The Board of Directors of the Company recommends that you vote:

Yes, please read below and consider whether you are a shareholder of record of Company sharescommon stock, or a beneficial owner of Company sharescommon stock held in street name.

If you are a holder of record of Company common stock, you may vote in person at the Annual Meeting. We will give you a ballot at the Annual Meeting.

If you do not wish to vote in person, or if you will not be attending the Annual Meeting, you may vote by proxy. If you received a printed copy of these proxy materials by mail, you may vote by proxy using the enclosed proxy card, vote by proxy on the Internet, or vote by proxy over the telephone. The procedures for voting by proxy are as follows:

If you vote by mail, your proxy must be received by 10:00 a.m., Eastern Time, on July 17, 2019, to be counted.

You may vote on the Internet or by telephone any time prior to 11:59 p.m., Eastern Time, on July 16, 2019.

We provide Internet proxy voting to allow you to vote your shareson-line, with procedures designed to ensure the authenticity and correctness of your proxy vote instructions. However, please be aware that you must bear any costs associated with your Internet access, such as usage charges from Internet access providers and telephone companies.

If you are a beneficial owner of shares of our common stock held in street name (i.e., your shares are held by a broker) and you received a printed copy of these proxy materials by mail, you should have received a voting instruction card with these proxy materials from the organization that is the record owner of your shares rather than from us. If you are a beneficial owner of shares held in street name and you received a notice by mail, you should have received the notice

4

card or may vote by telephone or over the Internet as instructed by that organization in the voting instruction card. Beneficial owners that received a notice by mail from the record owner should follow the instructions included in the notice to view the Proxy Statement and transmit their voting instructions. If you provide specific voting instructions, your broker or nominee will vote your shares as you direct.

A beneficial owner planning to vote in person at the Annual Meeting must obtain a valid proxy from the record owner. To request the requisite proxy form, follow the instructions provided by your broker or contact your broker.

Participants in the MainStreet Bank 401(k) Retirement Plan (“401(k) Plan”) with account assets invested in Company common stock will receive a Vote Instruction Form that allows them to direct the 401(k) Plan trustee to vote the Company common stock allocated to their 401(k) plan account. If a participant does not direct the 401(k) Plan trustee as to how to vote the Company common stock allocated to their 401(k) plan, the trustee will, subject to its fiduciary duty, vote such common stock in the same proportion as it has received voting instructions from other 401(k) Plan participants.The deadline for return of your 401(k) Vote Instruction Form is July 15, 2019May 18, 2021 at 5:00 p.m., local timetime..

If you are a holder of record of shares of Company common stock, you may change your vote or revoke your proxy at any time before your shares are voted at the Annual Meeting by:

Directors are elected by a plurality of the votes cast (Proposal One). Shareholders may vote “FOR” or “WITHHOLD” authority to vote for each nominee for the Board of Directors.Directors of the Company. If you withhold authority to vote with respect to any nominee, your shares will be counted for purposes of establishing a quorum but will have no effect on the election of that nominee.

The affirmative vote of the holders of a majority of the votes cast is required to approve the 2019 Equity Incentive Plan (Proposal Two).

The affirmative vote of a majority of the votes cast is required for ratification of the appointment of the independent registered public accounting firm (Proposal Three)Two).

If you are the registered holder of Company common stock and you sign and submit your proxy card without voting instructions, your shares will be counted for purposes of establishing a quorum and will be voted “FOR” each director nominee “FOR” Proposal Two and “FOR” Proposal Three.Two.

No. You may not accumulate your vote for the election of directors.

4

A broker“non-vote” occurs when your broker submits a proxy for your shares but does not indicate a vote for a particular proposal because the broker does not have discretionary authority to vote and has not received specific instructions from

5

It is expected that all directors, officers, and employees act in accordance with the highest standards of personal and professional conduct in all aspects of their employment and association with the Company and the Bank, to comply with all applicable laws, rules, and regulations and to adhere to all policies and procedures adopted by the Company and the Bank.

Board Leadership and Oversight

The Board of Directors currently combines the position of Chairman of the Board with the position of Chief Executive Officer, coupled with a lead independent director position to further strengthen the Company’s corporate governance

9

Director Attendance

The Board of Directors conducts its business through meetings of the boardBoard and through activities of its committees. During the year ended December 31, 2018,2020, the Board of Directors met a total of 1512 times, including regularly scheduled meetings and special meetings. No director attended fewer than 75% of the total meetings of the Board of Directors and meetings of the committees on which he or she served during the year ended December 31, 2018.2020. The Board encourages, but does not require, directors to attend annual meetings of shareholders. All directors attended the 20182020 Annual Meeting of Shareholders.

Committees of the Board of Directors

We conduct business through meetings of our Board of Directors and its committees. The Board of Directors of the Company has established standing committees, including a Nominating Committee, a Compensation Committee and an Audit and Risk Committee. Each of these committees operates under a written charter, which governs its composition, responsibilities, and operations. The table below sets forth the directors serving on each of the listed standing committees.

11

Compensation Committee.The Compensation Committee oversees the Company’s executive compensation and benefit policies and practices. The Committee met one timefour times during the 20182020 fiscal year. The Board of Directors has adopted a written Charter for the Compensation Committee that is available on the “Investor Relations” page of our website,https://ir.mstreetbank.com/govdocs. www.ir.mstreetbank.com/govdocs.

The Compensation Committee is responsible for establishing the compensation philosophy, developing compensation guidelines, and establishing (or recommending to the entire Board of Directors) the compensation of executive officers. No executive officer participates with respect to decisions on his or her compensation. The Compensation Committee may retain, at its discretion, compensation consultants to assist it in making compensation related decisions.

The Compensation Committee’s goal is to determine appropriate compensation levels that will enable the Company to, among other things: (i) attract, retain and motivate an experienced, competent executive management team; (ii) reward the executive management team for the enhancement of shareholder value based on our annual performance and the market price of our stock; (iii) provide compensation rewards that are adequately balanced between short-term and long-term performance goals; and (iv) maintain compensation levels that are competitive with other financial institutions, particularly those comparable in asset size and market area.

The Compensation Committee considers a number ofseveral factors in its decisions regarding executive compensation, including, but not limited to, the level of responsibility and performance of the individual executive officers and the overall performance of the Company. The Compensation Committee also considers the recommendations of senior management with respect to the compensation of executive officers and on matters of compensation philosophy, plan design and general guidelines for employee compensation. However, the Chairman and Chief Executive Officer does not vote on and is not present for any discussion of his own compensation.

Audit and Risk Committee.The Audit and Risk Committee is responsible for overseeing the accounting and financial reporting processes and the audits of the financial statements of the Company.TheCompany. The Committee met four times in fiscal year 2018.2020. The Board of Directors has adopted a written Charter for the Audit and Risk Committee that is available on the “Investor Relations” page of our website,https://ir.mstreetbank.com/govdocs. www.ir.mstreetbank.com/govdocs.

12

PROPOSAL ONE -

ELECTION OF DIRECTORS

The Board of Directors currently consists of nine directors. Under the Company’s Articles of Incorporation and Bylaws, the Board of Directors is divided into three groups (Group I, Group II and Group III) as nearly equal in number as possible. Except for director elections outside of the Annual Meeting, directors in only one group are elected each year, each for a three-year term. This year, three individuals have been nominated for election as directors of the Company for terms expiring at the 2021 annual meeting.2024 Annual Meeting of Shareholders.

The Board of Directors is not aware of any family relationship among any director, executive officer or person nominated to become a director; nor is the Board of Directors aware of any involvement of any director, executive officer or director nominee in any legal proceedings that would be material to an evaluation of the ability or integrity of any director, executive officer, or director nominee.

Each director nominee has consented to being named in this Proxy Statement and has agreed to serve if elected. If a nominee is unable to stand for election, the Board of Directors may either reduce the number of directors to be elected or select a substitute nominee. If a substitute nominee is selected, the proxy holders will vote your shares for the substitute nominee, unless you have withheld authority. At this time, we are not aware of any reason why a nominee might be unable to serve if elected.

The discussion below sets forth information regarding each director of the Company and each nominee for director, including his or her age, position on the Board and term of office. The Nominating Committee of the Board of Directors recommends nominees to the Board of Directors for election as directors. The three nominees currently serve as Company directors. With the exception of Mr. Brockett, who was elected a director of the Company and the Bank in January 2018, and Mr. Echlov, who was elected a director of the Company and the Bank in December 2018, all directors have served as directors of the Company since it was formed as the Bank’s holding company in July 2016.

The Board of Directors recommends a vote “FOR” the nominees set forth below.

Nominees for Group IIElection at the Annual Meeting for Three-Year Terms

Charles C. Brockett, 57, has served as a director of the Company since January 2017, when he also became President of the Company and the Bank. Mr. Brockett now serves solely as President of the Bank. See “Executive Officer Who is Not a Company Director.”

Prior to joining the Company, Mr. Brockett was Executive Vice President, Director of Operations at Eagle Bank. Mr. Brockett held this position beginning in November 2014 (following Eagle Bancorp’s completion of its acquisition of Virginia Heritage Bank) until May 2016. In this role, Mr. Brockett had direct oversight responsibility for all of the retail banking operations, deposit and loan operations, information technology, residential lending operations, marketing,

13

Russell Echlov,44,46, has served as a director of the Company and Bank since December 2018. Mr. Echlov iscurrently serves as a Partner and Founder of Ledyard Capital - an independent investment firm focused on opportunities at the intersection of the financial and technology sectors as well as other opportunities that arise from the rapidly evolving financial services landscape. Mr. Echlov was previously a Senior Portfolio Manager with Mendon Capital Advisors/RMB Capital. Mr. Echlov started his career as an associate at Mendon Capital Advisors Corp in 1997 and worked closely with founder Anton Schutz.1997. In 2001, Mr. Echlov left to gain experience with various investment strategies and worked with firms such as Keefe, Bruyette & Woods, FrontPoint Stadia, Columbia Financial Partners and Spring Hill Capital Partners, LLC. In 2017, Mr. Echlov returned to Mendon Capital Advisors who teamed up with RMB Capital to manage a financial services-focused US equity strategy. Today Mr. Echlov is a Portfolio Manager on Mendon’s domestic strategy and a Senior Portfolio Manager on Mendon Global.portfolio. Mr. Echlov earned his Bachelor’s degree in Modified Economics and Geography from Dartmouth College. Mr. Echlov served as a director of Independence Bancshares, Inc. from May 2015 until January 2018.

Summary of director qualifications for Mr. Echlov – Mr. Echlov brings vast industry knowledge working in his position as a Partner and Founder of Ledyard Capital and formerly as a Senior Portfolio Manager with Mendon Capital Advisors/RMB Capital. Mr. Echlov’s extensive background in analyzing investment opportunities and following performance across the financial industry for over 20 years has provided him with a strong depth of industry knowledge.

Darrell Green, 59,61, has served as a director of the Bank since 2013. In 2003,, Mr. Green established Darrell Green Enterprises, Inc., a marketing company that facilitates opportunities for Mr. Green and other athletes. After 20 years

15

Summary of director qualifications for Mr. Dick –Mr. Dick is aco-founder and organizer of the Bank. Mr. Dick has served as Chief Executive Officer of the Bank and the Company since their inception. He became the Chairman of the Board and Chair of the Executive Committee of the Bank in 2009 and also serves as Chairman of the Board of the Company. In his role as an Advisor to the Bank of England, he assisted in their efforts to modernize their risk-based approach to banking supervision. Mr. Dick gained valuable banking knowledge through his service as a director, Chief Lending Officer and Executive Vice President of another community bank. We believe that Mr. Dick’s careers in domestic and international risk-based banking supervision and in community banking, along with his education, have directly benefited his role as Chairman of the Board. In addition, Mr. Dick’s business background in the local community, as well as his involvement in civic organizations, hashave provided him with a strong depth of business contacts which continues to prove to be beneficial for the Bank.

Paul Thomas Haddock,,79,81, has served as a director of the Bank since 2003. Mr. Haddock is currently the President of Azure, Inc., a privately held company which he formed in 1984 to assistup-and-coming entrepreneurs and small businesses in developing and implementing effective business models. From 1981 to 1999, he created and managed

16

of Corporate Directors (NACD) with a Certificate in Cyber-Risk Oversight for Directors from NACD/Ridge Global/Carnegie Mellon University’s CERT Software Engineering Institute. Mr. Saeger has over 25 years of experience in technology, sales and management and is focused on building relationships to drive revenues, reduce costs, and improve processes to deliver value. He emphasizes integrity and open communication and brings to the Board a wealth of experience in organizational structure, planning, and forecasting.

Incumbent

17

Patsy I. Rust,77, has served as a director of the Bank since 2008. She was a Senior Vice President with the Bank from its inception until her retirement in September 2008. Prior to joining the Bank, Ms. Rust was involved in business development and management at Millennium Bank, N.A., BB&T, F&M Bank and Bank of the Potomac. Ms. Rust was also a founder and organizer for Bank of the Potomac, where she was responsible for personnel, facilities, marketing, operations and branch management. Ms. Rust has completed continuing education through the American Institute of Banking, the Virginia Bankers Association and the University of Virginia. Ms. Rust has been involved over the past 41 years in numerous civic and charitable organizations in Herndon, Virginia. She was the chairman of the first Herndon Centennial Celebration, Chairman of the Dranesville District Republican Party, received the Woman of the Year award from the Business and Professional Woman’s Club, organized and chaired Sister Cities International of Herndon and has held offices of President and Treasurer in other organizations.

Summary of director qualifications for Ms. Rust –Ms. Rust is a founding shareholder and organizer of the Bank. She joined the Board of the Bank in 2008 and currently serves as Chair of the Audit Committee. Prior to retiring from a30-year banking career in the Northern Virginia market, Ms. Rust was a major contributing organizer of two de novo community banks and also opened and managed two bank branches. Ms. Rust completed ongoing educational banking courses throughout her career. Ms. Rust was also the owner of a retail business prior to her banking career. Ms. Rust has been a civic leader in the community, and has been active in local charities. We believe Ms. Rust brings a very strong knowledge of branch banking and administrationSomalia. He moved to the Board, which is very importantUnited States in 1995. Mr. Hersiburane worked as thea Senior Financial Specialist and Financial Advisor with First Union Bank/Wachovia Bank continuesfrom 1996 to grow. Additionally, Ms. Rust brings a very strong banking product and service knowledge, which aids the2006. He joined MainStreet Bank in shaping its strategic direction. Ms. Rust continues to bring business opportunities to the Bank2007 as a Business Banker and is very activebecame head of Business Banking in networking with the Company’s employees.2015.

SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

For purposes of the following tables, beneficial ownership has been determined in accordance with Rule13d-3 of the Securities Exchange Act of 1934, as amended, under which, in general, a person is deemed to be the beneficial owner of a security if he or she has or shares the power to vote or direct the voting of the security or the power to dispose of or direct the disposition of the security, or if he or she has the right to acquire beneficial ownership of the security within 60 days of the record date. Except as otherwise noted, the nature of beneficial ownership for shares reported in this table is sole voting and investment power.

The following table sets forth information regarding the beneficial ownership, as of MayMarch 31, 2019,2021, of the Company’s common stock by:

(footnotes on following page)

14

18

Summary Compensation Table

19

Employment Agreements

The Company and the Bank havehas entered into employment agreements with ourthe Company’s Chief Executive Officer, Chief Financial Officer and President to secure their services in the highly competitive financial institution industry. The agreements are intended to balance each executive’s goals relative to the interests of the Company and its shareholders. The Company has guaranteed to make all payments of funds due and payable to each executive under the Agreement and to perform any and all financial obligations set forth therein to the extent that the Bank fails make such payments or perform such obligations.

20

If either Mr. Dick, Mr. Chmelik or Mr. Brockett is terminated “For Cause” (as defined in the Agreements) or terminates his employment other than “For Good Reason” (as defined in the Agreements), his compensation and benefits will cease upon termination, provided that the Bank will pay the executive any accrued but unpaid compensation, including any accrued unpaid annual bonus, which otherwise would have been payable to the executive through the date of termination.

21

The Committee may determine the type and terms and conditions of awards under the Equity Incentive Plan, which must be set forth in an award agreement delivered to each participant. Awards may be granted as incentive stock options,non-qualified stock options, restricted stock awards or any combination thereof, as follows:

22

DIRECTOR COMPENSATION

Our directors are not compensated separately by the Company but serve on the Board of Directors of and are compensated by the Bank. We do not anticipate paying separate compensation to the Company’s directors until such time as such persons devote significant time to the separate management of our affairs, which is not expected to occur unless we become actively engaged in additional businesses other than holding the stock of the Bank. We may determine that such compensation is appropriate in the future.

During 2018,2020, eachnon-employee director other than Mr. Echlov received fees in cash, Company common stock, or a combination of both at the director’s election. Director Echlov began receiving director compensation beginning on July 1, 2020. Directors who are also employed by the Company do not receive any additional compensation from the Company for their services as directors. Compensation for directors Dick, Brockett and Chmelik for their services as executive officers is set forth in the Summary Compensation Table.

Director Summary Compensation Table. The following table sets forth the compensation paid to ournon-employee directors for the fiscal year ended December 31, 2018.2020.

20

PROPOSAL TWO -

APPROVAL OF THE MAINSTREET BANCSHARES, INC.

2019 EQUITY INCENTIVE PLAN

The Board of Directors has adopted, subject to shareholder approval, the MainStreet Bancshares, Inc. 2019 Equity Incentive Plan (the “2019 Equity Incentive Plan”), to provide selected officers and employees and outside directors of the Company with additional incentives to promote the growth and performance of the Company. By approving the 2019 Equity Incentive Plan, our shareholders will provide us with additional flexibility to continue to attract, retain, incent and reward highly qualified personnel by offering a compensation program that is further linked to the performance of our common stock. The Board of Directors of the Company believes that the approval of the 2019 Equity Incentive Plan is in the best interests of the Company and its shareholders as such plan will provide the Company with shares of Company Common Stock to be used to further retain and reward and, to the extent necessary, attract and incentivize its employees, officers and outside directors to promote growth, improve performance and further align their interests with those of the Company’s shareholders through the ownership of additional Common Stock of the Company.

Why We Are Seeking Approval of the 2019 Equity Incentive Plan

The 2019 Equity Incentive Plan provides for the reservation and future award and issuance of up to 650,000 shares of Company Common Stock in accordance with the plan terms. The 2016 Equity Incentive Plan provided for the reservation of 210,000 shares of Company Common Stock of which all but 19,967 shares have been previously awarded to outside directors, officers and employees of the Company in lieu of cash compensation to directors and in lieu of cash bonuses to officers and employees. Upon approval of the 2019 Equity Incentive Plan, the unawarded shares under the 2016 Equity Incentive Plan will not be awarded in the future.

The Compensation Plan for the Company’s directors provides that directors may elect to receive their annual Board compensation in the form of cash or in the form of Company Common Stock based upon the market value of such stock at the time of the award. The Compensation Plan for the Company’s officers and employees provides that bonus recipients may elect to receive their incentive bonus compensation in the form of cash or in the form of Company Common Stock based upon the market value of such stock at the time of the award. The actual number of shares necessary for director compensation and officer and employee compensation are not known and may vary based upon a number of factors, including the future trading price for the Company’s Common Stock, the actual compensation for directors and the actual bonus awards for officers and employees.

The 2019 Equity Incentive Plan also permits the awards of Stock Options to Company directors, officers and employees. The Company has not awarded any Stock Options under the 2016 Equity Incentive Plan and the Board does not have any current intention to award any Stock Options under the 2019 Equity Incentive Plan, however, the plan provides the Board and the Compensation Committee with this additional flexibility if deemed appropriate in the future, subject to the limitations of the total shares of Common Stock reserved under the plan.

Highlights of the 2019 Equity Incentive Plan

21

The following summary of the material features of the 2019 Equity Incentive Plan is qualified in its entirety by reference to the provisions of the 2019 Equity Incentive Plan, attached hereto as Appendix A. In the event of a conflict between the terms of this summary and the terms of the 2019 Equity Incentive Plan, the terms of the 2019 Equity Incentive Plan will control. Capitalized terms not defined in the proxy statement will have such meaning as defined in the 2019 Equity Incentive Plan.

General

Subject to permitted adjustments for certain corporate transactions, the 2019 Equity Incentive Plan authorizes the issuance or delivery to participants of up to 650,000 shares of Company Common Stock pursuant to grants of incentive andnon-qualified stock options and restricted stock awards. These shares represent approximately 8% of the total number of shares of Common Stock presently outstanding. Upon the effective date of the 2019 Equity Incentive Plan, no new awards will be granted under the Company’s 2016 Equity Incentive Plan.

The 2019 Equity Incentive Plan will be administered by the members of the Compensation Committee (the “Committee”) who are “Disinterested Board Members,” as defined in the 2019 Equity Incentive Plan. The Committee has full and exclusive power within the limitations set forth in the 2019 Equity Incentive Plan to make all decisions and determinations regarding: (1) the selection of participants and the granting of awards; (2) establishing the terms and conditions relating to each award; (3) adopting rules, regulations and guidelines for carrying out the 2019 Equity Incentive Plan’s purposes; and (4) interpreting the provisions of the 2019 Equity Incentive Plan and any award agreement. The Compensation Committee has the authority to reduce, eliminate or accelerate any restrictions or vesting requirements applicable to an award at any time after the grant of the award or to extend the time period to exercise a stock option, provided that such extension is consistent with Section 409A of the Internal Revenue Code.

Eligibility

Each employee or outside director of the Company or any subsidiary is eligible to receive awards under the 2019 Equity Incentive Plan, except thatnon-employees may not be granted incentive stock options.

22

Types of Awards

The Committee may determine the type and terms and conditions of awards under the 2019 Equity Incentive Plan, which will be set forth in an award agreement delivered to each participant. Awards may be granted as incentive stock options andnon-qualified stock options, restricted stock awards or any combination thereof, as follows:

Stock Options. A stock option gives the recipient the right to purchase shares of Common Stock at a specified price for a specified period of time. The exercise price may not be less than the fair market value of the Company’s Common Stock on the date the stock option is granted. Fair market value for purposes of the 2019 Equity Incentive Plan means the final sales price of the Company’s Common Stock as reported on any national securities exchange on which the Common Stock may from time to time be listed or traded on the date the stock option is granted, or if the Company’s Common Stock was not traded on such date, then on the day prior to such date or on the next preceding day on which the Company’s Common Stock was traded, and without regard to after-hours trading activity. The Committee will determine the fair market value, in accordance with Section 422 of the Internal Revenue Code and applicable requirements of Section 409A of the Internal Revenue Code, if it cannot be determined in the manner described herein. Further, the Committee may not grant a stock option with an exercise term that is longer than 10 years.

Stock options are either “incentive” stock options or“non-qualified” stock options. Incentive stock options may have certain tax advantages for an employee’s benefit and must comply with the requirements of Section 422 of the Internal Revenue Code. Only employees are eligible to receive incentive stock options. Shares of Common Stock purchased upon the exercise of a stock option must be paid for in full at the time of exercise: (1) either in cash or with stock valued at Fair Market Value as of the day of exercise; (2) by a “cashless exercise” through a third party; (3) by a net settlement of the stock option using a portion of the shares obtained on exercise in payment of the exercise price of the stock option; (4) by personal, certified or cashier’s check; or (5) by a combination of the foregoing. Stock options are subject to vesting conditions and restrictions in accordance with the 2019 Equity Incentive Plan and as determined by the Committee.

Restricted Stock. A restricted stock award is a grant of Common Stock, subject to vesting requirements, to a participant for no monetary consideration or minimum consideration as may be required by applicable law. Restricted stock awards under the 2019 Equity Incentive Plan will be granted only in whole shares of Common Stock and are subject to vesting conditions and other restrictions established by the Committee as set forth in the 2019 Equity Incentive Plan or the award agreement. Awards will be evidenced by award agreements approved by the Committee, which set forth the terms and conditions of each award. Prior to their vesting, unless otherwise determined by the Committee, the recipient of a restricted stock award represented by issued and outstanding Common Stock issued in the name of the award recipient may exercise any voting rights with respect to such Common Stock. Unless the Committee determines otherwise, any dividends or distributions declared and paid with respect to shares subject to a restricted stock award will be distributed to the participant by the Company within 30 days of the respective dividend payment date, subject to applicable tax withholding; provided, that in the event of the forfeiture of such award, all future dividend rights shall cease.

In the event of a corporate transaction involving the stock of the Company (including, without limitation, any stock dividend, stock split or other special and nonrecurring dividend or distribution, recapitalization, reorganization, merger, consolidation,spin-off, combination or exchange of shares), the Committee will, in an equitable manner, adjust the number and kind of securities deemed to be available for grants of stock options, restricted stock awards, the number and kind of securities that may be delivered or deliverable with respect to outstanding stock options, restricted stock awards and the exercise price of stock options. In addition, the Committee is authorized to make adjustments to the terms and conditions of stock options and restricted stock awards not otherwise inconsistent with the terms of the 2019 Equity Incentive Plan.

Prohibition Against Repricing of Options. The 2019 Equity Incentive Plan provides that neither the Committee nor the Board is authorized to make any adjustment or amendment that reduces or would have the effect of reducing the exercise price of a Stock Option that has been previously granted, except for equitable adjustments noted above related to certain corporate transaction.

23

Prohibition on Transfer. Generally, all awards, exceptnon-qualified stock options, granted under the 2019 Equity Incentive Plan will be nontransferable except by will or in accordance with the laws of intestate succession. Restricted stock awards may be transferable pursuant to a qualified domestic relations order. At the Committee’s sole discretion,non-qualified stock options may be transferred for valid estate planning purposes that are permitted by the Internal Revenue Code and federal securities laws. During the life of the participant, awards can be exercised only by the participant. The Committee may permit a participant to designate a beneficiary to exercise or receive any rights that may exist under the 2019 Equity Incentive Plan upon the participant’s death.

Limitation on Awards under the 2019 Equity Incentive Plan

The following limits and restrictions apply to awards under the 2019 Equity Incentive Plan:

In the event of a corporate transaction involving the common stock of the Company (including, without limitation, any stock dividend, stock split, extraordinary cash dividend, recapitalization, reorganization, merger, consolidation,split-up,spin-off, combination or exchange of shares), the foregoing share limitations and all outstanding awards will automatically be adjusted proportionally and uniformly to reflect such event. Such adjustments are intended to preserve the benefits or potential benefits of the awards.

In addition, to the extent any shares of Company common stock covered by an award under the 2019 Equity Incentive Plan (including restricted stock awards) are not delivered to a participant or beneficiary because the award is forfeited or canceled or because the stock option is not exercised, prior to its expiration, then such shares will not be deemed to have been delivered for purposes of determining the maximum number of shares of common stock available for delivery under the 2019 Equity Incentive Plan.

24

Performance Based Features

Performance Measures. Upon the grant of an award, the Committee may establish the performance targets (other than being based solely on continuation of service) which must be met before such awards may begin to become first earned andnon-forfeitable or exercisable. Such performance targets may be expressed as a minimum threshold level and an optimum level, and each level of performance attainment may yield a specified number of stock options and/or restricted stock awards. The terms and conditions of any award, including any performance targets, if any, for each participant will be detailed in an award agreement. Except as otherwise provided herein, if such performance targets are not attained by the ending date of the performance period as specified in the applicable award agreement, then such award will be forfeited. Once such performance targets are attained, as certified by the Committee, such award will be deemed first earned andnon-forfeitable. Such performance targets may consist of Company financial metrics, peer group rankings based upon financial metrics, or such other criteria that may be established by the Committee as of the date of grant, except as otherwise modified thereafter by the Committee as permitted herein. Notwithstanding the foregoing, the Committee will have the authority to adjust or modify performance measures with respect to awards, including the authority to determine that awards will be earned without regard to whether such performance measures previously established have been satisfied and/or to authorize the implementation of a new performance period and performance measures and there-issuance of previously forfeited awards under the new program. The Committee will have sole discretion in determining how performance measures are calculated. If the Committee determines that a change in the business, operations, corporate structure or capital structure of the Company or the manner in which the Company conducts its business or other events or circumstances render current performance measures to be unsuitable, the Committee may modify such performance measures, in whole or in part, as the Committee deems appropriate. The Committee will certify in writing that any performance goals or other material terms applicable to an award were in fact satisfied, modified or waived, prior to such award first becoming earned andnon-forfeitable.

Vesting of Awards

Consistent with past practice, it is anticipated that restricted stock awards under the 2019 Equity Incentive Plan will be granted with a vesting rate equal toone-third of such award per year, with the first installment vesting on the one year anniversary of the date of grant, and succeeding installments vesting on each annual anniversary thereafter during periods of continued service by the award recipient until such award is fully earned. It is anticipated that an award of stock options under the 2019 Equity Incentive Plan will be granted with a vesting rate equal toone-third of such award per year, with the first installment vesting on the one year anniversary of the date of grant, and succeeding installments vesting on each annual anniversary thereafter during periods of continued service by the award recipient until such award is fully earned.

If the right to become vested in an award under the 2019 Equity Incentive Plan is conditioned on the completion of a specified period of service with the Company, without the achievement of performance measures or objectives, then unless otherwise determined by the Committee and evidenced in an award agreement, then the required period of service for full vesting will be determined by the Committee and evidenced in an award agreement, and may be subject to acceleration of vesting in the event of the death, disability or retirement of the participant or upon a Change in Control.

For a participant who is a director, termination of service as a director will not be deemed to have occurred if he or she continues as a director emeritus or advisory director. For a participant who is both an employee and a director, termination of employment as an employee will not be considered a termination event so long as the participant continues to provide service as a director, director emeritus or advisory director. The Committee may in its discretion elect to use a different vesting schedule or different performance measures set forth in the 2019 Equity Incentive Plan, provided that such terms are detailed in the participant’s award agreement.

Change in Control

Unless otherwise stated in an award agreement, upon a Change in Control, all stock options then held by the participant will become fully earned and exercisable (subject to the expiration provisions otherwise applicable to the stock option) and all awards of restricted stock will become fully earned and vested immediately. In the event of a Change in Control, any performance measures related to an award under the 2019 Equity Incentive Plan will be deemed satisfied as of the date of the Change in Control.

25

Amendment and Termination

The Board of Directors may, at any time, amend or terminate the 2019 Equity Incentive Plan or any award granted under the 2019 Equity Incentive Plan, provided that, except as provided in the 2019 Equity Incentive Plan, no amendment or termination may adversely impair the rights of a participant or beneficiary under an award without the participant’s (or affected beneficiary’s) written consent. The Board of Directors may not amend the 2019 Equity Incentive Plan to materially increase the benefits accruing to participants under the plan, materially increase the aggregate number of securities that may be issued under the 2019 Equity Incentive Plan (other than as provided in the 2019 Equity Incentive Plan), or materially modify the requirements for participation in the 2019 Equity Incentive Plan, without approval of shareholders. Notwithstanding the foregoing, the Committee may amend the 2019 Equity Incentive Plan or any award agreement, to take effect retroactively or otherwise, to conform the 2019 Equity Incentive Plan or the award agreement to current or future law or to avoid an accounting treatment resulting from an accounting pronouncement or interpretation issued by the SEC or Financial Accounting Standards Board subsequent to the adoption of the 2019 Equity Incentive Plan, or the making of the award affected thereby, which, in the sole discretion of the Committee, may materially and adversely affect the financial condition or results of operations of the Company.

Cash Payment in Lieu of Delivery of Shares.

Upon the exercise of a stock option, the Committee, in its sole and absolute discretion, may make a cash payment to the participant, in whole or in part, in lieu of the delivery of shares of Common Stock. Such cash payment to be paid in lieu of delivery of Common Stock shall be equal to the difference between the Fair Market Value of the Stock on the date of the stock option exercise and the exercise price per share of the stock option. Such cash payment shall be in exchange for the cancellation of such stock option. Such cash payment shall not be made in the event that such transaction would result in liability to the participant or the Company under Section 16(b) of the Securities Exchange Act and regulations promulgated thereunder, or subject the participant to additional tax liabilities related to such cash payments pursuant to Section 409A of the Internal Revenue Code. The Committee may, in its sole discretion, determine that upon a Change in Control of the Company each outstanding stock option shall be cancelled in exchange for a cash payment equal to the difference between the Fair Market Value of the shares of Common Stock on the date of the stock option cancellation and the Exercise Price per share of the stock option.

Duration of Plan

The 2019 Equity Incentive Plan will become effective upon approval by the shareholders at the 2019 Annual Meeting. The 2019 Equity Incentive Plan will remain in effect as long as any awards under it are outstanding; however, no awards may be granted under the 2019 Equity Incentive Plan on or after the day immediately prior to the10-year anniversary of its effective date. At any time, the Board of Directors may terminate the 2019 Equity Incentive Plan. However, any termination of the 2019 Equity Incentive Plan will not affect outstanding awards.

Federal Income Tax Considerations

The following is a summary of the federal income tax consequences that may arise in conjunction with participation in the 2019 Equity Incentive Plan.

Non-Qualified Stock Options. The grant of anon-qualified option will not result in taxable income to the participant. Except as described below, the participant will realize ordinary income at the time of option exercise in an amount equal to the excess of the fair market value of the shares acquired over the exercise price for those shares, and the Company will be entitled to a corresponding deduction for tax purposes. Gains or losses realized by the participant upon disposition of such shares will be treated as capital gains and losses, with the cost basis in such shares equal to the fair market value of the shares at the time of exercise.

26

Incentive Stock Options. The grant of an incentive stock option will not result in taxable income to the participant. The exercise of an incentive stock option also will not result in taxable income to the participant provided the participant was, without a break in service, an employee of the Company or a subsidiary during the period beginning on the date of the grant of the option and ending on the date three months prior to the date of exercise (one year prior to the date of exercise if the participant is disabled, as that term is defined in the Internal Revenue Code).

The excess of the fair market value of the shares at the time of the exercise of an incentive stock option over the exercise price is an adjustment that is included in the calculation of the participant’s alternative minimum taxable income for the tax year in which the incentive stock option is exercised. For purposes of determining the participant’s alternative minimum tax liability for the year of disposition of the shares acquired pursuant to the incentive stock option exercise, the participant will have a basis in those shares equal to the fair market value of the shares at the time of exercise.

If the participant does not sell or otherwise dispose of the shares within two years from the date of the grant of the incentive stock option or within one year after the exercise of such stock option, then, upon disposition of such shares, any amount realized in excess of the exercise price will be taxed as a capital gain. A capital loss will be recognized to the extent that the amount realized is less than the exercise price.

If the foregoing holding period requirements are not met, the participant will generally realize ordinary income at the time of the disposition of the shares, in an amount equal to the lesser of: (1) the excess of the fair market value of the shares on the date of exercise over the exercise price; or (2) the excess, if any, of the amount realized upon disposition of the shares over the exercise price, and the Company will be entitled to a corresponding deduction. If the amount realized exceeds the value of the shares on the date of exercise, any additional amount will be a capital gain. If the amount realized is less than the exercise price, the participant will recognize no income, and a capital loss will be recognized equal to the excess of the exercise price over the amount realized upon the disposition of the shares.

Restricted Stock. A participant who has been granted a restricted stock award will not realize taxable income at the time of grant, provided that the stock subject to the award is not delivered at the time of grant, or if the stock is delivered, it is subject to restrictions that constitute a “substantial risk of forfeiture” for federal income tax purposes. Upon the later of delivery or vesting of shares subject to an award, the holder will realize ordinary income in an amount equal to the then fair market value of those shares, and the Company will be entitled to a corresponding deduction for tax purposes. Gains or losses realized by the participant upon disposition of such shares will be treated as capital gains and losses, with the basis in such shares equal to the fair market value of the shares at the time of delivery or vesting. Dividends paid to the holder during the restriction period, if so provided, will be compensation income to the participant, and the Company will be entitled to a corresponding deduction for tax purposes. A participant who makes an election under Section 83(b) of the Internal Revenue Code will include the full fair market value of the restricted stock award in taxable income in the year of grant at the grant date fair market value.

Withholding of Taxes. The Company may withhold amounts from employee-participants to satisfy tax withholding requirements. Except as otherwise provided by the Committee, employee-participants may have shares withheld from awards to satisfy the minimum tax withholding requirements or an amount up to the participant’s highest marginal tax rate required for federal, state and local tax withholding, provided such withholding does not result in adverse accounting consequences to the Company.

Change in Control. Any acceleration of the vesting or payment of awards under the 2019 Equity Incentive Plan in the event of a change in control may cause part or all of the compensation involved to be treated as an “excess parachute payment” under Section 280G of the Internal Revenue Code, which may subject the participant to a 20% excise tax and preclude deduction for federal tax purposes by the Company related to the awards.

Deduction Limits. Section 162(m) of the Internal Revenue Code generally limits the ability to deduct for tax purposes compensation in excess of $1.0 million per calendar year for the chief executive officer, chief financial officer and other executive officers named in the summary compensation table (each, a “covered employee”) included in our annual meeting proxy statement, as well as any employee who has been designated a covered employee for any fiscal year beginning after December 31, 2016. Compensation resulting from awards under the 2019 Equity Incentive Plan will be counted toward the $1.0 million limit.

27

Tax Advice. The preceding discussion is based on federal tax laws and regulations currently in effect, which are subject to change, and the discussion does not purport to be a complete description of the federal income tax aspects of the 2019 Equity Incentive Plan. A participant may also be subject to state and local taxes in connection with the grant of awards under the 2019 Equity Incentive Plan. The Company suggests that participants consult with their individual tax advisors to determine the applicability of the tax rules to the awards granted to them in their personal circumstances.

Accounting Treatment

In accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 718, the Company is required to recognize compensation expense on its income statement over the requisite service period or performance period based on the grant date fair value of stock options and other equity-based compensation (such as restricted stock).

Possible Dilutive Effects of the 2019 Equity Incentive Plan.

The Common Stock to be issued upon the exercise of stock options awarded or the issuance of restricted stock awards under the 2019 Equity Incentive Plan may either be from authorized but unissued shares of Common Stock or shares purchased in the open market. In that the Company shareholders do not have preemptive rights, to the extent that the Company funds awards under the 2019 Equity Incentive Plan, in whole or in part, with authorized but unissued shares, the interests of then current shareholders may be diluted. If upon the delivery of shares of Common Stock for all awards, the Company delivers newly issued shares of Common Stock, or 650,000 shares of Common Stock, the dilutive effect to then current shareholders would be approximately 7.4%. The Company can avoid dilution resulting from the awards under the plan by delivering shares purchased in the open market to fund plan awards.

Clawback Policy

The 2019 Equity Incentive Plan provides that if the Company is required to prepare an accounting restatement due to its material noncompliance, as a result of misconduct, with any financial reporting requirement under the federal securities laws, any participant who is subject to automatic forfeiture under Section 304 of the Sarbanes-Oxley Act of 2002 or who is subject to clawback under Section 954 of the Dodd-Frank Act must reimburse the Company with the required amount of any payment in settlement of an award earned or accrued during the12-month period following the first public issuance or filing with the SEC (whichever first occurred) of the financial document embodying such financial reporting requirement. In addition, awards granted under the 2019 Equity Incentive Plan are subject to any clawback policy adopted by the Board of Directors from time to time, even if adopted after the date of grant of such Awards.

New Benefits Table: Awards to be Granted.

The Board of Directors has adopted the 2019 Equity Incentive Plan. If the 2019 Equity Incentive Plan is approved by shareholders, the Compensation Committee intends to continue permitting Outside Directors to elect to receive all or a portion of Board compensation in the form of Company Common Stock and awarding bonus compensation to Company officers and employees in the form of 50% cash and 50% Company Common Stock and within its discretion up to 100% in the form of Company Common Stock. The Compensation Committee has no present intention to make awards of stock options to Outside Directors or officers or employees. Any future grants of awards to officers, employees and directors under the 2019 Equity Incentive Plan will be determined in the discretion of the Compensation Committee.

Required Vote and Recommendation of the Board

In order to approve the 2019 Equity Incentive Plan, the proposal must receive an affirmative vote of a majority of the votes cast in person or by proxy at a meeting of shareholders of the Company. Votes to Abstain and BrokerNo-Votes will have no impact on the outcome of the voting.

In the event at the time of the Annual Meeting there are not sufficient votes to approve the 2019 Equity Incentive Plan, the Annual Meeting may be adjourned in order to permit the further solicitation of proxies.

28

THE BOARD OF DIRECTORS RECOMMENDS THAT SHAREHOLDERS VOTE “FOR” THE APPROVAL OF THE 2019 EQUITY INCENTIVE PLAN

Securities Authorized for Issuance Under Equity Compensation Plans.

The following table provides information concerning securities authorized for issuance under equity compensation plans, the weighted average price of such securities and the number of securities remaining available for future issuance, as of December 31, 2018.

PROPOSAL THREE -

RATIFICATION OF APPOINTMENT OF INDEPENDENT

REGISTERED PUBLIC ACCOUNTING FIRM

The Audit Committee has appointed YHB as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2019,2021, subject to shareholder ratification at the Annual Meeting. YHB also served as independent auditor for the fiscal year ended December 31, 2018.2020. In the event that the appointment of YHB is not ratified by shareholders at the Annual Meeting, the Audit Committee will consider making a change in the independent auditorregistered public accounting firm for 2019.2021.

Representatives of YHB are expected to be present at the Annual Meeting, will have the opportunity to make a statement if they desire to do so and are expected to be available to respond to any appropriate questions.

25

As to ratification of the independent auditors,registered public accounting firm, the proxy card being furnished by the Board of Directors enables a shareholder to: (i) vote “FOR” the proposal; (ii) vote “AGAINST” the proposal; or (iii) “ABSTAIN” from voting on the proposal. Ratification of the independent public accounting firm must be approved by the affirmative vote of a majority of the shares voted at the Annual Meeting, without regard to brokernon-votes or proxies marked “ABSTAIN.”

Audit Fees and Other Matters

The following table presents the fees for professional audit services rendered by YHB for the audit of the Company’s annual financial statement for the years ended December 31, 20182020 and 2017,2019, and fees billed for other services rendered by YHB during those periods. All such audit andnon-audit services werepre-approved by the Audit Committee, which concluded that the provision of such services by YHB was compatible with the maintenance of that firm’s independence in the conduct of their auditing functions.

YHB did not provide any services related to the financial information systems design and implementation to the Company or the Bank during 20172020 and 2018.2019.

Audit Fees

Audit fees consist of audit and review services, consents, and review of documents filed with the SEC.

Audit-Related Fees

Audit-related fees for 2017 consistin 2020 consisted of feesHUD audits, review of documents filed with the SEC, and consultation concerning financial accounting, reporting standards and other related to the Company’s private placement stock offering.issues. Audit-related fees for 2018 consist2019 consisted of fees related to the Company’s private placement stock offering; HUD audits; Form 10 Registration Statement;audits and consultation concerning financial accounting, reporting standards and other related issues.

Tax Fees

Tax fees consist of preparation of federal and state tax returns;returns, reviews of quarterly estimated tax payments and consultations regarding tax compliance issues.

26

AUDIT COMMITTEE REPORT

The Audit Committee has issued a report that states as follows:

Based on the review and discussions referred to above, the Audit Committee recommended to the Board of Directors that the audited consolidated financial statements be included in our Registration StatementAnnual Report on Form 1010-K for filing with the Securities and Exchange Commission.

This report shall not be deemed incorporated by reference by any general statement incorporating by reference this proxy statement into any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, except to the extent that MainStreet Bancshares, Inc. specifically incorporates this information by reference, and shall not otherwise be deemed filed under such Acts.

This report has been provided by the Audit Committee:

Patsy I. Rust (Chair)

Elizabeth S. Bennett

Paul Thomas Haddock

Terry M. Saeger

27

SHAREHOLDER PROPOSALS

The Board of Directors expects that the Company’s 20202022 Annual Meeting of Shareholders (the “2020“2022 Annual Meeting”) will be held on or about May 20, 2020, a date more than 30 days prior to the anniversary date of the Annual Meeting.18, 2022.

Pursuant to Rule14a-8 under the Securities Exchange Act of 1934, a shareholder intending to present a proposal to be included in the proxy statement for the 2020 Annual Meeting must deliver the proposal in writing to the principal executive office of the Company no later than a reasonable time before we begin to print and mail the proxy materials for the 2020 Annual Meeting. Accordingly, theThe deadline for submission of proposals to be included in our proxy materials for the 20202022 Annual Meeting is December 22, 2019.14, 2021. Proposals should be addressed to: Corporate Secretary, MainStreet Bancshares, Inc., 10089 Fairfax Boulevard, Fairfax, Virginia 22030. Shareholders must also comply with applicable rules of the Securities and Exchange Commission (“SEC”)SEC regarding the inclusion of proposals in proxy materials, and we may omit any proposal from our proxy materials that does not comply with the SEC’s rules. If the date of the 2020 Annual Meeting is changed by more than 30 days from May 20, 2020, any shareholder proposal must be received at another reasonable time before we print or mail proxy materials for such meeting.

In order to be considered at our 20202022 Annual Meeting, but not included in our proxy materials, a shareholder nomination for director or proposal to take action at such meeting must be received by the Corporate Secretary of the Company at the principal executive office of the Company by no later than the close of business on the 120th120^th calendar day prior to the first anniversary of the preceding year’s annual meeting date;date, or January 20, 2021; provided however, that in the event the date of the annual meeting is more than 30 calendar days before or after such anniversary date, notice by the shareholder will considered timely if it is delivered by the close of business on the 10th10^th calendar day following the day on which notice of the date of the annual meeting was first mailed or public announcement of the date of the annual meeting was first made, whichever occurs first. Any such proposal shall be subject to the requirements of the proxy rules adopted under the Securities Exchange Act of 1934.1934, as amended.

Pursuant to our Bylaws, such shareholder’s notice shall set forth as to each matter such shareholder proposes to bring before the annual meeting: (1) a brief description of the business desired to be brought before the annual meeting, including the text of the proposal or business, and the reasons for conducting such business at the annual meeting, and (2) as to the shareholder giving such notice and the beneficial owner, if any, on whose behalf the nomination or proposal is made, (A) the name and address of such shareholder, as they appear on the Company’s stock transfer books, and of such beneficial owner, (B) the class or series and number of shares of capital stock of the Company that are owned beneficially and of record by such shareholder and such beneficial owner, (C) a description of all arrangements or understandings between such shareholder or beneficial owner and any interest of such shareholder or beneficial owner, if any, in such business, (D) a representation that such shareholder is a holder of record of stock of the Company entitled

28

Nothing in this proxy statement shall be deemed to require us to include in our proxy statement and proxy relating to an annual meeting any shareholder proposal that does not meet all of the requirements for inclusion established by the SEC in effect at the time such proposal is received.

OTHER MATTERS

The Board of Directors is not aware of any business to come before the Annual Meeting other than those matters described above in this Proxy Statement and matters incident to the conduct of the Annual Meeting. Properly executed proxies in the accompanying form that have not been revoked confer discretionary authority on the persons named therein to vote at the direction of a majority of the Board of Directors with respect to matters incident to the conduct of the Annual Meeting and with respect to any other matter presented to the Annual Meeting if notice of such matter has not been delivered to the Company in accordance with the Articles of Incorporation and Bylaws, which provide an advance notice procedure for certain business to be brought before an annual meeting of shareholders. If a shareholder notifies the Company of such shareholder’s intent to present a proposal at the Annual Meeting not in accordance with such procedures, the persons named in the accompanying proxy may exercise discretionary voting authority, as determined by a majority of the Board of Directors, if the proposal is raised at the Annual Meeting without any discussion of the matter in this Proxy Statement.

The cost of solicitation of proxies will be borne by the Company. The Company will reimburse brokerage firms and other custodians, nominees and fiduciaries for reasonable expenses incurred by them in sending proxy material to the beneficial owners of Common Stock.common stock. In addition to solicitations by mail, directors, officers and regular employees of the Company and the Bank may solicit proxies personally, by telegraph or telephone without additional compensation.

The Company has retained Equiniti Services LLC (“EQ”) to aid in the solicitation of proxies. EQ will receive a base fee not to exceed $5,000, plus certain incremental costs for its proxy solicitation services.

BY ORDER OF THE BOARD OF DIRECTORS

Thomas J. Chmelik

Secretary

Fairfax, Virginia

June 14, 2019April 13, 2021

ANNUAL REPORT ON FORM 10-K

A COPY OF OUR ANNUAL REPORT ON FORM 10-K FOR THE YEAR ENDED DECEMBER 31, 2020, ACCOMPANIES THIS PROXY STATEMENT, SUCH REPORT IS NOT PART OF THE PROXY SOLICITATION MATERIALS.

3329

Section 2.2    Stock Options.

(a)     Grant of Stock Options. Each Stock Option shall be evidenced by an Award Agreement that shall: (i) specify the number of Stock Options covered by the Award; (ii) specify the date of grant of the Stock Option; (iii) detail the Exercise Price of such Stock Options; (iv) specify the vesting period or conditions to vesting; and (iv) contain such other terms and conditions not inconsistent with the Plan, including the effect of termination of a Participant’s employment or Service with the Company as the Committee may, in its discretion, prescribe.

(b)    Terms and Conditions. A Stock Option shall be exercisable in accordance with such terms and conditions and during such periods as may be established by the Committee. In no event, however, shall a Stock Option expire later than ten (10) years after the date of its grant (or five years with respect to ISOs granted to an Employee who is a 10% Shareholder). The “Exercise Price” of each Stock Option shall not be less than 100% of the Fair Market Value of a share of Stock on the date of grant (or, if greater, the par value of a share of Stock);provided, however,that the Exercise Price of an ISO shall not be less than 110% of Fair Market Value of a share of Stock on the date of grant if granted to a 10% Shareholder; provided further, that the Exercise Price may be higher or lower in the case of Stock Options exchanged in replacement of existing Awards held by an Employee, Director, Advisory Director or other service provider to an acquired entity.

(c)     Method of Exercise. Subject to the other terms and conditions hereof, a Participant may exercise any Stock Option, to the extent such Stock Option is vested, by giving written notice of exercise to the Company, provided, however, that in no event shall a Stock Option be exercisable for a fractional share. The date of exercise of a Stock Option shall be the later of: (i) the date on which the Company receives such written notice; and (ii) the date on which the Participant pays the applicable Exercise Price pursuant to this Section 2.2(c). The payment of the Exercise Price upon the exercise of a Stock Option shall be by cash or, subject to limitations imposed by applicable law, by such other means as the Committee may from time to time permit, including: (i) by tendering, either actually or constructively by attestation, shares of Stock otherwise owned by the Stock Option holder valued at Fair Market Value as of the day of exercise; (ii) by irrevocably authorizing a third party, acceptable to the Committee, to sell shares of Stock (or a sufficient portion of the shares) acquired upon exercise of the Stock Option and to remit to the Company a sufficient portion of the sale proceeds to pay the entire Exercise Price and any tax withholding resulting from such exercise; (iii) other than in the case of Stock Options granted as ISOs, by a net settlement of the Stock Option, using a portion of the shares of Stock obtained on exercise in payment of the Exercise Price of the Stock Option (and if applicable, any required tax withholding, to the extent permitted under the Plan); (iv) by personal, certified or cashier’s check; or (v) by any combination thereof. The total number of shares of Stock that may be acquired upon the exercise of a Stock Option shall be rounded down to the nearest whole share, withcash-in-lieu paid by the Company, at its discretion, for the value of any fractional share.

(c)    Other Limitations Applicable to ISO Awards. To the extent the aggregate Fair Market Value of shares of Stock with respect to which ISO Options are exercisable for the first time by an Employee during any calendar year, under the Plan or any other stock option plan of the Company or any Subsidiary, exceeds $100,000, or such higher value as may be permitted under Code Section 422, such ISO Options in excess of the $100,000 limit shall be treated asNon-Qualified Stock Options. Fair Market Value shall be determined as of the grant date for each ISO.

(d)     Prohibition of CashBuy-Outs of Underwater Stock Options. Under no circumstances will any Stock Options which were granted under the Plan be bought back by the Company at a time when the Exercise Price of such Stock Options is greater than the Fair Market Value of the Stock on the date of the purchase transaction without shareholder approval of such transaction.

Section 2.3    Restricted Stock Awards.

(a)    Grant of Restricted Stock Awards. Each Restricted Stock Award shall be evidenced by an Award Agreement that shall: (i) specify the number of shares of Stock covered by the Restricted Stock Award; (ii) specify the date of grant of the Restricted Stock Award; (iii) specify the vesting period; and (iv) contain such other terms and conditions not inconsistent with the Plan, including the effect of termination of a Participant’s employment or Service with the Company, as the Committee may, in its discretion, prescribe. All Restricted Stock Awards shall be in the form of issued and outstanding shares of Stock that, at the discretion of the Committee, shall be either: (x) registered in the name of the Participant and held by the Company or on behalf of the Company, together with a stock power executed

A-2

by the Participant in favor of the Company, pending the vesting or forfeiture of the Restricted Stock Award; or (y) registered in the name of, and delivered to, the Participant. In any event, the certificates evidencing the Restricted Stock Award shall at all times prior to the applicable vesting date bear the following legend:

The Stock evidenced hereby is subject to the terms of an Award Agreement with MainStreet Bancshares, Inc., dated [Date], made pursuant to the terms of the MainStreet Bancshares, Inc. 2019 Equity Incentive Plan, copies of which are on file at the executive offices of MainStreet Bancshares, Inc., and may not be sold, encumbered, hypothecated or otherwise transferred except in accordance with the terms of such Plan and Award Agreement, or such other restrictive legend as the Committee, in its discretion, may specify.

Notwithstanding the foregoing, the Company may in its sole discretion issue a Restricted Stock Award in any other approved format (e.g., electronically) in order to facilitate the paperless transfer of such Awards. In the event a Restricted Stock Award is not issued in certificate form, the Company and the transfer agent shall maintain appropriate bookkeeping entries that evidence Participants’ ownership of such Awards. A Restricted Stock Award that is not issued in certificate form shall be subject to the same terms and conditions of the Plan as certificated shares, including the restrictions on transferability and the provision of a stock power executed by the Participant in favor of the Company, until the satisfaction of the conditions to which the Restricted Stock Award is subject. Notwithstanding anything herein to the contrary, the Committee shall distribute to a Participant the Stock vested in accordance with a Restricted Stock Award, or portion thereof, within thirty days following the date of such vesting.

(b)    Terms and Conditions.Each Restricted Stock Award shall be subject to the following terms and conditions:

(i)    Dividends.Unless the Committee determines otherwise with respect to any Restricted Stock Award and specifies such determination in the relevant Award Agreement, any dividends or distributions declared and paid with respect to shares of Stock subject to the Restricted Stock Award, other than a stock dividend consisting of shares of Stock, shall be distributed to the Participant by the Company within thirty days of the respective dividend payment date, subject to applicable tax withholding; provided that in the event of the forfeiture of such Restricted Stock Award, all future dividend rights shall cease. Any stock dividends declared on shares of Stock subject to a Restricted Stock Award shall be subject to the same restrictions and shall vest at the same time as the shares of Stock underlying such Restricted Stock Award from which said dividends were derived.

(ii)    Voting Rights.Unless the Committee determines otherwise with respect to any Restricted Stock Award and specifies such determination in the relevant Award Agreement, voting rights applicable to the shares of Stock subject to the Restricted Stock Award may be exercised by the Participant prior to the date that such Restricted Stock Award is deemed earned andnon-forfeitable.

(iii)    Tender Offers and Merger Elections.Each Participant to whom a Restricted Stock Award is granted shall have the right to respond, or to direct the response, with respect to the related shares of Restricted Stock, to any tender offer, exchange offer, cash/stock merger consideration election or other offer made to, or elections made by, the holders of shares of Restricted Stock. Such a direction for any such shares of Stock shall be given by proxy or ballot (if the Participant is the beneficial owner of the shares of Restricted Stock for voting purposes) or by completing and filing, with the inspector of elections, the trustee or such other person who shall be independent of the Company as the Committee shall designate in the direction (if the Participant is not such a beneficial owner), a written direction in the form and manner prescribed by the Committee. If no such direction is given, then the shares of Restricted Stock shall not be tendered.

(iv)    Other Matters. The conditions for granting or vesting and the other provisions of Restricted Stock Awards need not be the same with respect to each recipient.

(c)    Stock Awards in lieu of Cash Compensation Payments. Subject to the limitations on Restricted Stock Awards as set forth at Sections 2.3 and 3.2 herein, as of and after the Effective Date, an Eligible Participant may receive a Restricted Stock Award in lieu of cash compensation as a bonus payment to officers or employees or as director compensation with such Restricted Stock Award calculated based the full value of such anticipated payment and the Fair Market Value of the Stock at the time of such payment. Such Restricted Stock Awards may include such

A-3

additional terms and conditions as determined by the Compensation Committee at the time of such Award. In addition, Directors of the Company and the Bank may elect in accordance with procedures established by the Compensation Committee to receive payment of any annual retainer or monthly board fees in the form of a Restricted Stock Award valued at the Fair Market Value of the Stock at the time of such payment in lieu of such cash payment. Unless otherwise inapplicable, or inconsistent with the provisions of this paragraph, the Restricted Stock Awards to be granted hereunder shall be subject to all other applicable provisions of this Plan.

Section 2.4Performance-Based Compensation.

(a)    Upon the grant of an Award, the Committee may establish the performance targets, if any, which must be met before such Awards may begin to become first earned andnon-forfeitable or exercisable. Such performance targets may be expressed as a minimum threshold level and an optimum level, and each level of performance attainment may yield a specified number of Stock Options and/or Restricted Stock Awards. The terms and conditions of any Award, including any performance targets, if any, for each Participant shall be detailed in an Award Agreement. Except as otherwise provided herein, if such performance targets are not attained by the ending date of the performance period as specified in the applicable Award Agreement, then such Award shall be forfeited. Once such performance targets are attained, as certified by the Committee, such Award shall be deemed first earned andnon-forfeitable. Such performance targets may consist of Company financial metrics, peer group rankings based upon financial metrics, or such other criteria that may be established by the Committee as of the date of grant, except as otherwise modified thereafter by the Committee as permitted herein. Notwithstanding the foregoing, the Committee shall have the authority to adjust or modify performance measures with respect to Awards, including the authority to determine that Awards shall be earned without regard to whether such performance measures previously established have been satisfied and/or to authorize the implementation of a new performance period and performance measures and there-issuance of previously forfeited awards under the new program.

(b)    The Committee shall have sole discretion in determining how performance measures are calculated. If the Committee determines that a change in the business, operations, corporate structure or capital structure of the Company or the manner in which the Company or its Subsidiary conducts its business or other events or circumstances render current performance measures to be unsuitable, the Committee may modify such performance measures, in whole or in part, as the Committee deems appropriate. The Committee shall certify in writing that any performance goals or other material terms applicable to an Award were in fact satisfied, or modified or waived, prior to such Award first becoming earned andnon-forfeitable or exercisable.

Section 2.5Vesting of Awards.

(a)    The Committee shall specify the vesting schedule and other conditions of each Award. Unless otherwise specified by the Committee and set forth in an Award Agreement between the Company and the Participant, Awards to Employees and Outside Directors under the Plan shall be granted with a vesting rate equal toone-third of such Award per year, with the first installment vesting on the one year anniversary of the date of grant, and succeeding installments vesting on each annual anniversary thereafter during periods of continued service by the Award recipient until such Award is fully earned. If the right to become vested in an Award under the Plan (including the right to exercise a Stock Option) is conditioned on the completion of a specified period of Service with the Company or its Subsidiaries, without achievement of performance measures or other performance objectives being required as a condition of vesting, and without it being granted in lieu of, or in exchange for, other compensation, then the required period of Service for full vesting shall be determined by the Committee and evidenced in the Award Agreement (subject to acceleration of vesting, to the extent permitted by the Committee, including in the event of the Participant’s death, Disability or Retirement or upon a Change in Control). Unless otherwise provided by the Committee, Service as a director emeritus, advisory director or consultant shall constitute continued Service for purposes of vesting.

(b)    Notwithstanding Section 2.8 and Article 4 hereof, unless otherwise prohibited by applicable law or regulation, the Committee may, in its sole discretion, determine that all Stock Options then held by a Participant shall become fully exercisable (subject to the expiration provisions otherwise applicable to the Stock Option) and all Restricted Stock Awards shall be fully earned and vested immediately.

A-4

Section 2.6Deferred Compensation. If any Award would be considered “deferred compensation” as defined under Code Section 409A (“Deferred Compensation”), the Committee reserves the absolute right to unilaterally amend the Plan or the Award Agreement, without the consent of the Participant, to maintain exemption from, or to comply with, Code Section 409A. Any amendment by the Committee to the Plan or an Award Agreement pursuant to this Section 2.6 shall maintain, to the extent practicable, the original intent of the applicable provision without violating Code Section 409A. A Participant’s acceptance of any Award under the Plan constitutes acknowledgement and consent to such rights of the Committee, without further consideration or action. Any discretionary authority retained by the Committee pursuant to the terms of this Plan or pursuant to an Award Agreement shall not be applicable to an Award which is determined to constitute Deferred Compensation, if such discretionary authority would contravene Code Section 409A.

Section 2.7Prohibition Against Option Repricing. Except for adjustments pursuant to Section 3.3, and reductions of the Exercise Price approved by the Company’s shareholders, neither the Committee nor the Board shall have the right or authority to make any adjustment or amendment that reduces or would have the effect of reducing the Exercise Price of a Stock Option previously granted under the Plan, whether through amendment, cancellation (including cancellation in exchange for a cash payment in excess of the Stock Option’sin-the-money value or in exchange for Stock Options or other Awards) or replacement grants, or other means.

Section 2.8.Effect of Termination of Service on Awards.The Committee shall establish the effect of a Termination of Service on the continuation of rights and benefits available under an Award or the Plan and, in so doing, may make distinctions based upon, among other things, the reason for Termination of Service and type of Award. Unless otherwise specified by the Committee and set forth in an Award Agreement between the Company and the Participant, the following provisions shall apply to each Award granted under this Plan:

(a)    Upon a Participant’s Termination of Service for any reason other than due to Disability, death, Retirement or Termination for Cause, Stock Options shall be exercisable only as to those shares that were immediately exercisable by such Participant at the date of Termination of Service, and Stock Options may be exercised only for a period of three (3) months following Termination of Service and any Restricted Stock Award that has not vested as of the date of Termination of Service shall expire and be forfeited.

(b)    In the event of a Termination of Service for Cause, all Stock Options granted to a Participant that have not been exercised and all Restricted Stock Awards granted to a Participant that have not vested as of such date of Termination of Service for Cause shall expire and be forfeited.

(c)    Upon Termination of Service for reasons of Disability or death or, to the extent permitted by the Committee, Retirement, (i) all Stock Options shall be exercisable as to all shares of Stock subject to an outstanding Award, whether or not then exercisable, and (ii) all Restricted Stock Awards which have not yet become earned andnon-forfeitable, shall, in each case, be deemed earned and be exercisable as if the Participant had Terminated Service as of the date of the final vesting event applicable to each outstanding Award. Stock Options may be exercised for a period of one year following Termination of Service due to death, Disability or Retirement;provided, however, that no Stock Option shall be eligible for treatment as an ISO in the event such Stock Option is exercised more than three months following Termination of Service due to Retirement, andprovided, further, in order to obtain ISO treatment for Stock Options exercised by heirs or devisees of the Participant, the Participant’s death must have occurred while employed or within three months of Termination of Service.

(d)    Notwithstanding anything herein to the contrary, no Stock Option shall be exercisable beyond the last day of the original term of such Stock Option.

(e)    Notwithstanding the provisions of this Section 2.8, the effect of a Change in Control on the vesting and exercisability of Stock Options and Restricted Stock Awards is as set forth in Article 4.

ARTICLE 3 - SHARES SUBJECT TO PLAN

Section 3.1Available Shares. The shares of Stock with respect to which Awards may be made under the Plan shall be from authorized but unissued shares of Stock, Stock currently held as treasury shares or, to the extent permitted by applicable law, Stock subsequently acquired by the Company as treasury shares, including shares of Stock purchased in the open market or in private transactions.

A-5

Section 3.2Share Limitations.

(a)    Share Reserve. Subject to the following provisions of this Section 3.2, the maximum number of shares of Stock that may be delivered to Participants and their beneficiaries under the Plan shall be equal toSix-Hundred and Fifty Thousand (650,000) shares of Stock in the aggregate. The maximum number of shares of Stock that may be delivered pursuant to the exercise of Stock Options (all of which may be granted as ISOs,Non-Qualified Stock Options or a combination of each) isSix-Hundred and Fifty Thousand (650,000) shares of Stock, reduced by any shares of Stock issued as Restricted Stock Awards. The maximum number of shares of Stock that may be issued as Restricted Stock Awards isSix-Hundred and Fifty Thousand (650,000) shares of Stock, reduced by any shares of Stock issued upon the exercise of Stock Options. The aggregate number of shares of Stock available for grant under this Plan and the number of shares of Stock subject to outstanding Awards shall be subject to adjustment as provided in Section 3.3.

(b)    Limitations on Awards.

(i)    Total shares of Stock issuable to Outside Directors under the Plan shall not exceed 25% of the total shares of Stock authorized for issuance under the Plan in the aggregate (i.e., 162,500 shares). The maximum number of shares of Stock related to the award ofNon-Qualified Stock Options and Restricted Stock Awards in any calendar year to any individual Outside Director shall not exceed 3,000 shares of Stock in the aggregate.

(ii)    Total shares of Stock issuable to Employees under the Plan shall not exceed 650,000 shares of Stock in the aggregate, reduced by the aggregate of shares of Stock issued to Outside Directors. The maximum number of shares of Stock issuable to any individual Employee under the Plan shall not exceed 15% of the total shares of Stock authorized for issuance under the Plan in the aggregate (i.e., 97,500 shares), and the maximum number of shares of Stock related to the award of Stock Options (all of which may be granted as ISOs,Non-Qualified Stock Options or a combination of each) or Restricted Stock Awards in any calendar year to any individual Employee shall not exceed the number of shares calculated as the quotient of the Employee’s base salary in effect as of the first business day of such calendar year divided by the Fair Market Value of such Stock on such date.

(c)    Computation of Shares Available.For purposes of this Section 3.2, and in connection with the granting of Stock Options and Restricted Stock Awards, the number of shares of Stock available for the granting of additional Stock Options and Restricted Stock Awards shall be reduced by the number of shares of Stock issued with respect to such Awards. To the extent any shares of Stock covered by an Award (including Restricted Stock Awards) under the Plan are not delivered to a Participant or beneficiary for any reason, including because the Award is forfeited or canceled or because a Stock Option is not exercised prior to its expiration, then such shares shall not be deemed to have been delivered for purposes of determining the maximum number of shares of Stock available for delivery under the Plan. To the extent (i) a Stock Option is exercised by using an actual or constructive exchange of shares of Stock to pay the Exercise Price, (ii) shares of Stock are withheld to satisfy withholding taxes upon exercise or vesting of an Award granted hereunder, or (iii) shares are withheld to satisfy the exercise price of Stock Options in a net settlement of Stock Options, then the number of shares of Stock available shall be reduced by the gross number of Stock Options exercised or Awards earned, rather than by the net number of shares of Stock issued.

Section 3.3    Corporate Transactions.

(a)    General.In the event any recapitalization, forward or reverse stock split, reorganization, merger, consolidation,spin-off, combination, repurchase, or exchange of shares of Stock or other securities, stock dividend or other special and nonrecurring dividend or distribution (whether in the form of cash, securities or other property), liquidation, dissolution, or other similar corporate transaction or event, affects the shares of Stock such that an adjustment is appropriate in order to prevent dilution or enlargement of the rights of Participants under the Plan and/or under any Award granted under the Plan, then the Committee shall, in an equitable manner, adjust any or all of (i) the number and kind of securities deemed to be available thereafter for grants of Stock Options and Restricted Stock Awards in the aggregate to all Participants and individually to any one Participant, (ii) the number and kind of securities that may be delivered or deliverable in respect of outstanding Stock Options and Restricted Stock Awards, and (iii) the Exercise Price of Stock Options. In addition, the Committee is authorized to make adjustments in the terms and conditions of, and the criteria included in, Stock Options and Restricted Stock Awards (including, without limitation, cancellation of Stock Options and Restricted Stock Awards in exchange for thein-the-money value, if any,

A-6

of the vested portion thereof, or substitution or exchange of Stock Options and Restricted Stock Awards using stock of a successor or other entity) in recognition of unusual or nonrecurring events (including, without limitation, events described in the preceding sentence) affecting the Company or any parent or Subsidiary, or the financial statements of the Company or any parent or Subsidiary, or in response to changes in applicable laws, regulations, or accounting principles.

(b)    Merger in which the Company is Not Surviving Entity.In the event of any merger, consolidation, or other business reorganization (including, but not limited to, a Change in Control) in which the Company is not the surviving entity, unless otherwise determined by the Committee at any time at or after grant and prior to the consummation of such merger, consolidation or other business reorganization, any Stock Options granted under the Plan which remain outstanding shall be converted into Stock Options to purchase voting common equity securities of the business entity which survives such merger, consolidation or other business reorganization having substantially the same terms and conditions as the outstanding Stock Options under this Plan and reflecting the same economic benefit (as measured by the difference between the aggregate Exercise Price and the value exchanged for outstanding shares of Stock in such merger, consolidation or other business reorganization), all as determined by the Committee prior to the consummation of such merger; provided, however, that the Committee may, in its sole discretion, at any time prior to the consummation of such merger, consolidation or other business reorganization, direct that all, but not less than all, outstanding Stock Options be canceled as of the effective date of such merger, consolidation or other business reorganization in exchange for a cash payment per share of Stock equal to the excess (if any) of the value exchanged for an outstanding share of Stock in such merger, consolidation or other business reorganization over the Exercise Price of the Stock Option being canceled; provided, further, that in the event the Exercise Price of outstanding Stock Options exceed the value to be exchanged for an outstanding share of Stock (an “Underwater Stock Option”) in such merger, consolidation or other business reorganization, the Committee may, in its discretion, cancel and terminate such Underwater Stock Options without the consent of the holder of the Stock Option and without any payment to such holder.

Section 3.4Delivery of Shares. Delivery of shares of Stock or other amounts under the Plan shall be subject to the following:

(a)    Compliance with Applicable Laws.Notwithstanding any other provision of the Plan, the Company shall have no obligation to deliver any shares of Stock or make any other distribution of benefits under the Plan unless such delivery or distribution complies with all applicable laws (including, the requirements of the Securities Act), and the applicable requirements of any Exchange or similar entity.

(b)    Certificates.To the extent that the Plan provides for the issuance of shares of Stock, the issuance may be effected on anon-certificated basis, to the extent not prohibited by the Company’s governance documents, applicable law or the applicable rules of any Exchange.

(c)    Award Payouts.Awards may be paid out in the form of cash, shares of Stock, or combinations thereof as the Committee shall determine in its sole and absolute discretion, and with such restrictions as it may impose. The Committee may, in its sole discretion, determine that upon the exercise of a Stock Option, make a cash payment to the Participant, in whole or in part, in lieu of the delivery of shares of Stock. Such cash payment to be paid in lieu of delivery of shares of Stock shall be equal to the difference between the Fair Market Value of the shares of Stock on the date of the Stock Option exercise and the Exercise Price per share of the Stock Option multiplied by the number of shares of Stock subject to such Stock Option to becashed-out. Such cash payment shall be in exchange for the cancellation of such Stock Option. Such cash payment shall not be made in the event that such transaction would result in liability to the Participant or the Company under Section 16(b) of the Exchange Act and regulations promulgated thereunder, or subject the Participant to additional tax liabilities related to such cash payments pursuant to Code Section 409A. The Committee may, in its sole and absolute discretion, determine that upon a Change in Control of the Company each outstanding Stock Option shall be cancelled in exchange for a cash payment equal to the difference between the Fair Market Value of the shares of Stock on the date of the Stock Option cancellation and the Exercise Price per share of the Stock Option multiplied by the number of shares of Stock subject to such Stock Option.

(d)    Other Matters. In no event shall any shares newly-issued by the Company be issued for less than the minimum lawful consideration for such shares or for consideration other than consideration permitted by applicable state law. In the event that the Committee allows a Participant to exercise a Stock Option by delivering shares of Stock previously owned by such Participant, any such shares delivered which were initially acquired by the Participant from

A-7

the Company (upon exercise of a stock option or otherwise) must have been owned by the Participant for at least six months prior to such date of delivery, except in the case of the net settlement of Stock Options. Shares of Stock used to satisfy the Exercise Price of a Stock Option shall be valued at their Fair Market Value on the date of exercise. The Company will not be obligated to deliver any shares of Stock unless and until it receives full payment of the Exercise Price and any related tax withholding obligations have been satisfied, or until any other conditions applicable to exercise or purchase have been satisfied. No Participant shall have any of the rights of a shareholder of the Company until shares of Stock are issued upon the exercise of such Stock Options or the delivery of shares following the vesting of a Restricted Stock Award, except as otherwise provided herein. Unless expressly provided otherwise in the applicable Award Agreement, the Committee may at any time within its sole discretion eliminate or limit a Participant’s ability to pay the purchase or Exercise Price of any Award by any method other than a cash payment to the Company.

ARTICLE 4 - CHANGE IN CONTROL

Section 4.1Consequence of a Change in Control. Subject to the provisions of Section 3.3(relating to the adjustment of shares), and except as otherwise provided in the Plan or as determined by the Committee and set forth in the terms of any Award Agreement:

(a)    Upon a Change in Control, all Stock Options then held by the Participant shall become fully earned and exercisable (subject to the expiration provisions otherwise applicable to the Stock Option).

(b)    Upon a Change in Control, all Restricted Stock Awards described in Section 2.1(b) shall become fully earned and vested immediately.

(c)    In the event of a Change in Control, any performance measure or condition applicable to an Award under the Plan shall be deemed satisfied as of the date of the Change in Control.

Section 4.2Definition of Change in Control. For purposes of the Plan, unless otherwise provided in an Award Agreement, a “Change in Control” shall be deemed to have occurred upon the earliest to occur of the following:

(a)    Merger. The Company merges into or consolidates with another entity, or merges another bank or corporation into the Company, and as a result, less than a majority of the combined voting power of the resulting corporation immediately after the merger or consolidation is held by persons who were shareholders of the Company immediately before the merger or consolidation;

(b)    Acquisition of Significant Share Ownership.A person or persons acting in concert has or have become the beneficial owner of 25% or more of a class of the Company’s Voting Securities; provided, however, this clause (b) shall not apply to beneficial ownership of the Company’s voting shares held in a fiduciary capacity by an entity of which the Company directly or indirectly beneficially owns 50% or more of its outstanding Voting Securities;

(c)    Change in Board Composition. During any period of two consecutive years, individuals who constitute the Company’s Board of Directors at the beginning of thetwo-year period cease for any reason to constitute at least a majority of the Company’s Board of Directors; provided, however, that for purposes of this clause (c), each director who is first elected by the board (or first nominated by the board for election by the shareholders) by a vote of at leasttwo-thirds (2/3) of the directors who were directors at the beginning of thetwo-year period shall be deemed to have also been a director at the beginning of such period; or

(d)    Sale of Assets. The Company sells to a third party all or substantially all of its assets.

Notwithstanding the foregoing, in the event that an Award constitutes Deferred Compensation, and the settlement of, or distribution of benefits under, such Award is to be triggered solely by a Change in Control, then with respect to such Award, a Change in Control shall be defined as required under Code Section 409A, as in effect at the time of such transaction.

A-8

ARTICLE 5 – COMMITTEE

Section 5.1Administration. The Plan shall be administered by the Board or the members of the Compensation Committee of the Company who are Disinterested Board Members. If the Committee consists of fewer than three Disinterested Board Members, then the Board shall appoint to the Committee such additional Disinterested Board Members as shall be necessary to provide for a Committee consisting of at least three Disinterested Board Members. Any members of the Committee who do not qualify as Disinterested Board Members shall abstain from participating in any discussion or decision to make or administer Awards that are made to Participants who at the time of consideration for such Award are persons subject to the short-swing profit rules of Section 16 of the Exchange Act. The Board or the Committee (or if necessary to maintain compliance with the applicable listing standards, those members of the Committee who are “independent directors” under the corporate governance statutes or rules of any Exchange on which the Company lists, has listed or seeks to list its securities) may, in their discretion, take any action and exercise any power, privilege or discretion conferred on the Board or the Committee under the Plan with the same force and effect under the Plan as if done or exercised by the Committee.

Section 5.2Powers of Committee. The administration of the Plan by the Committee shall be subject to the following:

(a)    The Committee will have the authority and discretion to select from among the Company’s and its Subsidiaries’ Directors and Employees, those persons who shall receive Awards, to determine the time or times of receipt, to determine the types of Awards and the number of shares of Stock covered by the Awards, to establish the terms, conditions, performance criteria, if any, restrictions (including without limitation, provisions relating tonon-competition,non-solicitation and confidentiality), and other provisions of such Awards (subject to the restrictions imposed by Article 6) to cancel or suspend Awards and to reduce, eliminate or accelerate any restrictions or vesting requirements applicable to an Award at any time after the grant of the Award.

(b)    The Committee will have the authority and discretion to interpret the Plan, to establish, amend and rescind any rules and regulations relating to the Plan, and to make all other determinations that may be necessary or advisable for the administration of the Plan.

(c)    The Committee will have the authority to define terms not otherwise defined herein.

(d)    Any interpretation of the Plan by the Committee and any decision made by it under the Plan is final and binding on all persons.

(e)    In controlling and managing the operation and administration of the Plan, the Committee shall take action in a manner that conforms to the charter and bylaws of the Company and applicable corporate law.

Section 5.3Delegation by Committee. The Chairman of the Committee and such other directors and officers of the Company as shall be designated by the Committee are hereby authorized to execute Agreements on behalf of the Company and to cause them to be delivered to the recipients of Awards.

Section 5.4Information to be Furnished to Committee. As may be permitted by applicable law, the Company and its Subsidiaries shall furnish the Committee with such data and information as it determines may be required for it to discharge its duties. The records of the Company and its Subsidiaries as to a Participant’s employment, termination of employment, leave of absence, reemployment and compensation shall be conclusive on all persons unless determined by the Committee to be manifestly incorrect. Subject to applicable law, Participants and other persons entitled to benefits under the Plan must furnish the Committee such evidence, data or information as the Committee considers desirable to carry out the terms of the Plan.

Section 5.5Committee Action.The Committee shall hold such meetings, and may make such administrative rules and regulations, as it may deem proper. A majority of the members of the Committee shall constitute a quorum, and the action of a majority of the members of the Committee present at a meeting at which a quorum is present, as well as actions taken pursuant to the unanimous written consent of all of the members of the Committee without holding a meeting, shall be deemed to be actions of the Committee. Subject to Section 5.1, all actions of the Committee shall be final and conclusive and shall be binding upon the Company, Participants and all other interested parties. Any person dealing with the Committee shall be fully protected in relying upon any written notice, instruction, direction or other communication signed by a member of the Committee or by a representative of the Committee authorized to sign the same in its behalf.

A-9

ARTICLE 6 - AMENDMENT AND TERMINATION

Section 6.1General. The Board may, as permitted by law, at any time, amend or terminate the Plan, and may amend any Award Agreement, provided that no amendment or termination (except as provided in Section 2.6, Section 3.3 and Section 6.2) may cause there-pricing of a Stock Option or, in the absence of written consent to the change by the affected Participant (or, if the Participant is not then living, the affected beneficiary), adversely impair the rights of any Participant or beneficiary under any Award granted under the Plan prior to the date such amendment is adopted by the Board;provided, however, that, no amendment may (a) materially increase the benefits accruing to Participants under the Plan, (b) materially increase the aggregate number of securities which may be issued under the Plan, other than pursuant to Section 3.3, or (c) materially modify the requirements for participation in the Plan, unless the amendment under (a), (b) or (c) above is approved by a vote of the Company’s shareholders.

Section 6.2Amendment to Conform to Law and Accounting Changes. Notwithstanding any provision in this Plan or any Award Agreement to the contrary, the Committee may amend the Plan or any Award Agreement, to take effect retroactively or otherwise, as deemed necessary or advisable for the purpose of (i) conforming the Plan or the Award Agreement to any present or future law relating to plans of this or similar nature (including, but not limited to, Code Section 409A), or (ii) avoiding an accounting treatment resulting from an accounting pronouncement or interpretation thereof issued by the Securities and Exchange Commission or Financial Accounting Standards Board subsequent to the adoption of the Plan or the making of the Award affected thereby, which, in the sole discretion of the Committee, may materially and adversely affect the financial condition or results of operations of the Company. By accepting an Award under this Plan, each Participant agrees and consents to any amendment by the Committee or the Board made pursuant to Sections 2.6, 6.2 or 7.17(b) to any Award granted under the Plan without further consideration or action.

ARTICLE 7 - GENERAL TERMS

Section 7.1No Implied Rights.

(a)    No Rights to Specific Assets.Neither a Participant nor any other person shall by reason of participation in the Plan acquire any right in or title to any assets, funds or property of the Company or any Subsidiary whatsoever, including any specific funds, assets, or other property which the Company or any Subsidiary, in its sole discretion, may set aside in anticipation of a liability under the Plan. A Participant shall have only a contractual right to the shares of Stock or amounts, if any, payable or distributable under the Plan, unsecured by any assets of the Company or any Subsidiary, and nothing contained in the Plan shall constitute a guarantee that the assets of the Company or any Subsidiary shall be sufficient to pay any benefits to any person.

(b)    No Contractual Right to Employment or Future Awards.The Plan does not constitute a contract of employment, and selection as a Participant will not give any participating Employee the right to be retained in the employ of the Company or any Subsidiary or any right or claim to any benefit under the Plan, unless such right or claim has specifically accrued under the terms of the Plan. No individual shall have the right to be selected to receive an Award under the Plan, or, having been so selected, to receive a future Award under the Plan.

(c)    No Rights as a Shareholder. Except as otherwise provided in the Plan or in the Award Agreement, no Award under the Plan shall confer upon the holder thereof any rights as a shareholder of the Company prior to the date on which the individual fulfills all conditions for receipt of such rights.

(d)    Compliance with Law.Shares of Stock shall not be issued with respect to any Award granted under the Plan unless the issuance and delivery of such shares shall comply with all relevant provisions of applicable law, including, without limitation, the Securities Act of 1933, as amended, the rules and regulations promulgated thereunder, any applicable state securities laws and the requirements of any Exchange upon which the shares may then be listed. The inability of the Company to obtain any necessary authorizations, approvals or letters ofnon-objection from any regulatory body or authority deemed by the Company’s counsel to be necessary to the lawful issuance and sale of any shares of Stock issuable hereunder shall relieve the Company of any liability with respect to

A-10

thenon-issuance or sale of such shares. As a condition to the exercise of any Stock Option or the delivery of shares of Stock in accordance with an Award, the Company may require the person exercising the Stock Option or receiving delivery of the shares of Stock to make such representations and warranties as may be necessary to assure the availability of an exemption from the registration requirements of federal or state securities law.

Section 7.2Restrictions on Transferability. Except as otherwise so provided by the Committee, ISOs under the Plan are not transferable except (i) as designated by the Participant by will or by the laws of descent and distribution, (ii) to a trust established by the Participant, if under Code Section 671 and applicable state law, the Participant is considered the sole beneficial owner of the Stock Option while held in trust, or (iii) between spouses incident to a divorce or pursuant to a domestic relations order, provided, however, in the case of a transfer within the meaning of this paragraph (iii), the Stock Option shall not qualify as an ISO as of the day of such transfer. The Committee shall have the discretion to permit the transfer of Stock Options (other than ISOs) under the Plan if it determines that the transfer or assignment is for valid estate planning purposes and is permitted under the Code and Rule16b-3 of the Exchange Act;provided, however, that such transfers shall be limited to Immediate Family Members of Participants, trusts and partnerships established for the primary benefit of such family members or to charitable organizations, and;provided, further, that such transfers are not made for consideration to the Participant.

Restricted Stock Awards shall not be transferable prior to the time that such Awards are deemed earned andnon-forfeitable to the Participant unless provided for in accordance with a qualified domestic relations order.

Section 7.3Designation of Beneficiaries. A Participant hereunder may file with the Company a written designation of a beneficiary or beneficiaries under this Plan and may from time to time revoke or amend any such designation (“Beneficiary Designation”). Any designation of beneficiary under this Plan shall be controlling over any other disposition, testamentary or otherwise (unless such disposition is pursuant to a qualified domestic relations order);provided, however, that if the Committee is in doubt as to the entitlement of any such beneficiary to any Award, the Committee may determine to recognize only the legal representative of the Participant, in which case the Company, the Committee and the members thereof shall not be under any further liability to anyone.

Section 7.4Non-Exclusivity. Neither the adoption of this Plan by the Board nor the submission of the Plan to the shareholders of the Company for approval shall be construed as creating any limitations on the power of the Board or the Committee to adopt such other incentive arrangements as either may deem desirable, including, without limitation, the granting of Restricted Stock Awards or Stock Options and such arrangements may be either generally applicable or applicable only in specific cases.

Section 7.5Award Agreement. Each Award granted under the Plan shall be evidenced by an Award Agreement signed by an authorized representative of the Company and the Participant. A copy of the Award Agreement, in any medium chosen by the Committee, shall be provided (or made available electronically) to the Participant.

Section 7.6Form and Time of Elections. Unless otherwise specified herein, each election required or permitted to be made by any Participant or other person entitled to benefits under the Plan, and any permitted modification or revocation thereof, shall be filed with the Company at such times, in such form, and subject to such restrictions and limitations, not inconsistent with the terms of the Plan, as the Committee shall require.

Section 7.7Evidence. Evidence required of anyone under the Plan may be by certificate, affidavit, document or other information upon which the person is acting considers pertinent and reliable, and signed, made or presented by the proper party or parties.

Section 7.8Tax Withholding and Tax Matters.

(a)    Where a Participant is entitled to receive shares of Stock upon the vesting or exercise of an Award, the Company shall have the right to require such Participant to pay to the Company the amount of any tax that the Company is required to withhold with respect to such vesting or exercise, or, in lieu thereof, to retain, or to sell without notice, a sufficient number of shares of Stock to cover the minimum amount required to be withheld. To the extent determined by the Committee and specified in an Award Agreement, a Participant may be provided the opportunity to direct the Company to satisfy the minimum required federal, state and local tax withholding by: (i) with respect to a Stock Option settled in Stock, reducing the number of shares of Stock subject to the Stock Option (without issuance of

A-11

such shares of Stock to the Stock Option holder) by a number equal to the quotient of (a) the total minimum amount of required tax withholding divided by (b) the excess of the Fair Market Value of a share of Stock on the exercise date over the Exercise Price per share of Stock; and (ii) with respect to a Restricted Stock Award, withholding a number of shares (based on the Fair Market Value on the vesting date) otherwise vesting that would satisfy the minimum amount of required tax withholding; provided that in each case there are no adverse accounting consequences to the Company (with a requirement to have liability classification of an award under Financial Accounting Standards Board Accounting Standards Codification (ASC) Topic 718 being deemed an adverse consequence).

(b)    Notice of Section 83(b) Election. In the event a Participant makes an election under Code Section 83(b) in connection with an Award, the Participant shall notify the Company in writing of such election within ten (10) days of filing notice of the election with the Internal Revenue Service or other governmental authority, in addition to any filing and notification required pursuant to regulations issued under Code Section 83(b) or other applicable provision.

(c)    Notice of Disqualifying Disposition. If any Participant shall make a disposition of Stock delivered pursuant to the exercise of an ISO under the circumstances described in Code Section 421(b) (relating to certain disqualifying dispositions), such Participant shall notify the Company in writing of such disposition within ten (10) days thereof.

(d)    Section 409A Compliance.To the extent that any Award is determined to constitute “nonqualified deferred compensation” within the meaning of Code Section 409A (a “409A Award”), the Award shall be subject to such additional rules and requirements as specified by the Committee from time to time in order to comply with Code Section 409A. In this regard, if any amount under a 409A Award is payable upon a “separation from service” (within the meaning of Code Section 409A) to a Participant who is then considered a “specified employee” (within the meaning of Code Section 409A), then no such payment shall be made prior to the date that is the earlier of (i) six months and one day after the Participant’s separation from service, or (ii) the Participant’s death, but only to the extent such delay is necessary to prevent such payment from being subject to interest, penalties and/or additional tax imposed pursuant to Code Section 409A. Further, the settlement of any such 409A Award may not be accelerated except to the extent permitted by Code Section 409A. To the extent that an Award is deemed to constitute a 409A Award, and for which payment with respect to the Award or acceleration of such Award being deemed earned and exercisable ornon-forfeitable is determined solely by reference to whether a Change in Control has occurred, the term “Change in Control” means (for purposes of determining whether a payment is due or acceleration exists) the first to occur of a “change in the ownership of the Company,” a “change in the effective control of the Company” or a “change in the ownership of a substantial portion of the Company’s assets,” as those phrases are determined under Code Section 409A and the regulations promulgated thereunder, as in effect at the time of such Change in Control transaction.

Section 7.9Action by Company or Subsidiary. Any action required or permitted to be taken by the Company or any Subsidiary shall be by resolution of its board of directors, or by action of one or more members of the Board (including a committee of the Board) who are duly authorized to act for the Board, or (except to the extent prohibited by applicable law or applicable rules of any Exchange on which the Company lists its securities) by a duly authorized officer of the Company or such Subsidiary.

Section 7.10Successors. All obligations of the Company under the Plan shall be binding upon and inure to the benefit of any successor to the Company, whether the existence of such successor is the result of a direct or indirect purchase, merger, consolidation or otherwise, of all or substantially all of the business, stock, and/or assets of the Company.

Section 7.11Indemnification. To the fullest extent permitted by law and the Company’s governing documents, each person who is or shall have been a member of the Committee, or of the Board, or an officer of the Company to whom authority was delegated in accordance with Section 5.3, or an Employee of the Company, shall be indemnified and held harmless by the Company against and from any loss (including amounts paid in settlement), cost, liability or expense (including reasonable attorneys’ fees) that may be imposed upon or reasonably incurred by him or her in connection with or resulting from any claim, action, suit, or proceeding to which he or she may be a party or in which he or she may be involved by reason of any action taken or failure to act under the Plan and against and from any and all amounts paid by him or her in settlement thereof, with the Company’s approval, or paid by him or her in satisfaction of any judgment in any such action, suit, or proceeding against him or her, provided he or she shall give the Company an opportunity, at its own expense, to handle and defend the same before he or she undertakes to handle

A-12

and defend it on his or her own behalf, unless such loss, cost, liability, or expense is a result of his or her own willful misconduct or gross negligence, or except as expressly provided by statute or regulation. The foregoing right of indemnification shall not be exclusive of any other rights of indemnification to which such persons may be entitled under the Company’s charter or bylaws, as a matter of law, or otherwise, or any power that the Company may have to indemnify them or hold them harmless.

Section 7.12No Fractional Shares; Minimum Issuances. Unless otherwise permitted by the Committee, no fractional shares of Stock shall be issued or delivered pursuant to the Plan or any Award. The Committee shall determine whether cash or other property shall be issued or paid in lieu of fractional shares or whether such fractional shares or any rights thereto shall be forfeited or otherwise eliminated by rounding down. No fewer than 100 shares of Stock may be purchased on exercise of any Stock Option unless the total number purchased or exercised is the total number at the time available for purchase or exercise by the Participant.

Section 7.13Governing Law. The Plan, all Awards granted hereunder, and all actions taken in connection herewith shall be governed by and construed in accordance with the laws of the Commonwealth of Virginia without reference to principles of conflict of laws, except as superseded by applicable federal law. The federal and state courts located in the Commonwealth of Virginia within thirty miles of the Company’s principal office, shall have exclusive jurisdiction over any claim, action, complaint or lawsuit brought under the terms of the Plan. By accepting any award under this Plan, each Participant and any other person claiming any rights under the Plan agrees to submit himself or herself and any legal action that the Participant brings under the Plan, to the sole jurisdiction of such courts for the adjudication and resolution of any such disputes.

Section 7.14Benefits Under Other Plans. Except as otherwise provided by the Committee or as set forth in a Qualified Retirement Plan, Awards to a Participant (including the grant and the receipt of benefits) under the Plan shall be disregarded for purposes of determining the Participant’s benefits under, or contributions to, any Qualified Retirement Plan,non-qualified plan and any other benefit plans maintained by the Participant’s employer. The term “Qualified Retirement Plan” means any plan of the Company or a Subsidiary that is intended to be qualified under Code Section 401(a).

Section 7.15Validity. If any provision of this Plan is determined to be illegal or invalid for any reason, said illegality or invalidity shall not affect the remaining parts hereof, but this Plan shall be construed and enforced as if such illegal or invalid provision has never been included herein.

Section 7.16Notice. Unless otherwise provided in an Award Agreement, all written notices and all other written communications to the Company provided for in the Plan or in any Award Agreement, shall be delivered personally or sent by registered or certified mail, return receipt requested, postage prepaid (provided that international mail shall be sent via overnight ortwo-day delivery), or sent by facsimile, email or prepaid overnight courier to the Company at its principal executive office. Such notices, demands, claims and other communications shall be deemed given:

(a)    in the case of delivery by overnight service with guaranteed next day delivery, the next day or the day designated for delivery;

(b)    in the case of certified or registered U.S. mail, five (5) days after deposit in the U.S. mail; or

(c)    in the case of facsimile or email, the date upon which the transmitting party received confirmation of receipt;provided, however,that in no event shall any such communications be deemed to be given later than the date they are actually received, provided they are actually received. In the event a communication is not received, it shall only be deemed received upon the showing of an original of the applicable receipt, registration or confirmation from the applicable delivery service. Communications that are to be delivered by U.S. mail or by overnight service to the Company shall be directed to the attention of the Company’s Corporate Secretary.

Section 7.17Forfeiture Events.

(a)    The Committee may specify in an Award Agreement that the Participant’s rights, payments, and benefits with respect to an Award shall be subject to reduction, cancellation, forfeiture or recoupment upon the occurrence of certain specified events, in addition to any otherwise applicable vesting or performance conditions of an

A-13

Award. Such events include, but are not limited to, termination of employment for cause, termination of the Participant’s provision of Services to the Company or any Subsidiary, violation of material Company or Subsidiary policies, breach of noncompetition, confidentiality, or other restrictive covenants that may apply to the Participant, or other conduct of the Participant that is detrimental to the business or reputation of the Company or any Subsidiary.

(b)    If the Company is required to prepare an accounting restatement due to the material noncompliance of the Company, as a result of misconduct, with any financial reporting requirement under the federal securities laws, any Participant who is subject to automatic forfeiture under Section 304 of the Sarbanes-Oxley Act of 2002 or who is subject to recoupment under Section 954 of the Dodd-Frank Act shall reimburse the Company the amount of any payment in settlement of an Award earned or accrued during the twelve month period following the first public issuance or filing with the SEC (whichever first occurred) of the financial document embodying such financial reporting requirement.

(c)    In addition, Awards granted hereunder are subject to any recoupment policy adopted by the Board from time to time, whether such policy shall have been adopted prior to or following a Participant’s receipt of an Award.

Section 7.18Regulatory Requirements. The grant and settlement of Awards under this Plan shall be conditioned upon and subject to compliance with Section 18(k) of the Federal Deposit Insurance Act, 12 U.S.C. Section 1828(k), and the rules and regulations promulgated thereunder. Further, Participants must exercise or forfeit their Stock Options in the event the Company becomes critically undercapitalized or receives a capital directive, as determined by the Company’s state or primary federal banking regulator.

Section 7.19Shareholder Approval. Shareholder approval of such Plan shall be determined by an affirmative vote of a majority of the Company’s shareholders present, in person or by proxy, at a meeting of shareholders of the Company held within one year of the date of adoption of the Plan by the Board of Directors of the Company. Any material amendment to the Plan deemed to require an approval vote of shareholders shall be approved by the requisite vote determined in accordance with applicable law.

Section 7.20Section 16 of Exchange Act.It is the intent of the Company that the Awards and transactions permitted by Awards be interpreted in a manner that, in the case of Participants who are or may be subject to Section 16 of the Exchange Act, qualify, to the maximum extent compatible with the express terms of the Award, for exemption from matching liability under Rule16b-3 promulgated under the Exchange Act. Notwithstanding the foregoing, the Company shall have no liability to any Participant for Section 16 consequences of Awards or events affecting Awards if an Award or event does not so qualify.

ARTICLE 8 - DEFINED TERMS; CONSTRUCTION

Section 8.1    In addition to the other definitions contained herein, unless otherwise specifically provided in an Award Agreement, the following definitions shall apply:

“10% Shareholder” means an individual who, at the time of grant, owns stock possessing more than 10% of the total combined voting power of all classes of stock of the Company in accordance with Code Section 422.

“Advisory Director” means an individual designated by the Board of Directors of the Company as a member of an advisory board established by the Company or any Subsidiary or an individual serving the Company as a director emeritus, advisory director or in a similar capacity.

“Award” means any Stock Option or Restricted Stock Award or any combination of each, or any other right or interest relating to Stock or cash, granted to a Participant under the Plan.

“Award Agreement” means the document (in whatever medium prescribed by the Committee) which evidences the terms and conditions of an Award under the Plan. Such document is referred to as an agreement, regardless of whether a Participant’s signature is required.

“Bank” means MainStreet Bank, Fairfax, Virginia, and any successors thereto.

A-14

“Board” means the Board of Directors of the Company.

“Cause” or “Termination for Cause” means: (i) If the Participant is subject to a written employment agreement (or other similar written agreement) with the Company or a Subsidiary that provides a definition of termination for “Cause,” then, for purposes of this Plan, the term “Cause” shall have meaning set forth in such agreement, and (ii) In the absence of such a definition, “Cause” means (i) the conviction of the Participant of a felony or of any lesser criminal offense involving moral turpitude; (ii) the willful commission by the Participant of a criminal or other act that, in the judgment of the Board, will likely cause substantial economic damage to the Company or any Subsidiary or substantial injury to the business reputation of the Company or any Subsidiary; (iii) the commission by the Participant of an act of fraud in the performance of his duties on behalf of the Company or any Subsidiary; (iv) the continuing willful failure of the Participant to perform his duties to the Company or any Subsidiary (other than any such failure resulting from the Participant’s incapacity due to physical or mental illness) after written notice thereof; or (v) an order of a federal or state regulatory agency or a court of competent jurisdiction requiring the termination of the Participant’s Service with the Company.

“Change in Control” has the meaning ascribed to it in Section 4.2.

“Code” means the Internal Revenue Code of 1986, as amended, and any rules, regulations and guidance promulgated thereunder, as modified from time to time.

“Code Section 409A” means the provisions of Code Section 409A and any rules, regulations and guidance promulgated thereunder, as modified from time to time.

“Committee” means the Board or the Committee acting under Article 5.

“Company” shall mean MainStreet Bancshares, Inc. and any successors thereto, as the successor entity of MainStreet Bank and the parent holding company of such banking entity established in accordance with a plan of reorganization and share exchange.

“Director” means a member of the Board of Directors of the Company or a Subsidiary, or any successors thereto from time to time.

“Disability” or “Disabled” means: (i) with respect to Incentive Stock Options, the “permanent and total disability” of the Employee as such term is defined at Code Section 22(e)(3); and (ii) with respect to other Awards, a condition of incapacity of a Participant which renders that person unable to engage in the performance of his or her duties by reason of any medically determinable physical or mental impairment which can be expected to result in death or which has lasted or can be expected to last for a continuous period of not less than twelve (12) months. In either case, except to the extent prohibited under Code Section 409A, if applicable, the Committee shall have discretion to determine if a termination due to Disability has occurred.

“Disinterested Board Member” means a member of the Board who: (a) is not a current Employee of the Company or a Subsidiary; (b) is not a former employee of the Company or a Subsidiary who receives compensation for prior Services (other than benefits under atax-qualified retirement plan) during the taxable year; (c) has not been an officer of the Company or a Subsidiary; (d) does not receive remuneration from the Company or a Subsidiary, either directly or indirectly, in any capacity other than as a Director except in an amount for which disclosure would not be required pursuant to Item 404 of SEC RegulationS-K in accordance with the proxy solicitation rules of the SEC, as amended or any successor provision thereto; and (e) does not possess an interest in any other transaction, and is not engaged in a business relationship for which disclosure would be required pursuant to Item 404(a) of SEC RegulationS-K under the proxy solicitation rules of the SEC, as amended or any successor provision thereto. A Disinterested Board Member must be eligible to serve on the Company’s Compensation Committee as required by any Exchange on which the Company lists its securities, if applicable. The term Disinterested Board Member shall be interpreted in such manner as shall be necessary to conform to the requirements of Rule16b-3 promulgated under the Exchange Act and the corporate governance standards imposed on compensation committees under the listing requirements imposed by any Exchange on which the Company lists or seeks to list its securities.

“Employee” means any person employed by the Company or any Subsidiary. Directors who are also employed by the Company or a Subsidiary shall be considered Employees under the Plan.

A-15

“Exchange” means any national securities exchange on which the Stock may fromtime-to-time be listed or traded.

“Exchange Act” means the Securities Exchange Act of 1934, as amended from time to time.

“Exercise Price” means the purchase price of the Stock established with respect to a Stock Option pursuant to Section 2.2.

“Fair Market Value” on any date, means (i) if the Stock is listed on an Exchange, the closing sales price on such Exchange or over such system on such date (and without regard to after-hours trading activity) or, in the absence of reported sales on such date, the closing sales price on the immediately preceding date on which sales were reported, or (ii) if the Stock is not listed on a securities exchange, “Fair Market Value” shall mean a price determined by the Committee in good faith on the basis of objective criteria, and in accordance with Code Sections 409A and 422, if applicable.

“Immediate Family Member” means with respect to any Participant: (a) any of the Participant’s children, stepchildren, grandchildren, parents, stepparents, grandparents, spouses, former spouses, siblings, nieces, nephews,mothers-in-law,fathers-in-law,sons-in-law,daughters-in-law,brothers-in-law orsisters-in-law, including relationships created by adoption; (b) any natural person sharing the Participant’s household (other than as a tenant or employee, directly or indirectly, of the Participant); (c) a trust in which any combination of the Participant and persons described in section (a) and (b) above own more than 50% of the beneficial interests; (d) a foundation in which any combination of the Participant and persons described in sections (a) and (b) above control management of the assets; or (e) any other corporation, partnership, limited liability company or other entity in which any combination of the Participant and persons described in sections (a) and (b) above control more than 50% of the voting interests.

“ISO” has the meaning ascribed to it in Section 2.1(a).

“Non-QualifiedProxy Tabulation: P.O. BOX 8016, CARY, NC 27512-9903 Stock Option” means the right to purchase shares of Stock that is either (i) granted to a Participant who is not an Employee, or (ii) granted to an Employee and either is not designated by the Committee to be an ISO or does not satisfy the requirements of Code Section 422.

“Outside Director” means any member of the Board who is not also at that time an Employee.

“Participant” means any individual who has received, and currently holds, an outstanding Award under the Plan.

“Restricted Stock” or “Restricted Stock Award” has the meaning ascribed to it in Section 2.3.

“Retirement” means, unless otherwise specified in an Award Agreement, termination from employment as an Employee on or after the attainment of age 65 and completion of not less than ten years of employment, or Termination of Service as a Director on or after completion of not less than three years of Board service and having attained the of age 70;provided, however, that unless otherwise specified in an Award Agreement, an Employee who is also a Director shall not be deemed to have terminated due to Retirement for purposes of vesting of Awards and the exercise of Stock Options until both Service as an Employee and Service as a Director has ceased. A Outside Director will be deemed to have terminated due to Retirement for purposes of vesting of Awards and the exercise of Stock Options only if the Outside Director has terminated Service on the Board(s) of Directors of the Company and any Subsidiary or affiliate in accordance with applicable Company policy, following the provision of written notice to such Board(s) of Directors of the Outside Director’s intention to retire. An Outside Director who continues in Service as an Advisory Director shall be deemed to be in the Service of the Company or a Subsidiary for purposes of vesting of Awards and exercise of Stock Options.

“SEC” means the United States Securities and Exchange Commission.

“Securities Act” means the Securities Act of 1933, as amended from time to time.

A-16

“Service” means continuous service as an Employee, service provider, or Outside Director of the Company or a Subsidiary, as the case may be, and shall include service as a director emeritus or advisory director. Service shall not be deemed interrupted in the case of sick leave, military leave or any other absence approved by the Company or a Subsidiary, in the case of transferees between payroll locations or between the Company, a Subsidiary or a successor.

“Stock” means the common stock of the Company, $4.00 par value per share.

“Stock Option” means an ISO or a
Non-QualifiedYOUR VOTE IS IMPORTANT! PLEASE VOTE BY: Stock Option.

“Subsidiary” means any corporation, affiliate, bank or other entity which would be a subsidiary corporation with respect to the Company as defined in Code Section 424(f) and, other than with respect to an ISO, shall also mean any partnership or joint venture in which the Company and/or other Subsidiary owns more than 50% of the capital or profits interests.

“Termination of Service” means the first day occurring on or after a grant date on which the Participant ceases to be an Employee or Director (including an Advisory Directory) of the Company or any Subsidiary, regardless of the reason for such cessation, subject to the following:

(i)    The Participant’s cessation as an Employee shall not be deemed to occur by reason of the transfer of the Participant between the Company and a Subsidiary or between two Subsidiaries.

(ii)    The Participant’s cessation as an Employee shall not be deemed to occur by reason of the Participant’s being on a bona fide leave of absence from the Company or a Subsidiary approved by the Company or Subsidiary otherwise receiving the Participant’s Services, provided such leave of absence does not exceed six months, or if longer, so long as the Employee retains a right to reemployment with the Company or Subsidiary under an applicable statute or by contract. For these purposes, a leave of absence constitutes a bona fide leave of absence only if there is a reasonable expectation that the Employee will return to perform Services for the Company or Subsidiary. If the period of leave exceeds six months and the Employee does not retain a right to reemployment under an applicable statute or by contract, the employment relationship is deemed to terminate on the first day immediately following such
six-monthINTERNET period. For purposes of this
sub-sectionGo • To: www.proxypush.com/MNSB (ii), to the extent applicable, an Employee’s leave of absence shall be interpreted by the Committee in a manner consistent with Treasury Regulation
Section 1.409A-1(h)(1).

(iii)    If, as a result of a sale or other transaction, the Subsidiary for whom Participant is employed (or to whom the Participant is providing Services) ceases to be a Subsidiary, and the Participant is not, following the transaction, an Employee of the Company or an entity that is then a Subsidiary, then the occurrence of such transaction shall be treated as the Participant’s Termination of Service caused by the Participant being discharged by the entity for whom the Participant is employed or to whom the Participant is providing Services.

(iv)    Except to the extent Code Section 409A may be applicable to an Award, and subject to the foregoing paragraphs of thissub-section, the Committee shall have discretion to determine if a Termination of Service has occurred and the date on which it occurred. In the event that any Award under the Plan constitutes Deferred Compensation (as defined in Section 2.6 hereof), the term Termination of Service shall be interpreted by the Committee in a manner consistent with the definition of “Separation from Service” as defined under Code Section 409A and under Treasury RegulationSection 1.409A-1(h)(ii). For purposes of this Plan, a “Separation from Service” shall have occurred if the Company and Participant reasonably anticipate that no further Services will be performed by the Participant after the date of the Termination of Service (whether as an employee or as an independent contractor) or the level of further Services performed will be less than 50% of the average level of bona fide Services in the 36 months immediately preceding the Termination of Service. If a Participant is a “Specified Employee,” as defined in Code Section 409A and any payment to be made hereunder shall be determined to be subject to Code Section 409A, then if required by Code Section 409A, such payment or a portion of such payment (to the minimum extent possible) shall be delayed and shall be paid on the first day of the seventh month following Participant’s Separation from Service.

(v)    With respect to a Participant who is a Director, cessation as a Director will not be deemed to have occurred if the Participant continues as a director emeritus or Advisory Director. With respect to a Participant who is both an Employee and a Director, termination of employment as an Employee shall not constitute a Termination of Service for purposes of the Plan so long as the Participant continues to provide Service as an Outside Director or director emeritus or Advisory Director.

A-17

“Voting Securities” means any securities which ordinarily possess the power to• Cast your vote in the election of directors without the happening of anyonline
pre-condition or contingency.

Section 8.2    In this Plan, unless otherwise stated or the context otherwise requires, the following uses apply:

(a)    actions permitted under this Plan may be taken at any time and from time to time in the actor’sreasonable discretion;

(b)    references to a statute shall refer to the statute and any successor statute, and to all regulations promulgated under or implementing the statute or its successor, as in effect at the relevant time;

(c)    in computing periods from a specified date to a later specified date, the words “from” and “commencing on” (and the like) mean “from and including,” and the words “to,” “until” and “ending on” (and the like) mean “to, but excluding”;

(d)    references to a governmental or quasi-governmental agency, authority or instrumentality shall also refer to a regulatory body that succeeds to the functions of the agency, authority or instrumentality;

(e)    indications of time of day mean Eastern Time;

(f)    “including” means “including, but not limited to”;

(g)    all references to sections, schedules and exhibits are to sections, schedules and exhibits in or to this Plan unless otherwise specified;

(h)    all words used in this Plan will be construed to be of such gender or number as the circumstances and context require;

(i)    the captions and headings of articles, sections, schedules and exhibits appearing in or attached to this Plan have been inserted solely for convenience of reference and shall not be considered a part of this Plan nor shall any of them affect the meaning or interpretation of this Plan or any of its provisions;

(j)    any reference to a document or set of documents in this Plan, and the rights and obligations of the parties under any such documents, shall mean such document or documents as amended from time to time, and any and all modifications, extensions, renewals, substitutions or replacements thereof; and

(k)    all accounting terms not specifically defined herein shall be construed in accordance with generally accepted accounting principles in the United States.

A-18

VOTE BY INTERNET - www.proxyvote.com Use the Internet to transmit your voting instructions and for electronic delivery of information. Vote by 11:59 P.M. EDT on July 16, 2019.• Have your proxy card in hand when you accessProxy Card ready
Follow the web site and follow thesimple instructions to obtainrecord your records and to create an electronic voting instruction form. MAINSTREET BANCSHARES, INC. ELECTRONIC DELIVERY OF FUTURE PROXY MATERIALS 10089 FAIRFAX BLVD. If you would like to reduce the costs incurred by our company in mailing proxy FAIRFAX, VA 22030 materials, you can consent to receiving all future proxy statements, proxy cards and annual reports electronically via e-mail or the Internet. To sign up for electronic delivery, please follow the instructions above to vote using the Internet and, when prompted, indicate that you agree to receive or access proxy materials electronically in future years. VOTE BY
PHONE    - 1-800-690-6903Call 1-866-509-1049
• • Use any touch-tone telephone to transmit your voting instructions. Vote by 11:59 P.M. EDT on July 16, 2019.
• Have your proxy card in hand when you call and then followProxy Card ready
Follow the instructions. VOTE BY simple recorded instructions
MAIL
• • Mark, sign and date your proxy cardProxy Card
Fold and return ityour Proxy Card in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717. If you vote by mail, your proxy must be received by 10:00 A.M. EDT, on July 17, 2019. TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS: E80934-P25779 KEEP THIS PORTION FOR YOUR RECORDS THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED. DETACH AND RETURN THIS PORTION ONLY MAINSTREET BANCSHARES, INC. For Withhold For All To withhold authority to vote for any individual All All Except nominee(s), mark “For All Except” and write the The Board of Directors recommends you vote FOR number(s) of the nominee(s) on the line below. Proposals 1, 2 and 3: 1. Nominees for Three-Year Terms ! ! ! Nominees 01) Elizabeth Bennett 02) Darrell Green 03) Russell Echlov For Against Abstain 2. Approval of the 2019 Equity Incentive Plan. ! ! ! 3. The ratification of the appointment of Yount, Hyde & Barbour, P.C. as the Company’s independent registered public accounting firm for the fiscal year ! ! ! ending December 31, 2019. NOTE: Such other business as may properly come before the Meeting or any adjournment thereof. Please sign exactly as your name(s) appear(s) hereon. When signing as attorney, executor, administrator, or other fiduciary, please give full title as such. Joint owners should each sign personally. All holders must sign. If a corporation or partnership, please sign in full corporate or partnership name by authorized officer. Signature [PLEASE SIGN WITHIN BOX] Date Signature (Joint Owners) Date

Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting: The Notice and Proxy Statement and Annual Report are available at https://www.ir.mstreetbank.com E80935-P25779 MAINSTREET BANCSHARES, INC. MainStreet Bancshares, Inc.
Annual Meeting of Shareholders July 17, 2019,
For Shareholders as of record on March 31, 2021
TIME: Wednesday, May 19, 2021 11:00 AM, Eastern Time PLACE: Annual Meeting to be held live via the Internet—please visit www.proxydocs.com/MNSB for more details.
This proxy is being solicited byon behalf of the Board of Directors
The undersigned shareholders hereby appointappoints Elizabeth Bennett and Terry Saeger (the “Named Proxies”), and Patsy I. Rust,each or either of them, as proxies,the true and lawful attorneys of the undersigned, with full power of substitution and revocation, and authorizes them, and each with the power to appoint his/her substitute, and hereby authorizeor either of them, to represent and to vote as designated on the reverse side of this proxy, all of the shares of Common Stockcommon stock of MAINSTREET BANCSHARES, INC. thatMainStreet Bancshares, Inc. which the shareholders areundersigned is entitled to vote at the Annual Meeting of Shareholders to be held at 11:00 AM, EDT on July 17, 2019, at the MainStreet Bank headquarters, 10089 Fairfax Blvd, Fairfax, VA 22030,said meeting and any adjournment thereof upon the matters specified and upon such other matters as may be properly brought before the meeting or postponement thereof. any adjournment thereof, and revoking any proxy heretofore given.
This proxy, when properly executed, will be voted in the manner directed herein. If no such direction is made, this proxy will be voted “For” Proposals 1, 2“FOR” all nominees for director (Proposal 1) and 3.“FOR” Proposal 2. If any other business is properly presented ason to which this proxy confers discretionary authority, thisthe proxy will be voted ason determined by a majority of the Board of Directors. You may revoke thisrevote the proxy at any time before it is voted at the Annual Meeting. meeting.
You are encouraged to specify your choice by marking the appropriate box (SEE REVERSE SIDE) but you need not mark any box if you wish to vote in accordance with the Board of Directors’ recommendations. The Named Proxies cannot vote your shares unless you sign (on the reverse side) and return this card.
THE BOARD OF DIRECTORS RECOMMENDS A VOTE “FOR” ALL THE BOARD NOMINEES (PROPOSAL 1), “FOR” APPROVING THE 2019 EQUITY INCENTIVE PLAN (PROPOSAL 2), AND “FOR” RATIFICATION OF APPOINTMENT OF THE INDEPENDENT REGISTERED PUBLIC ACCOUNTINGACCOUNTANTING FIRM (PROPOSAL 3). Continued and to be signed on reverse side2)
PLEASE BE SURE TO SIGN AND DATE THIS PROXY CARD AND MARK ON THE REVERSE SIDE

No Spacing;PLEASE ACT PROMPTLY. SIGN, DATE AND RETURN THIS VOTING INSTRUCTION FORM TO THE 401(K) PLAN TRUSTEES IN THE ENCLOSED POSTAGE-PAID ENVELOPE SO THAT IT IS RECEIVED BY 5:00 PM ON JULY 15, 2019.