Third Amendment to Credit Agreement between Independent Bank Group, Inc. and U.S. Bank National Association, dated January 17, 2022

This THIRD AMENDMENT TO CREDIT AGREEMENT (this “Amendment”) is dated as of January17, 2022 and is between INDEPENDENT BANK GROUP, INC., a Texas corporation (the “Borrower”), and U.S. BANK NATIONAL ASSOCIATION (“U.S. Bank”), a national banking association, as the Lender (the “Lender”) and as Administrative Agent.

A.    Borrower, the Lender and the Administrative Agent are party to a Credit Agreement dated as of January 17, 2019, a First Amendment to Credit Agreement dated as of January 17, 2020, and a Second Amendment to Credit Agreement dated as of January 15, 2021 (the “Second Amendment”) (as amended, restated or otherwise modified, the “Credit Agreement”). Capitalized terms not otherwise defined in this Third Amendment shall have the meanings respectively ascribed to them in the Credit Agreement.

B.    The parties hereto desire to amend and modify the Credit Agreement in accordance with the terms and subject to the conditions set forth in this Amendment.

NOW, THEREFORE, in consideration of the mutual covenants, conditions and agreements herein contained, the parties hereto hereby agree as follows:

SECTION 1.AMENDMENTS TO THE CREDIT AGREEMENT.

Section 1.1Article I - Definitions. The definitions of “Prime Rate” and “Termination Date” as set forth in Article I of the Credit Agreement are amended in their entireties to read as follows:

“Prime Rate” means the greater of (a) two percent (2.00%) and (b) the interest rate publicly announced by U.S. Bank from time to time in Minneapolis, Minnesota (or any other bank that may serve as a successor administrative agent under the Loan Documents) as its prime rate for interest rate determinations, which is solely a reference rate and may be at, above or below the rate or rates at which U.S. Bank (or such other bank acting as successor administrative agent) lends to other Persons. Any change in the Prime Rate shall become effective as of the opening of business on the day on which such change is publicly announced by U.S. Bank (or such other bank acting as successor administrative agent).

“Termination Date” means February 16, 2022 or any earlier date on which the Aggregate Commitment is reduced to zero or otherwise terminated pursuant to the terms hereof.

Section 1.2Interest Rate. Section 2.7 of the Credit Agreement is amended in its entirety to read as follows:

2.7    Interest Rate. Prior to an Event of Default, and except as otherwise provided herein, interest on each Revolving Loan shall accrue from and after January 17, 2022 at an annual rate equal to the Prime Rate minus 1.40% for each

day such Revolving Loan is outstanding. The Administrative Agent’s internal records of applicable interest rates shall be determinative in the absence of manifest error.

Section 1.3    Notices. Section 14.1(a) of the Credit Agreement is amended in its entirety to read as follows:

(a)Notices Generally. Except in the case of notices and other communications expressly permitted to be given by telephone (and except as provided in paragraph (b) below), all notices and other communications provided for herein shall be in writing and shall be delivered by hand or overnight courier service, mailed by certified or registered mail or sent by facsimile as follows:

(i)if to the Borrower, to it at Independent Bank Group, Inc., 7777 Henneman Way, McKinney, TX 75069, Attention: David Brooks, Chairman of the Board, Chief Executive Officer and President, Michelle Hickox, Executive Vice President & Chief Financial Officer, Telephone: 972 ###-###-####; Email: michelle.hickox@ifinancial.com;

(ii)if to the Administrative Agent, to it at U.S. Bank National Association, 333 Commerce Street, Suite 800, Nashville, TN 37201, Attention: Michael Trenkmann, Telephone: 615 ###-###-####; Email: michael.trenkmann@usbank.com; and

(iii)if to a Lender, to it at its address set forth in its Administrative Questionnaire.

Notices sent by hand or overnight courier service, or mailed by certified or registered mail, shall be deemed to have been given when received; notices sent by facsimile shall be deemed to have been given when sent (except that, if not given during normal business hours for the recipient, shall be deemed to have been given at the opening of business on the next Business Day for the recipient). Notices delivered through electronic communications to the extent provided in paragraph (b) below, shall be effective as provided in said paragraph (b).

Section 1.4    Schedule 5.1. Schedule 5.1 to the Credit Agreement is amended in its entirety to read as set forth in Schedule 5.1 to this Amendment.

SECTION 2.REPRESENTATIONS AND WARRANTIES. The Borrower hereby represents and warrants to the Lender and the Administrative Agent as of the date hereof as follows:

(i)    No Default or Event of Default has occurred or is continuing under the Credit Agreement, and no Default or Event of Default would result from the amendment contemplated hereby.

(ii)    The execution, delivery and performance by Borrower of this Amendment have been duly authorized by all necessary and proper corporate and other

proceedings and do not and will not require any registration with, consent or approval of, or notice to or action by any Person (including any Governmental Authority) in order to be effective and enforceable.

(iii)    This Amendment and the other Loan Documents (as amended by this Amendment) constitute the legal, valid and binding obligations of Borrower, enforceable against Borrower in accordance with their respective terms, except as enforceability may be limited by bankruptcy, insolvency or similar laws affecting the enforcement of creditors’ rights generally.

(iv)    The representations and warranties contained in Article V of the Credit Agreement are (x) with respect to any representations or warranties that contain a materiality qualifier, true and correct in all respects as of the date hereof (upon giving effect to this Amendment), except to the extent any such representation or warranty is stated to relate solely to an earlier date, in which case such representation or warranty shall have been true and correct in all respects on and as of such earlier date and (y) with respect to any representations or warranties that do not contain a materiality qualifier, true and correct in all material respects as of such Borrowing Date, except to the extent any such representation or warranty is stated to relate solely to an earlier date, in which case such representation or warranty shall have been true and correct in all material respects on and as of such earlier date.

(v)    Borrower is in compliance with all of the covenants contained in the Credit Agreement.

(vi)    Borrower’s Obligations under the Credit Agreement and under the other Loan Documents are not subject to any defense, counterclaim, set-off, right to recoupment, abatement or other claim.

SECTION 3.ADDITIONAL TERMS.

3.1Acknowledgement of Indebtedness under Credit Agreement. Borrower acknowledges and confirms that, as of the date hereof, Borrower is indebted to the Lender, without defense, setoff, or counterclaim, in the aggregate principal amount of $12,011,667 under the Credit Agreement.

3.2The Credit Agreement. On and after the Effective Date: (i) each reference in the Credit Agreement to “this Agreement,” “hereunder,” “hereof,” “herein,” or words of like import shall mean and be a reference to the Credit Agreement as amended hereby, (ii) each reference to the Credit Agreement in all Loan Documents shall mean and be a reference to the Credit Agreement, as amended hereby, and (iii) this Amendment shall be deemed a “Loan Document” for the purposes of the Credit Agreement.

3.3 Amendment and Credit Agreement to be Read Together. This Amendment supplements and is hereby made a part of the Credit Agreement, and the Credit Agreement and this Amendment shall from and after the Effective Date be read together and shall constitute one agreement. Except as otherwise set forth herein, the Credit Agreement shall remain in full force and effect.

3.4Acknowledgements. Borrower acknowledges that (i) it has been advised by counsel of its choice of law with respect to this Amendment, the Credit Agreement, the other Loan Documents and the transactions contemplated hereby and thereby, (ii) any waiver of Borrower set forth herein has been knowingly and voluntarily made, and

(iii) the obligations of the Lender and the Administrative Agent hereunder shall be strictly construed and shall be expressly subject to Borrower’s compliance in all respects with the terms and conditions of the Credit Agreement.

3.5No Waiver. The execution, delivery and effectiveness of this Amendment shall not operate as a waiver of any Event of Default (including without limitation any Event of Default existing on the date hereof), nor operate as a waiver of any right, power or remedy of any Lender or the Administrative Agent (including without limitation any rights, powers or remedies of a Lender or the Administrative Agent with respect to any Event of Default existing on the date hereof), nor constitute a waiver of, or consent to any departure from, any provision of the Credit Agreement, or any of the other Loan Documents.

3.6No Novation. The terms and conditions of the Credit Agreement are amended as set forth in this Amendment. It is expressly understood and acknowledged that nothing in this Amendment shall be deemed to cause or otherwise give rise to a novation of the indebtedness contemplated in the Credit Agreement. All of Borrower’s “Obligations” under the Credit Agreement shall in all respects be continuing and this Amendment shall not be deemed to evidence or result in a novation or repayment and re-borrowing of such “Obligations.”

SECTION 4.CONDITIONS PRECEDENT. The amendments set forth in SECTION 1 above shall become effective as of the date (the “Effective Date”) on which each of the following conditions shall have been satisfied: (i) Administrative Agent shall have received a fully executed Amendment and any other documents to be executed, delivered, or performed in connection with this Amendment (the “Amendment Documents”); and (ii) the Administrative Agent shall have received all fees and other amounts due and payable on or prior to the Effective Date.

SECTION 5.RELEASE. BORROWER, FOR ITSELF AND ITS SUCCESSORS AND ASSIGNS, DOES HEREBY FULLY, FINALLY AND UNCONDITIONALLY RELEASE AND FOREVER DISCHARGE, AND AGREES TO HOLD HARMLESS, THE LENDER, THE ADMINISTRATIVE AGENT AND EACH OF THEIR RESPECTIVE EQUITY HOLDERS AND AFFILIATES, AND THEIR RESPECTIVE AGENTS, ADVISORS, MANAGERS, PARENTS, SUBSIDIARIES, ATTORNEYS, REPRESENTATIVES, EMPLOYEES, OFFICERS AND DIRECTORS, AND THE SUCCESSORS, ASSIGNS, HEIRS AND REPRESENTATIVES OF EACH OF THE FOREGOING, FROM ANY AND ALL DEBTS, CLAIMS, COUNTERCLAIMS, SETOFFS, OBLIGATIONS, DAMAGES, COSTS, ATTORNEYS’ FEES AND EXPENSES, SUITS, DEMANDS, LIABILITIES, ACTIONS, PROCEEDINGS AND CAUSES OF ACTION, IN EACH CASE WHETHER KNOWN OR UNKNOWN, CONTINGENT OR FIXED, DIRECT OR INDIRECT AND OF WHATEVER KIND, NATURE OR DESCRIPTION, AND WHETHER IN LAW OR IN EQUITY, UNDER CONTRACT, TORT, STATUTE OR OTHERWISE, THAT BORROWER HAS HERETOFORE HAD OR NOW OR HEREAFTER CAN, SHALL OR MAY HAVE BY REASON OF ANY ACT, OMISSION OR THING WHATSOEVER DONE OR OMITTED TO BE DONE ON OR PRIOR TO THE EFFECTIVE DATE ARISING OUT OF, CONNECTED WITH OR RELATED IN ANY WAY TO THIS AMENDMENT, THE CREDIT AGREEMENT, THE OTHER LOAN DOCUMENTS, THE TRANSACTIONS DESCRIBED THEREIN, THE REVOLVING LOANS, THE LENDER’S AND THE ADMINISTRATIVE AGENT’S ADMINISTRATION THEREOF, OR THE FINANCING OR BANKING RELATIONSHIPS OF BORROWER WITH THE LENDER AND THE ADMINISTRATIVE AGENT.

SECTION 6.MISCELLANEOUS.

6.1Entire Agreement; Successors. This Amendment (i) constitutes the entire understanding of the parties with respect to the subject matter hereof, and any other prior or contemporaneous agreements, whether written or oral, with respect hereto or thereto are expressly superseded hereby; and (ii) shall be binding upon and inure to the benefit of the successors and assigns of the parties hereto permitted pursuant to Article XIII of the Credit Agreement.

6.2Counterparts. This Amendment may be executed in any number of counterparts (which taken together shall constitute one and the same instrument) and by facsimile or electronic (.pdf) transmission, which facsimile or electronic (.pdf) signatures shall be considered original executed counterparts.

6.3GOVERNING LAW. THIS AMENDMENT SHALL BE CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS (WITHOUT REGARD TO THE CONFLICT OF LAWS PROVISIONS) OF THE STATE OF NEW YORK, BUT GIVING EFFECT TO FEDERAL LAWS APPLICABLE TO NATIONAL BANKS.

6.4CONSENT TO JURISDICTION. BORROWER HEREBY IRREVOCABLY SUBMITS TO THE EXCLUSIVE JURISDICTION OF ANY UNITED STATES FEDERAL OR STATE COURT SITTING IN NEW YORK, NEW YORK IN ANY ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS AMENDMENT AND BORROWER HEREBY IRREVOCABLY AGREES THAT ALL CLAIMS IN RESPECT OF SUCH ACTION OR PROCEEDING MAY BE HEARD AND DETERMINED IN ANY SUCH COURT AND IRREVOCABLY WAIVES ANY OBJECTION IT MAY NOW OR HEREAFTER HAVE AS TO THE VENUE OF ANY SUCH SUIT, ACTION OR PROCEEDING BROUGHT IN SUCH A COURT OR THAT SUCH COURT IS AN INCONVENIENT FORUM. NOTHING HEREIN SHALL LIMIT THE RIGHT OF THE ADMINISTRATIVE AGENT OR ANY LENDER TO BRING PROCEEDINGS AGAINST BORROWER IN THE COURTS OF ANY OTHER JURISDICTION. ANY JUDICIAL PROCEEDING BY BORROWER AGAINST THE ADMINISTRATIVE AGENT OR ANY LENDER OR ANY AFFILIATE OF THE ADMINISTRATIVE AGENT OR ANY LENDER INVOLVING, DIRECTLY OR INDIRECTLY, ANY MATTER IN ANY WAY ARISING OUT OF, RELATED TO, OR CONNECTED WITH THIS AMENDMENT SHALL BE BROUGHT ONLY IN A COURT IN NEW YORK, NEW YORK.

6.5WAIVER OF JURY TRIAL. BORROWER, THE ADMINISTRATIVE AGENT AND EACH LENDER HEREBY WAIVE TRIAL BY JURY IN ANY JUDICIAL PROCEEDING INVOLVING, DIRECTLY OR INDIRECTLY, ANY MATTER (WHETHER SOUNDING IN TORT, CONTRACT OR OTHERWISE) IN ANY WAY ARISING OUT OF, RELATED TO, OR CONNECTED WITH THIS AMENDMENT OR THE RELATIONSHIP ESTABLISHED HEREUNDER.

6.6SERVICE OF PROCESS. EACH PARTY HERETO IRREVOCABLY CONSENTS TO SERVICE OF PROCESS IN THE MANNER PROVIDED FOR NOTICES IN SECTION 14.1 (OTHER THAN TRANSMISSION BY FACSIMILE) OF THE CREDIT AGREEMENT WITH RESPECT TO THE MATTERS SET FORTH IN THIS AMENDMENT. NOTHING IN THIS WAIVER WILL AFFECT

THE RIGHT OF ANY PARTY HERETO TO SERVE PROCESS IN ANY OTHER MANNER PERMITTED BY APPLICABLE LAW.

IN WITNESS WHEREOF, Borrower, the Lender, and the Administrative Agent have executed this Amendment as of the date first above written.

IN WITNESS WHEREOF, Borrower, the Lender, and the Administrative Agent have executed this Amendment as of the date first above written.