Exhibit 10.2

DIRECTOR SUPPORT AGREEMENT

This DIRECTOR SUPPORT AGREEMENT (the “Agreement”) is made and entered into as of October 22, 2025, by and between Third Coast Bancshares, Inc. (“TCBX”), a Texas corporation and registered bank holding company under the Bank Holding Company Act of 1956, as amended (the “BHCA”), and [_], an individual resident of the State of [_] (“Director”). Terms with their initial letters capitalized and not otherwise defined herein have the meanings given to them in the Reorganization Agreement (as defined below).

RECITALS

WHEREAS, concurrently with the execution of this Agreement, TCBX, Arch Merger Sub, Inc. (“Merger Sub”), a Texas corporation and wholly owned subsidiary of TCBX, and Keystone Bancshares, Inc. (“Keystone”), a Texas corporation and registered bank holding company under the BHCA, have entered into that certain Agreement and Plan of Reorganization, dated as of the date hereof (the “Reorganization Agreement”), providing for TCBX’s acquisition of Keystone through the merger of Merger Sub with and into Keystone (the “Merger”), with Keystone surviving as a wholly owned subsidiary of TCBX;

WHEREAS, TCBX will acquire all of the assets and liabilities of Keystone, including all of the goodwill of Keystone, pursuant to the Reorganization Agreement which provides, among other things, that (i) Merger Sub will merge with and into Keystone and (ii) that all of the issued and outstanding shares of common stock, par value $1.00 per share, of Keystone (the “Keystone Stock”), other than Cancelled Shares and Dissenting Shares, will be exchanged for the Merger Consideration, which includes a premium to the fair market value and includes the goodwill of Keystone; and

WHEREAS, as a condition and inducement to TCBX’s willingness to enter into the Reorganization Agreement, TCBX and Director have agreed to enter into this Agreement.

NOW, THEREFORE, in consideration for receipt of such confidential information and trade secrets and in consideration of the premises and mutual covenants contained herein and in the Reorganization Agreement intending to be legally bound hereby, TCBX and Director agree as follows;

AGREEMENT

Director Support. Director agrees to use his or her best efforts to refrain from harming the goodwill of Keystone, any Subsidiary of Keystone (“Keystone Subsidiary”), TCBX or any Subsidiary of TCBX, and their respective customer, client and vendor relationships. During the term of this Agreement, Director agrees also to consider Third Coast Bank, a Texas state bank with its principal office in Humble, Texas (“Third Coast Bank”), when obtaining banking products or services for his or her personal or business needs; provided, however, that this Agreement shall not require Director to contact Third Coast Bank for a proposal on any such needs.

Director Covenants.

(a)

Director acknowledges that he has received substantial, valuable consideration, including confidential trade secret and proprietary information relating to the identity and special needs of current and prospective customers of Keystone or any Keystone Subsidiary, Keystone’s and any Keystone Subsidiary’s current and prospective services, Keystone’s and any Keystone Subsidiary’s business projections and market studies, Keystone’s and any Keystone Subsidiary’s business plans and strategies, Keystone’s and any Keystone Subsidiary’s studies and information concerning special services unique to Keystone or any Keystone Subsidiary. Director further acknowledges and agrees that this consideration, including the Merger Consideration, constitutes fair and adequate consideration for the execution of the non-solicitation and non-competition restrictions set forth below. Accordingly, other than in any capacity for or on behalf of TCBX or any Subsidiary of TCBX or as set forth on Schedule A attached hereto, Director agrees that Director will not, directly or indirectly, individually or as an employee, partner, officer, director or shareholder or in any other capacity whatsoever:

solicit the business of any person or entity who is a customer of Keystone or any Keystone Subsidiary as of the date of this Agreement or as of the Closing Date on behalf of any other insured depository institution for the purpose of providing financial services to such person or entity;

ii.

acquire any interest in (directly or indirectly), charter, operate or enter into any franchise or other management agreement with any insured depository institution that has a location (A) in any county in which Keystone or a Keystone Subsidiary has a location as of the Effective Time, or (B) in any county that is contiguous to any of such counties (the “Noncompete Area”) (but notwithstanding the foregoing, Director may (1) retain any existing ownership interest in any insured depository institution as disclosed on Schedule B attached hereto, (2) acquire an ownership interest in any publicly-traded depository institution, so long as that ownership interest does not exceed 1% of the total number of shares outstanding of that depository institution, and (3) invest in an existing mutual fund that invests, directly or indirectly, in such insured depository institutions);

iii.

from and after the Effective Time, serve as an officer, director, employee, agent or consultant to any insured depository institution that has a location within the Noncompete Area;

iv.

establish or operate a branch or other office of an insured depository institution within the Noncompete Area; or

recruit, hire, assist others in recruiting or hiring, discuss employment with, or refer others concerning employment, any person who is, or within the 12 months preceding the Closing Date was, an employee of Keystone or any Keystone Subsidiary; but nothing in this Section 2(a)(v) applies to employment other than in

financial services, and Director shall not be prohibited from hiring any such person who (A) is terminated by Keystone or any Keystone Subsidiary (or their respective successors) or who has voluntarily resigned from employment by Keystone or any Keystone Subsidiary (or their respective successors) without direct or indirect solicitation by Director, provided at least six (6) months have elapsed from the date the person’s employment ended with Keystone, any Keystone Subsidiary, TCBX or any TCBX Subsidiary, (B) responds to any general advertisement appearing in a newspaper, magazine or trade publication, or (C) is a referral made by a placement agency or service so long as such placement agency or service has not been instructed by Director to solicit from Keystone or any Keystone Subsidiary (or their respective successors) such person.

Director may not avoid the purpose and intent of this Section 2(a) by engaging in conduct within the Noncompete Area from a remote location through means such as telecommunications, written correspondence, computer generated or assisted communications, or other similar methods.

(b)

If any court of competent jurisdiction should determine that the terms of this Section 2 are too broad in terms of time, geographic area, lines of commerce or otherwise, that court is to modify and revise any such terms so that they comply with applicable law.

(c)

Director agrees that (i) this Agreement is entered into in connection with the sale to TCBX of Keystone and Keystone Bank, SSB, a Texas state savings bank with its principal office in Bee Cave, Texas (the “Bank”), (ii) Director is receiving valuable consideration for this Agreement, (iii) the restrictions imposed upon Director by this Agreement are essential and necessary to ensure TCBX acquires the goodwill of the Bank, and (iv) all the restrictions (including particularly the time and geographical limitations) set forth in this Agreement are fair and reasonable.

Early Resolution Conference. This Agreement is understood to be clear and enforceable as written and is executed by both parties on that basis. However, should Director later challenge any provision as unclear, unenforceable, or inapplicable to any competitive activity that Director intends to engage in, Director will first notify TCBX in writing and meet with a TCBX representative and a neutral mediator (if TCBX elects to retain one at its expense) to discuss resolution of any disputes between the parties. Director will provide this notice at least twenty-one (21) days before Director engages in any activity on behalf of a competing business or engages in other activity that could foreseeably fall within a questioned restriction. If Director fails to comply with this requirement, Director waives his right to challenge the reasonable scope, clarity, applicability or enforceability of this Agreement and its restrictions at a later time.

Termination. This Agreement and all obligations hereunder will terminate on the earlier of (a) the date the Reorganization Agreement is terminated pursuant to Section 9.01 of the Reorganization Agreement or (b) the date that is twenty-four (24) months after the Closing Date.

Waiver, Amendment and Modification. Any party may unilaterally waive a right which is solely applicable to it. Such action will be evidenced by a signed written notice. No failure to exercise nor any delay in exercising any right, power or privilege hereunder by any party hereto will operate as a waiver thereof. No single or partial exercise of any right, power or privilege hereunder will preclude any other or further exercise thereof or the exercise of any other right, power or privilege. A waiver of any party of any right or remedy on any one occasion will not be construed as a bar to any right or remedy that such party would otherwise have on any future occasion or to any right or remedy that any other party may have hereunder. This Agreement may be amended, modified or supplemented only by an instrument in writing executed by each of the parties hereto.

Governing Law. THIS AGREEMENT IS TO BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAWS OF THE STATE OF TEXAS, WITHOUT REGARD FOR THE PROVISIONS THEREOF REGARDING CHOICE OF LAW THAT WOULD APPLY THE LAW OF A DIFFERENT JURISDICTION. VENUE FOR ANY CAUSE OF ACTION BETWEEN THE PARTIES TO THIS AGREEMENT WILL LIE IN HARRIS COUNTY, TEXAS. EACH PARTY ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY WHICH MAY ARISE UNDER THIS AGREEMENT IS LIKELY TO INVOLVE COMPLICATED AND DIFFICULT ISSUES AND, THEREFORE, EACH SUCH PARTY IRREVOCABLY AND UNCONDITIONALLY WAIVES ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY LEGAL ACTION ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT. EACH PARTY TO THIS AGREEMENT CERTIFIES AND ACKNOWLEDGES THAT (A) NO REPRESENTATIVE OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT SEEK TO ENFORCE THE FOREGOING WAIVER IN THE EVENT OF A LEGAL ACTION, (B) SUCH PARTY HAS CONSIDERED THE IMPLICATIONS OF THIS WAIVER, (C) SUCH PARTY MAKES THIS WAIVER VOLUNTARILY, AND (D) SUCH PARTY HAS BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION 7.

Binding Effect; Assignment. All of the terms, covenants, representations, warranties and conditions of this Agreement are binding upon, and inure to the benefit of and are enforceable by, the parties and their respective successors, representatives and permitted assigns. No party to this Agreement may assign this Agreement, by operation of law or otherwise, in whole or in part, without the prior written consent of the other parties, and any purported assignment made or attempted in violation of this Section shall be null and void.

No Third Party Beneficiaries. Nothing contained in this Agreement, express or implied, is intended to confer upon any Persons, other than the parties hereto or their respective successors, any rights, remedies, obligations, or liabilities under or by reason of this Agreement.

Severability. If any provision of this Agreement is held to be illegal, invalid or unenforceable under present or future laws, then (a) this Agreement is to be construed and enforced as if such illegal, invalid or unenforceable provision were not a part hereof; (b) the remaining

provisions of this Agreement will remain in full force and effect and will not be affected by such illegal, invalid or unenforceable provision or by its severance from this Agreement; and (c) there will be added automatically as a part of this Agreement a provision mutually agreed to which is similar in terms to such illegal, invalid or unenforceable provision as may be possible and still be legal, valid and enforceable.

10.

Specific Performance. Each of the parties hereto acknowledges that the other parties would be irreparably damaged and would not have an adequate remedy at law for money damages if any of the covenants contained in this Agreement were not performed in accordance with its terms or otherwise were materially breached. Each of the parties hereto therefore agrees that, without the necessity of proving actual damages or posting bond or other security, the other party will be entitled to temporary and/or permanent injunction or injunctions which a court of competent jurisdiction concludes is justified to prevent breaches of such performance and to specific enforcement of such covenants in addition to any other remedy to which they may be entitled, at law or in equity.

11.

Entire Agreement. This Agreement, the Reorganization Agreement, the Voting Agreement and the other agreements, documents, schedules and instruments signed and delivered by the parties to each other at the Closing are the full understanding of the parties, a complete allocation of risks between them and a complete and exclusive statement of the terms and conditions of their agreement relating to the subject matter hereof and supersede any and all prior agreements, whether written or oral, that may exist between the parties with respect thereto. Except as otherwise specifically provided in this Agreement, no conditions, usage of trade, course of dealing or performance, understanding or agreement purporting to modify, vary, explain or supplement the terms or conditions of this Agreement is binding unless hereafter made in writing and signed by the party to be bound, and no modification will be effected by the acknowledgment or acceptance of documents containing terms or conditions at variance with or in addition to those set forth in this Agreement.

12.

Rules of Construction. Descriptive headings as to the contents of particular sections are for convenience only and do not control or affect the meaning, construction or interpretation of this Agreement or any particular section. Whenever the words “include,” “includes” or “including” are used in this Agreement, they are deemed to be followed by the words “without limitation.” The words “hereof,” “herein” and “hereunder” and words of similar import when used in this Agreement refer to this Agreement as a whole and not to any particular provision in this Agreement. Each use herein of the masculine, neuter or feminine gender is deemed to include the other genders. Each use herein of the plural includes the singular and vice versa, in each case as the context requires or as is otherwise appropriate. The word “or” is used in the inclusive sense. Any agreement or instrument defined or referred to herein or in any agreement or instrument that is referred to herein means such agreement or instrument as from time to time amended, modified or supplemented, including by waiver or consent. References to a Person are also to its permitted successors or assigns. In the event that an ambiguity or a question of intent or interpretation arises, this Agreement shall be construed as if drafted jointly by the parties, and no presumption or burden of proof shall arise favoring or disfavoring any party by virtue of the authorship of any provision of this Agreement.

13.

Notice. Any and all notices, requests, instructions and other communications required or permitted to be given under this Agreement after the date of this Agreement by any party hereto to any other party may be delivered personally or by nationally recognized overnight courier service or sent by U.S. mail or (except in the case of payments) by email at the respective addresses set forth below and is deemed delivered (a) in the case of personal delivery or email, when received; (b) in the case of mail, upon the earlier of actual receipt or five (5) Business Days after deposit in the United States Postal Service, first class certified or registered mail, postage prepaid, return receipt requested; and (c) in the case of an overnight courier service, one (1) Business Day after delivery to such courier service with and instructions for overnight delivery. The parties may change their respective addresses by written notice to all other parties, sent as provided in this Section. All communications must be in writing and addressed as follows:

If to Director, to the address set forth on Director’s signature page to this Agreement.

If to TCBX:

Bart O. Caraway
Chairman, President and Chief Executive Officer
Third Coast Bancshares, Inc.
20202 Highway 59 North, Suite 190
Humble, Texas 77338
Email: [***]

With a copy (which shall not constitute notice) to:

Michael G. Keeley, Esq.
Norton Rose Fulbright US LLP
2200 Ross Avenue, Suite 3600
Dallas, Texas 75201-7932
Email: mike.keeley@nortonrosefulbright.com

14.

Articles, Sections, Exhibits and Schedules. All articles and sections referred to herein are articles and sections, respectively, of this Agreement and all exhibits and schedules referred to herein are exhibits and schedules, respectively, attached to this Agreement. Descriptive headings as to the contents of particular sections are for convenience only and do not control or affect the meaning, construction or interpretation of this Agreement or any particular section. Any and all schedules, exhibits, certificates or other documents or instruments referred to herein or attached hereto are and will be incorporated herein by reference hereto as though fully set forth herein.

15.

Multiple Counterparts. For the convenience of the parties hereto, this Agreement may be signed in multiple counterparts, each of which will be deemed an original, and all counterparts hereof so signed by the parties hereto, whether or not such counterpart will bear the execution of each of the parties hereto, will be deemed to be, and is to be construed as, one and the same Agreement. A facsimile or electronic scan in “PDF” format of a signed counterpart of this Agreement will be sufficient to bind the party or parties whose signature(s) appear thereon.

[Signature Page Follows]

IN WITNESS WHEREOF, the undersigned have executed this Agreement as of the date first above written.

DIRECTOR

_______________________________________

[Name]

Address:

[Signature Page to Director Support Agreement]

THIRD COAST BANCSHARES, INC.

_______________________________________

Bart O. Caraway,

Its: Chairman, President and
Chief Executive Officer

[Signature Page to Director Support Agreement]

SCHEDULE A

SCHEDULE B

Third Coast Bancshares, Inc. 8-K