Options as of the Effective Time in accordance with the TBT Stock Plans and TBT Options and the holders of such TBT Options shall have no further rights or entitlements with respect thereto after the Effective Time.

Section 5.29    Repayment and Termination of Bank Stock Loan. Prior to or simultaneously with the Closing, TBT shall take all actions required to repay all indebtedness owed pursuant to that certain line of credit with The Bank and Trust, S.S.B. in accordance with the terms of such line of credit and cause any security interest, pledge, lien or other encumbrance on the Bank Stock to be removed, released and terminated.

Section 5.30    Warrant Exercise. Notwithstanding anything to the contrary in any warrant to purchase TBT Stock (the “TBT Warrants”), TBT shall use its commercially reasonable efforts to cause all holders of TBT Warrants to exercise such TBT Warrants prior to the Closing Date.

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ARTICLE VI

COVENANTS OF FFIN

Section 6.01    Commercially Reasonable Efforts. FFIN shall use its commercially reasonable efforts to perform and fulfill all conditions and obligations on its part to be performed or fulfilled under this Agreement and to cause the consummation of the transactions contemplated hereby in accordance with the terms and conditions of this Agreement.

Section 6.02    Regulatory Filings and Registration Statement.

(a)    FFIN, at its own expense, with the cooperation of TBT and the Bank, at their own expense, shall promptly file or cause to be filed applications for all regulatory approvals required to be obtained by FFIN in connection with this Agreement and the transactions contemplated hereby, including but not limited to the necessary applications for the prior approval of the Merger by the Federal Reserve and the OCC. FFIN will promptly provide TBT with copies of all such regulatory filings and all correspondence with regulatory authorities in connection with the Merger for which confidential treatment has not been requested.

(b)    FFIN shall reserve and make available for issuance in connection with the Merger, and in accordance with the terms of this Agreement, the shares of FFIN Stock for the Merger Consideration and shall, with the cooperation of TBT and the Bank, file with the SEC the Registration Statement, which Registration Statement will contain the Proxy Statement/Prospectus, and FFIN shall use its commercially reasonable efforts to cause the Registration Statement to become effective. At the time the Registration Statement becomes effective, the Registration Statement shall comply in all material respects with the provisions of the Securities Act and the published rules and regulations thereunder, and shall not contain (and none of the information supplied or to be supplied by FFIN or any of its directors, officers, employees or agents for inclusion in the Registration Statement or the Proxy Statement/Prospectus shall contain) any untrue statement of material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not false or misleading, and at the time of the mailing thereof to the TBT shareholders at the time of the Shareholders’ Meeting and on the Effective Time, the Proxy Statement/Prospectus included as part of the Registration Statement, as amended or supplemented by any amendment or supplement, shall not contain any untrue statement of a material fact or omit to state any material fact necessary to make the statements therein not false or misleading. If at any time prior to the Effective Time any event is discovered by FFIN which is required to be set forth in an amendment or supplement to the Registration Statement or the Proxy Statement/Prospectus, FFIN shall promptly so inform TBT.

(c)    FFIN shall timely file all documents required to obtain all necessary Blue Sky permits and approvals, if any, required to carry out the transactions contemplated by this Agreement, shall pay all expenses incident thereto and shall use its commercially reasonable efforts to obtain such permits and approvals on a timely basis.

(d)    FFIN shall promptly and properly prepare and file any filings required under the Securities Act or Exchange Act, relating to the Merger and the transactions contemplated herein.

(e)    FFIN shall keep TBT reasonably informed as to the status of such applications and filings and shall notify it promptly of any developments that reasonably could significantly delay the completion of the Merger.

Section 6.03    Untrue Representations. FFIN shall promptly notify TBT in writing if FFIN becomes aware of any fact or condition that makes untrue, or shows to have been untrue, in any material respect, any schedule or any other information furnished to TBT or any representation or warranty made in or pursuant to this Agreement or that results in the failure of FFIN to comply with any covenant, condition or agreement contained in this Agreement.

Section 6.04    Litigation and Claims. FFIN shall promptly notify TBT of any legal action, suit or proceeding or judicial, administrative or governmental investigation, pending or, to the Knowledge of FFIN,

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threatened against FFIN or any Subsidiary of FFIN that questions or might question the validity of this Agreement or the agreements contemplated hereby, or any actions taken or to be taken by FFIN or any Subsidiary of FFIN pursuant hereto or thereto or seeks to enjoin or otherwise restrain the transactions contemplated hereby or thereby.

Section 6.05    Material Adverse Changes. FFIN shall promptly notify TBT in writing if any change or development shall have occurred or, to the Knowledge of FFIN, been threatened (or any development shall have occurred or been threatened involving a prospective change) that (a) is reasonably likely to have, individually or in the aggregate, a Material Adverse Change on FFIN, (b) would adversely affect, prevent or delay the obtaining of any regulatory approval for the consummation of the transactions contemplated by this Agreement, or (c) would cause the conditions inArticle VII not to be satisfied.

Section 6.06    Consents and Approvals. FFIN shall use its commercially reasonable efforts to obtain at the earliest practicable time all consents and approvals from third parties, including those listed onConfidential Schedule 2.03(g) necessary to consummate the transactions contemplated by this Agreement at the earliest practicable time.

Section 6.07    Employee Matters.

(a)    FFIN shall, with respect to each employee of TBT and the Bank at the Effective Time who continues in employment with FFIN or its Subsidiaries (each a “Continued Employee”), provide the benefits described in thisSection 6.07. Subject to the right of subsequent amendment, modification, replacement or termination in the sole discretion of FFIN, each Continued Employee shall be entitled, as an employee of FFIN or its Subsidiaries, to participate in the employee benefit plans of FFIN as set forth inConfidential Schedule 6.07(a) hereto in effect as of the date of this Agreement, if such Continued Employee shall be eligible and, if required, selected for participation therein under the terms thereof and makes any required contributions. All such participation shall be subject to such terms of such plans as may be in effect from time to time and thisSection 6.07 is not intended to give any Continued Employee any rights or privileges superior to those of other similarly situated employees of FFIN or its Subsidiaries. The provisions of thisSection 6.07 shall not be deemed or construed so as to provide duplication of similar benefits but, subject to that qualification, FFIN shall, solely for purposes of vesting (but not benefit accrual) and any age or period of service requirements for commencement of participation with respect to any employee benefit plans in which a Continued Employee may participate (excluding any defined benefit pension plan), credit each Continued Employee with his or her term of service with TBT or the Bank (and its predecessor, Texas Enterprise Bank) to the extent such service was recognized under the substantially analogous TBT Employee Plan.

(b)    To the extent permitted by the applicable employee benefit plans of FFIN and applicable Law, FFIN shall take commercially reasonable steps to cause any eligibility waiting period andpre-existing condition exclusion applicable to such plans and programs to be waived with respect to each Continued Employee and their eligible dependents.

(c)    To the extent permitted by the applicable employee benefit plans of FFIN and applicable Law, FFIN further agrees to take commercially reasonable steps to credit each Continued Employee and his or her eligible dependents for the year during which coverage under FFIN’s group health plan begins, with any deductibles,co-pays orout-of-pocket payments already incurred by such Continued Employee during such year under TBT’s group health plan.

(d)    Each Continued Employee shall be permitted to rollover and receive credit under FFIN’s policies regarding sick leave for accrued but unused paid sick leave as of the Closing Date, up to a maximum amount permitted under such FFIN policies.

(e)    The survivor income arrangements identified onConfidential Schedule 6.07(e) in effect immediately prior to the Closing Date shall survive Closing and the Continued Employees who are parties thereto shall remain entitled to receive the benefits thereunder in accordance with the terms thereof, and FFB shall assume and fulfill the obligations of the Bank thereunder as successor to the Bank under the Bank Merger.

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Section 6.08    Conduct of Business in the Ordinary Course. Except as specifically provided for in this Agreement, FFIN shall conduct its business in the ordinary course as heretofore conducted. For purposes of thisSection 6.08, the ordinary course of business shall consist of the banking and related business as presently conducted by FFIN and its Subsidiaries, and engaging in acquisitions and assisting in the management of its Subsidiaries.

Section 6.09    Disclosure Schedules. At least ten (10) days prior to the Closing, FFIN agrees to provide TBT with supplemental disclosure schedules to be delivered by FFIN pursuant to this Agreement reflecting any material changes thereto between the date of this Agreement and the Closing Date. Delivery of such supplemental disclosure schedules shall not cure a breach or modify a representation or warranty of this Agreement.

Section 6.10    No Control of Other Party’s Business. Nothing contained in this Agreement (includingSections 5.04,5.05 and5.06) shall give FFIN, directly or indirectly, the right to control or direct the operations of TBT prior to the Effective Time or shall give TBT, directly or indirectly, the right to control or direct the operations of FFIN. Prior to the Effective Time, (a) each of TBT and FFIN shall exercise, consistent with the terms and conditions of this Agreement, complete control and supervision over its and its Subsidiaries’ respective operations, (b) TBT shall not be under any obligation to act in a manner that could reasonably be deemed to constitute anti-competitive behavior under federal or state antitrust Laws, and (c) TBT shall not be required to agree to any material obligation that is not contingent upon the consummation of the Merger.

Section 6.11    Nasdaq Listing. FFIN shall file all documents required to be filed to have the shares of FFIN Stock to be issued pursuant to this Agreement included for listing on the Nasdaq Global Select Market and use its commercially reasonable efforts to effect said listing.

Section 6.12    Indemnification.

(a)    For a three (3) year period after the Effective Time, and subject to the limitations contained in applicable Federal Reserve, OCC and FDIC regulations and to any limitations contained in the TBT Constituent Documents, FFIN will indemnify, defend and hold harmless (and advance expenses to) each present director and officer of TBT or the Bank, determined as of the Effective Time (the “Indemnified Parties”), against any costs or expenses (including reasonable attorneys’ fees), judgments, fines, losses, claims, damages or liabilities incurred in connection with any claim, action, suit, proceeding or investigation, whether civil, criminal, administrative or investigative, arising out of matters existing or occurring at or before the Effective Time, whether asserted or claimed before, at or after the Effective Time, arising in whole or in part out of or pertaining to the fact that he or she was acting in his or her capacity as a director or officer of the TBT or the Bank to the fullest extent that the Indemnified Party would be entitled under the TBT Constituent Documents, as applicable, in each case as in effect on the date hereof and to the extent permitted by applicable Law.

(b)    Any Indemnified Party wishing to claim indemnification under thisSection 6.12, upon learning of any such claim, action, suit, proceeding or investigation, is to promptly notify FFIN, but the failure to so notify will not relieve FFIN of any liability it may have to the Indemnified Party to the extent such failure does not prejudice FFIN. In any such claim, action, suit, proceeding or investigation (whether arising before or after the Effective Time), (i) FFIN will have the right to assume the defense thereof and FFIN will not be liable to an Indemnified Party for any legal expenses of other counsel or any other expenses subsequently incurred by an Indemnified Party in connection with the defense thereof, except that if FFIN elects not to assume such defense or counsel for the Indemnified Party is of the opinion that there are issues which raise conflicts of interest between FFIN and the Indemnified Party, the Indemnified Party may retain counsel reasonably satisfactory to FFIN, and FFIN will pay the reasonable fees and expenses of such counsel for the Indemnified Party (which may not exceed one firm in any jurisdiction), (ii) the Indemnified Party will cooperate in the defense of any such matter, (iii) FFIN will not be liable for any settlement effected without its prior written consent, and (iv) FFIN will have no obligation hereunder if indemnification of an Indemnified Party in the manner contemplated hereby is prohibited by applicable Laws and regulations.

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Section 6.13    Tax Matters. Following the Closing:

(a)    FFIN shall prepare, or cause to be prepared, and file, or caused to be filed, all Tax Returns for TBT that are to be filed after the Closing and shall pay all Taxes with respect to such Tax Returns.

(b)    FFIN and its counsel shall control any audit of TBT’s federal or state Tax Returns for any taxable period whether before or after the Closing Date, and FFIN may settle any such audit in any matter that it determines is appropriate and shall pay all amounts due with respect to any such settlement.

(c)    FFIN shall comply with the recordkeeping and information reporting requirements set forth in Treasury RegulationSection 1.368-3.

(d)    FFIN will not take any action or omit to take any action that would prevent or impede the Integrated Mergers taken together from qualifying as a reorganization described in Section 368(a) of the Code or satisfying the “continuity of business enterprise” requirement for a “reorganization” as provided in Treasury RegulationSection 1.368-1(d). FFIN will comply, to the extent reasonably expected to be necessary to cause the Integrated Mergers taken together to qualify as a reorganization under the provisions of Section 368(a) of the Code, with all representations, warranties, and covenants contained in the FFIN Certificate.

Section 6.14    Tax-free Reorganization. Officers of FFIN and Merger Sub shall execute and deliver to Norton Rose Fulbright US LLP and Fenimore Kay Harrison & Ford, LLP, respectively, certificates (the “FFIN Certificate”) containing appropriate representations and covenants, reasonably satisfactory in form and substance to each counsel, at such time or times as may be reasonably requested by each counsel, including the Closing Date (and, if requested, as of the date on which the Registration Statement is declared effective by the SEC), in connection with each counsel’s delivery of an opinion with respect to the Tax treatment of the Integrated Mergers pursuant toSection 7.10 andSection 8.17, and FFIN shall also provide such other information as reasonably requested by each counsel for purposes of rendering the opinions described inSection 7.10 andSection 8.17.

Section 6.15    Access;Pre-Closing Investigation. Upon reasonable notice and subject to applicable Laws, FFIN will afford the officers, directors, employees, attorneys, accountants, investment bankers and authorized representatives of TBT full access (excluding any information that is prohibited from being disclosed by applicable Law) during normal business hours to the properties, books, contracts and records of FFIN and each of its Subsidiaries as TBT may reasonably require and furnish to TBT during such period all such information concerning FFIN, each of its Subsidiaries and its affairs as TBT may reasonably request, in order that TBT may have full opportunity to make such reasonable investigation as it desires to make of the affairs of FFIN and each of its Subsidiaries, including access sufficient to verify the satisfaction of the conditions precedent to TBT’s obligations described in Article VII of this Agreement. TBT will use its commercially reasonable efforts not to disrupt the normal business operations of FFIN or any of its Subsidiaries. FFIN agrees at any time, and from time to time, to furnish to TBT as soon as practicable, any additional information that TBT may reasonably request. Neither FFIN nor any of its Subsidiaries shall be required to provide access to or to disclose information where such access or disclosure would violate or prejudice the rights of FFIN’s or any of its Subsidiaries’ customers, jeopardize the attorney-client privilege of the institution in possession or control of such information (after giving due consideration to the existence of any common interest, joint defense or similar agreement between the parties) or contravene any Law, rule, regulation, Order, judgment, decree, fiduciary duty or binding agreement entered into prior to the date of this Agreement. No investigation by either party of the business and affairs of the other shall affect or be deemed to modify or waive any representation, warranty, covenant or agreement in this Agreement, or the conditions to either party’s obligation to consummate the transactions contemplated by this Agreement.

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ARTICLE VII

CONDITIONS PRECEDENT TO THE OBLIGATIONS OF TBT

The obligations of TBT under this Agreement are subject to the satisfaction, prior to or at the Closing, of each of the following conditions, which may be waived in whole or in part by TBT:

Section 7.01    Representations and Warranties. (i) Each of the representations and warranties of the FFIN set forth inSections 4.01,4.02, and4.03 (other than inaccuracies that are de minimis in amount and effect) shall be true and correct in all respects as of the date of this Agreement and as of the Closing Date as though made as of Closing Date (unless any such representation or warranty is made only as of a specific date, in which case as of such specific date), and (ii) each of the other representations and warranties made by FFIN in this Agreement or in any document or schedule delivered to TBT in connection with this Agreement shall be true and correct in all material respects (except to the extent such representations and warranties are qualified by their terms by reference to “material,” “materiality,” “in all material respects,” “Material Adverse Change,” or the like, in which case such representations and warranties as so qualified are true and correct in all respects) as of the date of this Agreement and as of the Closing Date as though made as of Closing Date (unless any such representation or warranty is made only as of a specific date, in which case as of such specific date).

Section 7.02    Performance of Obligations. FFIN and Merger Sub have, or have caused to be, performed or observed, in all material respects, all obligations and agreements required to be performed or observed by FFIN and Merger Sub under this Agreement on or prior to the Closing Date.

Section 7.03    Shareholder Approvals. The TBT Shareholder Approval having occurred.

Section 7.04    Government and Other Approvals. TBT and FFIN having received approvals, acquiescences or consents of the transactions contemplated by this Agreement from all necessary Governmental Entities and from the third parties listed onConfidential Schedules 2.02(j) and2.03(g), respectively, and all applicable waiting periods having expired. Further, the approvals and the transactions contemplated hereby not having been contested or threatened to be contested by any federal or state Governmental Entity or by any other third party by formal proceedings.

Section 7.05    No Litigation. No action having been taken, and no statute, rule, regulation or Order being promulgated, enacted, entered, enforced or deemed applicable to this Agreement or the transactions contemplated hereby by any federal, state or foreign government or Governmental Entity or by any court, including the entry of a preliminary or permanent injunction, which, if successful, would (a) make this Agreement or any other agreement contemplated hereby, or the transactions contemplated hereby or thereby illegal, invalid or unenforceable, (b) impose material limits on the ability of any party to this Agreement to complete this Agreement or any other agreement contemplated hereby, or the transactions contemplated hereby or thereby, or (c) if this Agreement or any other agreement contemplated hereby, or the transactions contemplated hereby or thereby are completed, subject TBT or any officer, director, shareholder or employee of TBT to criminal or civil liability. Further, no action or proceeding before any court or Governmental Entity, by any government or Governmental Entity or by any other Person is threatened, instituted or pending that would reasonably be expected to result in any of the consequences referred to in clauses (a) through (c) above.

Section 7.06    Delivery of Closing Documents. TBT shall have received all documents required to be received from FFIN on or prior to the Closing Date as set forth inSection 2.03 hereof, all in form and substance reasonably satisfactory to TBT.

Section 7.07    No Material Adverse Change. There having been no Material Adverse Change with respect to FFIN since the date of this Agreement.

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Section 7.08    Registration Statement. The Registration Statement, including any amendments or supplements thereto, shall be effective under the Securities Act and no stop order suspending the effectiveness of the Registration Statement shall be in effect or proceedings for such purpose pending before or threatened by the SEC. All state securities permits or approvals required by applicable state securities Laws to consummate the transactions contemplated by this Agreement shall have been received and remain in effect.

Section 7.09    Nasdaq Listing. The shares of FFIN Stock to be issued pursuant to this Agreement shall have been approved for listing on the Nasdaq Global Select Market.

Section 7.10    Federal Tax Opinion. TBT shall have received an opinion of Fenimore Kay Harrison & Ford, LLP, in form and substance reasonably satisfactory to TBT, dated as of the Closing Date (and, if requested, dated as of the date on which the Registration Statement is declared effective by the SEC), and based on facts, representations and assumptions described in such opinion, to the effect that the Integrated Mergers will together be treated as an integrated transaction that qualifies as a “reorganization” within the meaning of Section 368(a) of the Code. In rendering such opinion, Fenimore Kay Harrison & Ford, LLP may require and rely upon and may incorporate by reference representations and covenants, including those contained in TBT Certificate and FFIN Certificate referred to inSection 5.20 andSection 6.14, respectively, and such other information reasonably requested by and provided to it by TBT or FFIN for purposes of rendering such opinion.

ARTICLE VIII

CONDITIONS PRECEDENT TO THE OBLIGATIONS OF FFIN AND MERGER SUB

All obligations of FFIN and Merger Sub under this Agreement are subject to the satisfaction, prior to or at the Closing, of each of the following conditions, which may be waived in whole or in part by such parties.

Section 8.01    Representations and Warranties. (i) Each of the representations and warranties of the TBT set forth inSections 3.01,3.02,3.03 (other than inaccuracies that are de minimis in amount and effect) and3.14 and3.41 shall be true and correct in all respects as of the date of this Agreement and as of the Closing Date as though made as of Closing Date (unless any such representation or warranty is made only as of a specific date, in which case as of such specific date), and (ii) each of the other representations and warranties made by TBT in this Agreement or in any document or schedule delivered to FFIN in connection with this Agreement shall be true and correct in all material respects (except to the extent such representations and warranties are qualified by their terms by reference to “material,” “materiality,” “in all material respects,” “Material Adverse Change,” or the like, in which case such representations and warranties as so qualified are true and correct in all respects) as of the date of this Agreement and as of the Closing Date as though made as of Closing Date (unless any such representation or warranty is made only as of a specific date, in which case as of such specific date).

Section 8.02    Performance of Obligations. TBT has, or has caused to be, performed or observed, in all material respects, all obligations and agreements required to be performed or observed by TBT under this Agreement on or prior to the Closing Date.

Section 8.03    Shareholder Approval. The TBT Shareholder Approval having occurred.

Section 8.04    Government and Other Approvals. TBT and FFIN having received approvals, acquiescences or consents of the transactions contemplated by this Agreement from all necessary Governmental Entities and from the third parties listed onConfidential Schedules 2.02(j) and2.03(g), respectively, and all applicable waiting periods having expired. Further, the approvals and the transactions contemplated hereby not having been contested or threatened to be contested by any federal or state Governmental Entity or by any other third party by formal proceedings.

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Section 8.05    No Litigation. No action having been taken, and no statute, rule, regulation or Order being promulgated, enacted, entered, enforced or deemed applicable to this Agreement or the transactions contemplated hereby by any federal, state or foreign government or Governmental Entity or by any court, including the entry of a preliminary or permanent injunction, which, if successful, would (a) make this Agreement or any other agreement contemplated hereby, or the transactions contemplated hereby or thereby illegal, invalid or unenforceable, (b) require the divestiture of a material portion of the assets of FFIN or its Subsidiaries, (c) impose material limits on the ability of any party to this Agreement to complete this Agreement or any other agreement contemplated hereby, or the transactions contemplated hereby or thereby, or (d) if this Agreement or any other agreement contemplated hereby, or the transactions contemplated hereby or thereby are completed, subject FFIN or any officer, director, shareholder or employee of FFIN to criminal or civil liability. Further, no action or proceeding before any court or Governmental Entity, by any government or Governmental Entity or by any other Person is threatened, instituted or pending that would reasonably be expected to result in any of the consequences referred to in clauses (a) through (d) above.

Section 8.06    Releases. FFIN having received from each of the directors of TBT an instrument dated as of the Closing Date releasing TBT, its Subsidiaries and each of its Affiliates, successors and assigns, from any and all claims of such directors (except to certain matters described therein), the form of which is attached asExhibit “E”. Further, FFIN having received from each of the officers of TBT, as listed onConfidential Schedule 8.06, an instrument dated as of the Closing Date releasing TBT, its Subsidiaries and each of its Affiliates, successors and assigns, from any and all claims of such executive officers (except as to certain matters described therein), the form of which is attached asExhibit“F”.

Section 8.07    No Material Adverse Change. There will have been no Material Adverse Change with respect to TBT since the date of this Agreement.

Section 8.08    Termination of Employee Plans. FFIN having received evidence reasonably satisfactory to FFIN that, as of the Effective Time, all Employee Plans of TBT (other than such plans FFIN elects not to terminate) have been terminated in accordance with the terms of such Employee Plans of TBT, the Code, ERISA and all other applicable Laws on a basis satisfactory to FFIN in its reasonable discretion and that, to the extent required by the Employee Plans or applicable Law, affected participants have been notified of such terminations and/or integrations.

Section 8.09    Voting Agreements. Each of the Voting Agreements shall be in full force and effect and the shareholder that is party thereto shall not be in material breach of such Voting Agreement.

Section 8.10    Director Support Agreements. Each of the Director Support Agreements shall be in full force and effect and the director that is party thereto shall not be in material breach of such Director Support Agreements.

Section 8.11    Employment Agreements. Each of the Employment Agreements shall be in full force and effect and the officer that is party thereto shall not be in material breach of such Employment Agreement.

Section 8.12    Registration Statement. The Registration Statement, including any amendments or supplements thereto, shall be effective under the Securities Act and no stop order suspending the effectiveness of the Registration Statement shall be in effect or proceedings for such purpose pending before or threatened by the SEC. All state securities permits or approvals required by applicable state securities Laws to consummate the transactions contemplated by this Agreement shall have been received and remain in effect.

Section 8.13    Dissenting Shareholders. Holders of not more than 5% of the outstanding shares of TBT Stock having demanded or be entitled to demand payment of the fair value of their shares as dissenting shareholders under applicable provisions of the TBOC.

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Section 8.14    Delivery of Closing Documents. FFIN shall have received all documents required to be received from TBT on or prior to the Closing Date as set forth inSection 2.02 hereof, all in form and substance reasonably satisfactory to FFIN.

Section 8.15    TBT Options. Each holder of a TBT Option shall have exercised (or elected to not exercise) such TBT Option prior to the Closing Date and TBT shall have terminated and cancelled all TBT Options as of the Closing Date.

Section 8.16    FIRPTA Certificate. TBT shall have delivered to FFIN (i) a notice to the IRS conforming to the requirements of Treasury RegulationSection 1.897-2(h)(2), in form and substance satisfactory to FFIN, dated as of the Closing Date and executed by TBT, and (ii) a Statement ofNon-U.S. Real Property Holding Corporation Status pursuant to Treasury Regulation Sections1.1445-2(c)(3) and1.897-2(h) in form and substance satisfactory to FFIN, dated as of the Closing Date and executed by TBT.

Section 8.17    Federal Tax Opinion. FFIN shall have received an opinion of Norton Rose Fulbright US LLP, in form and substance reasonably satisfactory to FFIN, dated as of the Closing Date (and, if requested, dated as of the date on which the Registration Statement is declared effective by the SEC), and based on facts, representations and assumptions described in such opinion, to the effect that the Integrated Mergers will together be treated as an integrated transaction that qualifies as a “reorganization” within the meaning of Section 368(a) of the Code. In rendering such opinion, Norton Rose Fulbright US LLP may require and rely upon and may incorporate by reference representations and covenants, including those contained in TBT Certificate and FFIN Certificate referred to inSection 5.20 andSection 6.14, respectively, and such other information reasonably requested by and provided to it by TBT or FFIN for purposes of rendering such opinion.

Section 8.18    Repayment and Termination of Bank Stock Loan. Prior to or simultaneously with the Closing, TBT shall have taken all actions required to repay all indebtedness owed pursuant to that certain line of credit with The Bank and Trust, S.S.B. in accordance with the terms of such line of credit and any security interest, pledge, lien or other encumbrance on the Bank Stock shall have been removed, released and terminated.

Section 8.19    TBT Warrants. Each holder of a TBT Warrant shall have exercised (or elected to not exercise in which case such TBT Warrant shall be cancelled) such TBT Warrant prior to the Closing Date.

ARTICLE IX

TERMINATION

Section 9.01    Right of Termination. This Agreement and the transactions contemplated hereby may be terminated at any time, notwithstanding the approval thereof by the shareholders of TBT, prior to or at the Closing as follows, and in no other manner:

(a)    By the mutual written consent of FFIN and TBT, duly authorized by the board of directors of each of FFIN and TBT;

(b)    By either TBT or FFIN (as long as the terminating party is not in material breach of any representation, warranty, covenant or other agreement contained herein) if the conditions precedent to such parties’ obligations to close specified inArticle VII andArticle VIII, respectively, hereof have not been met or waived by May 15, 2020, or such later date as has been approved by the parties hereto;

(c)    By either FFIN or TBT if any of the transactions contemplated by this Agreement are disapproved by any Regulatory Agency whose approval is required to complete such transactions or if any court of competent jurisdiction in the United States or other federal or state Governmental Entity has issued an Order, decree or ruling or taken any other action restraining, enjoining, invalidating or otherwise prohibiting

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this Agreement or the transactions contemplated hereby and such disapproval, Order, decree, ruling or other action is final and nonappealable;provided,however, that the party seeking to terminate this Agreement pursuant to thisSection 9.01(c) shall have used its commercially reasonable efforts to contest, appeal and remove such Order, decree, ruling or other action;

(d)    By either FFIN or TBT if it reasonably determines, in good faith and after consulting with counsel, there is substantial likelihood that any necessary regulatory approval will not be obtained or will be obtained only upon a condition or conditions that could reasonably be expected to be materially burdensome on, or materially impair the anticipated benefits of the Merger to, FFIN and its Subsidiaries and Affiliates, taken as a whole;

(e)    by either FFIN or TBT if there has been any Material Adverse Change with respect to the other party;

(f)    by FFIN, if there shall have been a breach of any of the covenants or agreements or any of the representations or warranties (or any such representation or warranty shall cease to be true and correct) set forth in this Agreement on the part of TBT or any other agreement contemplated hereby, which breach or failure to be true and correct, either individually or in the aggregate with all other breaches (or failures of such representations and warranties to be true and correct), would constitute, if occurring or continuing on the Closing Date, the failure of the conditions set forth inSection 8.01 orSection 8.02, as the case may be; provided, that the right to terminate this Agreement under thisSection 9.01(f) shall not be available to FFIN if it or Merger Sub is then in material breach of any of its representations, warranties, covenants or agreements set forth in this Agreement. If FFIN desires to terminate this Agreement because of an alleged breach or failure to be true and correct as provided in thisSection 9.01(f), then it must notify TBT in writing of its intent to terminate stating the reason therefor. TBT shall have thirty (30) days from the receipt of such notice to cure the alleged breach or failure to be true and correct, if the breach or failure to be true and correct is capable of being cured;

(g)    by TBT, if there shall have been a breach of any of the covenants or agreements or any of the representations or warranties (or any such representation or warranty shall cease to be true and correct) set forth in this Agreement on the part of FFIN or Merger Sub or any other agreement contemplated hereby, which breach or failure to be true and correct, either individually or in the aggregate with all other breaches (or failures of such representations and warranties to be true and correct), would constitute, if occurring or continuing on the Closing Date, the failure of the conditions set forth inSection 7.01 orSection 7.02, as the case may be; provided, that the right to terminate this Agreement under thisSection 9.01(g) shall not be available to TBT if it is then in material breach of any of its representations, warranties, covenants or agreements set forth in this Agreement. If TBT desires to terminate this Agreement because of an alleged breach or failure to be true and correct as provided in thisSection 9.01(g), then it must notify FFIN in writing of its intent to terminate stating the reason therefor. FFIN shall have thirty (30) days from the receipt of such notice to cure the alleged breach or failure to be true and correct, if the breach or failure to be true and correct is capable of being cured;

(h)    By FFIN or TBT, if the TBT Shareholder Approval has not occurred at the Shareholders’ Meeting; provided, that TBT may only terminate this Agreement pursuant to thisSection 9.01(h) if the TBT Board recommended that the shareholders of TBT vote in favor of the approval and adoption of this Agreement and the Merger;

(i)    By FFIN in accordance withSection 5.12;

(j)    By FFIN if TBT or the Bank enter into any formal or informal administrative action with a Governmental Entity or any such action is threatened by a Governmental Entity; or

(k)    By FFIN, if (i) TBT has mailed the Proxy Statement/Prospectus to its shareholders and TBT does not hold the Shareholders’ Meeting within sixty (60) days thereafter, (ii) the TBT Board fails to recommend that the TBT shareholders vote in favor of approval of this Agreement, or (iii) the individuals that executed a Voting Agreement or a Director Support Agreement pursuant toSection 5.23 andSection 5.24 hereto have violated the terms thereof.

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Section 9.02    Notice of Termination. The power of termination provided for inSection 9.01 hereof may be exercised only by a notice given in writing, as provided inSection 10.08 of this Agreement.

Section 9.03    Effect of Termination. Without limiting any other relief to which either party hereto may be entitled for breach of this Agreement or fraud, if this Agreement is terminated pursuant to the provisions ofSection 9.01 hereof, no party to this Agreement will have any further liability or obligation under this Agreement.

ARTICLE X

MISCELLANEOUS

Section 10.01    Survival of Representations, Warranties, Covenants and Agreements. The representations, warranties, covenants and agreements of TBT, FFIN, and Merger Sub contained in this Agreement shall terminate at the Closing, other than the covenants that by their terms are to be performed after the Effective Time, which shall survive the Closing.

Section 10.02    Expenses. Each of the parties to this Agreement is obligated to pay all of its expenses and costs (including all counsel fees and expenses) incurred by it in connection with this Agreement and the consummation of the transactions contemplated hereby.

Section 10.03    Brokerage Fees and Commissions.

(a)    FFIN hereby represents to TBT that, except as set forth inConfidential Schedule 10.03(a), no agent, representative or broker has represented FFIN in connection with the transactions described in this Agreement. TBT will not have any responsibility or liability for any fees, expenses or commissions payable to any agent, representative or broker of FFIN and FFIN hereby agrees to indemnify and hold TBT harmless for any amounts owed to any agent, representative or broker of FFIN.

(b)    TBT hereby represents to FFIN that, except as set forth inConfidential Schedule 10.03(b), no agent, representative or broker has represented TBT in connection with the transactions described in this Agreement. FFIN will not have any responsibility or liability for any fees, expenses or commissions payable to any agent, representative or broker of TBT or any shareholder of TBT, and TBT hereby agrees to indemnify and hold FFIN harmless for any amounts owed to any agent, representative or broker of TBT or any shareholder of TBT.

Section 10.04    Entire Agreement. This Agreement, the Voting Agreement, the Director Support Agreements, and the other agreements, documents, schedules and instruments signed and delivered by the parties to each other at the Closing are the full understanding of the parties, a complete allocation of risks between them and a complete and exclusive statement of the terms and conditions of their agreement relating to the subject matter hereof and supersede any and all prior agreements, whether written or oral, that may exist between the parties with respect thereto. Except as otherwise specifically provided in this Agreement, no conditions, usage of trade, course of dealing or performance, understanding or agreement purporting to modify, vary, explain or supplement the terms or conditions of this Agreement is binding unless hereafter made in writing and signed by the party to be bound, and no modification will be effected by the acknowledgment or acceptance of documents containing terms or conditions at variance with or in addition to those set forth in this Agreement.

Section 10.05    Binding Effect; Assignment. All of the terms, covenants, representations, warranties and conditions of this Agreement are binding upon, and inure to the benefit of and are enforceable by, the parties and their respective successors, representatives and permitted assigns. No party to this Agreement may assign this Agreement, by operation of law or otherwise, in whole or in part, without the prior written consent of the other parties, and any assignment made or attempted in violation of this Section is void and of no effect.

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Section 10.06    Further Cooperation. The parties agree that they will, at any time and from time to time after the Closing, upon request by the other and without further consideration, do, perform, execute, acknowledge and deliver all such further acts, deeds, assignments, assumptions, transfers, conveyances, powers of attorney, certificates and assurances as may be reasonably required in order to complete the transactions contemplated by this Agreement or to carry out and perform any undertaking made by the parties hereunder.

Section 10.07    Severability. Whenever possible, each provision or portion of any provision of this Agreement shall be interpreted in such manner as to be effective and valid under applicable Law, but if any provision of this Agreement is held to be illegal, invalid or unenforceable under present or future Laws, then the remaining provisions of this Agreement will remain in full force and effect and will not be affected by such illegal, invalid or unenforceable provision or by its severance from this Agreement; and this Agreement shall be reformed, construed and enforced in such jurisdiction such that the illegal, invalid or unenforceable provision or portion thereof shall be interpreted to be only so broad as is enforceable.

Section 10.08    Notices. Any and all payments (other than payments at the Closing), notices, requests, instructions and other communications required or permitted to be given under this Agreement after the date of this Agreement by any party hereto to any other party may be delivered personally or by nationally recognized overnight courier service or sent by U.S. mail or (except in the case of payments) by facsimile transmission or electronic mail (provided that the electronic mail is promptly confirmed by telephone and is followed up within one Business Day by dispatch pursuant to one of the other methods described herein), at the respective addresses or transmission numbers set forth below and is deemed delivered (a) in the case of personal delivery, facsimile transmission or electronic mail, when received; (b) in the case of mail, upon the earlier of actual receipt or five (5) Business Days after deposit in the United States Postal Service, first class certified or registered mail, postage prepaid, return receipt requested; and (c) in the case of an overnight courier service, one (1) Business Day after delivery to such courier service with and instructions for overnight delivery. The parties may change their respective addresses, transmission numbers and electronic mail address by written notice to all other parties, sent as provided in this Section. All communications must be in writing and addressed as follows:

IF TO TBT:

Timothy N. Bryan

Chairman and Chief Executive Officer

TB&T Bancshares, Inc.

1716 Briarcrest Drive, Suite 400

P.O. Box 5847

Brian, Texas 77805-5847

Phone: (979)260-2101

Fax: (979)691-5474

E-Mail: tbryan@banktbt.com

WITH A COPY TO:

Chet A. Fenimore

Fenimore Kay Harrison & Ford, LLP

812 San Antonio Street, Suite 600

Austin, Texas 78701

Phone: (512)583-5901

Fax: (512)583-5940

E-Mail: cfenimore@fkhpartners.com

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IF TO FFIN:

F. Scott Dueser

President and Chief Executive Officer

First Financial Bankshares, Inc.

400 Pine Street

Abilene, Texas 79601

Phone:(325) 627-7031

Fax:(325) 627-7393

E-Mail: sdueser@ffin.com

WITH A COPY TO:

Michael G. Keeley

Norton Rose Fulbright US LLP

2200 Ross Avenue, Suite 3600

Dallas, Texas 75201

Phone:(214) 855-3906

Fax:(214) 855-8200

E-Mail: mike.keeley@nortonrosefulbright.com

Section 10.09    GOVERNING LAW. THIS AGREEMENT IS TO BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAWS OF THE STATE OF TEXAS, WITHOUT REGARD FOR THE PROVISIONS THEREOF REGARDING CHOICE OF LAW. VENUE FOR ANY CAUSE OF ACTION BETWEEN THE PARTIES TO THIS AGREEMENT WILL LIE IN TAYLOR COUNTY, TEXAS.

Section 10.10    WAIVER OF JURY TRIAL. EACH PARTY ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY WHICH MAY ARISE UNDER THIS AGREEMENT IS LIKELY TO INVOLVE COMPLICATED AND DIFFICULT ISSUES, AND THEREFORE EACH SUCH PARTY HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT SUCH PARTY MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY SUIT, ACTION OR OTHER PROCEEDING DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT. EACH PARTY CERTIFIES AND ACKNOWLEDGES THAT: (A) NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF ANY ACTION, SUIT OR PROCEEDING, SEEK TO ENFORCE THE FOREGOING WAIVER, (B) EACH PARTY UNDERSTANDS AND HAS CONSIDERED THE IMPLICATIONS OF THIS WAIVER, (C) EACH PARTY MAKES THIS WAIVER VOLUNTARILY, AND (D) EACH PARTY HAS BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THISSECTION 10.10.

Section 10.11    Multiple Counterparts. For the convenience of the parties hereto, this Agreement may be signed in multiple counterparts, each of which will be deemed an original, and all counterparts hereof so signed by the parties hereto, whether or not such counterpart will bear the execution of each of the parties hereto, will be deemed to be, and is to be construed as, one and the same Agreement. A facsimile or electronic scan in “PDF” format of a signed counterpart of this Agreement will be sufficient to bind the party or parties whose signature(s) appear thereon.

Section 10.12    Definitions. For purposes of this Agreement, the following terms have the meanings specified or referred to in this section:

“Acquisition Proposal” means any of the following: (a) a merger, consolidation, or any similar transaction of any entity with TBT or any Subsidiary of TBT, (b) a purchase, lease or other acquisition of all

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or substantially all the assets of TBT or any Subsidiary of TBT, (c) a purchase or other acquisition of “beneficial ownership” by any “person” or “group” (as such terms are defined in Section 13(d)(3) of Exchange Act) (including by way of merger, consolidation, share exchange, or otherwise) that would cause such person or group to become the beneficial owner of any securities of TBT or any Subsidiary of TBT after the date of this Agreement, (d) a tender or exchange offer to acquire any securities of TBT or any Subsidiary of TBT, (e) a public proxy or consent solicitation made to the shareholders of TBT or any Subsidiary of TBT seeking proxies in opposition to any proposal relating to any of the transactions contemplated by this Agreement, or (f) the making of a bona fide offer or proposal to the board of directors or shareholders of TBT or any Subsidiary of TBT to engage in one or more of the transactions referenced in clauses (a) through (e) above.

“Affiliate” means, with respect to any Person or entity, any Person or entity that, directly or indirectly, controls, is controlled by, or is under common control with, such Person or entity in question. For the purposes of this definition, “control” (including, with correlative meaning, the terms “controlled by” and “under common control with”) as used with respect to any Person or entity, means the possession, directly or indirectly, of the power to direct or cause the direction of the management and policies of such Person or entity, whether through the ownership of voting securities or by contract or otherwise.

“Agreement” has the meaning set forth in the preamble.

“Bank” has the meaning set forth in the Recitals.

“Bank Call Reports” shall have the meaning set forth inSection 3.05(b).

“Bank Merger” shall have the meaning set forth in Recitals.

“Bank Merger Agreement” shall have the meaning set forth in theSection 1.11.

“Bank Stock” shall have the meaning set forth inSection 3.03(b).

“Bankruptcy Exception” means, in respect of any agreement, contract, commitment or obligation, any limitation thereon imposed by any bankruptcy, insolvency, fraudulent conveyance, reorganization, receivership, moratorium or similar Law affecting creditors’ rights and remedies generally and, with respect to the enforceability of any agreement, contract, commitment or obligation, by general principles of equity, including principles of commercial reasonableness, good faith and fair dealing, regardless of whether enforcement is sought in a proceeding at Law or in equity.

“BHCA” has the meaning set forth in the preamble.

“Business Day” means a day that the Bank is open to the public for the conduct of banking business.

“Call Report” means Consolidated Reports of Condition and Income.

“Cancelled Shares” shall have the meaning set forth inSection 1.05(e).

“Certificate” shall have the meaning set forth inSection 1.06(c).

“Certificate of Merger” shall have the meaning set forth inSection 2.01(b).

“Closing” shall have the meaning set forth inSection 2.01(a).

“Closing Date” shall have the meaning set forth inSection 2.01(a).

“Code” shall have the meaning set forth in the Recitals.

“Continued Employee” shall have the meaning set forth inSection 6.07.

“Controlled Group Plans” shall have the meaning set forth inSection 3.28(g).

“CRA” shall have the meaning set forth inSection 3.32.

“Director Support Agreement” shall have the meaning set forth inSection 5.24.

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“Dissenting Shares” shall have the meaning set forth inSection 1.09.

“Dodd-Frank Act” shall have the meaning set forth inSection 3.36.

“Effective Time” shall have the meaning set forth inSection 2.01(b).

“Employee Plans” shall have the meaning set forth inSection 3.28(a).

“Environmental Inspections” shall have the meaning set forth inSection 5.12(a).

“Environmental Laws” means the common law and all federal, state, local and foreign Laws or regulations, codes, orders, decrees, judgments or injunctions issued, promulgated, approved or entered thereunder, now or hereafter in effect, relating to pollution or protection of public or employee health or safety or the environment, including Laws relating to (i) emissions, discharges, releases or threatened releases of Hazardous Materials, into the environment (including ambient air, indoor air, surface water, ground water, land surface or subsurface strata), (ii) the manufacture, processing, distribution, use, generation, treatment, storage, disposal, transport or handling of Hazardous Materials, (iii) underground and above ground storage tanks, and related piping, and emissions, discharges, releases or threatened releases therefrom, and (iv) the conservation of open space, ecosystems, wetlands or water of the United States or a state, and (v) the preservation of cultural or historic structures or artifacts.

“ERISA” shall have the meaning set forth inSection 3.28(a).

“Exchange Act” shall have the meaning set forth inSection 4.03(b).

“Exchange Agent” shall have the meaning set forth inSection 1.06(a).

“Exchange Fund” shall have the meaning set forth inSection 1.06(b).

“Exchange Ratio” shall have the meaning set forth inSection 1.05(b).

“FDIA” shall have the meaning set forth inSection 2.02(e).

“FDIC” shall have the meaning set forth inSection 2.02(e).

“Federal Reserve” shall have the meaning set forth inSection 3.08.

“FFB” shall have the meaning set forth in the Recitals.

“FFIN” shall have the meaning set forth in the preamble.

“FFIN Board” shall have the meaning set forth in the Recitals.

“FFIN Constituent Documents” shall have the meaning set forth inSection 4.05(b).

“FFIN SEC Reports” shall have the meaning set forth inSection 4.04(a).

“FFIN Stock” shall have the meaning set forth in the Recitals.

“GAAP” shall have the meaning set forth inSection 3.05(a).

“Governmental Entity” means any court, arbitrator, administrative agency or commission, board, bureau or other governmental or Regulatory Agency or instrumentality.

“Hazardous Material” means any pollutant, contaminant, chemical, or toxic or hazardous substance, constituent, material or waste, or any other chemical, substances, constituent or waste including, among others, asbestos, lead-based paint, urea-formaldehyde, petroleum, crude oil or any fraction thereof or any petroleum product.

“Indemnified Parties” shall have the meaning set forth inSection 6.12(a).

“Integrated Mergers” shall have the meaning set forth in the Recitals.

“IRS” shall have the meaning set forth inSection 3.12(m).

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A person has “Knowledge” of, or acts “Knowingly” with respect to, a particular fact or other matter if any individual who is presently serving as a director or “executive officer” (as such term is defined of 12 C.F.R. Part 215 (Regulation O)) of that person, after reasonable inquiry, is actually aware of such fact or other matter.

“Law” shall mean any federal or state constitution, statute, regulation, rule, or common law applicable to a Person.

“Leases” shall have the meaning set forth inSection 3.11(a)(i).

“Letter of Transmittal” shall have the meaning set forth inSection 1.06(c).

“Lien(s)” means any mortgage, security interest, pledge, charges, encumbrance or lien (statutory or otherwise).

“Listed Contracts” shall have the meaning set forth inSection 3.11(a).

“Material Adverse Change” with respect to any party means any material adverse change in the business, results of operations, condition (financial or otherwise), assets, properties, liabilities (absolute, accrued, contingent or otherwise) or reserves, taken as a whole, of such party has occurred, but excluding any change with respect to, or effect on, such party resulting from: (i) any changes in Laws or interpretations thereof that are generally applicable to the banking or savings industries; (ii) changes in GAAP or RAP that are generally applicable to the banking or savings industries; (iii) expenses incurred in connection with the transactions contemplated by this Agreement; (iv) changes in global, national or regional political conditions or general economic or market conditions in the United States or the State of Texas, including changes in prevailing interest rates, credit availability and liquidity, currency exchange rates, and price levels or trading volumes in the United States or foreign securities markets affecting other companies in the financial services industry; (v) general changes in the credit markets or general downgrades in the credit markets; (vi) actions or omissions of a party taken as required by this Agreement or with the prior informed written consent of the other party or parties in contemplation of the transactions contemplated by this Agreement; or (vii) any outbreak or escalation of hostilities, declared or undeclared acts of war or terrorism; provided, that with respect to clause (i) through (vii), such party is not affected to a greater extent than other Persons, bank holding companies or insured depository institutions in the industry in which such party operates.

“Merger” shall have the meaning set forth in the Recitals.

“Merger Consideration” shall have the meaning set forth inSection 1.05(b).

“Merger Sub” shall have the meaning set forth in the preamble.

“Nonqualified Deferred Compensation Plan” shall have the meaning set forth inSection 3.28(k).

“Order” shall mean any award, decision, decree, injunction, judgment, order, ruling, or verdict entered, issued, made or rendered by any court, administrative agency or any other Governmental Entity.

“PEO” shall have the meaning set forth inSection 3.27(c).

“PEO Agreement” shall have the meaning set forth inSection 3.27(c).

“PEO-Sponsored Plan” shall have the meaning set forth inSection 3.28(a).

“PEO-Sponsored Retirement Plan” shall have the meaning set forth inSection 5.14(a).

“Permitted Dividends” means any declaration, set aside or payment of any cash dividends or any other cash distribution to the TBT shareholders up to an aggregate amount equal to the sum of (i) $2,000,000, plus (ii) solely in the event that the Closing has not occurred before the Q1 Dividend Record Date, an aggregate amount equal to the product of (a) the per share cash dividend on FFIN Stock declared by the FFIN Board with a Q1 Dividend Record Date multiplied by (b) 6,275,806 (which is the number of shares of FFIN Stock constituting the Merger Consideration). For the avoidance of doubt, TBT shall be permitted to pay the Permitted Dividends on or prior to the Closing Date.

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“Permitted Encumbrances” shall mean only (i) Liens for Taxes not yet due and payable and that do not constitute penalties, (ii) Liens for Taxes being contested in good faith by appropriate proceedings, (iii) statutory Liens of landlords, (iv) Liens of carriers, warehousemen, mechanics, materialmen and repairmen incurred in the ordinary course of business consistent with past practice and not yet delinquent, (v) zoning, building, or other restrictions, variances, covenants, rights of way, rights of subtenants, encumbrances, easements and other minor irregularities in title, none of which, individually or in the aggregate, interfere in any material respect with the present use of or occupancy of the affected parcel by the Bank, or have a material detrimental effect on the value thereof or its present use.

“Person” means an individual, a partnership, a corporation, a limited liability company, an association, a joint stock company, a trust, a joint venture, an unincorporated organization, any other business entity, or a Governmental Entity (or any department, agency, or political subdivision thereof).

“Property” or “Properties” shall include all real property currently owned or leased by the Bank, including properties that the Bank has foreclosed on as well as the premises and all improvements and fixtures thereon of the Bank.

“Proprietary Rights” shall have the meaning set forth inSection 3.15.

“Proxy Statement/Prospectus” shall have the meaning set forth inSection 5.02(d).

“Q1 Dividend Record Date” means the record date set between January 1, 2020 and March 31, 2020 at the regularly scheduled meeting of the FFIN Board for determining the shareholders of FFIN who are entitled to receive the regular quarterly cash dividend on FFIN Stock, if any.

“RAP” shall have the meaning set forth inSection 3.05(b).

“Registration Statement” shall have the meaning set forth inSection 5.13(a).

“Regulatory Agency” means any self-regulatory organization, the Federal Reserve, the FDIC, the OCC, the SEC, or any other federal or state governmental or regulatory agency or authority having or claiming jurisdiction over a party to this Agreement or the transactions contemplated hereby.

“Retirement Plan” shall have the meaning set forth inSection 5.14(a).

“Scheduled Payments” means the payments to be made at the Closing in the amounts, on the terms and to the Persons set forth onConfidential Schedule 10.12.

“SEC” shall have the meaning set forth inSection 3.08.

“Second Certificate of Merger” shall have the meaning set forth inSection 1.10.

“Second Effective Time” shall have the meaning set forth inSection 1.10.

“Second Step Merger” shall have the meaning set forth in the Recitals.

“Secondary Investigation” shall have the meaning set forth inSection 5.12(a).

“Securities Act” shall have the meaning set forth inSection 4.03(b).

“Shareholders’ Meeting” shall have the meaning set forth inSection 5.02(a).

“SOA�� shall have the meaning set forth inSection 5.22(b).

“Subsidiary” means, when used with reference to an entity, any corporation, a majority of the outstanding voting securities of which are owned directly or indirectly by such entity or any partnership, joint venture or other enterprise in which any entity has, directly or indirectly, a majority equity interest.

“Surviving Corporation” shall have the meaning set forth inSection 1.01.

“Tail Coverage” shall have the meaning set forth inSection 5.17.

“Tax” or “Taxes” means all (i) United States federal, state or local ornon-United States taxes, assessments, charges, duties, levies, interest or other similar governmental charges of any nature, including

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all income, franchise, profits, capital gains, capital stock, transfer, sales, use, occupation, property, excise, severance, windfall profits, stamp, stamp duty reserve, license, payroll, withholding, ad valorem, value added, alternative minimum, environmental, customs, social security (or similar), unemployment, sick pay, disability, registration and other taxes, assessments, charges, duties, interest, fees, levies or other similar governmental charges of any kind whatsoever, whether disputed or not, together with all estimated taxes, deficiency assessments, additions to tax, charges, duties, levies, penalties and interest; (ii) any liability for the payment of any amount of a type described in clause (i) arising as a result of being or having been a member of any consolidated, combined, unitary or other group or being or having been included or required to be included in any Tax Return related thereto; and (iii) any liability for the payment of any amount of a type described in clause (i) or clause (ii) as a result of any obligation to indemnify or otherwise assume or succeed to the liability of any other Person.

“Tax Return” means any return, declaration, report, claim for refund, or information return or statement relating to Taxes required to be filed with an Governmental Entity, including any schedule or attachment thereto, and including any amendment thereof.

“TBOC” shall have the meaning set forth inSection 1.01.

“TBT” shall have the meaning set forth in the preamble.

“TBT Board” shall have the meaning set forth in the Recitals.

“TBT Constituent Documents” shall have the meaning set forth inSection 3.04(a).

“TBT Financial Statements” shall have the meaning set forth in Section 3.05(a).

“TBT Option” shall have the meaning set forth inSection 5.28.

“TBT Shareholder Approval” shall have the meaning set forth inSection 5.02(b).

“TBT-Sponsored Plan” shall have the meaning set forth inSection 3.28(a).

“TBT Stock” shall have the meaning set forth inSection 1.05(b).

“TBT Stock Plans” shall have the meaning set forth inSection 5.28.

“TBT Warrant” shall have the meaning set forth inSection 5.30.

“TCPA” shall have the meaning set forth inSection 2.02(c).

“TDB” shall have the meaning set forth inSection 2.02(b).

“Treasury Regulations” means the regulations promulgated by the United States Department of the Treasury pursuant to and in respect of provisions of the Code. All references herein to sections of the Treasury Regulations shall include any corresponding provision or provisions of succeeding, similar, substitute proposed or final Treasury Regulations.

Section 10.13    Specific Performance. Each of the parties hereto acknowledges that the other parties would be irreparably damaged and would not have an adequate remedy at law for money damages if any of the covenants contained in this Agreement were not performed in accordance with its terms or otherwise were materially breached. Each of the parties hereto therefore agrees that, without the necessity of proving actual damages or posting bond or other security, the other party will be entitled to temporary and/or permanent injunction or injunctions which a court of competent jurisdiction concludes is justified to prevent breaches of such performance and to specific enforcement of such covenants in addition to any other remedy to which they may be entitled, at law or in equity.

Section 10.14    Attorneys’ Fees and Costs. If attorneys’ fees or other costs are incurred to secure performance of any of the obligations herein provided for, or to establish damages for the breach thereof, or to obtain any other appropriate relief, the prevailing party is entitled to recover reasonable attorneys’ fees and costs incurred therein and determined by the court to be justified.

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Section 10.15    Rules of Construction. Whenever the words “include,” “includes” or “including” are used in this Agreement, they are deemed to be followed by the words “without limitation.” The words “hereof,” “herein” and “hereunder” and words of similar import when used in this Agreement refer to this Agreement as a whole and not to any particular provision in this Agreement. Each use herein of the masculine, neuter or feminine gender are deemed to include the other genders. Each use herein of the plural include the singular and vice versa, in each case as the context requires or as is otherwise appropriate. The word “or” is used in the inclusive sense. Any agreement or instrument defined or referred to herein or in any agreement or instrument that is referred to herein means such agreement or instrument as from time to time amended, modified or supplemented, including by waiver or consent. References to a Person are also to its permitted successors or assigns.

Section 10.16    Articles, Sections, Exhibits and Schedules. All articles and sections referred to herein are articles and sections, respectively, of this Agreement and all exhibits and schedules referred to herein are exhibits and schedules, respectively, attached to this Agreement. Descriptive headings as to the contents of particular sections are for convenience only and do not control or affect the meaning, construction or interpretation of this Agreement or any particular section. Any and all schedules, exhibits, certificates or other documents or instruments referred to herein or attached hereto are and will be incorporated herein by reference hereto as though fully set forth herein.

Section 10.17    Public Disclosure. Neither FFIN nor TBT, or Affiliate or Subsidiary of the same, will make any announcement, statement, press release, acknowledgment or other public disclosure of the existence of, or reveal the terms, conditions or the status of, this Agreement or the transactions contemplated hereby without the prior written consent of the other parties to this Agreement; but FFIN and TBT are permitted to make any public disclosures or governmental filings as legal counsel may deem necessary to maintain compliance with or to prevent violations of applicable Law, that may be necessary to obtain regulatory approval for the transactions contemplated hereby, or that may be necessary to enforce the obligations under this Agreement.

Section 10.18    Extension; Waiver. At any time prior to the Closing Date, the parties may (a) extend the time for the performance of any of the obligations or other acts of the other parties hereto, (b) waive any inaccuracies in the representations and warranties contained herein or in any document, certificate or writing delivered pursuant hereto, or (c) waive compliance with any of the agreements, covenants or conditions contained herein. Such action will be evidenced by a signed written notice given in the manner provided inSection 10.08. No party to this Agreement will by any act (except by a written instrument given pursuant toSection 10.08) be deemed to have waived any right or remedy hereunder or to have acquiesced in any breach of any of the terms and conditions hereof. No failure to exercise, nor any delay in exercising any right, power or privilege hereunder by any party hereto will operate as a waiver thereof. No single or partial exercise of any right, power or privilege hereunder will preclude any other or further exercise thereof or the exercise of any other right, power or privilege. A waiver of any party of any right or remedy on any one occasion will not be construed as a bar to any right or remedy that such party would otherwise have on any future occasion or to any right or remedy that any other party may have hereunder. Any party may unilaterally waive a right which is solely applicable to it.

Section 10.19    Amendment. This Agreement may be amended, modified or supplemented only by an instrument in writing executed by the party against which enforcement of the amendment, modification or supplement is sought.

Section 10.20    No Third Party Beneficiaries. Nothing contained in this Agreement, express or implied, is intended to confer upon any Persons, other than the parties hereto or their respective successors, any rights, remedies, obligations, or liabilities under or by reason of this Agreement.

[Signature Page Follows]

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IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be signed by their duly authorized officers as of the date first above written.

FIRST FINANCIAL BANKSHARES, INC.
By:	/s/ F. Scott Dueser
	F. Scott Dueser
	President and Chief Executive Officer
BRAZOS MERGER SUB, INC.
By:	/s/ F. Scott Dueser
	F. Scott Dueser
	President
TB&T BANCSHARES, INC.
By:	/s/ Timothy N. Bryan
	Timothy N. Bryan
	Chairman and Chief Executive Officer

[Signature Page to Agreement and Plan of Reorganization]

Appendix B

FORM OF VOTING AGREEMENT

ThisVOTING AGREEMENT(this “Agreement”) dated as of September 19, 2019, is executed by and among First Financial Bankshares, Inc. (“FFIN”), a Texas corporation and registered bank holding company under the Bank Holding Company Act of 1956, as amended (the “BHCA”), TB&T Bancshares, Inc., a Texas corporation and registered bank holding company under the BHCA (“TBT”), F. Scott Dueser (“Proxy Holder”), as proxy, and the shareholders of TBT listed on the signature pages to this Agreement (referred to herein individually as a “Shareholder” and collectively as the “Shareholders”). Terms with their initial letters capitalized and not otherwise defined herein have the meanings given them in the Merger Agreement (as defined below).

RECITALS

WHEREAS, concurrently with the execution of this Agreement, FFIN, Brazos Merger Sub, Inc. (“Merger Sub”), a Texas corporation and wholly-owned subsidiary of FFIN, and TBT, have entered into that certain Agreement and Plan of Reorganization, dated as of the date hereof (the “Merger Agreement”), providing for, among other things, FFIN’s acquisition of TBT through the merger of Merger Sub with and into TBT, with TBT surviving the merger as a wholly owned subsidiary of FFIN (the “Merger”);

WHEREAS, the Merger Agreement provides that all of the issued and outstanding shares of common stock, par value $1.00 per share, of TBT (the “Common Stock”), other than Cancelled Shares and Dissenting Shares, will be exchanged for such consideration as set forth in the Merger Agreement;

WHEREAS, as a condition and inducement to FFIN’s willingness to enter into the Merger Agreement, each of the Shareholders have agreed to vote their shares of Common Stock in favor of approval of the Merger Agreement and the transactions contemplated thereby; and

WHEREAS, FFIN is relying on the agreements set forth herein in incurring expenses in reviewing the business of TBT and The Bank & Trust of Bryan/College Station, a Texas banking association with its principal offices in Bryan, Texas and a wholly owned subsidiary of TBT (the “Bank”), in proceeding with the filing of applications for regulatory approvals, and in undertaking other actions necessary for the consummation of the Merger, and the Shareholders are benefiting both from such expenditures by FFIN and by the terms of the Merger Agreement.

NOW, THEREFORE, for and in consideration of the foregoing and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, TBT, FFIN, the Proxy Holder and the Shareholders undertake, promise, covenant and agree with each other as follows:

AGREEMENT

1.    Each Shareholder, being the registered owner or beneficial owner of the number of shares of Common Stock set forth below the Shareholder’s name on the signature pages hereto (for each such Shareholder, the “Shares”), will vote, direct to vote, or act by consent with respect to:

(a) the Shares;

(b) all Common Stock the Shareholder owns as of the record date of any meeting of the shareholders of TBT or otherwise as of the date of such vote or consent; and

(c) all Common Stock the Shareholder owns beneficially and has the power and authority to direct the voting thereof as of the record date of any meeting of the shareholders of TBT or otherwise as of the date of such vote or consent

(clauses (a), (b) and (c), collectively, the “Proxy Shares”), in favor of approval of the Merger Agreement, the Merger and any other transactions contemplated by the Merger Agreement.

2.    If TBT conducts a meeting of or otherwise seeks approval of its shareholders with respect to any Acquisition Proposal or any other matter that may contradict this Agreement or the Merger Agreement or may prevent FFIN or TBT from completing the Merger, then the Shareholders will vote the Proxy Shares against the approval of the Acquisition Proposal or otherwise act in the manner most favorable to completing the Merger and the transactions contemplated by the Merger Agreement.

3.    Each Shareholder shall not invite or seek any Acquisition Proposal, support (or publicly suggest that anyone else should support) any Acquisition Proposal that may be made, or ask the TBT Board to consider, support or seek any Acquisition Proposal or otherwise take any action designed to make any Acquisition Proposal more likely. None of the Shareholders shall meet or otherwise communicate with any Person that makes or is considering making an Acquisition Proposal or any representative of such Person after becoming aware that the Person has made or is considering making an Acquisition Proposal. Each Shareholder shall promptly advise TBT of each contact the Shareholder or any of the Shareholder’s representatives may receive from any Person relating to any Acquisition Proposal or otherwise indicating that any Person may wish to participate or engage in any transaction arising out of any Acquisition Proposal and will provide TBT with all information FFIN requests that is available to the Shareholder regarding any such Acquisition Proposal or possible Acquisition Proposal. Each Shareholder will not make any claim or join in any litigation alleging that the TBT Board is required to consider, endorse or support any Acquisition Proposal or to invite or seek any Acquisition Proposal. Each Shareholder shall not take any other action that is reasonably likely to make consummation of the Merger less likely or to impair FFIN’s ability to exercise any of the rights granted by the Merger Agreement.

4.    Each Shareholder, severally, but not jointly, represents and warrants to FFIN that:

(a) Shareholder (i) owns beneficially (as such term is defined in Rule13d-3 under the Exchange Act) all of the Shares free and clear of all liens or encumbrances, (ii) except pursuant hereto, there are no options, warrants or other rights, agreements, arrangements or commitments of any character to which Shareholder is a party relating to the pledge, disposition or voting of any of the Shares and there are no voting trusts or voting agreements with respect to the Shares, and (iii) has the sole voting power over all of the Shares.

(b) Shareholder does not beneficially own any Common Stock other than (i) the Shares and (ii) any options, warrants or other rights to acquire any additional shares of Common Stock or any security exercisable for or convertible into shares of Common Stock, set forth on the signature page of this Agreement.

(c) Shareholder has full power and authority and legal capacity to enter into, execute and deliver this Agreement and to perform fully Shareholder’s obligations hereunder (including the proxy described inSection 5 below). This Agreement has been duly and validly executed and delivered by Shareholder and constitutes the legal, valid and binding obligation of Shareholder, enforceable against Shareholder in accordance with its terms.

(d) None of the execution and delivery of this Agreement by Shareholder, the consummation by Shareholder of the transactions contemplated hereby or compliance by Shareholder with any of the provisions hereof will conflict with or result in a breach, or constitute a default (with or without notice or lapse of time or both) under any provision of, any trust agreement, loan or credit agreement, note, bond, mortgage, indenture, lease or other agreement, instrument or law applicable to Shareholder or to Shareholder’s property or assets.

(e) No consent, approval or authorization of, or designation, declaration or filing with, any Governmental Entity or other Person on the part of Shareholder is required in connection with the valid execution and delivery of this Agreement. No consent of Shareholder’s spouse is necessary under any “community property” or other laws in order for Shareholder to enter into and perform its obligations under this Agreement.

(f) Shareholder hereby (a) confirms his or her knowledge of the availability of the rights of dissenting shareholders under the Texas Business Organizations Code (the “TBOC”) with respect to the Merger

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and (b) confirms receipt of a copy of the provisions of the TBOC related to the rights of dissenting shareholders. Each Shareholder hereby waives and agrees not to assert, and shall use its best efforts to cause any of its Affiliates who hold of record any of the Shareholder’s Shares to waive and not to assert, any appraisal rights with respect to the Merger that the Shareholder or such Affiliate may now or hereafter have with respect to any Shares (or any other shares of capital stock of TBT that the Shareholder shall hold of record at the time that the Shareholder may be entitled to assert appraisal rights with respect to the Merger) whether pursuant to the TBOC or otherwise.

5.    In order to better effect the provisions ofSections 1 and2 of this Agreement, each Shareholder hereby revokes any previously executed proxies and hereby constitutes and appoints Proxy Holder, with full power of substitution, his true and lawful proxy andattorney-in-fact to vote at any meeting of the shareholders of TBT all of the Proxy Shares in favor of the approval of the Merger Agreement, the Merger and any other transactions contemplated by the Merger Agreement, with such modifications to the Merger Agreement as the parties thereto may make;provided, however, that this proxy will not apply with respect to any vote on approval of the Merger Agreement if the Merger Agreement is modified so as to (a) reduce the amount of consideration or the form of consideration to be received by the Shareholder or (b) materially alter the tax consequences of the receipt thereof under the Merger Agreement in its present form. This proxy shall be limited strictly and solely to the power and authority to vote the Proxy Shares in the manner and for the purpose set forth inSections 1 and2 of this Agreement and shall not extend to any other matters.

6.    Each Shareholder hereby covenants and agrees that until this Agreement is terminated in accordance with its terms, each Shareholder will not, and will not agree to, without the consent of FFIN, directly or indirectly, sell, transfer, assign, pledge, encumber, hypothecate, cause to be redeemed or otherwise dispose of (any such transaction, a “Transfer”) any of the Shares or grant any proxy or interest in or with respect to any Shares or deposit any such Shares into a voting trust or enter into another voting agreement or arrangement with respect to such Shares except as contemplated by this Agreement. Any attempted Transfer of Shares or any interest therein in violation of this Section shall be null and void. This Section shall not prohibit a Transfer of the Shares to any member of Shareholder’s immediate family, to another Shareholder, to a trust for the benefit of Shareholder or any member of Shareholder’s immediate family, or upon the death of Shareholder; provided, that a Transfer referred to in this sentence shall be permitted only if, as a precondition to such Transfer, the transferee agrees in a writing, reasonably satisfactory in form and substance to FFIN and TBT, to be bound by all of the terms of this Agreement.

7.    Proxy Holder, by his execution below, agrees to (a) vote all of the Shareholders’ Proxy Shares at any meeting of the shareholders of TBT, in favor of the approval of the Merger Agreement, the Merger and any other transactions contemplated by the Merger Agreement, with such modifications to the Merger Agreement as the parties thereto may make;provided, however, that this proxy will not apply with respect to any vote on approval of the Merger Agreement if the Merger Agreement is modified so as to (i) reduce the amount of consideration or the form of consideration to be received by the Shareholder or (ii) materially alter the tax consequences of the receipt thereof under the Merger Agreement in its present form, and (b) in the event of an Acquisition Proposal, to vote all of the Shareholders’ Proxy Shares at any meeting of the shareholders of TBT, against the approval of the Acquisition Proposal or otherwise act in the manner most favorable to completing the Merger and the transactions contemplated by the Merger Agreement.

8.    Each Shareholder acknowledges that FFIN and TBT are relying on this Agreement in incurring expenses in connection with FFIN’s review of TBT and the Bank’s business, in FFIN’s preparation, with TBT’s cooperation, of a proxy statement and Registration Statement on FormS-4, in FFIN’s proceeding with the filing of applications for regulatory approvals, and in their undertaking other actions necessary for completing the Merger and thatTHE PROXY GRANTED HEREBY IS COUPLED WITH AN INTEREST AND IS IRREVOCABLE TO THE FULL EXTENT PERMITTED BY APPLICABLE LAW, INCLUDING TO THE EXTENT APPLICABLE, SECTION 21.369 OF THE TBOC.The Shareholders and TBT acknowledge that the performance of this Agreement is intended to benefit FFIN.

9.    This Agreement shall remain in effect until the earliest to occur of (a) the termination of the Merger Agreement, as it may be amended or extended from time to time, pursuant to the terms and

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conditions contained therein, (b) completion of the transactions contemplated by the Merger Agreement, or (c) one (1) year after the date of this Agreement.

10.    Proxy Holder may, in his sole discretion, appoint a substitute proxy to act as Proxy Holder under this Agreement; provided, that any substitute proxy shall agree in writing to be bound by the terms and conditions of this Agreement. In the event of the death, disability or incapacity of Proxy Holder, FFIN, in its sole discretion, may appoint a substitute proxy to act as Proxy Holder under this Agreement.

11.    The vote of the Proxy Holder will control in any conflict between his vote of the Proxy Shares and a vote by the substitute proxy holder or the Shareholders of the Proxy Shares, and TBT agrees to recognize the vote of the Proxy Holder instead of the vote of substitute proxy holder or the Shareholders if the substitute proxy holder or the Shareholders do not vote in accordance withSections 1 and2 of this Agreement.

12.    This Agreement may not be amended, modified, altered or supplemented with respect to a particular Shareholder except upon the execution and delivery of a written agreement executed by FFIN, TBT, Proxy Holder and that Shareholder. Any such amendment, modification, alteration or supplement shall only apply to the Shareholder(s) executing such written agreement and this Agreement will remain in full force and effect with respect to Shareholders who do not execute such written agreement.

13.    For the convenience of the parties hereto, this Agreement may be signed in multiple counterparts, each of which will be deemed an original, and all counterparts hereof so signed by the parties hereto, whether or not such counterpart will bear the execution of each of the parties hereto, will be deemed to be, and is to be construed as, one and the same Agreement. An email or electronic scan in “PDF” format of a signed counterpart of this Agreement will be sufficient to bind the party or parties whose signature(s) appear thereon.

14.    This Agreement, the Merger Agreement, the Director Support Agreements and the other agreements, documents, schedules and instruments signed and delivered by the parties to each other at the Closing are the full understanding of the parties, a complete allocation of risks between them and a complete and exclusive statement of the terms and conditions of their agreement relating to the subject matter hereof and supersede any and all prior agreements, whether written or oral, that may exist between the parties with respect thereto.

15.    Any and all notices, requests, instructions and other communications required or permitted to be given under this Agreement after the date of this Agreement by any party hereto to any other party may be delivered personally or by nationally recognized overnight courier service or sent by mail or (except in the case of payments) by email or facsimile, at the respective addresses or transmission numbers set forth below and is deemed delivered (a) in the case of personal delivery, email or facsimile, when received; (b) in the case of mail, upon the earlier of actual receipt or five (5) Business Days after deposit in the United States Postal Service, first class certified or registered mail, postage prepaid, return receipt requested; and (c) in the case of an overnight courier service, one (1) Business Day after delivery to such courier service with instructions for overnight delivery. The parties may change their respective addresses and transmission numbers by written notice to all other parties, sent as provided in this Section. All communications must be in writing and addressed as follows:

IF TO TBT OR THE SHAREHOLDERS:

Timothy N. Bryan

Chairman and Chief Executive Officer

TB&T Bancshares, Inc.

1716 Briarcrest Drive, Suite 400

P.O. Box 5847

Bryan, Texas 77805-5847

Phone:                    

Fax:                    

E-Mail:                     

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WITH A COPY (WHICH SHALL NOT CONSTITUTE NOTICE) TO:

Chet A. Fenimore, Esq.

Fenimore Kay Harrison & Ford, LLP

812 San Antonio Street, Suite 600

Austin, Texas 78701

Phone:                    

Fax:                    

E-Mail:                     

IF TO FFIN OR PROXY HOLDER:

F. Scott Dueser

President and Chief Executive Officer

First Financial Bankshares, Inc.

400 Pine Street

Abilene, Texas 79601

Phone:                    

Fax:                    

E-Mail:                     

WITH A COPY (WHICH SHALL NOT CONSTITUTE NOTICE) TO:

Michael G. Keeley, Esq.

Norton Rose Fulbright US LLP

2200 Ross Avenue, Suite 3600

Dallas, Texas 75201-7932

Fax:                    

E-Mail:                     

16.    THIS AGREEMENT IS TO BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAWS OF THE STATE OF TEXAS, WITHOUT REGARD FOR THE PROVISIONS THEREOF REGARDING CHOICE OF LAW THAT WOULD APPLY THE LAW OF A DIFFERENT JURISDICTION. VENUE FOR ANY CAUSE OF ACTION BETWEEN THE PARTIES TO THIS AGREEMENT WILL LIE IN TAYLOR COUNTY, TEXAS. EACH PARTY ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY WHICH MAY ARISE UNDER THIS AGREEMENT IS LIKELY TO INVOLVE COMPLICATED AND DIFFICULT ISSUES, AND THEREFORE EACH SUCH PARTY HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT SUCH PARTY MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY SUIT, ACTION OR OTHER PROCEEDING DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT. EACH PARTY CERTIFIES AND ACKNOWLEDGES THAT: (A) NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF ANY ACTION, SUIT OR PROCEEDING, SEEK TO ENFORCE THE FOREGOING WAIVER, (B) EACH PARTY UNDERSTANDS AND HAS CONSIDERED THE IMPLICATIONS OF THIS WAIVER, (C) EACH PARTY MAKES THIS WAIVER VOLUNTARILY, AND (D) EACH PARTY HAS BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THISSECTION 16.

17.    All of the terms, covenants, representations, warranties and conditions of this Agreement are binding upon, and inure to the benefit of and are enforceable by, the parties and their respective successors, representatives and permitted assigns. No party to this Agreement may assign this Agreement, by operation of law or otherwise, in whole or in part, without the prior written consent of the other parties, and any

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purported assignment made or attempted in violation of this Section shall be null and void. Nothing contained in this Agreement, express or implied, is intended to confer upon any Persons, other than the parties hereto or their respective successors, any rights, remedies, obligations, or liabilities under or by reason of this Agreement.

18.    If any provision of this Agreement is held to be illegal, invalid or unenforceable under present or future laws, then (a) this Agreement is to be construed and enforced as if such illegal, invalid or unenforceable provision were not a part hereof; (b) the remaining provisions of this Agreement will remain in full force and effect and will not be affected by such illegal, invalid or unenforceable provision or by its severance from this Agreement; and (c) there will be added automatically as a part of this Agreement a provision mutually agreed to which is similar in terms to such illegal, invalid or unenforceable provision as may be possible and still be legal, valid and enforceable.

19.    Each of the parties hereto acknowledges that the other parties would be irreparably damaged and would not have an adequate remedy at law for money damages if any of the covenants contained in this Agreement were not performed in accordance with its terms or otherwise were materially breached. Each of the parties hereto therefore agrees that, without the necessity of proving actual damages or posting bond or other security, the other party will be entitled to temporary and/or permanent injunction or injunctions which a court of competent jurisdiction concludes is justified to prevent breaches of such performance and to specific enforcement of such covenants in addition to any other remedy to which they may be entitled, at law or in equity.

[Signature Page Follows]

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IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the date first above written.

FIRST FINANCIAL BANKSHARES, INC.
By:
	F. Scott Dueser, President and Chief Executive Officer
PROXY HOLDER:
F. Scott Dueser
TB&T BANCSHARES, INC.
By:
Timothy N. Bryan, Chairman and Chief Executive Officer

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APPENDIX C

FORM OF DIRECTOR SUPPORT AGREEMENT

ThisDIRECTOR SUPPORT AGREEMENT (the “Agreement”) is made and entered into as of September 19, 2019, by and between First Financial Bankshares, Inc., a Texas corporation and registered bank holding company under the Bank Holding Company Act of 1956, as amended (the “BHCA”), with its principal offices in Abilene, Texas (“FFIN”), and                 , an individual resident of the State of Texas (“Director”). Terms with their initial letters capitalized and not otherwise defined herein have the meanings given to them in the Merger Agreement (as defined below).

RECITALS

WHEREAS, FFIN, Brazos Merger Sub, Inc., a Texas corporation and wholly owned subsidiary of FFIN (“Merger Sub”), and TB&T Bancshares, Inc., a Texas corporation and registered bank holding company under the BHCA (“TBT”), have entered into an Agreement and Plan of Reorganization, dated as of the date hereof (the “Merger Agreement”), providing for FFIN’s acquisition of TBT through the merger of Merger Sub with and into TBT, with TBT surviving as a wholly owned subsidiary of FFIN (the “Merger”); and

WHEREAS, as a condition and inducement to FFIN’s willingness to enter into the Merger Agreement, FFIN and Director have agreed to enter into this Agreement.

NOW, THEREFORE, in consideration of the premises and mutual covenants contained herein and in the Merger Agreement intending to be legally bound hereby, FFIN and Director agree as follows;

AGREEMENT

1.    Director Support. Director agrees to use his or her good faith efforts to refrain from harming the goodwill of TBT, any Subsidiary of TBT (“TBT Subsidiary”), FFIN or any Subsidiary of FFIN, and their respective customer, client and vendor relationships. During the term of this Agreement, Director agrees to consider utilizing First Financial Bank, National Association, a national association with its principal office in Abilene, Texas and wholly owned subsidiary of FFIN, when obtaining banking products or services for his or her personal or business needs.

2.    Director Covenants.

(a)    Director acknowledges that he or she has received substantial, valuable consideration, including confidential trade secret and proprietary information relating to the identity and special needs of current and prospective customers of TBT or any TBT Subsidiary, TBT’s and any TBT Subsidiary’s current and prospective services, TBT’s and any TBT Subsidiary’s business projections and market studies, TBT’s and any TBT Subsidiary’s business plans and strategies, TBT’s and any TBT Subsidiary’s studies, and information concerning special services unique to TBT or any TBT Subsidiary. Director further acknowledges and agrees that this consideration constitutes fair and adequate consideration for the execution of thenon-solicitation andnon-competition restrictions set forth below. Accordingly, other than in any capacity for or on behalf of FFIN or any Subsidiary of FFIN, Director agrees that Director will not, directly or indirectly, individually or as an employee, partner, officer, director or shareholder or in any other capacity whatsoever:

i.    solicit the business of any person or entity who is a customer of TBT or any TBT Subsidiary as of the date of this Agreement or as of the Closing Date on behalf of any other insured depository institution for the purpose of providing financial services to such person or entity;

ii.    acquire any interest in (directly or indirectly), charter, operate or enter into any franchise or other management agreement with any insured depository institution that has a location within a 35 mile radius of any location of TBT or any TBT Subsidiary (the “Noncompete Area”) (but notwithstanding the foregoing,

Director may (1) acquire an ownership interest in any publicly-traded depository institution, so long as that ownership interest does not exceed 1% of the total number of shares outstanding of that depository institution, and (2) invest in an existing mutual fund that invests, directly or indirectly, in such insured depository institutions);

iii.    from and after the Effective Time, serve as an officer, director, employee, agent or consultant to any insured depository institution that has a location within the Noncompete Area;

iv.    establish or operate a branch or other office of an insured depository institution within the Noncompete Area; or

v.    recruit, hire, assist others in recruiting or hiring, discuss employment with, or refer others concerning employment, any person who is, or within the 12 months preceding the Closing Date was, an employee of TBT or any TBT Subsidiary; but nothing in thisSection 2(a)(v) applies to employment other than in financial services.

Director may not avoid the purpose and intent of thisSection 2(a) by engaging in conduct within the Noncompete Area from a remote location through means such as telecommunications, written correspondence, computer generated or assisted communications, or other similar methods.

(b)    If any court of competent jurisdiction should determine that the terms of thisSection 2 are too broad in terms of time, geographic area, lines of commerce or otherwise, that court is to modify and revise any such terms so that they comply with applicable law.

(c)    Director agrees that (i) this Agreement is entered into in connection with the sale to FFIN of TBT and The Bank & Trust of Bryan/College Station, a Texas banking association with its principal place of business in Bryan, Texas (the “Bank”), (ii) Director is receiving valuable consideration for this Agreement, (iii) the restrictions imposed upon Director by this Agreement are essential and necessary to ensure FFIN acquires the goodwill of the TBT and the Bank, and (iv) all the restrictions (including particularly the time and geographical limitations) set forth in this Agreement are fair and reasonable.

3.    Early Resolution Conference. This Agreement is understood to be clear and enforceable as written and is executed by both parties on that basis. However, should Director later challenge any provision as unclear, unenforceable, or inapplicable to any competitive activity that Director intends to engage in, Director will first notify FFIN in writing and meet with a FFIN representative and a neutral mediator (if FFIN elects to retain one at its expense) to discuss resolution of any disputes between the parties. Director will provide this notice at leasttwenty-one (21) days before Director engages in any activity on behalf of a competing business or engages in other activity that could foreseeably fall within a questioned restriction. If Director fails to comply with this requirement, Director waives his right to challenge the reasonable scope, clarity, applicability or enforceability of this Agreement and its restrictions at a later time.

4.    Termination. This Agreement and all obligations hereunder will terminate on the earlier of (a) the date the Merger Agreement is terminated pursuant to Section 9.01 of the Merger Agreement or (b) the date that is twenty-four (24) months after the Closing Date.

5.    Waiver, Amendment and Modification. Any party may unilaterally waive a right which is solely applicable to it. Such action will be evidenced by a signed written notice. No failure to exercise nor any delay in exercising any right, power or privilege hereunder by any party hereto will operate as a waiver thereof. No single or partial exercise of any right, power or privilege hereunder will preclude any other or further exercise thereof or the exercise of any other right, power or privilege. A waiver of any party of any right or remedy on any one occasion will not be construed as a bar to any right or remedy that such party would otherwise have on any future occasion or to any right or remedy that any other party may have hereunder. This Agreement may be amended, modified or supplemented only by an instrument in writing executed by each of the parties hereto.

6.    Governing Law. THIS AGREEMENT IS TO BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAWS OF THE STATE OF TEXAS WITHOUT REGARD FOR THE

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PROVISIONS THEREOF REGARDING CHOICE OF LAW THAT WOULD APPLY THE LAW OF A DIFFERENT JURISDICTION. VENUE FOR ANY CAUSE OF ACTION BETWEEN THE PARTIES TO THIS AGREEMENT WILL LIE IN TAYLOR COUNTY, TEXAS. EACH PARTY ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY WHICH MAY ARISE UNDER THIS AGREEMENT IS LIKELY TO INVOLVE COMPLICATED AND DIFFICULT ISSUES AND, THEREFORE, EACH SUCH PARTY IRREVOCABLY AND UNCONDITIONALLY WAIVES ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY LEGAL ACTION ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT. EACH PARTY TO THIS AGREEMENT CERTIFIES AND ACKNOWLEDGES THAT (A) NO REPRESENTATIVE OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT SEEK TO ENFORCE THE FOREGOING WAIVER IN THE EVENT OF A LEGAL ACTION, (B) SUCH PARTY HAS CONSIDERED THE IMPLICATIONS OF THIS WAIVER, (C) SUCH PARTY MAKES THIS WAIVER VOLUNTARILY, AND (D) SUCH PARTY HAS BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THISSECTION 6.

7.    Binding Effect; Assignment. All of the terms, covenants, representations, warranties and conditions of this Agreement are binding upon, and inure to the benefit of and are enforceable by, the parties and their respective successors, representatives and permitted assigns. No party to this Agreement may assign this Agreement, by operation of law or otherwise, in whole or in part, without the prior written consent of the other parties, and any purported assignment made or attempted in violation of this Section shall be null and void.

8.    No Third Party Beneficiaries. Nothing contained in this Agreement, express or implied, is intended to confer upon any Persons, other than the parties hereto or their respective successors, any rights, remedies, obligations, or liabilities under or by reason of this Agreement.

9.    Severability. If any provision of this Agreement is held to be illegal, invalid or unenforceable under present or future laws, then (a) this Agreement is to be construed and enforced as if such illegal, invalid or unenforceable provision were not a part hereof; (b) the remaining provisions of this Agreement will remain in full force and effect and will not be affected by such illegal, invalid or unenforceable provision or by its severance from this Agreement; and (c) there will be added automatically as a part of this Agreement a provision mutually agreed to which is similar in terms to such illegal, invalid or unenforceable provision as may be possible and still be legal, valid and enforceable.

10.    Specific Performance. Each of the parties hereto acknowledges that the other parties would be irreparably damaged and would not have an adequate remedy at law for money damages if any of the covenants contained in this Agreement were not performed in accordance with its terms or otherwise were materially breached. Each of the parties hereto therefore agrees that, without the necessity of proving actual damages or posting bond or other security, the other party will be entitled to temporary and/or permanent injunction or injunctions which a court of competent jurisdiction concludes is justified to prevent breaches of such performance and to specific enforcement of such covenants in addition to any other remedy to which they may be entitled, at law or in equity.

11.    Entire Agreement. This Agreement, the Merger Agreement, the Voting Agreement and the other agreements, documents, schedules and instruments signed and delivered by the parties to each other at the Closing are the full understanding of the parties, a complete allocation of risks between them and a complete and exclusive statement of the terms and conditions of their agreement relating to the subject matter hereof and supersede any and all prior agreements, whether written or oral, that may exist between the parties with respect thereto.

12.    Rules of Construction. Descriptive headings as to the contents of particular sections are for convenience only and do not control or affect the meaning, construction or interpretation of this Agreement or any particular section. Whenever the words “include,” “includes” or “including” are used in this Agreement, they are deemed to be followed by the words “without limitation.” The words “hereof,”

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“herein” and “hereunder” and words of similar import when used in this Agreement refer to this Agreement as a whole and not to any particular provision in this Agreement. Each use herein of the masculine, neuter or feminine gender is deemed to include the other genders. Each use herein of the plural includes the singular and vice versa, in each case as the context requires or as is otherwise appropriate. The word “or” is used in the inclusive sense. Any agreement or instrument defined or referred to herein or in any agreement or instrument that is referred to herein means such agreement or instrument as from time to time amended, modified or supplemented, including by waiver or consent. References to a Person are also to its permitted successors or assigns. In the event that an ambiguity or a question of intent or interpretation arises, this Agreement shall be construed as if drafted jointly by the parties, and no presumption or burden of proof shall arise favoring or disfavoring any party by virtue of the authorship of any provision of this Agreement.

13.    Notice. Any and all notices, requests, instructions and other communications required or permitted to be given under this Agreement after the date of this Agreement by any party hereto to any other party may be delivered personally or by nationally recognized overnight courier service or sent by U.S. mail or (except in the case of payments) by facsimile transmission, at the respective addresses or transmission numbers set forth below and is deemed delivered (a) in the case of personal delivery or facsimile transmission, when received; (b) in the case of mail, upon the earlier of actual receipt or five (5) Business Days after deposit in the United States Postal Service, first class certified or registered mail, postage prepaid, return receipt requested; and (c) in the case of an overnight courier service, one (1) Business Day after delivery to such courier service with instructions for overnight delivery. The parties may change their respective addresses and transmission numbers by written notice to all other parties, sent as provided in this Section. All communications must be in writing and addressed as follows:

If to Director:

If to FFIN:

F. Scott Dueser

President and Chief Executive Officer

First Financial Bankshares, Inc.

400 Pine Street

Abilene, Texas 79601

Fax:                    

Email:                         

With a copy (which shall not constitute notice) to:

Michael G. Keeley, Esq.

Norton Rose Fulbright US LLP

2200 Ross Avenue, Suite 3600

Dallas, Texas 75201-7932

Fax:                    

Email:                    

14.    Articles, Sections, Exhibits and Schedules. All articles and sections referred to herein are articles and sections, respectively, of this Agreement and all exhibits and schedules referred to herein are exhibits and schedules, respectively, attached to this Agreement. Descriptive headings as to the contents of particular sections are for convenience only and do not control or affect the meaning, construction or interpretation of this Agreement or any particular section. Any and all schedules, exhibits, certificates or other documents or instruments referred to herein or attached hereto are and will be incorporated herein by reference hereto as though fully set forth herein.

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15.    Multiple Counterparts. For the convenience of the parties hereto, this Agreement may be signed in multiple counterparts, each of which will be deemed an original, and all counterparts hereof so signed by the parties hereto, whether or not such counterpart will bear the execution of each of the parties hereto, will be deemed to be, and is to be construed as, one and the same Agreement. A facsimile or electronic scan in “PDF” format of a signed counterpart of this Agreement will be sufficient to bind the party or parties whose signature(s) appear thereon.

[Signature Page Follows]

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IN WITNESS WHEREOF, the undersigned have executed this Agreement as of the date first above written.

DIRECTOR

Name:

FIRST FINANCIAL BANKSHARES, INC.

By:

Name: F. Scott Dueser

Title: President and Chief Executive Officer

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APPENDIX D

September 18, 2019

Board of Directors

TB&T Bancshares, Inc.

1716 Briarcrest Drive, Suite 400

Bryan, TX 77802

Dear Members of the Board:

We have acted as your financial advisor in connection with the proposed merger of TB&T Bancshares, Inc. (the “Company”) with and into First Financial Bankshares, Inc. (the “Buyer”) (collectively, the “Transaction”).    We understand that the consideration expected to be received for the outstanding common stock of the Company, in the aggregate, will consist of 6,275,806 shares of common stock of the Buyer. The terms and conditions of the Transaction are more fully set forth in an Agreement and Plan of Merger (the “Agreement”) by and between the Company and the Buyer. You have requested that we provide our opinion (the “Opinion”) as to whether the Transaction is fair to the Company from a financial point of view.

In connection with rendering our Opinion we have:

(i) analyzed certain publicly available financial statements and reports regarding the Company and the Buyer;

(ii) analyzed certain audited financial statements regarding the Company and the Buyer;

(iii) analyzed certain internal financial statements and other financial and operating data concerning the Company and the Buyer prepared by management of the Company and Buyer, respectively;

(iv) analyzed, on a pro forma basis, in reliance upon consensus research estimates and upon financial projections and other information and assumptions concerning the Company provided by the management team of the Company, the effect of the Transaction on the balance sheet, capitalization ratios, earnings and book value both in the aggregate and, where applicable, on a per share basis of the Company;

(v) reviewed the reported prices and trading activity for the common stock of the Buyer;

(vi) compared the financial performance of the Company and the Buyer with that of certain other publicly-traded companies and their securities that we deemed relevant to our analysis of the Transaction;

(vii) reviewed the financial terms, to the extent publicly available, of certain merger or acquisition transactions that we deemed relevant to our analysis of the Transaction;

(viii) reviewed the most recent draft of the Agreement and related documents provided to us by the Company;

(ix) discussed with management of the Company the operations of and future business prospects for the Company and the Buyer and the anticipated financial consequences of the Transaction to the Company;

(x) assisted in your deliberations regarding the material terms of the Transaction and your negotiations with the Buyer; and

(xi) performed such other analyses and provided such other services as we have deemed appropriate.

We have relied on the accuracy and completeness of the information and financial data provided to us by the Company and the Buyer and of the other information reviewed by us in connection with the preparation of our

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Opinion, and our Opinion is based upon such information. We have not assumed any responsibility for independent verification of the accuracy or completeness of any of such information or financial data. The management of the Company has assured us that they are not aware of any relevant information that has been omitted or remains undisclosed to us. We have not assumed any responsibility for making or undertaking an independent evaluation or appraisal of any of the assets or liabilities of the Company or of the Buyer, and we have not been furnished with any such evaluations or appraisals; nor have we evaluated the solvency or fair value of the Company or of the Buyer under any laws relating to bankruptcy, insolvency or similar matters. We have not assumed any obligation to conduct any physical inspection of the properties or facilities of the Company or Buyer. With respect to the financial forecasts prepared by the Company, including the forecasts of potential cost savings and potential synergies, we have assumed that such financial forecasts have been reasonably prepared and reflect the best currently available estimates and judgments of the management of the Company as to the future financial performance of the Company and that the financial results reflected by such projections will be realized as predicted. We have not received or reviewed any individual credit files nor have we made an independent evaluation of the adequacy of the allowance for loan losses of the Company or the Buyer. We have also assumed that the representations and warranties contained in the Agreement and all related documents are true, correct and complete in all material respects.

As part of our investment banking business, we regularly issue fairness opinions and are continually engaged in the valuation of companies and their securities in connection with business reorganizations, private placements, negotiated underwritings, mergers and acquisitions and valuations for estate, corporate and other purposes. We are familiar with the Company and the Buyer. During the two years preceding the date of this letter we have not received any fees from the Company or the Buyer in connection with investment banking services, and we have received compensation for securities brokerage services in customary amounts from the Buyer or its affiliates. We serve as financial adviser to the Company in connection with the Transaction, and we are entitled to receive from the Company a fee for our services as financial adviser to the Company, a portion of which is contingent upon the consummation of the Transaction. We are also entitled to receive a fee from the Company for providing our Opinion to the Board of Directors of the Company. The Company has also agreed to indemnify us for certain liabilities arising out of our engagement, including certain liabilities that could arise out of our providing this Opinion letter. Stephens expects to pursue future investment banking services assignments from the participants in this Transaction. In the ordinary course of business, Stephens Inc. and its affiliates at any time may hold long or short positions, and may trade or otherwise effect transactions as principal or for the accounts of customers, in debt or equity securities or options on securities of participants in the Transaction.

We are not legal, accounting, regulatory, or tax experts, and we have relied solely, and without independent verification, on the assessments of the Company and its other advisors with respect to such matters. We have assumed, with your consent, that the Transaction will not result in any unanticipated materially adverse legal, regulatory, accounting or tax consequences for the Company and that any reviews of legal, accounting, regulatory or tax issues conducted as a result of the Transaction will be resolved favorably to the Company.

The Opinion is necessarily based upon market, economic and other conditions as they exist and can be evaluated on the date hereof, and on the information made available to us as of the date hereof. It should be understood that subsequent developments may affect this Opinion and that we do not have any obligation to update, revise or reaffirm this Opinion. We have assumed that the Transaction will be consummated on the terms of the latest draft of the Agreement provided to us, without material waiver or modification. We have assumed that in the course of obtaining the necessary regulatory, lending or other consents or approvals (contractual or otherwise) for the Transaction, no restrictions, including any divestiture requirements or amendments or modifications, will be imposed that would have a material adverse effect on the contemplated benefits of the Transaction to the Company. We are not expressing any opinion herein as to the price at which the common stock or any other securities of the Company will trade following the announcement of the Transaction.

This Opinion is for the use and benefit of the Board of Directors of the Company for purposes of assisting with its evaluation of the Transaction. Our Opinion does not address the merits of the underlying decision by the

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Company to engage in the Transaction, the merits of the Transaction as compared to other alternatives potentially available to the Company or the relative effects of any alternative transaction in which the Company might engage, nor is it intended to be a recommendation to any person as to any specific action that should be taken in connection with the Transaction. This Opinion is not intended to confer any rights or remedies upon any other person. In addition, except as explicitly set forth in this letter, you have not asked us to address, and this Opinion does not address, the fairness to, or any other consideration of, the holders of any class of securities, creditors or other constituencies of the Company. We have not been asked to express any opinion, and do not express any opinion, as to the fairness of the amount or nature of the compensation to any of the Company’s officers, directors or employees, or to any group of such officers, directors or employees, relative to the compensation to other shareholders of the Company. Our Fairness Opinion Committee has approved the Opinion set forth in this letter. Neither this Opinion nor its substance may be disclosed by you to anyone other than your advisors without our written permission. Notwithstanding the foregoing, this Opinion and a summary discussion of our underlying analyses and role as financial adviser to the Company may be included in communications to shareholders of the Company, provided that we approve of the content of such disclosures prior to any filing or publication of such shareholder communications.

Based on the foregoing and our general experience as investment bankers, and subject to the assumptions and qualifications stated herein, we are of the opinion, on the date hereof, that the consideration to be exchanged by the Company in the Transaction is fair to the Company from a financial point of view.

Very truly yours,

STEPHENS INC.

By: /s/ Stephens Inc.

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APPENDIX E

TEXAS BUSINESS ORGANIZATIONS CODE

TITLE 1. GENERAL PROVISIONS

CHAPTER 10. MERGERS, INTEREST EXCHANGES,

CONVERSIONS, AND SALES OF ASSETS

SUBCHAPTER H. RIGHTS OF DISSENTING OWNERS

§ 10.351. APPLICABILITY OF SUBCHAPTER.

(a)    This subchapter does not apply to a fundamental business transaction of a domestic entity if, immediately before the effective date of the fundamental business transaction, all of the ownership interests of the entity otherwise entitled to rights to dissent and appraisal under this code are held by one owner or only by the owners who approved the fundamental business transaction.

(b)    This subchapter applies only to a “domestic entity subject to dissenters’ rights,” as defined in Section 1.002. That term includes a domesticfor-profit corporation, professional corporation, professional association, and real estate investment trust. Except as provided in Subsection (c), that term does not include a partnership or limited liability company.

(c)    The governing documents of a partnership or a limited liability company may provide that its owners are entitled to the rights of dissent and appraisal provided by this subchapter, subject to any modification to those rights as provided by the entity’s governing documents.

§ 10.352. DEFINITIONS.

In this subchapter:

(1)    “Dissenting owner” means an owner of an ownership interest in a domestic entity subject to dissenters’ rights who:

(A)    provides notice under Section 10.356; and

(B)    complies with the requirements for perfecting that owner’s right to dissent under this subchapter.

(2)    “Responsible organization” means:

(A)    the organization responsible for:

(i) the provision of notices under this subchapter; and

(ii) the primary obligation of paying the fair value for an ownership interest held by a dissenting owner;

(B)    with respect to a merger or conversion:

(i) for matters occurring before the merger or conversion, the organization that is merging or converting; and

(ii) for matters occurring after the merger or conversion, the surviving or new organization that is primarily obligated for the payment of the fair value of the dissenting owner’s ownership interest in the merger or conversion;

Appendix E-1

(C)    with respect to an interest exchange, the organization the ownership interests of which are being acquired in the interest exchange;

(D)    with respect to the sale of all or substantially all of the assets of an organization, the organization the assets of which are to be transferred by sale or in another manner; and

(E)    with respect to an amendment to a domesticfor-profit corporation’s certificate of formation described by Section 10.354(a)(1)(G), the corporation.

§ 10.353. FORM AND VALIDITY OF NOTICE.

(a)    Notice required under this subchapter:

(1)    must be in writing; and

(2)    may be mailed, hand-delivered, or delivered by courier or electronic transmission.

(b)    Failure to provide notice as required by this subchapter does not invalidate any action taken.

§ 10.354. RIGHTS OF DISSENT AND APPRAISAL.

(a)    Subject to Subsection (b), an owner of an ownership interest in a domestic entity subject to dissenters’ rights is entitled to:

(1)    dissent from:

(A)    a plan of merger to which the domestic entity is a party if owner approval is required by this code and the owner owns in the domestic entity an ownership interest that was entitled to vote on the plan of merger;

(B)    a sale of all or substantially all of the assets of the domestic entity if owner approval is required by this code and the owner owns in the domestic entity an ownership interest that was entitled to vote on the sale;

(C)    a plan of exchange in which the ownership interest of the owner is to be acquired;

(D)    a plan of conversion in which the domestic entity is the converting entity if owner approval is required by this code and the owner owns in the domestic entity an ownership interest that was entitled to vote on the plan of conversion;

(E)    a merger effected under Section 10.006 in which:

(i)    the owner is entitled to vote on the merger; or

(ii)    the ownership interest of the owner is converted or exchanged;

(F)    a merger effected under Section 21.459(c) in which the shares of the shareholders are converted or exchanged; or

(G)    if the owner owns shares that were entitled to vote on the amendment, an amendment to a domesticfor-profit corporation’s certificate of formation to:

(i)    add the provisions required by Section 3.007(e) to elect to be a public benefit corporation; or

Appendix E-2

(ii)    delete the provisions required by Section 3.007(e), which in effect cancels the corporation’s election to be a public benefit corporation; and

(2)    subject to compliance with the procedures set forth in this subchapter, obtain the fair value of that ownership interest through an appraisal.

(b)    Notwithstanding Subsection (a), subject to Subsection (c), an owner may not dissent from a plan of merger or conversion in which there is a single surviving or new domestic entity ornon-code organization, or from a plan of exchange, if:

(1)    the ownership interest, or a depository receipt in respect of the ownership interest, held by the owner:

(A)    in the case of a plan of merger, conversion, or exchange, other than a plan of merger pursuant to Section 21.459(c), is part of a class or series of ownership interests, or depository receipts in respect of ownership interests, that are, on the record date set for purposes of determining which owners are entitled to vote on the plan of merger, conversion, or exchange, as appropriate, are either:

(i)    listed on a national securities exchange; or

(ii)    held of record by at least 2,000 owners; or

(B)    in the case of a plan of merger pursuant to Section 21,459(c), is part of a class or series of ownership interests, or depository receipts in respect of ownership interests, that, immediately before the date the board of directors of the corporation that issued the ownership interest held, directly or indirectly, by the owner approves the plan of merger are either:

(i)    listed on a national securities exchange; or

(ii)    held of record by at least 2,000 owners;

(2)    the owner is not required by the terms of the plan of merger, conversion, or exchange, as appropriate, to accept for the owner’s ownership interest any consideration that is different from the consideration to be provided to any other holder of an ownership interest of the same class or series as the ownership interest held by the owner, other than cash instead of fractional shares or interests the owner would otherwise be entitled to receive; and

(3)    the owner is not required by the terms of the plan of merger, conversion, or exchange, as appropriate, to accept for the owner’s ownership interest any consideration other than:

(A)    ownership interests, or depository receipts in respect of ownership interests, of a domestic entity ornon-code organization of the same general organizational type that, immediately after the effective date of the merger, conversion, or exchange, as appropriate, will be part of a class or series of ownership interests, or depository receipts in respect of ownership interests, that are:

(i)    listed on a national securities exchange or authorized for listing on the exchange on official notice of issuance; or

(ii)    held of record by at least 2,000 owners;

(B)    cash instead of fractional ownership interests, or fractional depository receipts in respect of ownership interests, the owner would otherwise be entitled to receive; or

(C)    any combination of the ownership interests, or fractional depository receipts in respect of ownership interests, and cash described by Paragraphs (A) and (B).

Appendix E-3

(c)    Subsection (b) shall not apply to a domestic entity that is a subsidiary with respect to a merger under Section 10.006.

(d)    Notwithstanding Subsection (a), an owner of an ownership interest in a domesticfor-profit corporation subject to dissenters’ rights may not dissent from an amendment to the corporation’s certificate of formation described by Subsection (a)(1)(G) if the shares held by the owner are part of a class or series of shares, on the record date set for purposes of determining which owners are entitled to vote on the amendment:

(1)    listed on a national securities exchange; or

(2)    held of record by at least 2,000 owners.

§ 10.355. NOTICE OF RIGHT OF DISSENT AND APPRAISAL.

(a)    A domestic entity subject to dissenters’ rights that takes or proposes to take an action regarding which an owner has a right to dissent and obtain an appraisal under Section 10.354 shall notify each affected owner of the owner’s rights under that section if:

(1)    the action or proposed action is submitted to a vote of the owners at a meeting; or

(2)    approval of the action or proposed action is obtained by written consent of the owners instead of being submitted to a vote of the owners.

(b)    If a parent organization effects a merger under Section 10.006 and a subsidiary organization that is a party to the merger is a domestic entity subject to dissenters’ rights, the responsible organization shall notify the owners of that subsidiary organization who have a right to dissent to the merger under Section 10.354 of their rights under this subchapter not later than the 10th day after the effective date of the merger. The notice must also include a copy of the certificate of merger and a statement that the merger has become effective.

(b-1)    If a corporation effects a merger under Section 21.459(c), the responsible organization shall notify the shareholders of that corporation who have a right to dissent to the plan of merger under Section 10.354 of their rights under this subchapter not later than the 10th day after the effective date of the merger. Notice required under this subsection that is given to shareholders before the effective date of the merger may, but is not required to, contain a statement of the merger’s effective date. If the notice is not given to the shareholders until on or after the effective date of the merger, the notice must contain a statement of the merger’s effective date.

(c)    A notice required to be provided under Subsection (a), (b), or(b-1) must:

(1)    be accompanied by a copy of this subchapter; and

(2)    advise the owner of the location of the responsible organization’s principal executive offices to which a notice required under Section 10.356(b)(1) or a demand under Section 10.356(b)(3), or both, may be provided.

(d)    In addition to the requirements prescribed by Subsection (c), a notice required to be provided:

(1)    under Subsection (a)(1) must accompany the notice of the meeting to consider the action;

(2)    under Subsection (a)(2) must be provided to:

(A)    each owner who consents in writing to the action before the owner delivers the written consent; and

(B)    each owner who is entitled to vote on the action and does not consent in writing to the action before the 11th day after the date the action takes effect; and

Appendix E-4

(3)    under Subsection(b-1) must be provided:

(A)    if given before the consummation of the offer described by Section 21.459(c)(2), to each shareholder to whom that offer is made; or

(B)    if given after the consummation of the offer described by Section 21.459(c)(2), to each shareholder who did not tender the shareholder’s shares in that offer.

(e)    Not later than the 10th day after the date an action described by Subsection (a)(1) takes effect, the responsible organization shall give notice that the action has been effected to each owner who voted against the action and sent notice under Section 10.356(b)(1).

(f)    If the notice given under Subsection(b-1) did not include a statement of the effective date of the merger, the responsible organization shall, not later than the 10th day after the effective date, give a second notice to the shareholders notifying them of the merger’s effective date. If the second notice is given after the later of the date on which the offer described by Section 21.459(c)(2) is consummated or the 20th day after the date notice under Subsection(b-1) is given, then the second notice is required to be given to only those shareholders who have made a demand under Section 10.356(b)(3).

§ 10.356. PROCEDURE FOR DISSENT BY OWNERS AS TO ACTIONS; PERFECTION OF RIGHT OF DISSENT AND APPRAISAL.

(a)    An owner of an ownership interest of a domestic entity subject to dissenters’ rights who has the right to dissent and appraisal from any of the actions referred to in Section 10.354 may exercise that right to dissent and appraisal only by complying with the procedures specified in this subchapter. An owner’s right of dissent and appraisal under Section 10.354 may be exercised by an owner only with respect to an ownership interest that is not voted in favor of the action.

(b)    To perfect the owner’s rights of dissent and appraisal under Section 10.354, an owner:

(1)    if the proposed action is to be submitted to a vote of the owners at a meeting, must give to the domestic entity a written notice of objection to the action that:

(A)    is addressed to the entity’s president and secretary;

(B)    states that the owner’s right to dissent will be exercised if the action takes effect;

(C)    provides an address to which notice of effectiveness of the action should be delivered or mailed; and

(D)    is delivered to the entity’s principal executive offices before the meeting;

(2)    with respect to the ownership interest for which the rights of dissent and appraisal are sought:

(A)    must vote against the action if the owner is entitled to vote on the action and the action is approved at a meeting of the owners; and

(B)    may not consent to the action if the action is approved by written consent; and

(3)    must give to the responsible organization a demand in writing that:

(A)    is addressed to the president and secretary of the responsible organization;

(B)    demands payment of the fair value of the ownership interests for which the rights of dissent and appraisal are sought;

Appendix E-5

(C)    provides to the responsible organization an address to which a notice relating to the dissent and appraisal procedures under this subchapter may be sent;

(D)    states the number and class of the ownership interests of the domestic entity owned by the owner and the fair value of the ownership interests as estimated by the owner; and

(E)    is delivered to the responsible organization at its principal executive offices at the following time:

(i)    not later than the 20th day after the date the responsible organization sends to the owner the notice required by Section 10.355(e) that the action has taken effect, if the action was approved by a vote of the owners at a meeting;

(ii)    not later than the 20th day after the date the responsible organization sends to the owner the notice required by Section 10.355(d)(2) that the action has taken effect, if the action was approved by the written consent of the owners;

(iii)    not later than the 20th day after the date the responsible organization sends to the owner a notice that the merger was effected, if the action is a merger effected under Section 10.006; or

(iv)    not later than the 20th day after the date the responsible organization gives to the shareholder the notice required bySection 10.355(b-1) or the date of the consummation of the offer described by Section 21.459(c)(2), whichever is later, if the action is a merger effected under Section 21.459(c).

(c)    An owner who does not make a demand within the period required by Subsection (b)(3)(E) or, if Subsection (b)(1) is applicable, does not give the notice of objection before the meeting of the owners is bound by the action and is not entitled to exercise the rights of dissent and appraisal under Section 10.354.

(d)    Not later than the 20th day after the date an owner makes a demand under Subsection (b)(3), the owner must submit to the responsible organization any certificates representing the ownership interest to which the demand relates for purposes of making a notation on the certificates that a demand for the payment of the fair value of an ownership interest has been made under this section. An owner’s failure to submit the certificates within the required period has the effect of terminating, at the option of the responsible organization, the owner’s rights to dissent and appraisal under Section 10.354 unless a court, for good cause shown, directs otherwise.

(e)    If a domestic entity and responsible organization satisfy the requirements of this subchapter relating to the rights of owners of ownership interests in the entity to dissent to an action and seek appraisal of those ownership interests, an owner of an ownership interest who fails to perfect that owner’s right of dissent in accordance with this subchapter may not bring suit to recover the value of the ownership interest or money damages relating to the action.

§ 10.357. WITHDRAWAL OF DEMAND FOR FAIR VALUE OF OWNERSHIP INTEREST.

(a)    An owner may withdraw a demand for the payment of the fair value of an ownership interest made under Section 10.356 before:

(1)    payment for the ownership interest has been made under Sections 10.358 and 10.361; or

(2)    a petition has been filed under Section 10.361.

(b)    Unless the responsible organization consents to the withdrawal of the demand, an owner may not withdraw a demand for payment under Subsection (a) after either of the events specified in Subsections (a)(1) and (2).

Appendix E-6

§ 10.358. RESPONSE BY ORGANIZATION TO NOTICE OF DISSENT AND DEMAND FOR FAIR VALUE BY DISSENTING OWNER.

(a)    Not later than the 20th day after the date a responsible organization receives a demand for payment made by a dissenting owner in accordance with Section 10.356(b)(3), the responsible organization shall respond to the dissenting owner in writing by:

(1)    accepting the amount claimed in the demand as the fair value of the ownership interests specified in the notice; or

(2)    rejecting the demand and including in the response the requirements prescribed by Subsection (c).

(b)    If the responsible organization accepts the amount claimed in the demand, the responsible organization shall pay the amount not later than the 90th day after the date the action that is the subject of the demand was effected if the owner delivers to the responsible organization:

(1)    endorsed certificates representing the ownership interests if the ownership interests are certificated; or

(2)    signed assignments of the ownership interests if the ownership interests are uncertificated.

(c)    If the responsible organization rejects the amount claimed in the demand, the responsible organization shall provide to the owner:

(1)    an estimate by the responsible organization of the fair value of the ownership interests; and

(2)    an offer to pay the amount of the estimate provided under Subdivision (1).

(d)    If the dissenting owner decides to accept the offer made by the responsible organization under Subsection (c)(2), the owner must provide to the responsible organization notice of the acceptance of the offer not later than the 90th day after the date the action that is the subject of the demand took effect.

(e)    If, not later than the 90th day after the date the action that is the subject of the demand took effect, a dissenting owner accepts an offer made by a responsible organization under Subsection (c)(2) or a dissenting owner and a responsible organization reach an agreement on the fair value of the ownership interests, the responsible organization shall pay the agreed amount not later than the 120th day after the date the action that is the subject of the demand took effect, if the dissenting owner delivers to the responsible organization:

(1)    endorsed certificates representing the ownership interests if the ownership interests are certificated; or

(2)    signed assignments of the ownership interests if the ownership interests are uncertificated.

§ 10.359. RECORD OF DEMAND FOR FAIR VALUE OF OWNERSHIP INTEREST.

(a)    A responsible organization shall note in the organization’s ownership interest records maintained under Section 3.151 the receipt of a demand for payment from any dissenting owner made under Section 10.356.

(b)    If an ownership interest that is the subject of a demand for payment made under Section 10.356 is transferred, a new certificate representing that ownership interest must contain:

(1)    a reference to the demand; and

(2)    the name of the original dissenting owner of the ownership interest.

Appendix E-7

§ 10.360. RIGHTS OF TRANSFEREE OF CERTAIN OWNERSHIP INTEREST.

A transferee of an ownership interest that is the subject of a demand for payment made under Section 10.356 does not acquire additional rights with respect to the responsible organization following the transfer. The transferee has only the rights the original dissenting owner had with respect to the responsible organization after making the demand.

§ 10.361. PROCEEDING TO DETERMINE FAIR VALUE OF OWNERSHIP INTEREST AND OWNERS ENTITLED TO PAYMENT; APPOINTMENT OF APPRAISERS.

(a)    If a responsible organization rejects the amount demanded by a dissenting owner under Section 10.358 and the dissenting owner and responsible organization are unable to reach an agreement relating to the fair value of the ownership interests within the period prescribed by Section 10.358(d), the dissenting owner or responsible organization may file a petition requesting a finding and determination of the fair value of the owner’s ownership interests in a court in:

(1)    the county in which the organization’s principal office is located in this state; or

(2)    the county in which the organization’s registered office is located in this state, if the organization does not have a business office in this state.

(b)    A petition described by Subsection (a) must be filed not later than the 60th day after the expiration of the period required by Section 10.358(d).

(c)    On the filing of a petition by an owner under Subsection (a), service of a copy of the petition shall be made to the responsible organization. Not later than the 10th day after the date a responsible organization receives service under this subsection, the responsible organization shall file with the clerk of the court in which the petition was filed a list containing the names and addresses of each owner of the organization who has demanded payment for ownership interests under Section 10.356 and with whom agreement as to the value of the ownership interests has not been reached with the responsible organization. If the responsible organization files a petition under Subsection (a), the petition must be accompanied by this list.

(d)    The clerk of the court in which a petition is filed under this section shall provide by registered mail notice of the time and place set for the hearing to:

(1)    the responsible organization; and

(2)    each owner named on the list described by Subsection (c) at the address shown for the owner on the list.

(e)    The court shall:

(1)    determine which owners have:

(A)    perfected their rights by complying with this subchapter; and

(B)    become subsequently entitled to receive payment for the fair value of their ownership interests; and

(2)    appoint one or more qualified appraisers to determine the fair value of the ownership interests of the owners described by Subdivision (1).

Appendix E-8

(f)    The court shall approve the form of a notice required to be provided under this section. The judgment of the court is final and binding on the responsible organization, any other organization obligated to make payment under this subchapter for an ownership interest, and each owner who is notified as required by this section.

(g)    The beneficial owner of an ownership interest subject to dissenters’ rights held in a voting trust or by a nominee on the beneficial owner’s behalf may file a petition described by Subsection (a) if no agreement between the dissenting owner of the ownership interest and the responsible organization has been reached within the period prescribed by Section 10.358(d). When the beneficial owner files a petition described by Subsection (a):

(1)    the beneficial owner shall at that time be considered, for purposes of this subchapter, the owner, the dissenting owner, and the holder of the ownership interest subject to the petition; and

(2)    the dissenting owner who demanded payment under Section 10.356 has no further rights regarding the ownership interest subject to the petition.

§ 10.362. COMPUTATION AND DETERMINATION OF FAIR VALUE OF OWNERSHIP INTEREST.

(a)    For purposes of this subchapter, the fair value of an ownership interest of a domestic entity subject to dissenters’ rights is the value of the ownership interest on the date preceding the date of the action that is the subject of the appraisal. Any appreciation or depreciation in the value of the ownership interest occurring in anticipation of the proposed action or as a result of the action must be specifically excluded from the computation of the fair value of the ownership interest.

(b)    In computing the fair value of an ownership interest under this subchapter, consideration must be given to the value of the domestic entity as a going concern without including in the computation of value any control premium, any minority ownership discount, or any discount for lack of marketability. If the domestic entity has different classes or series of ownership interests, the relative rights and preferences of and limitations placed on the class or series of ownership interests, other than relative voting rights, held by the dissenting owner must be taken into account in the computation of value.

(c)    The determination of the fair value of an ownership interest made for purposes of this subchapter may not be used for purposes of making a determination of the fair value of that ownership interest for another purpose or of the fair value of another ownership interest, including for purposes of determining any minority or liquidity discount that might apply to a sale of an ownership interest.

§ 10.363. POWERS AND DUTIES OF APPRAISER; APPRAISAL PROCEDURES.

(a)    An appraiser appointed under Section 10.361 has the power and authority that:

(1)    is granted by the court in the order appointing the appraiser; and

(2)    may be conferred by a court to a master in chancery as provided by Rule 171, Texas Rules of Civil Procedure.

(b)    The appraiser shall:

(1)    determine the fair value of an ownership interest of an owner adjudged by the court to be entitled to payment for the ownership interest; and

(2)    file with the court a report of that determination.

Appendix E-9

(c)    The appraiser is entitled to examine the books and records of a responsible organization and may conduct investigations as the appraiser considers appropriate. A dissenting owner or responsible organization may submit to an appraiser evidence or other information relevant to the determination of the fair value of the ownership interest required by Subsection (b)(1).

(d)    The clerk of the court appointing the appraiser shall provide notice of the filing of the report under Subsection (b) to each dissenting owner named in the list filed under Section 10.361 and the responsible organization.

§ 10.364. OBJECTION TO APPRAISAL; HEARING.

(a)    A dissenting owner or responsible organization may object, based on the law or the facts, to all or part of an appraisal report containing the fair value of an ownership interest determined under Section 10.363(b).

(b)    If an objection to a report is raised under Subsection (a), the court shall hold a hearing to determine the fair value of the ownership interest that is the subject of the report. After the hearing, the court shall require the responsible organization to pay to the holders of the ownership interest the amount of the determined value with interest, accruing from the 91st day after the date the applicable action for which the owner elected to dissent was effected until the date of the judgment.

(c)    Interest under Subsection (b) accrues at the same rate as is provided for the accrual of prejudgment interest in civil cases.

(d)    The responsible organization shall:

(1)    immediately pay the amount of the judgment to a holder of an uncertificated ownership interest; and

(2)    pay the amount of the judgment to a holder of a certificated ownership interest immediately after the certificate holder surrenders to the responsible organization an endorsed certificate representing the ownership interest.

(e)    On payment of the judgment, the dissenting owner does not have an interest in the:

(1)    ownership interest for which the payment is made; or

(2)    responsible organization with respect to that ownership interest.

§ 10.365. COURT COSTS; COMPENSATION FOR APPRAISER.

(a)    An appraiser appointed under Section 10.361 is entitled to a reasonable fee payable from court costs.

(b)    All court costs shall be allocated between the responsible organization and the dissenting owners in the manner that the court determines to be fair and equitable.

§ 10.366. STATUS OF OWNERSHIP INTEREST HELD OR FORMERLY HELD BY DISSENTING OWNER.

(a)    An ownership interest of an organization acquired by a responsible organization under this subchapter:

(1)    in the case of a merger, conversion, or interest exchange, shall be held or disposed of as provided in the plan of merger, conversion, or interest exchange; and

Appendix E-10

(2)    in any other case, may be held or disposed of by the responsible organization in the same manner as other ownership interests acquired by the organization or held in its treasury.

(b)    An owner who has demanded payment for the owner’s ownership interest under Section 10.356 is not entitled to vote or exercise any other rights of an owner with respect to the ownership interest except the right to:

(1)    receive payment for the ownership interest under this subchapter; and

(2)    bring an appropriate action to obtain relief on the ground that the action to which the demand relates would be or was fraudulent.

(c)    An ownership interest for which payment has been demanded under Section 10.356 may not be considered outstanding for purposes of any subsequent vote or action.

§ 10.367. RIGHTS OF OWNERS FOLLOWING TERMINATION OF RIGHT OF DISSENT.

(a)    The rights of a dissenting owner terminate if:

(1)    the owner withdraws the demand under Section 10.356;

(2)    the owner’s right of dissent is terminated under Section 10.356;

(3)    a petition is not filed within the period required by Section 10.361; or

(4)    after a hearing held under Section 10.361, the court adjudges that the owner is not entitled to elect to dissent from an action under this subchapter.

(b)    On termination of the right of dissent under this section:

(1)    the dissenting owner and all persons claiming a right under the owner are conclusively presumed to have approved and ratified the action to which the owner dissented and are bound by that action;

(2)    the owner’s right to be paid the fair value of the owner’s ownership interests ceases;

(3)    the owner’s status as an owner of those ownership interests is restored, as if the owner’s demand for payment of the fair value of the ownership interests had not been made under Section 10.356, if the owner’s ownership interests were not canceled, converted, or exchanged as a result of the action or a subsequent action;

(4)    the dissenting owner is entitled to receive the same cash, property, rights, and other consideration received by owners of the same class and series of ownership interests held by the owner, as if the owner’s demand for payment of the fair value of the ownership interests had not been made under Section 10.356, if the owner’s ownership interests were canceled, converted, or exchanged as a result of the action or a subsequent action;

(5)    any action of the domestic entity taken after the date of the demand for payment by the owner under Section 10.356 will not be considered ineffective or invalid because of the restoration of the owner’s ownership interests or the other rights or entitlements of the owner under this subsection; and

(6)    the dissenting owner is entitled to receive dividends or other distributions made after the date of the owner’s payment demand under Section 10.356, to owners of the same class and series of ownership interests held by the owner as if the demand had not been made, subject to any change in or adjustment to the ownership interests because of an action taken by the domestic entity after the date of the demand.

Appendix E-11

§ 10.368. EXCLUSIVITY OF REMEDY OF DISSENT AND APPRAISAL.

In the absence of fraud in the transaction, any right of an owner of an ownership interest to dissent from an action and obtain the fair value of the ownership interest under this subchapter is the exclusive remedy for recovery of:

(1)    the value of the ownership interest; or

(2)    money damages to the owner with respect to the action.

Appendix E-12

PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

Item 20. Indemnification of Directors and Officers of First Financial.

The Amended and Restated Certificate of Formation, as amended, and the Amended and Restated Bylaws of First Financial Bankshares, Inc. (the “Registrant”) require the Registrant to indemnify officers and directors of the Registrant to the fullest extent permitted by Texas law. Generally, Chapter 8 of the TBOC permits a corporation to indemnify a person who was, is, or is threatened to be made a named defendant or respondent in a proceeding because the person was or is a director or officer if it is determined that such person (1) conducted himself in good faith, (2) reasonably believed (a) in the case of conduct in his official capacity as a director or officer of the corporation, that his conduct was in the corporation’s best interest, or (b) in other cases, that his conduct was at least not opposed to the corporation’s best interests, and (3) in the case of any criminal proceeding, had no reasonable cause to believe that his conduct was unlawful. In addition, the TBOC requires a corporation to indemnify a director or officer for any action that such director or officer is wholly successful in defending on the merits.

The Registrant’s Amended and Restated Certificate of Formation, as amended, provides that a director of the Registrant will not be liable to the corporation for monetary damages for an act or omission in the director’s capacity as a director, except to the extent not permitted by law. Texas law does not permit exculpation of liability in the case of (i) a breach of the director’s duty of loyalty to the corporation or its shareholders; (ii) an act or omission not in good faith that constitutes a breach of duty of the director to the corporation or that involves intentional misconduct or a knowing violation of the law; (iii) a transaction from which a director received an improper benefit, whether or not the benefit resulted from an action taken within the scope of the director’s office; or (iv) an act or omission for which the liability of the director is expressly provided by statute.

The Registrant’s Amended and Restated Certificate of Formation, as amended, permits the Registrant to purchase and maintain insurance on behalf of any person who is or was a director, officer, employee, or agent of the Registrant or who is or was serving at the request of the Registrant as a director, officer, employee or agent of another corporation or organization, against any liability asserted against such person and incurred by such person in such a capacity or arising out of such person’s status as such a person.

The Amended and Restated Certificate of Formation, as amended, and the Amended and Restated Bylaws of the Registrant were previously filed with the Securities and Exchange Commission and are incorporated by reference into the registration statement.

Item 21. Exhibits and Financial Statement Schedules.

(a) List of Exhibits

Exhibit	Description
2.1	Agreement and Plan of Reorganization, dated September  19, 2019, by and between First Financial Bankshares, Inc., Brazos Merger Sub, Inc. and TB&T Bancshares, Inc. (Schedules have been omitted pursuant to Item 601(b)(2) of RegulationS-K) (incorporated by reference from Exhibit 2.1 to Registrant’s Form8-K filed September 20, 2019).
3.1	Amended and Restated Certificate of Formation (incorporated by reference from Exhibit 3.1 of the Registrant’s Form10-Q filed July 30, 2019).
3.2	Amended and Restated Bylaws of the Registrant (incorporated by reference from Exhibit 99.1 of the Registrant’s Form8-K filed January 24, 2012).
4.1	Specimen certificate of First Financial Common Stock (incorporated by reference from Exhibit 3 of the Registrant’s Amendment No. 1 to Form8-A filed on Form8-A/A No. 1 on January 7, 1994).

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Exhibit	Description
5.1*	Opinion of Norton Rose Fulbright US LLP regarding the legality of the securities being registered.
8.1*	Opinion of Norton Rose Fulbright US LLP regarding certain tax matters.
8.2*	Opinion of Fenimore Kay Harrison & Ford, LLP regarding certain tax matters.
10.1	Form of Voting Agreement, between First Financial Bankshares, Inc. and certain shareholders of TB&T Bancshares, Inc. (attached as Appendix B to this proxy statement/prospectus).
10.2	Form of Director Support Agreement, between First Financial Bankshares, Inc. and each of the directors of TB&T Bancshares, Inc. (attached as Appendix C to this proxy statement/prospectus).
23.1	Consent of Ernst & Young LLP.
23.2*	Consent of Norton Rose Fulbright US LLP (included in Exhibit 5.1).
23.3*	Consent of Norton Rose Fulbright US LLP (included in Exhibit 8.1).
23.4*	Consent of Fenimore Kay Harrison & Ford, LLP (included in Exhibit 8.1).
24.1*	Power of Attorney of Directors and Officers of the Registrant (included on the signature page of this FormS-4).
99.1	Form of Proxy Card of TB&T Bancshares, Inc.
99.2*	Consent of Stephens Inc.

* Previously filed.

(b) Financial Statement Schedules

None. All other schedules for which provision is made in RegulationS-X of the Securities and Exchange Commission are not required under the related restrictions or are inapplicable, and, therefore, have been omitted.

(c) Opinion of Financial Advisor

Furnished asAppendix D to the proxy statement/prospectus, which forms a part of this Registration Statement on FormS-4.

Item 22. Undertakings.

The undersigned registrant hereby undertakes:

(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:

(i) to include any prospectus required by Section 10(a)(3) of the Securities Act of 1933;

(ii) to reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the SEC pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20 percent change in the maximum aggregate offering price set forth in the “Calculation of Registration Fee” table in the effective registration statement; and

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(iii) to include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement.

(2) That, for the purpose of determining any liability under the Securities Act of 1933, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

(4) That, for the purpose of determining liability of the registrant under the Securities Act of 1933 to any purchaser in the initial distribution of securities, in a primary offering of securities of the undersigned registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:

(i) any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be filed pursuant to Rule 424;

(ii) any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or used or referred to by the undersigned registrant;

(iii) the portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and

(iv) any other communication that is an offer in the offering made by the undersigned registrant to the purchaser.

(5) The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act of 1933, each filing of the registrant’s annual report pursuant to section 13(a) or section 15(d) of the Securities Exchange Act of 1934, as amended (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(6) That prior to any public reoffering of the securities registered hereunder through use of a prospectus which is a part of this registration statement, by any person or party who is deemed to be an underwriter within the meaning of Rule 145(c), the issuer undertakes that such reoffering prospectus will contain the information called for by the applicable registration form with respect to reofferings by persons who may be deemed underwriters, in addition to the information called for by the other items of the applicable form.

(7) That every prospectus (i) that is filed pursuant to paragraph (6) immediately preceding, or (ii) that purports to meet the requirements of section 10(a)(3) of the Securities Act of 1933 and is used in connection with an offering of securities subject to Rule 415, will be filed as a part of an amendment to the registration statement and will not be used until such amendment is effective, and that, for purposes of determining any liability under the Securities Act of 1933, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(8) To respond to requests for information that is incorporated by reference into the prospectus pursuant to Items 4, 10(b), 11 or 13 of this Form, within one business day of receipt of such request, and to send the incorporated

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documents by first class mail or other equally prompt means. This includes information contained in documents filed subsequent to the effective date of the registration statement through the date of responding to the request.

(9) To supply by means of a post-effective amendment all information concerning a transaction, and the company being acquired involved therein, that was not the subject of and included in the registration statement when it became effective.

(10) Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the Securities and Exchange Commission, such indemnification is against public policy as expressed in the Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Act and will be governed by the final adjudication of such issue.

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the registrant has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Abilene and State of Texas on October 29, 2019.

FIRST FINANCIAL BANKSHARES, INC. (Registrant)
By:	/s/ F. Scott Dueser
	F. Scott Dueser Chairman of the Board, President and Chief Executive Officer

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the dates indicated.

Signature	Title	Date
/s/ F. Scott Dueser F. Scott Dueser	Chairman of the Board, President and Chief Executive Officer, and Director (Principal Executive Officer)	October 29, 2019
/s/ J. Bruce Hildebrand J. Bruce Hildebrand	Executive Vice President and Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer)	October 29, 2019
* April K. Anthony	Director	October 29, 2019
* Tucker S. Bridwell	Director	October 29, 2019
* David Copeland	Director	October 29, 2019
* Mike Denny	Director	October 29, 2019
* Murray Edwards	Director	October 29, 2019
* Ron Giddiens	Director	October 29, 2019
* Tim Lancaster	Director	October 29, 2019
* Kade L. Matthews	Director	October 29, 2019
* Robert C. Nickles, Jr.	Director	October 29, 2019
* Ross H. Smith, Jr.	Director	October 29, 2019
* Johnny E. Trotter	Director	October 29, 2019

* By:	/s/ F. Scott Dueser
	Attorney-in-Fact October 29, 2019