Script for Reliant Bank Employees Continued Page 3 Forward-Looking Statements This document contains “for- ward-looking statements” within the meaning of Section 27A of theSecurities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. The words “believe,” “anticipate,” “expect,” “may,” “assume,” “should,”“predict,” “could,” “would,” “intend,” “targets,” “estimates,” “projects,” “plans,” and “potential,” and other similar words and expressions of similar meaning, and the negatives thereof, are intended to identify such forward-looking statements, but other statements not based on historical information may also be considered forward-looking, including statements about the expected timing and likeli- hood of completion of the proposed transaction (the “Transaction”), the benefits of the Transaction to Reliant Bancorp, Inc. (“Reliant”),Tennessee Community Bank Holdings, Inc. (“TCB Holdings”), and their respective shareholders, Reliant’s future financial and operating results (including the anticipated impact of the Transaction on Reliant’s earnings per share and tangible book value), and Reliant’s plans, objectives, and intentions.All forward-looking statements are subject to assumptions, risks, uncer- tainties, and other factors that may cause actual results, performance, or achievements to differ materially from any results, performance, or achieve- ments expressed or implied by such forward-looking statements. Such assumptions, risks, uncertainties, and factors include, among others, (1) the risk that expected cost savings and revenue synergies from the Transac- tion may not be realized or take longer than anticipated to be realized, (2) the parties’ ability to meet expectations regarding the timing and completion and accounting and tax treatment of the Transaction, (3) the effect of the announcement and pendency of the Transaction on customer, supplier, or employee relationships and operating results (including without limitation difficulties in maintaining relationships with employees and customers), as well as on the market price of Reliant’s common stock, (4) the risk that the parties’ businesses and operations cannot be successfully integrated or that integration will be more costlyor difficult than expected, (5) the occurrence of any event, change, or other circumstances that could give rise to the termination of the merger agreement, (6) the amount of costs, fees, expenses, and charges related to the Transaction, including those arising as a result of unexpected fac- tors or events, (7) the ability to obtain the shareholder and governmentalapprovals required for the Transaction,reputational risk associated with and the reaction of the parties’ cus- tomers, suppliers, employees, or other business partners to the Transaction,the failure of any of the conditions to the closing of the Transaction to be satisfied, or any unexpected delay in closing the Transaction, (10) the dilu- tion caused by Reliant’s issuance of additional shares of its common stock in the Transaction, and (11) general competitive, economic, political, and market conditions. Additional factors which could affect the forward-looking statements can be found in Reliant’s Annual Report on Form 10-K, Quarter- ly Reports on Form 10-Q, and Current Reports on Form 8-K, in each case filed with the Securities and Exchange Commission (the “SEC”) and available on the SEC’s website at www.sec.gov. Reliant and TCB Holdings believe the forward-looking statements contained herein are reasonable; however, un- due reliance should not be placed on any forward-looking statements, which are based on current expectationsand speak only as of the date that they are made. Reliant and TCB Holdings disclaim any obligation to update or revise any forward-looking statements, which speak only as of the date hereof, whether as a result of new information, future events, or otherwise. Additional Information about the Transaction and Where to Find It In connection with the Transaction,Reliant intends to file a registration statement on Form S-4 with the SEC to register the shares of Reliant common stock that will be issued to TCB Holdings’ shareholders in connection with the Transaction. The registration statement will include a proxy state- ment of TCB Holdings and prospectus of Reliant and other relevant materials pertaining to the Transaction. The proxy statement/prospectus will be sent to TCB Holdings’ shareholders in connection with seeking the required shareholder approval(s) for the Trans- action). INVESTORS AND SECURITY HOLDERS OF RELIANT AND TCB HOLDINGS ARE URGED TO READ THE REGISTRATION STATEMENT, PROXY STATEMENT/PROSPECTUS, AND OTHER RELEVANT MATERIALS THAT MAY BE FILED WITH THE SEC IN CONNECTION WITH THE TRANS- ACTION (AS WELL AS ANY AMEND- MENTS OR SUPPLEMENTS TO THESE DOCUMENTS) CAREFULLY ANDIN THEIR ENTIRETY IF AND WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT RELIANT, TCB HOLDINGS, AND THE TRANSACTION.Investors and security holders may obtain free copies of the registration statement and related proxy state- ment/prospectus, when filed, as well as other documents filed by Reliant with the SEC, through the website maintained by the SEC at www.sec. gov. Free copies of the documents filed by Reliant with the SEC (including the registration statement and related proxy statement/prospectus) also may be obtained by directing a request by mail or telephone to Reliant Bancorp, Inc., 6100 Tower Circle, Suite 120, Franklin, Tennessee 37067, Attention:J. Daniel Dellinger, Chief Financial Officer, (615) 221-2020.This communication is for informa- tional purposes only and shall not constitute a solicitation of any proxy, vote, or approval or an offer to sell or the solicitation of an offer to buyany securities, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation, or sale would be unlawful prior to registration or qualification under the securities laws of such jurisdiction. Participants in the Solicitation Reliant, TCB Holdings, and certain of their respective directors andexecutive officers may be deemed par- ticipants in the solicitation of proxies from TCB Holdings’ shareholders in connection with the Transaction. Cer- tain information about the directors and executive officers of Reliant and TCB Holdings will be included in the proxy statement/prospectus included in the registration statement on Form S-4 to be filed by Reliant with the SEC. Information about the directors and executive officers of Reliant can also be found in Reliant’s definitive proxy statement for its 2019 annual meeting of shareholders, filed with the SEC on April 22, 2019, and other documents subsequently filed by Reliant with the SEC. Additional information regarding the interests of these participants will also be included in the proxy state- ment/prospectus pertaining to the Transaction if and when it becomes available. These documents can be obtained free of charge in the manner described above.