EX-10.5





 Exhibit 10.5 

AMERICAN NATIONAL BANK & TRUST 

LOAN AGREEMENT 
 This loan
Agreement (this “Agreement”) is made and entered into to be effective as of March 10, 2021, by and between AMERICAN NATIONAL BANK & TRUST (“Lender”) and THIRD COAST BANCSHARES, INC., a Texas
corporation (“Borrower”). 
 Borrower has applied to Lender for a loan (“Loan”) in an amount of up to
$30,875,000.00, as a revolving line of credit, to consolidate the existing loan balance with lender of $20,875,000 and new funds of $10,000,000 to provide funds for capital injections into Bank to support future growth and/or holding company
expenditures, and to be secured by the stock of Bank, together with other collateral as herein described. To evidence the Loan, Borrower has, of even date herewith, executed and delivered, or caused to be delivered, to Lender a Promissory Note
(“Note”) in the original maximum stated principal amount of the Loan, and various other Loan Documents (as defined below), including a Pledge Agreement (“Pledge Agreement”) executed by Borrower covering the property
therein described. In connection with the Loan, and in consideration of lender’s commitment to fund proceeds of the Loan, the parties hereby agree as follows: 

1.     Definitions. Defined terms used in this Loan Agreement (“Agreement”) shall have the meanings
ascribed to them in Exhibit A attached hereto. 
 2.    Repayment of loan. Borrower shall repay the Loan,
plus accrued interest thereon, as provided in the Note. All payments of principal, interest and other amounts to be paid under this Agreement, the Note, and the other Loan Documents shall be made to Lender at its office at 1500 W. 7th Street, Fort Worth, Texas 76102 (or such other location as Lender advises Borrower in writing), in lawful currency of the United States of America and in immediately available funds. Whenever any
payment hereunder or under the Note shall be stated to be due on a day that is not a Business Day, such payment may be made on the next succeeding Business Day and interest shall continue to accrue during such extension. Borrower may prepay the Note
in whole or part at any time without premium or penalty, but with accrued interest to the date of prepayment on the amount so prepaid, provided that partial prepayments shall be applied to the principal of the Loan in the inverse order of the
required principal payments set forth in the Note and below. Lender shall have no obligation or commitment to renew the Loan. Lender will, however, consider renewing the Loan if (a) the financial condition of Borrower and Bank is satisfactory
to Lender, in its sole discretion, (b) no Event of Default, and no event that with the giving of notice or lapse of time or both would constitute an Event of Default, shall have occurred and be continuing, and (c) Borrower shall have made
payments of all principal and accrued interest owing during the term of the Loan in accordance with the Note. 
 3. Collateral. To
secure full and complete payment and performance of the Obligations, Borrower shall execute and deliver or cause to be executed and delivered the documents described below covering the collateral described in this Section (which, together with any
other property and collateral which may now or hereafter secure the Obligations or any part thereof, is sometimes herein called the “Collateral”): 

(a)    Borrower shall grant to Lender a first priority security interest in one hundred percent (100%) of
the capital stock of the Bank, including common and preferred stock, now owned or hereafter acquired by Borrower, and all products and proceeds thereof, pursuant to the Pledge Agreement (the “Pledged Stock”). Lender shall retain
possession of the certificate or certificates representing the Pledged Stock, together with stock powers duly executed in blank by Borrower. 

(b)     Borrower shall execute and cause to be executed such further documents and instruments, including,
without limitation, Uniform Commercial Code financing statements, as Lender, in 

  

			
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its reasonable discretion, deems necessary or desirable to evidence and perfect its liens and security interests in the Collateral. 

4.    Distributions. If Borrower shall be entitled to receive or shall receive any stock certificate (including,
without limitation, any certificate representing a stock dividend or distribution in connection with any reclassification, increase, or reduction of capital, or issued in connection with any reorganization), option or rights, whether as an addition
to, in substitution of, or in exchange for any shares of any Pledged Stock, Borrower agrees to accept the same as Lender’s agent and to hold the same in trust on behalf of and for the benefit of Lender and to deliver the same forthwith to
Lender in the exact form received, with the endorsement of Borrower where necessary and/or appropriate undated stock powers duly executed in blank, to be held by Lender, subject to the terms of the Pledge Agreement, as additional Collateral. 

5.    Setoff. Lender shall have the right to set off and apply against the Obligations in such manner as Lender may
determine, without notice to Borrower, any and all deposits (general or special, time or demand, provisional or final) or other sums at any time credited by or owing from Lender to Borrower whether or not the Obligations are then due. As further
security for the Obligations, Borrower hereby grants to Lender a security interest in all money, instruments, and other property of Borrower now or hereafter held by Lender, including, without limitation, property held in safekeeping. In addition to
Lender’s right of setoff and as further security for the Obligations, Borrower hereby grants to Lender a security interest in all deposits (general or special, time or demand, provisional or final) and other accounts of Borrower now or
hereafter on deposit with or held by Lender and all other sums at any time credited by or owing from Lender to Borrower. The rights and remedies of Lender hereunder are in addition to other rights and remedies (including, without limitation, other
rights of setoff) which Lender may have. 
 6.A.     Conditions Precedent. The obligation of Lender to make the
Loan is subject to the condition precedent that Lender shall have received all of the following, each dated (unless otherwise indicated) the date hereof, in form and substance satisfactory to Lender, unless otherwise waived by Lender in writing:

 (a)     Articles of Incorporation of Borrower. True, correct, current, and complete Articles of
Incorporation (or Certificate of Formation, as applicable) of the Borrower, certified as true and correct by an officer of Borrower. 

(b)     Bylaws. True, correct, current, and complete Bylaws of the Borrower, certified as true and
correct by an officer of Borrower. 
 (c)     Certificate of Officer and Incumbency. Resolutions
of the Board of Directors of Borrower certified by an officer, which resolutions authorize the execution, delivery and performance of this Agreement, the Note, and the other Loan Documents, together with a certificate of incumbency certifying the
names of the officers of Borrower authorized to sign this Agreement, the Note, and the other Loan Documents, together with specimen signatures of such officers. 

(d)     Governmental Certificates. A (i) certificate of the appropriate government official of
the state of incorporation of Borrower as to the existence of Borrower, dated within ten (10) days prior to the date hereof, and (ii) copy of the good standing certificate of Borrower (or, if in Texas, the Franchise Tax Account Status page
from the website of the Texas Comptroller of Public Accounts), showing an active right to transact business, reflecting a print date within ten (10) days prior to the date hereof. 

(e)     Note. The Note executed by Borrower. 

(f)      Pledge Agreement. The Pledge Agreement executed by Borrower. 

(g)     Pledged Stock. The original certificates representing the Pledged Stock, accompanied by
stock powers duly executed in blank by Borrower (or an agreement from Borrower to timely provide same, in a form acceptable to Lender). 

  

			
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 (h)     Articles of Association and Bylaws. True,
correct, current, and complete articles of association and bylaws of Bank. 
 (i)     Federal Reserve
Approval. A copy of the written authorization of the Board of Governors of the Federal Reserve System granting approval for the formation of Borrower as a bank holding company and authorizing Borrower’s ownership of the Bank. 

(j)    Opinion of Counsel. If requested by Lender, a favorable opinion of legal counsel to Borrower
as to such matters as Lender may reasonably request. 
 (k)    Additional Information. Such
additional documents, instruments, and information as Lender or its legal counsel may request. 
 6.B.     Conditions
Precedent to All Advances. To the extent the Loan includes advances which may be made after the Closing Date, the obligation of the Lender to thereafter make any advance under the Loan is subject to the following additional conditions precedent:

 (a)     Advance Request Form. Lender shall have received an advance request form in a form
satisfactory to Lender, dated the date of such advance, executed by an authorized officer of the Borrower; 

(b)     No Default. No Event of Default, and no event which with the giving of notice or lapse of
time or both would be an Event of Default, shall have occurred and be continuing, or would result from such advance; 

(c)     Representations and Warranties. All of the representations and warranties contained in the
Loan Documents shall be true and correct on and as of the date of such advance with the same force and effect as if such representations and warranties had been made on and as of such date; 

(d)     No Material Adverse Change. No material adverse change in the business, condition (financial
or otherwise), operations, performance, properties or prospects of the Borrower or any of its Subsidiaries shall have occurred since December 31, 2020; 

(e)     Additional Documentation. Lender shall have received such additional approvals or documents
as the Lender or its legal counsel may reasonably request; and 
 (f)     Terms. Lender shall have
reviewed and approved the terms and conditions of the use of proceeds of the advance to be made, including loan review of Bank and any target(s) to be acquired. 

7.     Representations and Warranties. To induce Lender to enter into this Agreement, Borrower represents and
warrants to Lender that: 
 (a)    Borrower (i) is a corporation duly organized, validly existing,
and in good standing under the laws of Texas; (ii) has all requisite corporate power to own assets and carry on its business as now being or as proposed to be conducted; and (iii) is qualified to do business in all jurisdictions in which
the nature of its business makes such qualification necessary and where failure to so qualify would have a material adverse effect on its business, financial condition, or operations. Borrower has the corporate power and authority to execute,
deliver, and perform its obligations under this Agreement and the other Loan Documents to which it is or may become a party. The Bank is a state savings bank duly organized, validly existing, and in good standing under the applicable laws of the
United States and the State of Texas. 
 (b)    The borrowing hereunder and the execution, delivery and
performance by Borrower of this Agreement, the Note and the other Loan Documents have been duly authorized by all necessary action of Borrower and are not in contravention of any law, rule or regulation or of the terms of any agreement or instrument
to which Borrower is a party or by which it may be bound or of Borrower’s articles of incorporation or bylaws. 

  

			
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 (c)    This Agreement, the Note and the other Loan
Documents to which Borrower is a party, when delivered, shall constitute the legal, valid, and binding obligation of Borrower, as the case may be, enforceable against Borrower, as the case may be, in accordance with their respective terms, except as
limited by bankruptcy, insolvency, or other laws of general application relating to the enforcement of creditors’ rights. 

(d)     Each financial statement of Borrower and Bank herewith or heretofore delivered to Lender was
prepared in conformity with GAAP and truly disclosed Borrower’s and Bank’s financial condition (including all of Borrower’s and Bank’s contingent liabilities) as of the date thereof and the results of its operations for the
period covered thereby, and there has been no material adverse change in Borrower’s or Bank’s financial condition and operations subsequent to the date of the most recent financial statement of Borrower and Bank delivered to Lender. 

(e)     No litigation or governmental proceeding is pending, or, to the knowledge of Borrower, threatened
against or affecting Borrower or Bank, which may result in any material adverse change in Borrower’s or Bank’s business, properties or operations. 

(f)     Borrower has no Debt except Debt to Lender and as described on Schedule 1 hereto, if any.
None of Borrower’s or Bank’s assets are subject to any Lien except Liens to Lender and as disclosed on Schedule 2 hereto, if any. Borrower owns, and with respect to Collateral acquired after the date hereof, Borrower will own,
legally and beneficially, the Collateral free of any lien or claim or any right or option on the part of any third party to purchase or otherwise acquire the Collateral or any part thereof, except for the security interest granted to Lender pursuant
to the Security Agreement. The Collateral is not subject to any restriction on transfer or assignment except for compliance with applicable federal and state securities laws and regulations promulgated thereunder. Borrower has the unrestricted right
to pledge the Collateral as contemplated by the Loan Documents. All of the Collateral has been duly and validly issued and is fully paid and nonassessable. The Pledged Stock constitutes one hundred percent (100%) of the issued and outstanding
shares of common capital stock of Bank. There are no existing subscriptions, options, warrants, calls, or rights (including preemptive rights) to acquire, and no existing Debt, securities, or other instruments convertible into or exchangeable
for, capital stock of the Bank. 
 (g)    No certificate or statement herewith or heretofore delivered by
Borrower to Lender in connection herewith, or in connection with any transaction contemplated hereby, contains any untrue statement of a material fact or fails to state any material fact necessary to keep the statements contained therein from being
misleading. 
 (h)     No authorization, approval, or consent of, and no filing or registration with, any
court, governmental authority, or third party is or will be necessary for the execution, delivery, or performance by Borrower of this Agreement and the other Loan Documents to which Borrower is or may become a party or the validity or enforceability
thereof. 
 (i)     Neither Borrower nor any Subsidiary is in violation in any material respect of any
law, rule, regulation, order, or decree of any court, governmental authority, or arbitrator or any agreement to which such Person is a party. 

(j)    Borrower has no Subsidiaries other than Bank. 

(k)    Immediately after the consummation of the transactions to occur on the date hereof and immediately
following the making of each advance hereunder, if any, made on the date hereof and after giving effect to the application of the proceeds of such advances, (i) the fair value of the assets of the Borrower and its Subsidiaries on a consolidated
basis, at a fair valuation, will exceed the debts and liabilities, subordinated, contingent or otherwise, of the Borrower and its Subsidiaries on a consolidated basis; ( ii) the present fair saleable value of the assets and properties of the
Borrower and its Subsidiaries on a consolidated basis will be greater than the amount that will be required to pay the probable liability of the Borrower and its Subsidiaries on a consolidated basis on their debts and other liabilities,


  

			
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subordinated, contingent or otherwise, as such debts and other liabilities become absolute and matured; (iii) the Borrower and its Subsidiaries on a consolidated basis will be able to pay their
debts and liabilities, subordinated, contingent or otherwise, as such debts and liabilities become absolute and matured; and (iv) the Borrower and its Subsidiaries on a consolidated basis will not have unreasonably small capital with which to
conduct the businesses in which they are engaged as such businesses are now conducted and are proposed to be conducted after the date hereof. 

(I)     The Borrower does not intend to, or to permit any of its Subsidiaries to, and does not believe that
it or any of the Subsidiaries will, incur debts beyond its ability to pay such debts as they mature, taking into account the timing of and amounts of cash to be received by it or any such Subsidiary and the timing of the amounts of cash to be
payable on or in respect of its Debt or the Debt of any such Subsidiary. 
 8.     Affirmative Covenants.
Borrower covenants and agrees that, as long as the Obligations or any part thereof are outstanding or Lender has any commitment hereunder, Borrower will observe and perform the following positive covenants, unless Lender shall otherwise consent in
writing: 
 (a)    Borrower will keep and cause Bank to keep adequate books and records, in accordance
with GAAP, of all of its transactions so that at any time, and from time to time, its true and complete financial condition may be readily determined, and, at Lender’s request, make such books and records available for Lender’s inspection
and permit Lender to make and take away copies thereof. 
 (b)     Within forty-five (45) days after
the end of each calendar quarter, commencing with the calendar quarter ending March 31, 2021, Borrower will promptly furnish to Lender a certificate of the Chief Executive Officer or Chief Financial Officer of Borrower stating that to the best of
such officer’s knowledge, no Event of Default has occurred and is continuing,( or if an Event of Default has occurred and is continuing, a statement as to the nature thereof and the action which is proposed to be taken with respect thereto),
and showing in reasonable detail the calculations demonstrating compliance with Sections 8 and 9 hereof. 

(c)    As soon as available, and in any event within forty-five (45) days after the end of each
calendar quarter, commencing with the calendar quarter ending March 31, 2021, Borrower will furnish to Lender a watch list or other reports identifying the Classified Assets and Criticized Assets of Bank. 

(d)     By no later than February 1st of each and
every year during the term of the Loan, Borrower shall and shall cause Bank to create and deliver to Lender a comprehensive and detailed fiscal budget for the forthcoming year, such budget to include projected cash flow information and a pro forma
balance sheet. 
 (e)    As soon as available, Borrower will furnish to Lender one copy of each financial
statement, report, notice, or proxy statement sent by Borrower or Bank to its stockholders generally and one copy of each regular, periodic or special report, registration statement, or prospectus filed by Borrower with any securities exchange or
the Securities and Exchange Commission or any successor entity, and any material order issued by any court, governmental authority, or arbitrator in any proceeding to which Borrower or Bank is a party. 

(f)     Borrower will promptly inform Lender of any litigation against Borrower or Bank or affecting any of
Borrower’s or Bank’s property, if such litigation or potential litigation might, in the event of an unfavorable outcome, have a material adverse effect on Borrower’s or Bank’s financial condition or might cause an Event of
Default. 
 (g)     Borrower will promptly furnish to Lender, at Lender’s request and within
Lender’s sole discretion, such additional financial or other information concerning the assets, liabilities, operations and transactions of Borrower and/or Bank as Lender may from time to time request. 

  

			
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 (h)     Borrower will promptly pay when due any and all
taxes, assessments and governmental charges upon Borrower or Bank or against any of Borrower’s or Bank’s property, unless the same is being contested in good faith by appropriate proceedings and reserves deemed adequate by Lender have been
established therefor. 
 (i)    Borrower will promptly pay all lawful claims, whether for labor,
materials or otherwise, which could, if unpaid, become a lien or charge on any property or assets of Borrower or Bank, unless and to the extent only that the same are being contested in good faith by appropriate proceedings and reserves deemed
adequate by Lender have been established therefor. 
 (j)     Borrower will maintain its and Bank’s
existence and promptly comply and cause Bank to promptly comply with all laws, statutes, ordinances, governmental regulations, agreements, contracts, and instruments applicable to or binding upon it or to any of its property, business, operations
and transactions. 
 (k)     Borrower will maintain, and cause Bank to maintain, with financially sound
and reputable insurance companies or associations, insurance of the kinds, covering the risks and in the relative proportionate amounts, usually carried by companies engaged in businesses similar to that of Borrower and Bank (such insurance to be in
any event in such amounts and covering such risks as shall be satisfactory to Lender), and, at Lender’s request, deliver to Lender evidence of the maintenance of such insurance. 

(l)    Borrower will preserve and maintain all licenses, privileges, franchises, certificates and the like
necessary for the operation of its business. 
 (m)     Borrower will cause Bank to maintain federal
deposit insurance and to be a member of the Federal Deposit Insurance Corporation. 
 (n)     Borrower
will promptly furnish to Lender written notice of (i) the issuance of any notice of charges, cease and desist order (temporary or otherwise) or order to take affirmative action by any governmental or regulatory authority against Borrower or
Bank or any director, officer, employee, agent, or other person participating in the conduct of the affairs of Borrower or Bank, (ii) the service of any notice of intention to remove from office or notice of intention to suspend from office by
any governmental or regulatory authority upon any director or officer of Borrower or Bank, (iii) the issuance of a notice of termination of the status of Bank as an insured bank under the Federal Deposit Insurance Corporation Act, as amended,
or (iv) the commencement of any action, issuance of any order, or the occurrence of any other event between any governmental or regulatory authority the result of which would prohibit, limit or otherwise in any manner restrict the payment of
dividends or flow of monies or benefits from Bank. 
 (o)     Borrower shall deliver to Lender, as soon
as received by Borrower, yearly reviews of the loan portfolio of Bank, which shall be performed by an independent third party acceptable to Lender. 

(p)     Borrower shall deliver, or cause to be delivered, to Lender, as soon as possible upon receipt, but
in any event within one hundred twenty (120) days of year end, annual audited financial statements of Borrower and Bank, commencing with the year ending December, 2020. 

9.     Negative Covenants. Borrower covenants and agrees that, as long as the Obligations or any part thereof are
outstanding or Lender has any commitment hereunder, Borrower will perform and observe the following negative covenants, unless Lender shall otherwise consent in writing: 

(a)     Provided that the result of any such action would not, on a proforma basis (as reasonably
determined by Lender following receipt of information supplied by Borrower as requested by Lender), cause a violation of any of the covenants herein, Borrower will not reorganize, merge, consolidate with, or permit Bank to reorganize, merge, or
consolidate with, or acquire all or substantially 

  

			
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all of the assets of, any other company, firm or association, or make any other substantial change in its capitalization or character of its business. 

(b)    Borrower will not and will not permit    Bank to sell, lease, pledge,
hypothecate, or otherwise dispose of or transfer any rights in any of its assets used or useful in its business, except in the regular course of business for reasonably equivalent cash consideration. 

(c)    Borrower will not permit the Classified Assets of Bank to at any time exceed fifty percent (50%) of
the Tier 1 Capital plus allowance for loan and lease losses of Bank. (8.0%). 
 (d)     Borrower will not
permit Bank’s Leverage Ratio to at any time be less than eight percent 
 (e)    Borrower will not
permit Bank’s Tier 1 Risk-Based Capital Ratio to at any time be less than nine and one-half percent (9.5%); 

(f)     Borrower will not permit Bank’s Total Risk-Based Capital Ratio to at any time be less than ten
and one-half percent (10.5%). 
 (g)    Borrower will not permit
Bank’s Return on Average Assets to be less than one-half percent ((10.5%)) for any fiscal quarter, annualized on a
year-to-date basis. 

(h)    Borrower will not permit Bank’s Tangible Equity Capital to be less than $125,000,000.00.. 

(i)    Borrower will not permit Bank to enter into any speculative activities or securities hedging 

(j)     Borrower will not allow Bank’s Texas Ratio to be more than fifty percent (50%). 

(k)    Borrower will not permit Bank to enter into any speculative activities or securities hedging, nor
permit Bank to sell, pledge, or otherwise hypothecate any of its assets that are outside of the normal operations of Bank. 

(l)    Borrower will not prepay, or permit Bank to prepay, any Debt except the Obligations. 

(m)     Borrower will not make, and will not permit Bank to make, any change in accounting treatment or
reporting practices, except as required by GAAP. 
 (n)    Borrower will not make, and will not permit
any Subsidiary other than Bank to make, any advance, loan, extension of credit, or capital contribution to or investment in, or purchase, or permit any Subsidiary other than Bank to purchase, any stock, bonds, notes, debentures, or other securities
of any Person, except: 
 (i)    readily marketable direct obligations of the United States of America;

 (ii)    fully insured certificates of deposit with maturities of one year or less from the date of
acquisition of any commercial bank operating in the United States; and 
 (iii)    commercial paper of a
domestic issuer if at the time of purchase such paper is rated in one of the two highest rating categories of Standard and Poor’s Corporation or Moody’s Investors Service. 

(o)    Borrower will not incur, create, assume, or permit to exist any Lien upon any of its property,
assets or revenues, whether now owned or hereafter acquired, except Liens in favor of Lender (provided, however, that the foregoing shall not apply to Liens for taxes which are not delinquent or which are being contested in good faith [with bond or
other security reasonably acceptable to Lender if Lender so requires], mechanic’s and materialmen’s Liens with respect to obligations which are not 

  

			
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overdue or which are being contested in good faith, and Liens resulting from deposits to secure the payments of workers’ compensation or other social security or to secure the performance of
bids or contracts in the ordinary course of business). 
 (p)     Borrower will not make any change in
its organizational documents or its fiscal year, nor permit Bank to do so, without the prior written consent of lender. 

(q)     The total aggregate Debt of Borrower shall not exceed fifty percent (50%) of the Total Equity
Capital of Borrower without Lender’s consent. Further, the Bank shall not incur any Debt outside the course of normal historical business operations. 

(r)     Borrower shall not allow its Debt Service Coverage Ratio to be less than 1.5 x measured
quarterly (but on an annualized basis) upon receipt of and based upon financial information delivered in accordance with Section 8. 

10.     Event of Default. Each of the following shall be deemed an “Event of Default”: 

(a)    Borrower shall fail to pay or perform, when due, the Obligations or any part thereof and such
payment remains outstanding more than five (5) days from the date of when due. 
 (b)     A cease
and desist order shall be issued or shall be drafted or recommended against the Bank by any regulatory authority. 

(c)     Any representation or warranty made or deemed made by the Borrower, Bank, or any Obligated Party in
any loan Document or in any certificate, report, notice, or financial statement furnished at any time in connection with this Agreement shall be false, misleading, or erroneous in any material respect when made or deemed to have been made. 

(d)     Borrower, Bank, or any Obligated Party shall fail to perform, observe, or comply with any non-monetary covenant, agreement or term contained in this Agreement or any other loan Document and such failure remains outstanding more than thirty {30) days after receipt of written notice from Lender of such
failure. 
 (e)    Borrower, Bank, or any Obligated Party shall commence a voluntary proceeding seeking
liquidation, reorganization, or other relief with respect to itself or its debts under any bankruptcy, insolvency, receivership, conservatorship, or other similar law now or hereafter in effect or seeking the appointment of a trustee, receiver,
liquidator, custodian, conservator, or other similar official of it or a substantial part of its property or shall consent to any such relief or to the appointment of or taking possession by any such official in such a proceeding commenced against
it or shall make a general assignment for the benefit of creditors or shall generally fail to pay its debts as they become due or shall take any corporate action to authorize any of the foregoing or shall be subject to any proceeding to accomplish a
comparable arrangement. 
 (f)     An involuntary proceeding shall be commenced against the Borrower,
Bank, or any Obligated Party seeking liquidation, reorganization, or other relief with respect to it or its debts under any bankruptcy, insolvency, receivership, conservatorship, or other similar law now or hereafter in effect or seeking the
appointment of a trustee, receiver, liquidator, custodian, conservator, or other similar official for it or a substantial part of its property, and such involuntary proceeding shall remain undismissed and unstayed for a period of sixty
(60) days. 
 (g)    Borrower, Bank, or any Obligated Party shall fail to discharge within a period
of thirty (30) days after the commencement thereof any attachment, sequestration, or similar proceeding involving an amount in excess of Twenty-Five Thousand Dollars ($25,000.00) against any of its assets or properties, unless such proceeding
is being contested diligently and in good faith and adequate reserves have been established. 

  

			
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 (h)     Borrower, Bank, or any Obligated Party shall
fail to satisfy and discharge promptly any judgment against it for the payment of money in an amount in excess of Twenty-Five Thousand Dollars ($25,000.00) unless such judgment is being contested diligently and in good faith and adequate reserves
have been established. 
 (i)    Borrower, Bank, or any Obligated Party shall fail to pay when due any
principal of or interest on any Debt (other than the Obligations), or the maturity of any such Debt shall have been accelerated, or any such Debt shall have been required to be prepaid prior to the stated maturity thereof, or any event shall have
occurred and be continuing that, with the giving of notice or lapse of time or both, would permit any holder or holders of such Debt or any Person acting on behalf of such holder or holders to accelerate the maturity thereof or require any such
prepayment. 
 (j)     This Agreement or any other Loan Document shall cease to be in full force and
effect or shall be declared null and void or the validity or enforceability thereof shall be contested or challenged by Borrower or any of Borrower’s shareholders, or Borrower shall deny that it has any further liability or obligation under any
of the Loan Documents. 
 (k)     Borrower shall fail, at any time, to own and have pledged to Lender at
least 100% of the issued and outstanding shares of capital stock of Bank, or such security interest in favor of Lender shall at any time fail to be a first priority perfected lien and security interest. 

(l)     A material adverse change in the business, condition (financial or otherwise), operations,
performance, payments or prospects of the Borrower or any of its Subsidiaries or affiliates shall have occurred since the Closing Date. 

11.     Rights of Lender. Upon the occurrence of an Event of Default, Lender may without notice terminate its
commitment to lend hereunder and declare the Obligations or any part thereof to be immediately due and payable, and the same shall thereupon become immediately due and payable, without demand, presentment, notice of dishonor, notice of acceleration,
notice of intent to accelerate, notice of intent to demand, or protest, all of which are hereby expressly waived; provided, however, that upon the occurrence of an Event of Default under Section 10(e) or Section 10(f), the commitment
of Lender to lend hereunder shall automatically terminate, and the Obligations shall become immediately due and payable without notice, demand, presentment, notice of dishonor, notice of acceleration, notice of intent to accelerate, notice of intent
to demand, or protest, all of which are hereby expressly waived. Upon the occurrence of any Event of Default, Lender may exercise all rights and remedies available to it in law or in equity, under the Loan Documents or otherwise. 

12.    Maximum Interest Rate. No provision of this Agreement or of the Note shall require the payment or the
collection of interest in excess of the maximum permitted by applicable law. If any excess of interest in such respect is hereby provided for, or shall be adjudicated to be so provided, in the Note or otherwise in connection with this loan
transaction, the provisions of this Section shall govern and prevail and neither Borrower nor the sureties, successors, or assigns of Borrower shall be obligated to pay the excess amount of such interest or any other excess sum paid for use,
forbearance, or detention of sums loaned pursuant hereto. In the event Lender ever receives, collects, or applies as interest any such sum, such amount which would be in excess of the maximum amount permitted by applicable law shall be applied as a
payment and reduction of the principal of the indebtedness evidenced by the Note; and, if the principal of the Note has been paid in full, any remaining excess shall forthwith be paid to Borrower. In determining whether or not the interest paid or
payable exceeds the Maximum Rate, Borrower and Lender shall, to the extent permitted by applicable law, (i) characterize any non principal payment as an expense, fee, or premium rather than as interest, (ii) exclude voluntary prepayments and the
effects thereof, and (iii) amortize, prorate, allocate, and spread in equal or unequal parts the total amount of interest throughout the entire contemplated term of the indebtedness evidenced by the Note so that interest for the entire term
does not exceed the Maximum Rate. 
 13.     Applicable Law. This Agreement and all other documents and
instruments executed pursuant hereto or in connection herewith and the transactions contemplated hereby are made and performable in Wichita 

  

			
	LOAN AGREEMENT — THIRD COAST BANCSHARES, INC.	  	Page 9














 
County, Texas and shall be governed by and construed in accordance with the laws of the State of Texas and the applicable laws of the United States of America. 

14.     Severability. The unenforceability of any provision of this Agreement shall not affect the enforceability
or validity of any other provision hereof. 
 15.     Counterparts. This Agreement may be executed in any number
of counterparts and by different parties hereto on separate counterparts, each of which when so executed shall be deemed to be an original and all of which when taken together shall constitute but one and the same instrument. Delivery of an executed
counterpart by fax or pdf shall be effective as delivery of an original signature. 
 16.     Miscellaneous. No
modification, consent, amendment or waiver of any provision of this Agreement, nor consent to any departure by Borrower therefrom, shall be effective unless the same shall be in writing and signed by an officer of Lender, and then shall be effective
only in the specific instance and for the purpose for which given. No notice to or demand on Borrower in any case shall, of itself, entitle Borrower to any other or further notice or demand in similar or other circumstances. No delay or omission by
Lender in exercising any power or right hereunder shall impair any such right or power or be construed as a waiver thereof or any acquiescence therein, nor shall any single or partial exercise of any such power preclude other or further exercise
thereof, or the exercise of any other right or power hereunder. All rights and remedies of Lender hereunder are cumulative of each other and of every other right or remedy which Lender may otherwise have at law or in equity or under any other
contract or document, and the exercise of one or more rights or remedies shall not prejudice or impair the concurrent or subsequent exercise of other rights or remedies. All accounting terms not specifically defined herein shall be construed in
accordance with GAAP on the basis used by Borrower in prior years. This Agreement is binding upon Borrower, its successors and assigns, and inures to the benefit of Lender, its successors and assigns; provided, however, that Borrower may not assign
its rights or obligations hereunder without Lender’s prior written consent. 
 17.     Expenses of Lender.
Borrower agrees to pay on demand all reasonable costs and expenses incurred by Lender in connection with the preparation, negotiation, execution and administration of this Agreement and the other Loan Documents and the transactions contemplated
hereby. Borrower agrees to pay on demand all reasonable costs and expenses incurred by Lender in connection with any and all amendments, modifications, supplements to, and ongoing administration of this Agreement and the other Loan Documents,
including without limitation the reasonable costs and fees of Lender’s legal counsel, and all costs and expenses incurred by Lender in connection with the enforcement or preservation of any rights under this Agreement or any other Loan
Document, including without limitation the reasonable costs and fees of Lender’s legal counsel. 
 18.
    Omitted. 
 19.     INDEMNIFICATION. EXCEPT FOR LENDER’S GROSS NEGLIGENCE OR
WILFUL MISCONDUCT, BORROWER HEREBY INDEMNIFIES LENDER AND EACH AFFILIATE THEREOF AND THEIR RESPECTIVE OFFICERS, DIRECTORS, EMPLOYEES, ATTORNEYS, AND AGENTS FROM, AND HOLDS EACH OF THEM HARMLESS AGAINST, ANY AND ALL LOSSES, LIABILITIES, CLAIMS,
DAMAGES, PENALTIES, JUDGMENTS, COSTS, AND EXPENSES (INCLUDING ATTORNEYS’ FEES) TO WHICH ANY OF THEM MAY BECOME SUBJECT WHICH DIRECTLY OR INDIRECTLY ARISE FROM OR RELATE TO (i) THE NEGOTIATION, EXECUTION, DELIVERY, PERFORMANCE,
ADMINISTRATION, OR ENFORCEMENT OF ANY OF THE LOAN DOCUMENTS, (ii) ANY OF THE TRANSACTIONS CONTEMPLATED BY THE LOAN DOCUMENTS, (iii) ANY BREACH BY BORROWER OF ANY REPRESENTATION, WARRANTY, COVENANT, OR OTHER AGREEMENT CONTAINED IN ANY OF THE
LOAN DOCUMENTS, OR (iv) ANY INVESTIGATION, LITIGATION, OR OTHER PROCEEDING, INCLUDING, WITHOUT LIMITATION, ANY THREATENED INVESTIGATION, LITIGATION, OR OTHER PROCEEDING RELATING TO ANY OF THE FOREGOING. Without limiting any provision of this
agreement or of any other loan document, it is the express intention of the parties hereto that each person to be indemnified under this Section shall be indemnified from and held harmless against any and all losses, liabilities, claims, damages,
penalties, judgments, costs, and expenses (including attorney’s fees) arising out of or resulting from the sole or contributory negligence of the person to be indemnified. 

  

			
	LOAN AGREEMENT — THIRD COAST BANCSHARES, INC.	  	Page 10














 20.    Limitation of Liability. Neither Lender nor any affiliate,
officer, director, employee, attorney, or agent of Lender shall have any liability with respect to, and Borrower hereby waives, releases, and agrees not to sue any of them upon, any claim for any special, indirect, incidental, or consequential
damages suffered or incurred by Borrower in connection with, arising out of, or in any way related to, this Agreement or any of the other Loan Documents, or any of the transactions contemplated by this Agreement or any of the other Loan Documents.
Borrower hereby waives, releases, and agrees not to sue Lender or any of Lender’s affiliates, officers, directors, employees, attorneys, or agents for punitive damages in respect of any claim in connection with, arising out of, or in any way
related to, this Agreement or any of the other Loan Documents, or any of the transactions contemplated by this Agreement or any of the other Loan Documents. 
  

21.    No Duty. All attorneys, accountants, appraisers, and other professional Persons and consultants retained by
Lender shall have the right to act exclusively in the interest of Lender and shall have no duty of disclosure, duty of loyalty, duty of care, or other duty or obligation of any type or nature whatsoever to Borrower or any of Borrower’s
shareholders or any other Person. 
 22.    Lender Not Fiduciary. The relationship between Borrower and Lender is
solely that of debtor and creditor, and Lender has no fiduciary or other special relationship with Borrower, and no term or condition of any of the Loan Documents shall be construed so as to deem the relationship between Borrower and Lender to be
other than that of debtor and creditor. 
 23.     Equitable Relief. Borrower recognizes that in the event
Borrower fails to pay, perform, observe, or discharge any or all of the Obligations, any remedy at law may prove to be inadequate relief to Lender. Borrower therefore agrees that Lender, if Lender so requests, shall be entitled to temporary and
permanent injunctive relief in any such case without the necessity of proving actual damages. 
 24.    
Participations. Lender shall have the right at any time and from time to time to grant participations in the Note and any other Loan Documents. Each participant shall be entitled to receive all information received by Lender regarding the
creditworthiness of Borrower, including without limitation, information required to be disclosed to a participant pursuant to Banking Circular 181 (Rev., August 2, 1984), issued by the Comptroller of the Currency (whether the participant is subject
to the circular or not). 
 25.    Notices. All notices and other communications provided for in this Agreement
and the other Loan Documents to which Borrower is a party shall be given or made by telex, telegraph, telecopy, cable, or in writing and telexed, telecopied, telegraphed, cabled, mailed by certified mail return receipt requested, or delivered to the
intended recipient at the “Address for Notices” specified below its name on the signature pages hereof; or, as to any party at such other address as shall be designated by such party in a notice to the other party given in accordance with
this Section. Except as otherwise provided in this Agreement, all such communications shall be deemed to have been duly given when transmitted by telex or telecopy, subject to telephone confirmation of receipt, or delivered to the telegraph or cable
office, subject to telephone confirmation of receipt, or when personally delivered or, in the case of a mailed notice, when duly deposited in the mails, in each case given or addressed as aforesaid. 

26.    Defined Terms. Defined terms (i.e., terms delineated with capital letters) not otherwise defined
herein or in Exhibit A shall be given the meanings commonly ascribed to them by the FFIEC, FDIC, state banking authorities, or other authority, as reasonably determined by Lender. 

27.    Omitted. 

28.     Entire Agreement. THIS AGREEMENT, THE NOTE, AND THE OTHER LOAN DOCUMENTS REFERRED TO HEREIN EMBODY THE
FINAL, ENTIRE AGREEMENT AMONG THE PARTIES HERETO AND SUPERSEDE ANY AND ALL PRIOR COMMITMENTS, AGREEMENTS, REPRESENTATIONS, AND UNDERSTANDINGS, WHETHER WRITTEN OR ORAL, RELATING TO THE SUBJECT MATTER HEREOF AND MAY NOT BE CONTRADICTED OR VARIED BY
EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OR DISCUSSIONS OF THE PARTIES HERETO. THERE ARE NO ORAL AGREEMENTS AMONG THE PARTIES HERETO. The provisions of this Agreement and the other Loan Documents to which Borrower is a party
may be amended or waived only by an instrument in writing signed 

  

			
	LOAN AGREEMENT — THIRD COAST BANCSHARES, INC.	  	Page 11














 
by the parties hereto. The terms of this Agreement shall control to the extent of any direct conflict with the terms of the other Loan Documents; however, the parties acknowledge and agree that
the other Loan Documents contain terms supplemental to the terms of this Agreement. 
 29.    WAIVER OF JURY
TRIAL. TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, BORROWER HEREBY IRREVOCABLY AND EXPRESSLY WAIVES ALL RIGHT TO A TRIAL BY JURY IN ANY ACTION, PROCEEDING, OR COUNTERCLAIM (WHETHER BASED UPON CONTRACT, TORT, OR OTHERWISE) ARISING OUT OF
OR RELATING TO ANY OF THE LOAN DOCUMENTS OR THE TRANSACTIONS CONTEMPLATED THEREBY OR THE ACTIONS OF LENDER IN THE NEGOTIATION, ADMINISTRATION, OR ENFORCEMENT THEREOF. 

30.    Confidentiality. Except as provided in Section 24, above, Lender agrees that it will not
disclose without the prior written consent of the Borrower (other than to its employees, auditors, accountants, or counsel or any of its affiliates, who shall agree to maintain the confidential nature of such information) any information with
respect to the Borrower or its Subsidiaries which is furnished to it pursuant to this Agreement or any other Loan Document and which (i) the Borrower in good faith considers to be confidential, and (ii) is clearly marked as confidential,
provided that Lender may disclose any such information (a) to any party to this Agreement; (b) to any Person if reasonably necessary to the administration of the Loan Documents; (c) as has been publicly disclosed; (d) as may be
required or appropriate in any report, statement, or testimony submitted to or required by any municipal, state, or federal regulatory body having or claiming to have jurisdiction over the Lender or any of its affiliates or submitted to or required
by the Board of Governors of the Federal Reserve System, the Federal Deposit Insurance Corporation, the Office of the Comptroller of the Currency, or similar organizations (whether in the United States of America or elsewhere) or their successors;
(e) pursuant to any summons, subpoena, or other legal process, or in connection with any litigation;(f) in order to comply with any law, order, regulation, ruling, or other governmental requirement; (g) to any actual or proposed assignee,
participant, or other transferee in connection with any other transfer of the Note, any advance under the loan, or any interest therein, provided that such assignee, participant or other transferee agrees to preserve the confidentiality of such
information; or (h) in connection with the exercise of any right or remedy by Lender. 
 31.     USA Patriot Act
Notice. Lender hereby notifies Borrower that pursuant to the requirements of the USA Patriot Act (Title Ill of Pub.L. 107-56 (signed into law October 26, 2001)) (the
“Act”), it is required to obtain, verify and record information that identifies Borrower, which information includes the name and address of Borrower and other information that will allow such Lender to identify
Borrower in accordance with the Act. 
 [SIGNATURE PAGE FOLLOWS] 

  

			
	LOAN AGREEMENT — THIRD COAST BANCSHARES, INC.	  	Page 12














 
			
	BORROWER:
	
	THIRD COAST BANCSHARES, INC.
		
	By:	 	/s/ John McWhorter
		 	John McWhorter, Executive Vice President


  

			
	Address for Notices:
	20202 Highway 59 North, Suite 190
	Humble, Texas 77338
	ATTN:    John McWhorter


 LENDER: 
 AMERICAN
NATIONAL BANK & TRUST 

			
		
	By:	 	/s/ Craig Berry
		 	Craig Berry, Executive Vice President

 Address for Notices: 
 1500
W. 7th Street 
 Fort Worth, Texas 76102 

ATTN:     Craig Berry 

  

			
	LOAN AGREEMENT — THIRD COAST BANCSHARES, INC.	  	Page 13














 EXHIBIT A 

DEFINITIONS 
 The
following definitions are used in the Loan Agreement (“Agreement”) to which this Exhibit A is attached, and any references below to sections shall mean sections of the Agreement. 

“Average Assets” means a year-to-date
average of the average assets reported in the Report of Condition Schedule RC-K. Thus, for the first quarter of the year the average assets from Call Schedule RC-K
quarter will appear, while at the end- of- year, assets for all four quarters would be averaged. 
 “Bank” means
Third Coast Bank, SSB, Humble, Texas, a Texas state-chartered bank. 
 “Book Value” means, at any time for any share
of common stock of Bank, Bank’s Equity Capital divided by the total number of shares of common stock of Bank outstanding at such time. 

“Business Day’’ means any day on which commercial banks are not authorized or required to close in Wichita Falls,
Wichita County, Texas. 
 “Cash Flow” means Net Income of the Borrower. 

“Classified Assets” means, at any particular time, all assets of Bank classified as “Loss,”
“Doubtful,” or “Substandard” or in any equivalent category by Bank or any governmental or regulatory authority. 

“Closing Date” means the effective date shown at the beginning of the Agreement. 

“Collateral” has the meaning specified in Section 3. 

“Criticized Assets” means, at any particular time, all assets of the Bank classified as “Loss,”
“Doubtful,” “Substandard,” or “other Assets Especially Mentioned,” or in any equivalent category by the Bank or any governmental or regulatory authority. 

“Debt” means as to any Person at any time (without duplication): (i) all obligations of such Person for borrowed
money, (ii) all obligations of such Person evidenced by bonds, notes, debentures, or other similar instruments, (iii) all obligations of such Person to pay the deferred purchase price of property or services, except trade accounts payable of
such Person arising in the ordinary course of business which are not past due by more than ninety (90) days unless such trade accounts payable are being contested in good faith by appropriate proceedings, (iv) all obligations of such Person
under any lease which, in conformity with GAAP, is required to be capitalized for balance sheet purposes, (v) all obligations of such Person under guaranties, endorsements (other than for collection or deposit in the ordinary course of
business), assumptions or other contingent obligations, in respect of, or to purchase or otherwise acquire, any obligation or indebtedness of any other Person, or any other obligation, contingent or otherwise, of such Person directly or indirectly
protecting the holder of any obligation or indebtedness of any other Person against loss (whether by partnership arrangements, agreements to keep well, to purchase assets, goods, securities, or services, to take or pay or otherwise), (vi) all
obligations secured by a Lien existing on property owned by such Person, whether or not the obligations secured thereby have been assumed by such Person or are non recourse to the credit of such Person, (vii) all reimbursement obligations of
such Person (whether contingent or otherwise) in respect of letters of credit, bankers’ acceptances, surety or other bonds and similar instruments, (viii) all liabilities of such Person in respect of unfunded vested benefits under any
employee benefit plan of Borrower or any Subsidiary and (ix) all obligations under interest rate swap and similar hedging agreements. 

“Debt Service Coverage Ratio” means, at any particular time, the ratio of Borrower’s Cash Flow divided by Total
Debt Service. 
 “Equity Capital” means, at any particular time, the total equity capital of the Bank determined in
accordance with the Instructions (the “Call Report Instructions”) to the Reports of Condition and Income (“Call Reports”) as most recently promulgated by the Federal Financial Institutions Examination Council. 

  

			
	LOAN AGREEMENT — THIRD COAST BANCSHARES, INC.	  	Exhibit A-1














 “Event of Default” has the meaning specified in
Section 10. 
 “GAAP” means generally accepted accounting principles, applied on a consistent basis, as
set forth in Opinions of the Accounting Principles Board of the American Institute of Certified Public Accountants and/or in statements of the Financial Accounting Standards Board and/or their respective successors and which are applicable in the
circumstances as of the date in question. Accounting principles are applied on a “consistent basis” when the accounting principles observed in a current period are comparable in all material respects to those accounting principles applied
in a preceding period. 
 “Lien” means any lien, mortgage, security interest, tax lien, financing statement, pledge,
charge, hypothecation, assignment, preference, priority, or other encumbrance of any kind or nature whatsoever (including, without limitation, any conditional sale or title retention agreement), whether arising by contract, operation of law, or
otherwise. 
 “Loan Documents” means this Agreement and all promissory notes, security agreements, pledge
agreements, guaranties, and other instruments, documents, and agreements now or hereafter executed and delivered pursuant to or in connection with this Agreement and any future renewals, extensions, and amendments hereto or thereto. 

“Maximum Rate” means the maximum rate of nonusurious interest permitted from day to day by applicable law, including
as to Chapter 303, Texas Finance Code, as amended from time to time (and as the same may be incorporated by reference in other Texas statutes), but otherwise without limitation, that rate based upon the “weekly rate ceiling” and calculated
after taking into account any and all relevant fees, payments, and other charges in respect of the Loan Documents which are deemed to be interest under applicable law. 

“Net Income” means net income (loss) attributable to bank, in accordance with the Call Report Instructions. 

“Non-Performing Assets” means loans on nonaccrual, loans on which the interest
rate has been reduced as troubled debt restructurings, loans which have been past due for ninety (90) days or more, and other real estate and other assets which are owned due to foreclosure or as a result of the exercise of legal remedies where
such real estate or other assets were mortgaged or taken as security for loans. 
 “Obligated Party” means Borrower
or any other Person who is or becomes party to any agreement that guarantees or secures payment and performance of the Obligations or any part thereof. 

“Obligations” means all obligations, indebtedness, and liabilities of Borrower to Lender, now existing or hereafter
arising, whether direct, indirect, related, unrelated, fixed, contingent, liquidated, unliquidated, including, without limitation, the obligations, indebtedness, and liabilities of Borrower under this Agreement, the Note, and the other Loan
Documents, and all interest accruing thereon and all attorneys’ fees and other expenses incurred in the enforcement or collection thereof. 

“Person” means any individual, corporation, business trust, association, company, partnership, joint venture, or other
entity. 
 “Pledge Agreement” means the Pledge Agreement(s) of Borrower in favor of
Lender of even date herewith, as the same may be amended, supplemented, or modified. 
 “Pledged Stock” has the
meaning specified in Section 3(a). 
 “Return on Average Assets” means, for the applicable reporting
period, the ratio, expressed as a percentage, of Bank’s Net Income year-to-date annualized to Bank’s Average Assets determined at the end of the applicable
period being analyzed. 
 “Subsidiary” means any corporation or bank of which more than fifty percent (50%) of the
issued and outstanding securities having ordinary voting power for the election of a majority of directors is owned or controlled, directly or indirectly, by Borrower, by Borrower and one or more other Subsidiaries, or by one or more other
Subsidiaries. 

  

			
	LOAN AGREEMENT — THIRD COAST BANCSHARES, INC.	  	Exhibit A-2














 “Tangible Equity Capital” means Equity Capital less Goodwill and
Other Intangible Assets of the Bank determined in accordance with the Call Report Instructions. 
 ‘‘Texas
Ratio” means, at any particular time, the ratio of Bank’s Non-Performing Assets to Tangible Equity Capital (plus loan loss reserve if not included therein). 

“Tier 1 Capital” means, at any particular time, the Tier 1 Capital of the Bank determined in accordance with the Call
Report Instructions. 
 “Tier 1 Leverage Ratio” means, at any particular time, the Tier 1 Leverage Ratio of the Bank
determined in accordance with the Call Report Instructions. 
 “Tier 1 Risk-Based Capital Ratio” means, at any
particular time, the Tier 1 Risk-Based Capital Ratio of the Bank determined in accordance with the Call Report Instructions. 

“Total Assets” means, at any particular time, all amounts which, in conformity with GAAP, would be included as assets
on a balance sheet of Bank determined in accordance with the Call Report Instructions. 
 “Total Debt Service”
means, the outstanding balance of the loan, plus interest at the Rate provided in the Note amortized over a one hundred twenty (120) month period. 

“Total Risk-Based Capital Ratio” means, at any particular time, the Total Risk-Based Capital Ratio of the Bank
determined in accordance with the Call Report Instructions. 

  

			
	LOAN AGREEMENT — THIRD COAST BANCSHARES, INC.	  	Exhibit A-3