Exhibit 1.1

$39,500,000

TRIUMPH BANCORP, INC.

(a Texas corporation)

4.875% Fixed-to-Floating Rate Subordinated Notes due November 27, 2029

UNDERWRITING AGREEMENT

November 21, 2019

KEEFE, BRUYETTE & WOODS, INC.

787 Seventh Avenue, 4th Floor

New York, New York 10019

As representative of the Underwriters listed in Schedule A hereto

Ladies and Gentlemen:

Triumph Bancorp, Inc., a Texas corporation (the “Company”), confirms its agreement (the “Agreement”) with Keefe, Bruyette & Woods, Inc. and each of the other Underwriters, if any, named in Schedule A hereto (collectively, the “Underwriters,” which term shall also include any underwriter substituted as hereinafter provided in Section 10 hereof), for whom Keefe, Bruyette & Woods, Inc. is acting as representatives (in such capacity, the “Representative”), with respect to the issue and sale by the Company and the purchase by the Underwriters, acting severally and not jointly, of $39,500,000 aggregate principal amount of its 4.875% Fixed-to-Floating Rate Subordinated Notes due November 27, 2029 (the “Securities”). The Securities will be issued in book-entry only form to Cede & Co. as nominee of The Depository Trust Company (“DTC”) pursuant to an Indenture, between the Company and Wells Fargo Bank, National Association, as Trustee (the “Trustee”), dated as of September 30, 2016 (the “Base Indenture”), as supplemented by a First Supplemental Indenture, dated September 30, 2016 (the “First Supplemental Indenture”), and as further supplemented by a second supplemental indenture thereto relating to the Securities, to be dated as of the Closing Time, between the Company and the Trustee (the “Second Supplemental Indenture” and, together with the Base Indenture, and the First Supplemental Indenture, the “Indenture”).

To the extent there are no additional underwriters listed on Schedule A, the term “Representative” as used herein shall mean you, as Underwriter, and the term “Underwriters” shall mean either the singular or the plural, as the context requires.

The Company has filed with the Securities and Exchange Commission (the “Commission”) a registration statement on Form S-3 (File No. 333-223411), including the related preliminary prospectus or prospectus covering the registration of certain securities, including the Securities, under the Securities Act of 1933, as amended (the “1933 Act”). Such registration statement has been declared effective by the Commission, the Indenture has been duly qualified under the Trust Indenture Act of 1939, as amended (the “1939 Act”), and the Company has filed such post-effective amendments thereto as may be required prior to the execution of this Agreement and each such post-effective amendment is effective under the 1933 Act. Such registration statement, at any given time, including any amendments thereto existing at such time, the exhibits and any schedules thereto on file with the Commission at such time, the information incorporated by reference therein pursuant to Item 12 of Form S-3 under the 1933 Act at such time and the information otherwise deemed to be a part thereof or included therein at such time by the rules and regulations of the Commission under the 1933 Act (the “1933 Act Regulations”), is referred to herein as the “Registration Statement.” In the event that the Company shall file a registration statement pursuant to Rule 462(b) under the 1933 Act (a “Rule 462(b) Registration Statement”) in connection with the offering of the Notes, then, from and after the date of such filing, all references herein to the “Registration Statement” shall be deemed to mean and include such Rule 462(b) Registration Statement, mutatis

mutandis, unless otherwise expressly stated or the context otherwise requires. The Company will prepare and file a prospectus supplement relating to the Securities with the Commission in accordance with the provisions of Rule 430B of the 1933 Act Regulations (“Rule 430B”) and paragraph (b) of Rule 424 of the 1933 Act Regulations (“Rule 424(b)”). Any information included in such prospectus supplement that was omitted from the Registration Statement or any post-effective amendment thereto that is deemed to be part thereof and included therein pursuant to Rule 430B is referred to herein as “Rule 430B Information.” The final prospectus and prospectus supplement used in connection with the offering of the Securities, including the documents incorporated by reference or deemed to be incorporated by reference therein pursuant to Item 12 of Form S-3 under the 1933 Act, in the form first furnished to the Underwriters for use in connection with the offering of the Securities, are referred to herein collectively as the “Prospectus.” Each prospectus and prospectus supplement used in connection with the offering of the Securities that omitted the Rule 430B Information is herein called a “preliminary prospectus.” For purposes of this Agreement, all references to the Registration Statement, any preliminary prospectus, the Prospectus or any amendment or supplement to any of the foregoing shall be deemed to include any copy filed with the Commission pursuant to its Electronic Data Gathering, Analysis and Retrieval system (“EDGAR”).

All references in this Agreement to financial statements and schedules and other information which is “contained,” “included” or “stated” (or other references of like import) in the Registration Statement, any preliminary prospectus or the Prospectus shall be deemed to include all such financial statements and schedules and other information which are incorporated by reference in, or otherwise deemed by the 1933 Act Regulations to be part of or included in, the Registration Statement, any preliminary prospectus or the Prospectus, as the case may be, prior to the execution of this Agreement; and all references in this Agreement to amendments or supplements to the Registration Statement, any preliminary prospectus or the Prospectus shall be deemed to include the filing of any document under the Securities Exchange Act of 1934, as amended (the “1934 Act”), which is incorporated by reference in or otherwise deemed by the 1933 Act Regulations to be a part of or included in the Registration Statement, such preliminary prospectus or the Prospectus, as the case may be, after the execution of this Agreement.

SECTION 1. Representations and Warranties.

(a) Representations and Warranties by the Company. The Company represents and warrants to each Underwriter, as of the date hereof, at the Applicable Time (as defined herein) and at the Closing Time (as defined in Section 2(b)), and agrees with each Underwriter, as follows:

(i) Not an “Ineligible Issuer”. (A) At the time of filing the Registration Statement, (B) at the time of each subsequent amendment to the Registration Statement for the purposes of complying with Section 10(a)(3) of the 1933 Act (whether such amendment was by post-effective amendment, incorporated report filed pursuant to Section 13 or 15(d) of the 1934 Act or form of prospectus), and (C) at the date hereof, the Company was not an “ineligible issuer” as defined in Rule 405 of the 1933 Act Regulations (“Rule 405”). At the earliest time that the Company or another offering participant made a bona fide offer (within the meaning of Rule 164(h)(2) of the 1933 Act Regulations) of the Securities, the Company was not nor is it an “ineligible issuer” (as defined in Rule 405).

(ii) Registration Statement, Prospectus and Disclosure Package at Time of Sale. The Company meets the requirements for use of Form S-3 under the 1933 Act. The Registration Statement became effective on March 30, 2018, and any post-effective amendment thereto has become effective under the 1933 Act. No stop order suspending the effectiveness of the Registration Statement, including any Rule 462(b) Registration Statement, or any post-effective amendment thereto has been issued under the 1933 Act and no proceedings for that purpose have been instituted or are pending or, to the knowledge of the Company, are contemplated by the Commission, and the Company has complied with any requests on the part of the Commission for additional information with respect to the Registration Statement.

At the respective times the Registration Statement and any post-effective amendments thereto became effective, at each deemed effective date with respect to the Underwriters and the Securities pursuant to Rule 430B(f)(2) and at the Closing Time, the Registration Statement and any amendments thereto complied, complies and will comply, as the case may be, in all material respects with the requirements of the 1933 Act,

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the 1933 Act Regulations, the 1939 Act, and the rules and regulations of the Commission under the 1939 Act (the “1939 Act Regulations”), and neither the Registration Statement nor any amendment thereto contained, contains or will contain, as the case may be, an untrue statement of a material fact or omitted, omits or will omit, as the case may be, to state a material fact required to be stated therein or necessary to make the statements therein not misleading. Neither the General Disclosure Package (as defined below), at the Applicable Time, nor Prospectus at the Closing Time, included, includes or will include, as the case may be, an untrue statement of a material fact or omitted, omits or will omit, as the case may be, to state a material fact necessary in order to make the statements therein, in light of the circumstances under which they were made, not misleading. The preliminary prospectus and the Prospectus complied, when filed with the Commission, in all material respects with the 1933 Act, 1933 Act Regulations and the 1939 Act, and each preliminary prospectus and the Prospectus delivered to the Underwriters for use in connection with the offering of the Securities was identical to the electronically transmitted copies thereof filed with the Commission pursuant to EDGAR, except to the extent permitted by Regulation S-T.

As of the Applicable Time (as defined below), each Issuer-Represented Free Writing Prospectus (as defined below) and the Statutory Prospectus (as defined below), all considered together (collectively, the “General Disclosure Package”), did not include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading.

The representations and warranties in this subsection shall not apply to statements in or omissions from the Registration Statement or the Prospectus or the General Disclosure Package or any amendment or supplement thereto made in reliance upon and in conformity with written information furnished to the Company by any Underwriter through the Representative expressly for use in the Registration Statement or the Prospectus or any amendment or supplement thereto. For purposes of this Agreement, the only information so furnished shall be the information in the second and third sentences of the third paragraph, the third sentence in the first paragraph under the subheading “No Public Trading Market” and the first and sixth sentences under the subheading “Stabilization,” each under the heading “Underwriting,” in each case, contained in the Registration Statement, the Prospectus or the General Disclosure Package (collectively, the “Underwriter Information”).

As used in this subsection and elsewhere in this Agreement:

“Applicable Time” means 3:30 p.m. (New York City time) on November 21, 2019 or such other time as agreed by the Company and the Representative.

“Statutory Prospectus,” at any given time, means the base prospectus that is included in the Registration Statement and the preliminary prospectus supplement relating to the Securities immediately prior to that time, including the documents incorporated by reference therein at such time. For purposes of this definition, information contained in a form of prospectus that is deemed retroactively to be a part of the Registration Statement pursuant to Rule 430B shall be considered to be included in the Statutory Prospectus only at the actual time that such form of prospectus is filed with the Commission pursuant to Rule 424(b).

“Issuer-Represented Free Writing Prospectus” means any “issuer free writing prospectus,” as defined in (h)(i) of Rule 433 of the 1933 Act Regulations (“Rule 433”), relating to the Securities that (i) is required to be filed with the Commission by the Company, (ii) is a “road show that is a written communication” within the meaning of Rule 433(d)(8)(i), whether or not required to be filed with the Commission, or (iii) is exempt from filing with the Commission pursuant to Rule 433(d)(5)(i) because it contains a description of the Securities or of the offering that does not reflect the final terms, in each case in the form filed or required to be filed with the Commission or, if not required to be filed, in the form retained in the Company’s records pursuant to Rule 433(g).

Each Issuer-Represented Free Writing Prospectus, at its issue date and at all subsequent times through the completion of the offer and sale of the Securities or until any earlier date that the Company notified or notifies the Representative, did not, does not and will not include any information that conflicted, conflicts or will conflict with the information contained in the Registration Statement, the Statutory Prospectus or the Prospectus, including any document incorporated by reference therein and any preliminary or other prospectus deemed to be a part thereof that has not been superseded or modified.

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(iii) Incorporated Documents. The documents incorporated by reference in the preliminary prospectus, the General Disclosure Package and the Prospectus, when read together with the other information in the Registration Statement, at the time the Registration Statement became effective or such documents were filed with the Commission, as the case may be, did not, and at the Applicable Time did not and at the Closing Time will not include an untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in light of the circumstances under which they were made, not misleading. The documents incorporated or deemed to be incorporated by reference in the Prospectus, when filed with the Commission, conformed or will conform, as the case may be, in all material respects to the applicable requirements of the 1934 Act and the rules and regulations of the Commission thereunder (the “1934 Act Regulations”).

(iv) Independent Accountants. Crowe LLP, who certified the financial statements and supporting schedules of the Company included in the Prospectus, are independent public accountants as required by the 1933 Act and the 1933 Act Regulations and the rules of the Public Company Accounting Oversight Board and, to the Company’s knowledge, are not and have not been in violation of the auditor independence requirements of the Sarbanes Oxley Act of 2002 and the related rules and regulations of the Commission (the “Sarbanes-Oxley Act”) in respect of the entity whose financial statements it audited.

(v) Financial Statements. The financial statements included or incorporated by reference in the Registration Statement, the General Disclosure Package and the Prospectus, together with the related schedules and notes, present fairly, in all material respects, the financial condition, results of operations and cash flows of the Company and its consolidated subsidiaries, at the dates indicated and their respective statements of operations, stockholders’ equity and cash flows of the Company and its consolidated subsidiaries for the periods specified. Such financial statements have been prepared in compliance with the requirements of the 1933 Act and the 1934 Act and in conformity with accounting principles generally accepted in the United States of America (“GAAP”) applied on a consistent basis throughout the periods involved. Any selected financial data and the summary financial information included or incorporated by reference in the Registration Statement, the General Disclosure Package, preliminary prospectus and the Prospectus present fairly, in all material respects, the information shown therein and have been compiled on a basis consistent with that of the audited financial statements included or incorporated by reference in the Registration Statement, the General Disclosure Package and the Prospectus. The supporting schedules, if any, included therein present fairly, in all material respects, the information required to be stated therein. To the extent applicable, all disclosures contained in the Registration Statement, the General Disclosure Package or the Prospectus regarding “non-GAAP financial measures” (as such term is defined by the rules and regulations of the Commission) comply with Regulation G of the 1934 Act, the 1934 Act Regulations and Item 10 of Regulation S-K under the 1933 Act, as applicable, in all material respects. Except as included therein, no historical or pro forma financial statements or supporting schedules are required to be included or incorporated by reference in the Registration Statement, the General Disclosure Package or the Prospectus. The interactive data in eXtensible Business Reporting Language incorporated by reference in the Registration Statement, the General Disclosure Package and the Prospectus fairly presents the required information in all material respects and has been prepared in accordance with the Commission’s rules and guidelines applicable thereto.

(vi) Certain Data and Forward-Looking Statements. All statistical or market-related data included or incorporated by reference in the Registration Statement, the General Disclosure Package, and the Prospectus are based on or derived from sources that the Company reasonably believes to be reliable and accurate, and the Company has obtained the consent to the use of such data from such sources to the extent required. Each “forward-looking statement” (within the meaning of Section 27A of the 1933 Act or Section 21E of the 1934 Act) contained or incorporated by reference in the Registration Statement, the General Disclosure Package, preliminary prospectus and the Prospectus has been made or reaffirmed with a reasonable basis and in good faith.

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(vii) No Material Adverse Change in Business. Since the respective dates as of which information is given in the Registration Statement, the General Disclosure Package and the Prospectus, except as otherwise stated therein, (A) there has been no material adverse change, or any development that could reasonably be expected to have a material adverse change, in the condition, financial or otherwise, or in the earnings, properties, or business of the Company and its subsidiaries, considered as one enterprise, whether or not arising in the ordinary course of business (a “Material Adverse Effect”), (B) there have been no liabilities or obligations incurred, direct or contingent, nor transactions entered into by the Company or any of its subsidiaries, other than those in the ordinary course of business, which are material with respect to the Company and its subsidiaries considered as one enterprise, (C) there has not been any material change in the capital stock of the Company or any of its Significant Subsidiaries (as defined below) (other than transfers or issuances of capital stock in the ordinary course of business pursuant to the Company’s employee benefit plans or repurchases of common stock by the Company pursuant to a share repurchase program disclosed in the Prospectus) or any material increase in the long term indebtedness of the Company or its Significant Subsidiaries, and (D) except for regular quarterly dividends on the trust preferred securities issued by subsidiaries of the Company (the “trust preferred securities”), there has been no dividend or distribution of any kind declared, paid or made by the Company on any class of its capital stock (each of clauses (A), (B), (C) and (D), a “Material Adverse Change”).

(viii) Internal Accounting Controls. The Company and its subsidiaries maintain a system of internal accounting controls sufficient to provide reasonable assurance that (A) transactions are executed in accordance with the management’s general or specific authorizations, (B) transactions are recorded as necessary to permit preparation of financial statements in conformity with GAAP and to maintain asset accountability, (C) access to assets is permitted only in accordance with the management’s general or specific authorization, and (D) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences. The Company’s internal control over financial reporting is effective, and the Company is not aware of any material weaknesses in its internal control. Since the date of the Company’s latest audited financial statements incorporated by reference in the Registration Statement, the General Disclosure Package, and the Prospectus, there has been no change in the Company’s internal control over financial reporting that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

(ix) Disclosure Controls. The Company has established and maintains disclosure controls and procedures (as such term is defined in Rule 13a-15(e) and 15d-15(e) under the 1934 Act). Such disclosure controls and procedures (A) are designed to ensure that material information relating to the Company, including its consolidated subsidiaries, is made known to the Company’s Chief Executive Officer and its Chief Financial Officer by others within those entities, and (B) are effective to perform the functions for which they were established. The Company’s auditors and the Audit Committee of the Board of Directors have not been advised that there is (1) any fraud, whether or not material, that involves management or other employees who have a role in the Company’s internal controls, or (2) any material weaknesses in internal controls. Since the date of the most recent evaluation of such disclosure controls and procedures, there have been no significant changes in internal controls or in other factors that could significantly affect internal controls, including any corrective actions with regard to material weaknesses. The principal executive officer (or the equivalents) and principal financial officer (or the equivalent) of the Company have made all certifications required by the Sarbanes-Oxley Act, and the statements made in each such certification are accurate; the Company, its subsidiaries and to the Company’s knowledge, its directors and officers, are each in compliance in all material respects with the applicable provisions of the Sarbanes-Oxley Act.

(x) Regulatory Matters. The Company and its subsidiaries are in compliance in all material respects with all laws administered by and regulations of any Governmental Entity (as defined herein) applicable to it or to them (including, without limitation, all regulations and orders of, or agreements with, the Texas Department of Savings and Mortgage Lending, the Federal Deposit Insurance Corporation, the Board of Governors of the Federal Reserve System and the Office of Foreign Assets Control, the Equal Credit Opportunity Act, the Fair Housing Act, the Community Reinvestment Act, the Home Mortgage Disclosure Act, all other applicable fair lending laws or other laws relating to discrimination and the Bank Secrecy Act and Title III of the U.S.A. Patriot Act), the failure to comply with which would have a Material Adverse Effect. Except as disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, neither the Company nor any of its subsidiaries is subject or is party to, or has received any notice or advice

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that any of them may become subject or party to any investigation with respect to, any corrective, suspension or cease-and-desist order, agreement, consent agreement, memorandum of understanding or other regulatory enforcement action, proceeding or order with or by, or is a party to any commitment letter or similar undertaking to, or is subject to any directive by, or has been a recipient of any supervisory letter from, or has adopted any board resolutions at the request of, any Regulatory Agency (as defined below) that currently relates to or restricts in any material respect (considered on a consolidated basis) the conduct of their business or that in any manner relates to their capital adequacy, credit policies or management in any material respect (each, a “Regulatory Agreement”), nor has the Company or any of its subsidiaries been advised by any Regulatory Agency that it is considering issuing or requesting any such Regulatory Agreement. There is no unresolved violation, criticism or exception by any Regulatory Agency with respect to any report or statement relating to any examinations of the Company or any of its subsidiaries which, in the reasonable judgment of the Company, is expected to result in a Material Adverse Effect. As used herein, the term “Regulatory Agency” means any federal or state agency charged with the supervision or regulation of depositary institutions, or holding companies of depositary institutions, or engaged in the insurance of depositary institution deposits, or any court, administrative agency or commission or other Governmental Entity, authority or instrumentality having supervisory or regulatory authority with respect to the Company or any of its subsidiaries.

(xi) Regulatory Compliance. The deposit accounts of TBK Bank, SSB (the “Bank”) are insured up to the applicable limits by the Deposit Insurance Fund of the Federal Deposit Insurance Corporation (the “FDIC”) to the fullest extent permitted by law and the rules and regulations of the FDIC, and no proceeding for the revocation or termination of such insurance has been instituted or is pending or, to the knowledge of the Company, is threatened or contemplated.

(xii) Good Standing of the Company. The Company has been duly organized and is validly existing as a corporation in good standing under the laws of the State of Texas and has corporate power and authority to own, lease and operate its properties and to conduct its business as described in the Registration Statement, the General Disclosure Package and the Prospectus, and to enter into and perform its obligations under this Agreement, and to issue the Securities. The Company is duly qualified as a foreign corporation to transact business and is in good standing in each other jurisdiction in which such qualification is required, whether by reason of the ownership or leasing of property or the conduct of business, except where the failure so to qualify or to be in good standing would not result in a Material Adverse Effect.

(xiii) Corporate Existence of Subsidiaries. Each of the Company’s subsidiaries that is a “significant subsidiary” as defined in Rule 1-02 of Regulation S-X (each, a “Significant Subsidiary” and, collectively, the “Significant Subsidiaries”) has been duly organized and is validly existing under the laws of the jurisdiction of its incorporation or organization, has corporate power and authority to own, lease and operate its properties and to conduct its business as described in the Registration Statement, the General Disclosure Package and the Prospectus and is duly qualified as a foreign corporation to transact business and is in good standing in each jurisdiction in which such qualification is required, whether by reason of the ownership or leasing of property or the conduct of business, except where the failure so to qualify or to be in good standing would not result in a Material Adverse Effect. The Bank is a state savings bank chartered under the laws of the State of Texas and its charter is in full force and effect. With respect to each Significant Subsidiary of the Company, except as otherwise disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, all of the issued and outstanding shares of capital stock of such Significant Subsidiary have been duly authorized and validly issued, are fully paid and non-assessable and, except for the trust preferred securities, are owned by the Company, directly or through subsidiaries, free and clear of any security interest, mortgage, pledge, lien, encumbrance, claim or equity, and none of the outstanding shares of capital stock of any Significant Subsidiary were issued in violation of any preemptive or similar rights of any security holder of such Significant Subsidiary.

(xiv) Authorization of Agreement. This Agreement has been duly authorized, executed and delivered by the Company. When duly executed by the Underwriters, this Agreement will constitute a valid and legally binding agreement of the Company, enforceable against the Company in accordance with its terms, except as may be limited by bankruptcy, insolvency (including, without limitation, all laws relating to fraudulent

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transfers), reorganization, moratorium or similar laws affecting enforcement of creditors’ rights generally or by general principles of equity (regardless of whether enforcement is considered in a proceeding in equity or at law), and subject to 12 U.S.C. § 1818(b)(6)(D) (or any successor statute) and similar bank regulatory powers and to the application of principles of public policy, and except as rights to indemnity or contribution, including but not limited to, indemnification provisions set forth in Section 6 of this Agreement, may be limited by federal or state securities law and the public policy underlying such laws.

(xv) Authorization of Indenture. The Indenture has been duly authorized, executed and delivered by the Company and constitutes a valid, legal and binding agreement of the Company, enforceable against the Company in accordance with its terms, except as may be limited by (a) bankruptcy, insolvency, reorganization, moratorium, fraudulent conveyance or other similar laws now or hereafter in effect relating to creditors’ rights generally, and (b) general principles of equity (regardless of whether enforceability is considered in a proceeding at law or in equity) (collectively, the “Enforceability Exceptions”).

(xvi) Authorization of the Securities. The Securities have been duly authorized by the Company and, at the Closing Time, will have been duly executed by the Company and, when authenticated in the manner provided for in the Indenture and delivered by the Company against payment therefor as described in the Prospectus or as contemplated in the Indenture, will constitute valid, legal and binding obligations of the Company, enforceable against the Company in accordance with their terms, except to the extent that enforceability may be limited by the Enforceability Exceptions; the Securities will be in the form contemplated by, and will be entitled to the benefits of, the Indenture.

(xvii) Description of the Securities and the Indenture. The Securities will conform in all material respects to the respective statements relating thereto contained in the Registration Statement, the General Disclosure Package and the Prospectus. The Indenture will conform in all material respects to the description thereof contained in the Registration Statement, General Disclosure Package, and the Prospectus.

(xviii) Absence of Defaults and Non-contravention. Neither the Company nor any of its subsidiaries is in violation of its charter or bylaws, in default in the performance or observance of any obligation, agreement, covenant or condition contained in any contract, indenture, mortgage, deed of trust, loan or credit agreement, note, lease or other agreement or instrument to which the Company or any of its subsidiaries is a party or by which it or any of them may be bound, or to which any of the property or assets of the Company or any subsidiary is subject, except for such violations or defaults that would not, individually or in the aggregate, result in a Material Adverse Effect, or in violation of any U.S. or non-U.S. federal, state or local statute or law (including, without limitation, common law) or ordinance, or any judgment, decree, rule, regulation, order or injunction of any U.S. or non-U.S. federal, state, local or other governmental or regulatory authority, governmental or regulatory agency or body, court, arbitrator or self-regulatory organization applicable to the Company or any of its subsidiaries or any of their respective properties, assets or operations (each, a “Governmental Entity”), except for any such default or violation that would not, individually or in the aggregate, have a Material Adverse Effect. The execution, delivery and performance of this Agreement, the issuance and sale of the Securities by the Company and the performance by the Company of all of its obligations under this Agreement and the consummation of the transactions contemplated herein, therein and in the Registration Statement, the General Disclosure Package and the Prospectus and compliance by the Company with its obligations hereunder and thereunder have been duly authorized by all necessary corporate action and do not and will not, whether with or without the giving of notice or passage of time or both, conflict with or constitute a breach of, or default or Repayment Event (as defined below) under, or result in the creation or imposition of any lien, charge or encumbrance upon any property or assets of the Company or any of its subsidiaries pursuant to, (A) any indenture, mortgage, deed of trust, loan agreement, note, lease or other agreement or instrument to which the Company or any of its subsidiaries is a party or by which the Company or any of its subsidiaries is bound or to which any of the property or assets of the Company or any of its subsidiaries is subject, (B) the provisions of the charter, bylaws or other organizational documents of the Company or any of its subsidiaries, or (C) any statute or any order, rule or regulation of any Governmental Entity having jurisdiction over the Company or any of its subsidiaries or any of their property, assets or operations except, with respect to clauses (A) and (C), for those conflicts, breaches, defaults, Repayment Events, liens, charges or encumbrances that would not, singly or in the aggregate, result in a Material Adverse

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Effect. As used herein, a “Repayment Event” means any event or condition which gives the holder of any note, debenture or other evidence of indebtedness (or any person acting on such holder’s behalf) the right to require the repurchase, redemption or repayment of all or a portion of such indebtedness by the Company or any of its subsidiaries.

(xix) Accuracy of Exhibits. There are no contracts or documents which are required to be described in the Registration Statement, the General Disclosure Package and the Prospectus or the documents incorporated by reference therein or to be filed as exhibits thereto which have not been so described and filed as required.

(xx) Absence of Labor Dispute. No labor dispute with the employees of the Company or any of its subsidiaries exists or, to the knowledge of the Company, is imminent, and the Company is not aware of any existing or imminent labor disturbance by the employees of the Company or any of its subsidiaries, which, in either case, would result in a Material Adverse Effect.

(xxi) Absence of Proceedings. There is no action, suit, proceeding, inquiry or investigation before or brought by any court or Governmental Entity, domestic or foreign, now pending, or, to the knowledge of the Company, threatened, against or affecting the Company or any of its subsidiaries, which (A) is required to be disclosed in the Registration Statement or the Prospectus (other than as disclosed therein), (B) would reasonably be expected to result in a Material Adverse Effect, or (C) might materially and adversely affect the assets or operations of the Company or any of its subsidiaries or the consummation of the transactions contemplated in this Agreement or the performance by the Company of its obligations hereunder. Except as described in the Registration Statement, the Prospectus and the General Disclosure Package, there are no legal or governmental proceedings to which the Company or any of its subsidiaries is a party or of which any of their respective assets is the subject, including ordinary routine litigation incidental to the business, which would, in the aggregate, reasonably be expected to have a Material Adverse Effect.

(xxii) Possession of Intellectual Property. The Company and its subsidiaries own or possess, or can acquire on reasonable terms, adequate patents, patent licenses, trademarks, service marks and trade names necessary to carry on their businesses as presently conducted and the Company and its subsidiaries have not received any notice of infringement of or conflict with asserted rights of others with respect to any patents, patent licenses, trademarks, service marks or trade names that, in the aggregate, if the subject of an unfavorable decision, ruling or finding, would have a Material Adverse Effect. Neither the Company nor any of its subsidiaries has infringed or is infringing on the intellectual property of a third party, and, except as are described in the Registration Statement, the General Disclosure Package and the Prospectus, neither the Company nor any of its subsidiaries has received notice of a claim by a third party to the contrary, except where such infringement would not, singly or in the aggregate, result in a Material Adverse Effect.

(xxiii) Possession of Licenses and Permits. The Company and its subsidiaries possess such permits, licenses, approvals, consents and other authorizations (collectively, “Governmental Licenses”) issued by the appropriate Governmental Entities necessary to conduct the business now operated by them, and as described in the Registration Statement, the Prospectus and the General Disclosure Package, and have made all declarations and filings with the appropriate Governmental Entities that are necessary for the conduct of their respective businesses as described in the Registration Statement, the Prospectus and the General Disclosure Package, except where the failure so to possess such Governmental Licenses or make such declarations or filings would not, singly or in the aggregate, result in a Material Adverse Effect. The Company and its subsidiaries are in compliance with the terms and conditions of all such Governmental Licenses, except where the failure to so comply would not, singly or in the aggregate, result in a Material Adverse Effect. All of the Governmental Licenses are valid and in full force and effect, except where the invalidity of such Governmental Licenses or the failure of such Governmental Licenses to be in full force and effect would not, singly or in the aggregate, result in a Material Adverse Effect. Neither the Company nor any of its subsidiaries has received any notice of proceedings relating to the revocation or modification of any such Governmental Licenses which, singly or in the aggregate, if the subject of an unfavorable decision, ruling or finding, would result in a Material Adverse Effect.

(xxiv) Title to Property. The Company and its subsidiaries have good and marketable title to all real property owned by the Company and its subsidiaries and good title to all other properties owned by them, in each case, free and clear of all mortgages, pledges, liens, security interests, claims, restrictions or

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encumbrances of any kind except such as (A) would not materially interfere with the use made and proposed to be made of such property by the Company or such subsidiary, or (B) would not have a Material Adverse Effect. All of the leases and subleases material to the business of the Company and its subsidiaries, considered as one enterprise, and under which the Company or any of its subsidiaries holds properties described in the Registration Statement, the General Disclosure Package and the Prospectus, are in full force and effect, and neither the Company nor any subsidiary has any notice of any material claim of any sort that has been asserted by anyone adverse to the rights of the Company or any subsidiary under any such lease or sublease or affecting or questioning the rights of the Company or such subsidiary to the continued possession of the leased or subleased premises under any such lease or sublease and that, in any such case, would have a Material Adverse Effect.

(xxv) Absence of Manipulation. Neither the Company nor any affiliate of the Company has taken, nor will the Company or any affiliate take, directly or indirectly, any action which is designed to or which has constituted or which would be expected to cause or result in the unlawful stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Securities.

(xxvi) Absence of Further Requirements. No filing with, or consent, approval, authorization, order, license, registration, qualification or decree of or with any Governmental Entity, other than those that have been made or obtained, is necessary or required in connection with the due authorization, execution and delivery of this Agreement or for the offering, issuance, sale or delivery of the Securities, the performance by the Company of its obligations hereunder or the consummation by the Company of the transactions contemplated by this Agreement, except as may be required by the securities or Blue Sky laws of the various states and other jurisdictions.

(xxvii) Investment Company Act. The Company is not required, and upon the issuance and sale of the Securities as herein contemplated and the application of the net proceeds therefrom as described in the Registration Statement, the General Disclosure Package and the Prospectus will not be required, to register as an “investment company” under the Investment Company Act of 1940, as amended.

(xxviii) Environmental Laws. The Company and its subsidiaries are (A) in compliance with any and all applicable foreign, federal, state and local laws and regulations relating to the protection of human health and safety, the environment or hazardous or toxic substances or wastes, pollutants or contaminants (“Environmental Laws”), (B) have received and are in compliance with all permits, licenses or other approvals required of them under applicable Environmental Laws to conduct their respective businesses, and (C) have not received notice of any actual or potential liability for the investigation or remediation of any disposal or release of hazardous or toxic substances or wastes, pollutants or contaminants, except where such non-compliance with Environmental Laws, failure to receive required permits, licenses or other approvals, or liability would not have a Material Adverse Effect.

(xxix) Compliance with Money Laundering Laws. Except as otherwise disclosed in all material respects in the Registration Statement, the Prospectus and the General Disclosure Package, the operations of the Company and its subsidiaries are and, to the knowledge of the Company and its subsidiaries, have been conducted at all times in compliance with applicable financial recordkeeping and reporting requirements of the Currency and Foreign Transactions Reporting Act of 1970, as amended, the money laundering statutes of all applicable jurisdictions, the rules and regulations thereunder and any related or similar rules, regulations or guidelines issued, administered or enforced by any governmental agency (collectively, the “Money Laundering Laws”), and no action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving the Company or its subsidiaries with respect to the Money Laundering Laws is pending or, to the knowledge of the Company or its subsidiaries, threatened.

(xxx) Compliance with OFAC. Neither the Company nor any of its subsidiaries nor, to the Company’s knowledge, any director, officer, agent, employee or controlled affiliate of the Company or any of its subsidiaries or other person acting on their behalf is currently subject to any U.S. sanctions administered by the Office of Foreign Assets Control of the U.S. Treasury Department (“OFAC”); and the Company will not knowingly directly or indirectly use the proceeds of the transactions contemplated hereby, or lend, contribute or otherwise make available such proceeds to any subsidiary, joint venture partner or other person or entity, for the purpose of financing the activities of or business with any person, or in any country or territory, that currently is the subject to any U.S. sanctions administered by OFAC.

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(xxxi) Insurance. The Company and each of its subsidiaries are insured by insurers of recognized financial responsibility against such losses and risks and in such amounts as are prudent and customary in the business in which they are engaged. Neither the Company nor any of its subsidiaries has been refused any insurance coverage sought or applied for. Neither the Company nor any of its subsidiaries has any reason to believe that it will not be able to renew its existing insurance coverage as and when such coverage expires or to obtain similar coverage from similar insurers as may be necessary to continue its business at a cost that would not have a Material Adverse Effect.

(xxxii) Capitalization. The authorized and outstanding capitalization and consolidated long term debt (i.e., a maturity greater than one year) of the Company is as set forth in the Registration Statement, the General Disclosure Package and the Prospectus. There have not been any subsequent issuances of capital stock of the Company since such date. There have not been any additional long term borrowings by the Company or its consolidated subsidiaries since such date, except with respect to advances or securities sold under agreements to repurchase by the Bank in its ordinary course of business.

(xxxiii) Dividends. No subsidiary of the Company is subject to any material direct or indirect prohibition on paying any dividends to the Company, on making any other distribution on such subsidiary’s capital stock, on repaying to the Company any loans or advances to such subsidiary from the Company or on transferring any of such subsidiary’s property or assets to the Company or any other subsidiary of the Company, except as described in the Registration Statement, the General Disclosure Package and the Prospectus.

(xxxiv) Taxes. All material tax returns required to be filed by the Company or any of its subsidiaries have been timely filed, and all taxes and other assessments of a similar nature (whether imposed directly or through withholding) including any interest, additions to tax or penalties applicable thereto due or claimed to be due from such entities have been timely paid, other than those being contested in good faith and for which adequate reserves have been provided or which if not paid, would not individually or in the aggregate, result in a Material Adverse Effect.

(xxxv) Foreign Corrupt Practices Act. Neither the Company nor any of its subsidiaries nor, to the knowledge of the Company, any director, officer, agent, employee or affiliate of the Company or any of its subsidiaries, is aware of or has taken any action, directly or indirectly, that would result in a violation by such persons of the Foreign Corrupt Practices Act of 1977, as amended, and the rules and regulations thereunder, and the Company and its subsidiaries have instituted and maintain policies and procedures designed to ensure continued compliance therewith.

(xxxvi) Derivative Financial Instruments. Any and all material swaps, caps, floors, futures, forward contracts, option agreements (other than stock options issued to the Company’s employees, directors, agents or consultants) and other derivative financial instruments, contracts or arrangements, whether entered into for the account of the Company or one of its subsidiaries or for the account of a customer of the Company or one of its subsidiaries, were entered into in the ordinary course of business and in accordance with applicable laws, rules, regulations and policies of all applicable regulatory agencies and with counterparties believed by the Company to be financially responsible at the time. The Company and each of its subsidiaries have duly performed in all material respects all of their obligations thereunder to the extent that such obligations to perform have accrued, and there are no breaches, violations or defaults or allegations or assertions of such by any party thereunder which would, singly or in the aggregate, reasonably be expected to result in a Material Adverse Effect.

(xxxvii) ERISA. Each of the Company, the Company’s subsidiaries and their respective “ERISA Affiliates” (as defined below) are in compliance in all material respects with all applicable provisions of the Employee Retirement Income Security Act of 1974, as amended, including the regulations and published interpretations thereunder (collectively, “ERISA”). No “reportable event” (as defined in ERISA) has occurred with respect to any “employee benefit plan” (as defined in ERISA) for which the Company, any of the Company’s subsidiaries or their respective ERISA Affiliates would have any liability. None of the Company, the Company’s subsidiaries or their respective ERISA Affiliates have incurred, or expect to incur, material liability under (i) Title IV of ERISA with respect to termination of, or withdrawal from, any “employee

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benefit plan” or (ii) Sections 412, 4971, 4975 or 4980B of the United States Internal Revenue Code of 1986, as amended, and the regulations and published interpretations thereunder (collectively, the “Code”). Each “employee benefit plan” for which the Company, any of the Company’s subsidiaries or any of their respective ERISA Affiliates would have any liability that is intended to be qualified under Section 401(a) of the Code is so qualified in all material respects and, to the Company’s knowledge, nothing has occurred, whether by action or by failure to act, which would cause the loss of such qualification. “ERISA Affiliate” means, with respect to the Company or any of its subsidiaries, any member of any group of organizations described in Sections 414(b), (c), (m) or (o) of the Code or Section 4001(b) of ERISA of which the Company or such subsidiary is a member.

(xxxviii) Bank Holding Company Act; Banking Regulation. The Company is duly registered as a bank holding company under the Bank Holding Company Act of 1956, as amended (the “BHC Act”), and the Company has duly elected to be a financial holding company under the BHC Act. The Bank holds the requisite authority to do business as a validly existing state savings bank chartered under the laws of the State of Texas.

(xxxix) Certain Transactions. Neither the Company nor any of its subsidiaries has participated in any listed transaction, as defined in Treasury Regulation Section 1.6011-(4)(b)(2).

(xl) Unlawful Payments. None of the Company, any of the Company’s subsidiaries or, to the knowledge of the Company, any affiliate of the Company or any of its subsidiaries has: (A) used any corporate funds for any unlawful contribution, gift, entertainment or other unlawful expense relating to political activity; (B) made any direct or indirect unlawful payment to any foreign or domestic government official or employee from corporate funds; or (C) made any bribe, rebate, payoff, influence payment, kickback or other unlawful payment.

(xli) Pending Procedures and Examinations. The Registration Statement is not the subject of a pending proceeding or examination under Section 8(d) or 8(e) of the 1933 Act, and the Company is not the subject of a pending proceeding under Section 8A of the 1933 Act in connection with the offering of the Securities.

(xlii) No Unauthorized Dissemination of Materials. Neither the Company nor any of the Company’s subsidiaries or other affiliates has distributed or prior to the completion of the distribution of the Securities, will distribute any prospectus (as such term is defined in the 1933 Act and the 1933 Act Regulations) in connection with the offering and sale of the Securities other than the Registration Statement, any preliminary prospectus, the General Disclosure Package, the Prospectus or other materials, if any, permitted by the 1933 Act or by the 1933 Act Regulations and approved by the Representative in accordance with Section 3(k) hereof.

(xliii) Transactions. Except as disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, neither the Company nor any of its subsidiaries is a party to a letter of intent, accepted term sheet or similar instrument or any binding agreement that contemplates an acquisition, disposition, transfer or sale of the assets (as a going concern) or capital stock of the Company or of any subsidiary or business unit or any similar business combination transaction which would be material to the Company and its subsidiaries taken as a whole.

(xliv) Broker Fees. Other than as contemplated by this Agreement, there is no broker, finder or other party that is entitled to receive from the Company or any of the Company’s subsidiaries any brokerage or finder’s fee or commission as a result of the transactions contemplated by this Agreement.

(xlv) No Registration Rights. No person has the right to require the Company or any of its subsidiaries to register any securities for sale under the 1933 Act by reason of the filing of the Registration Statement with the Commission or the issuance and sale of the Securities to be sold by the Company hereunder.

(xlvi) Off-Balance Sheet Transactions. There is no transaction, arrangement or other relationship between the Company or any of its Subsidiaries and an unconsolidated or other off-balance sheet entity which is required to be disclosed in the Registration Statement, the General Disclosure Package and the Prospectus (other than as disclosed therein).

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(xlvii) Cybersecurity. (A) There has been no security breach or incident, unauthorized access or disclosure, or other compromise of or relating to any of the Company’s or its Subsidiaries’ information technology and computer systems, networks, hardware, software, data and databases, including the data and information of their respective customers, employees, suppliers, vendors and any third party data maintained, processed or stored by the Company and its Subsidiaries, and any such data processed or stored by third parties on behalf of the Company and its Subsidiaries, equipment or technology (collectively, “IT Systems and Data”) that would, singly or in the aggregate, reasonably be expected to have a Material Adverse Effect; and (B) neither the Company nor its Subsidiaries have been notified in writing of any security breach or incident, unauthorized access or disclosure or other compromise to their IT Systems and Data that would, singly or in the aggregate, reasonably be expected to have a Material Adverse Effect.

(xlviii) Compliance with the Sarbanes-Oxley Act. The Company is in compliance in all material respects with any provision of the Sarbanes-Oxley Act and the rules and regulations promulgated in connection therewith, including Section 402 related to loans and Sections 302 and 906 related to certifications.

(b) Officer’s Certificates. Any certificate signed by any officer of the Company delivered to the Representative or to counsel for the Underwriters shall be deemed a representation and warranty by the Company to each Underwriter as to the matters covered thereby on the date of such certificate.

SECTION 2. Sale and Delivery to Underwriters; Closing.

(a) Sale and Purchase. On the basis of the representations and warranties herein contained and subject to the terms and conditions herein set forth, the Company agrees to sell to each Underwriter, severally and not jointly, and each Underwriter, severally and not jointly, agrees to purchase from the Company, the aggregate principal amount of Securities set forth in Schedule A opposite the name of such Underwriter, at a purchase price equal to 98.50% of the aggregate principal amount thereof.

(b) Payment. Delivery of the Securities shall be made at the offices of Norton Rose Fulbright US LLP, 2200 Ross Avenue, Dallas, Texas, 75201, or at such other place as shall be agreed upon by the Representative and the Company, at 9:00 a.m. (central time) on November 27, 2019 (unless postponed in accordance with the provisions of Section 10), or such other time not later than ten business days after such date as shall be agreed upon by the Representative and the Company (such time and date of payment and delivery being herein called “Closing Time”).

It is understood that each Underwriter has authorized the Representative, for its account, to accept delivery of, receipt for, and make payment of the purchase price for, the Securities which it has agreed to purchase. Keefe, Bruyette & Woods, Inc., individually and not as representatives of the Underwriters, may (but shall not be obligated to) make payment of the purchase price for the Securities to be purchased by any Underwriter whose funds have not been received by the Closing Time, but such payment shall not relieve such Underwriter from its obligations hereunder.

Payment for the purchase price of the Securities shall be made by the Representative to the Company by wire transfer of immediately available funds to a bank account designated by the Company, against delivery to the Representative for the respective accounts of the Underwriters of the Securities to be purchased by them.

In performing its duties under this Agreement, the Underwriters shall be entitled to rely upon any notice, signature or writing that the Underwriters shall in good faith believe to be genuine and to be signed or presented by a proper party or parties. The Underwriters may rely upon any opinions or certificates or other documents delivered by the Company or its counsel or designees to them.

SECTION 3. Covenants of the Company. The Company covenants with each Underwriter as follows:

(a) Compliance with Securities Regulations and Commission Requests. The Company will notify the Representative promptly, and confirm the notice in writing, (i) when any post-effective amendment to the Registration Statement or a new registration statement relating to the Securities shall become effective, or any amendment or supplement to the Prospectus or any amended Prospectus shall have been filed, (ii) of the receipt of

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any comments with respect to the Registration Statement from the Commission, (iii) of any request by the Commission for any amendment to the Registration Statement or the filing of a new registration statement or any amendment or supplement to the Prospectus or any document incorporated therein by reference or otherwise deemed to be a part thereof or for additional information, (iv) of the issuance by the Commission of any stop order suspending the effectiveness of the Registration Statement or such new registration statement or of any order of any Governmental Entity preventing or suspending the use of any preliminary prospectus or the Prospectus, or of the suspension of the qualification of the Securities for offering or sale in any jurisdiction, or of the initiation or threatening of any proceedings for any of such purposes or of any examination pursuant to Section 8(e) of the 1933 Act concerning the Registration Statement, and (v) if the Company becomes the subject of a proceeding under Section 8A of the 1933 Act. With respect to the Securities, subject to Section 3(e), the Company will comply with the requirements of Rule 430B, will prepare the Prospectus in the form approved by the Representative, will affect the filings required under Rule 424(b) in the manner and within the time period specified therein (without reliance on Rule 424(b)(8)) and will take such steps as it deems necessary to ascertain promptly whether the Prospectus transmitted for filing under Rule 424(b) under the 1933 Act Regulations was received for filing by the Commission and, in the event that it was not, it will promptly file such Prospectus. The Company will use its commercially reasonable efforts to prevent the issuance of any stop order or other order and, if any stop order or other order is issued, to obtain the lifting thereof as soon as possible. The Company shall pay the required filing fees of the Commission relating to the Securities within the time required by Rule 456(b)(1)(i) of the 1933 Act Regulations without regard to the proviso therein and otherwise in accordance with Rules 456(b) and 457(r) of the 1933 Act Regulations.

(b) Delivery of Registration Statements. The Company has furnished or will deliver to the Representative and counsel for the Underwriters, without charge, copies of the signed Registration Statement as originally filed and of each amendment thereto (including exhibits filed therewith or incorporated by reference therein and documents incorporated by reference therein) and copies of all signed consents and certificates of experts, and will also deliver to the Representative, without charge, a conformed copy of the Registration Statement as originally filed and of each amendment thereto (without exhibits) for each of the Underwriters. The copies of the Registration Statement and each amendment thereto furnished to the Underwriters will be identical to the electronically transmitted copies thereof filed with the Commission pursuant to EDGAR, except to the extent permitted by Regulation S-T.

(c) Delivery of Prospectuses. The Company has delivered to each Underwriter, without charge, as many copies of each preliminary prospectus and the Statutory Prospectus as such Underwriter reasonably requested, and the Company hereby consents to the use of such copies for purposes permitted by the 1933 Act. The Company will furnish to each Underwriter, without charge, during the period when the Prospectus is required to be delivered under the 1933 Act, such number of copies of the Prospectus (as amended or supplemented) as such Underwriter may reasonably request. The preliminary prospectus, the Statutory Prospectus, the Prospectus and any amendments or supplements thereto furnished to the Underwriters will be identical to the electronically transmitted copies thereof filed with the Commission pursuant to EDGAR, except to the extent permitted by Regulation S-T.

(d) Continued Compliance with Securities Laws. The Company will comply with the 1933 Act, the 1933 Act Regulations, the 1934 Act, the 1934 Act Regulations, the 1939 Act and the 1939 Act Regulations, as applicable so as to permit the completion of the distribution of the Securities as contemplated in this Agreement and in the Prospectus. Prior to the Closing Time, the Company will immediately notify the Representative, and confirm such notice in writing, of (x) any filing made by the Company of information relating to the offering of the Securities with any securities exchange or any other regulatory body in the United States, and (y) any event or condition that results or is reasonably likely to result in a Material Adverse Change, which (i) makes any statement in the Prospectus false or misleading, or (ii) which is not disclosed in the Prospectus. If, at any time when a prospectus is required by the 1933 Act to be delivered in connection with sales of the Securities, any event or development occurs as a result of which it is necessary, in the reasonable opinion of the Company or its counsel to amend or supplement the Prospectus in order that the Prospectus not include any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein not misleading in light of the circumstances existing at the time it is delivered to purchasers, or if for any other reason it shall be necessary, in the reasonable opinion of the Company or its counsel, during such period to amend the Registration Statement or

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to file a new registration statement or to amend or supplement the Prospectus to comply with the 1933 Act or the 1933 Act Regulations, the Company promptly will (1) notify the Representative of any such event or development, (2) prepare and file with the Commission, subject to Section 3(e) hereof, such amendment, supplement or new registration statement which will correct such untrue statement or omission, effect such compliance or satisfy such filing requirement, (3) use its best efforts to have any such amendment to the Registration Statement or new registration statement declared effective as soon as possible (if not an automatic shelf registration statement), and (4) supply any amended or supplemented General Disclosure Package or Prospectus to the Underwriters in such quantities as they may reasonably request. If at any time following the issuance of an Issuer-Represented Free Writing Prospectus there occurred or occurs an event or development as a result of which the General Disclosure Package or such Issuer-Represented Free Writing Prospectus, individually or together with other information that is part of the General Disclosure Package, as the case may be, conflicted or would conflict with the information contained in the Registration Statement (or any other registration statement relating to the Securities), any preliminary prospectus, the Statutory Prospectus or the Prospectus or included, includes or would include an untrue statement of a material fact or omitted, omits or would omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances prevailing at that subsequent time, not misleading, the Company will promptly notify the Underwriters and will promptly amend or supplement, at its own expense, the General Disclosure Package or such Issuer-Represented Free Writing Prospectus to eliminate or correct such conflict, untrue statement or omission. The Underwriters’ delivery of any such amendment or supplement shall not constitute a waiver of any of the conditions of Section 5 hereof.

(e) Amendment to Prospectus or Registration Statement. Prior to the Closing Time, the Company will advise the Representative promptly of any notice of its intention to file or prepare any amendment to the Registration Statement or a new registration statement relating to the Securities or any amendment or supplement to any preliminary prospectus or the Prospectus and will furnish the Representative with copies thereof a reasonable amount of time prior to such proposed filing or use, as the case may be, and will not file or use any such document with respect to the Securities without the consent of the Representative, which consent shall not be unreasonably withheld. Neither the consent of the Representative, nor the Representative’s delivery of any such amendment or supplement, shall constitute a waiver of any of the conditions set forth in Section 5 hereof. For purposes of clarity, nothing in this Section 3(e) shall restrict the Company from making any filings required in order to comply with its reporting obligations under the 1934 Act or the 1934 Act Regulations.

(f) DTC. The Company will cooperate with the Underwriters and use its commercially reasonable efforts to permit the Securities to be eligible for clearance, settlement and trading through the facilities of DTC.

(g) Blue Sky Compliance. The Company will qualify the Securities for offer and sale under the state securities, or blue sky, laws of such jurisdictions as the Representative shall reasonably request and will continue such qualifications in effect so long as required for the offering and resale of the Securities; provided that the Company shall not be required to (i) qualify as a foreign corporation or other entity or as a dealer in securities in any jurisdiction in which it is not so qualified, (ii) file any general consent to service of process in any such jurisdiction, or (iii) subject itself to taxation in any jurisdiction in which it is not otherwise so subject.

(h) Rule 158. The Company will timely file such reports pursuant to the 1934 Act as are necessary in order to make generally available to its security holders as soon as practicable an earnings statement for the purposes of, and to provide the benefits contemplated by, the last paragraph of Section 11(a) of the 1933 Act.

(i) Use of Proceeds. The Company will use the net proceeds received by it from the sale of the Securities in the manner specified in the Registration Statement, the General Disclosure Package and the Prospectus.

(j) Restriction on Sale of Securities. Until the Closing Time, the Company will not, without the prior written consent of the Underwriters, directly or indirectly, issue, sell, offer or contract to sell, grant any option for the sale of, or otherwise transfer or dispose of, any debt securities or nonconvertible preferred stock, including any guarantee of such securities, or any securities convertible into or exchangeable for or representing the right to receive such securities, other than the Securities (except for the issuance of the Securities issued pursuant to this Agreement).

(k) Issuer-Free Writing Prospectus. The Company represents and agrees that, unless it obtains the prior written consent of the Representative and each Underwriter represents and agrees that, unless it obtains the prior

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written consent of the Company and the Representative, it has not made and will not make any offer relating to the Securities that would constitute an “issuer free writing prospectus,” as defined in Rule 433, or that would otherwise constitute a “free writing prospectus,” as defined in Rule 405, required to be filed with the Commission. Any such free writing prospectus, if any, consented to by the Company and the Representative is referred to herein as an “Issuer-Permitted Free Writing Prospectus.” The Company represents that it has treated or agrees that it will treat each Issuer-Permitted Free Writing Prospectus as an “issuer free writing prospectus,” as defined in Rule 433, and has complied and will comply with the requirements of Rule 433 applicable to any Issuer-Permitted Free Writing Prospectus, including timely filing with the Commission where required, legending and record keeping.

Subject to the consent of the Representative required in the immediately preceding paragraph, the Company will prepare a final term sheet relating solely to the final pricing terms of the Securities (the “Final Term Sheet”) and will file the Final Term Sheet within the period required by Rule 433(d)(5)(ii) on the date such final terms have been established for such Securities. The Final Term Sheet is an Issuer-Permitted Free Writing Prospectus for purposes of this Agreement. Notwithstanding anything to the contrary contained herein, the Company consents to the use by any Underwriter of a free writing prospectus that contains only (a) (i) information describing the preliminary terms of the Securities generally or the Securities specifically or their offering, or (ii) information that describes the final terms of the Securities or their offering and that is or is to be included in the Final Term Sheet, or (b) other customary information that is not “issuer information,” as defined in Rule 433.

(l) Reporting Requirements. The Company, during the period when a prospectus is required to be delivered under the 1933 Act (including in circumstances where such requirement may be satisfied, with the prior consent of the Representative, by Rule 172 under the 1933 Act Regulations), will file all documents required to be filed with the Commission pursuant to the 1934 Act within the time periods required by the 1934 Act and the 1934 Act Regulations.

(m) Taxes. The Company will indemnify and hold harmless the Underwriters against any documentary, stamp, issue or similar tax, including any interest and penalties, on the creation, issue and sale of the Securities and on the execution and delivery of this Agreement. All payments to be made by the Company hereunder shall be made without withholding or deduction for or on account of any present or future taxes, duties or governmental charges whatsoever unless the Company is compelled by law to deduct or withhold such taxes, duties or charges. In that event, the Company shall pay such additional amounts as may be necessary in order that the net amounts received after such withholding or deduction shall equal the amounts that would have been received if no withholding or deduction had been made.

SECTION 4. Payment of Expenses.

(a) Expenses. The Company will pay all expenses incident to the performance of its obligations under this Agreement, including (i) the preparation, printing and filing of the Registration Statement (including financial statements and exhibits) as originally filed and of each amendment thereto and the cost of obtaining all securities and bank regulatory approvals, (ii) the preparation, printing and delivery to the Underwriters of copies of each preliminary prospectus, the Statutory Prospectus, any Issuer-Permitted Free Writing Prospectus and the Prospectus and any amendments or supplements thereto, (iii) the preparation, issuance and delivery of the certificates for the Securities, (iv) the fees and disbursements of the Company’s counsel, accountants and other advisors, (v) the qualification of the Securities under securities laws in accordance with the provisions of Section 3(g) hereof, (vi) the fees and expenses of the depositary, (vii) the costs and expenses of the Company and the Representative relating to investor presentations on any “road show” undertaken in connection with the marketing of the Securities, including, without limitation, expenses associated with the production of road show slides and graphics, fees and expenses of any consultants engaged by the Company or the Representative in connection with the road show presentations, travel and lodging expenses of the Representative and officers of the Company and any such consultants, and the cost of aircraft and other transportation chartered in connection with the road show, (viii) any fees payable in connection with the rating of the Securities, (ix) the fees and expenses incurred in connection with having the Securities eligible for clearance, settlement and trading through the facilities of DTC, and (x) the reasonable and documented fees and expenses of Norton Rose Fulbright US LLP, counsel to the Underwriters.

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(b) Termination of Agreement. If this Agreement is terminated by the Representative in accordance with the provisions of Section 5 or Section 9(a)(i) hereof, the Company shall reimburse the Underwriters for all of their out-of-pocket expenses.

SECTION 5. Conditions of Underwriters’ Obligations. The obligations of the several Underwriters hereunder are subject to the accuracy of the representations and warranties of the Company contained in Section 1 hereof or in certificates of any officer of the Company or any of its subsidiaries delivered pursuant to the provisions hereof, to the performance by the Company of its covenants and other obligations hereunder, and to the following further conditions:

(a) Filing of Prospectus. (i) Each of the preliminary prospectus, the Statutory Prospectus and the Prospectus containing the Rule 430B Information shall have been filed with the Commission in the manner and within the time period required by Rule 424(b) (without reliance on Rule 424(b)(8)) (or a post-effective amendment providing such information shall have been filed and become effective in accordance with the requirements of Rule 430B), and no order preventing or suspending the use of any preliminary prospectus, the Statutory Prospectus or the Prospectus shall have been issued by the Commission or any other Governmental Entity, (ii) the Final Term Sheet and any other material required to be filed by the Company pursuant to Rule 433(d) shall have been filed with the Commission within the applicable time periods prescribed in such filings by Rule 433, and (iii) the Registration Statement is effective and no stop order or other order referred to in Section 3(a)(iv) hereof shall have been issued and no proceeding for that purpose shall have been initiated or threatened; and all requests for additional information on the part of the Commission shall have been complied with to the Representative’s satisfaction.

(b) Opinions of Counsel for the Company. At the Closing Time, the Representative shall have received the opinions, dated as of the Closing Time, from each of Wachtell, Lipton, Rosen & Katz, counsel for the Company, and Adam D. Nelson, Executive Vice President and General Counsel of the Company, in form and substance satisfactory to counsel for the Underwriters, together with signed or reproduced copies of such letters for each of the other Underwriters, to the effect set forth in Exhibit A and Exhibit B hereto, respectively. Such counsel may also state that, insofar as such opinion involves factual matters, they have relied, to the extent they deem proper, upon certificates of officers of the Company and its subsidiaries and certificates of public officials.

(c) Opinion of Counsel for the Underwriters. At the Closing Time, the Representative shall have received the opinion, dated as of the Closing Time, of Norton Rose Fulbright US LLP, counsel for the Underwriters, together with signed or reproduced copies of such letter for each of the other Underwriters with respect to such matters as the Representative may reasonably require. In giving such opinion such counsel may rely, as to all matters governed by the laws of jurisdictions other than the law of the State of New York and the federal law of the United States, upon the opinions of counsel satisfactory to the Representative. Such counsel may also state that, insofar as such opinion involves factual matters, they have relied, to the extent they deem proper, upon certificates of officers of the Company and its subsidiaries and certificates of public officials.

(d) Officers’ Certificates. At the Closing Time, there shall not have been, since the date hereof or since the respective dates as of which information is given in the Registration Statement, the General Disclosure Package or the Prospectus, any Material Adverse Effect, and the Representative shall have received a certificate of the Chief Executive Officer, President or an Executive Vice President of the Company and of the Chief Financial Officer or Chief Accounting Officer of the Company, dated as of the Closing Time, to the effect that (i) there has been no such Material Adverse Effect, (ii) the representations and warranties in Section 1 hereof are true and correct with the same force and effect as though expressly made at and as of the Closing Time, and (iii) the Company has complied with all agreements and satisfied all conditions on its part to be performed or satisfied at or prior to the Closing Time.

(e) Accountant’s Comfort Letters. At the time of the execution of this Agreement, the Representative shall have received from Crowe LLP a letter dated such date, in form and substance satisfactory to the Representative, together with signed or reproduced copies of such letter for each of the other Underwriters containing statements and information of the type ordinarily included in accountants’ “comfort letters” to underwriters with respect to the financial statements and certain financial information of the Company contained in the Registration Statement, the General Disclosure Package and the Prospectus.

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(f) Chief Financial Officer’s Certificate. At the time of the execution of this Agreement and at the Closing Time, the Representative shall have received a certificate signed by the Chief Financial Officer of the Company, in form and substance satisfactory to the Representative.

(g) Bring-down Comfort Letter. At the Closing Time, the Representative shall have received from Crowe LLP a letter, dated as of the Closing Time, to the effect that it reaffirms the statements made in its letter furnished pursuant to subsection (e) of this Section, except that the specified date referred to shall be a date not more than three business days prior to the Closing Time.

(h) DTC. At the Closing Time, the Securities shall be eligible for clearance, settlement and trading in book-entry-only form through the facilities of DTC.

(i) Ratings. At the Closing Time, the Securities will be rated at least BBB- by Kroll Bond Rating Agency, Inc. Subsequent to the execution of this Agreement, there shall not have occurred a downgrading in or withdrawal of the rating assigned to the Securities or any other securities of the Company by any “nationally recognized statistical rating organization”, as such term is defined in Section 3(a)(62) of the 1934 Act, and no such organization shall have publicly announced that it has under surveillance or review, or has changed its outlook with respect to, its rating of the Securities or any other securities of the Company (other than an announcement with positive implications of a possible upgrading).

(j) No Legal Impediment to Issuance. No action shall have been taken and no statute, rule, regulation or order shall have been enacted, adopted or issued by any Governmental Entity that would, as of the Closing Time, prevent the offer, issuance or sale of the Securities; and no injunction or order of any federal, state or foreign court shall have been issued that would, as of the Closing Time, prevent the issuance or sale of the Securities.

(k) No Objection. If applicable, FINRA shall have not raised any objection with respect to the fairness and reasonableness of the underwriting terms and arrangements relating to the offering of the Securities.

(l) No Important Changes. Since the execution of this Agreement, there shall not have been any decrease in or withdrawal of the rating of any debt securities or preferred securities of the Company or any of its subsidiaries by any “nationally recognized statistical rating organization” (as defined for purposes of Section 3(a)(62) of the 1934 Act) or made any public announcement of any intended or potential decrease in or withdrawal of any such rating.

(m) Delivery of Prospectus. The Company shall have complied with the provisions hereof with respect to the furnishing of prospectuses, in electronic or printed format, on the New York business day next succeeding the date of this Agreement.

(n) Additional Documents. At the Closing Time, counsel for the Underwriters shall have been furnished with such documents, certificates and opinions as they may reasonably require for the purpose of enabling them to pass upon the issuance and sale of the Securities as herein contemplated, or in order to evidence the accuracy of any of the representations or warranties, or the fulfillment of any of the conditions, herein contained, and all proceedings taken by the Company in connection with the issuance and sale of the Securities as herein contemplated shall be satisfactory in form and substance to the Representative and counsel for the Underwriters.

(o) Termination of Agreement. If any condition specified in this Section shall not have been fulfilled when and as required to be fulfilled, this Agreement may be terminated by the Representative by notice to the Company at any time at or prior to the Closing Time and such termination shall be without liability of any party to any other party except as provided in Section 4 and except that Sections 1, 6, 7, 8, 11, 12, 13, 14, 15 and 18 shall survive any such termination and remain in full force and effect.

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SECTION 6. Indemnification.

(a) Indemnification of Underwriters. The Company agrees to indemnify and hold harmless each Underwriter, its partners, officers and directors, its affiliates, as such term is defined under Rule 405 (each, an “Affiliate”), its selling agents and each person, if any, who controls any Underwriter within the meaning of Section 15 of the 1933 Act or Section 20 of the 1934 Act as follows:

(i) against any and all loss, liability, claim, damage and expense whatsoever, as incurred, arising out of any untrue statement or alleged untrue statement of a material fact contained in the Registration Statement (or any amendment thereto), including the Rule 430B Information, if any, or the omission or alleged omission therefrom of a material fact required to be stated therein or necessary to make the statements therein not misleading or arising out of any untrue statement or alleged untrue statement of a material fact contained in any preliminary prospectus, the Statutory Prospectus, any Issuer-Represented Free Writing Prospectus, the General Disclosure Package, the Prospectus or any roadshow that does not constitute an Issuer-Represented Free Writing Prospectus (or any amendment or supplement thereto), or the omission or alleged omission therefrom of a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading;

(ii) against any and all loss, liability, claim, damage and expense whatsoever, as incurred, to the extent of the aggregate amount paid in settlement of any litigation, or any investigation or proceeding by any Governmental Entity, commenced or threatened, or of any claim whatsoever, in each case based upon any such untrue statement or omission, or any such alleged untrue statement or omission; provided that (subject to Section 6(d) below) any such settlement is effected with the written consent of the Company; and

(iii) against any and all expense whatsoever, as incurred (including the fees and disbursements of counsel chosen by the Representative), reasonably incurred in investigating, preparing or defending against any litigation, or any investigation or proceeding by any Governmental Entity, commenced or threatened, or any claim whatsoever, in each case based upon any such untrue statement or omission, or any such alleged untrue statement or omission, to the extent that any such expense is not paid under (i) or (ii) above;

provided, however, that this indemnity agreement shall not apply to any loss, liability, claim, damage or expense to the extent arising out of any untrue statement or omission or alleged untrue statement or omission made in the Registration Statement (or any amendment thereto), including the Rule 430B Information, if any, or any preliminary prospectus, the Statutory Prospectus, any Issuer-Represented Free Writing Prospectus, the General Disclosure Package or the Prospectus (or any amendment or supplement thereto) in reliance upon and in conformity with the Underwriter Information.

(b) Indemnification of Company, Directors and Officers. Each Underwriter severally and not jointly agrees to indemnify and hold harmless the Company, its directors, each of its officers who signed the Registration Statement, and each person, if any, who controls the Company within the meaning of Section 15 of the 1933 Act or Section 20 of the 1934 Act against any and all loss, liability, claim, damage and expense described in the indemnity contained in subsection (a) of this Section, as incurred, but only with respect to untrue statements or omissions, or alleged untrue statements or omissions, made in the Registration Statement (or any amendment thereto), including the Rule 430B Information, if any, or in any preliminary prospectus, the Statutory Prospectus, any Issuer-Represented Free Writing Prospectus, the General Disclosure Package or the Prospectus (or any amendment or supplement thereto) in reliance upon and in conformity with the Underwriter Information.

(c) Actions against Parties; Notification. Each indemnified party shall give notice as promptly as reasonably practicable to each indemnifying party of any action commenced against it in respect of which indemnity may be sought hereunder, but failure to so notify an indemnifying party shall not relieve such indemnifying party from any liability hereunder to the extent it is not materially prejudiced as a result thereof and in any event shall not relieve it from any liability which it may have otherwise than on account of this indemnity agreement. In the case of parties indemnified pursuant to Section 6(a) above, counsel to the indemnified parties shall be selected by the Representative, and, in the case of parties indemnified pursuant to Section 6(b) above, counsel to the indemnified parties shall be selected by the Company. An indemnifying party may participate at its own expense in the defense of any such action; provided, however, that counsel to the indemnifying party shall not (except with the consent of the indemnified party) also be counsel to the indemnified party. In no event shall the indemnifying parties be liable for fees and expenses of more than one counsel (in addition to any local counsel) separate from their own counsel for all indemnified parties in connection with any one action or separate but similar or related actions in the same jurisdiction arising out of the same general allegations or circumstances. No indemnifying party shall, without the prior written consent of the indemnified parties, settle or compromise or consent to the entry of any judgment with respect to any litigation, or any investigation or proceeding by any Governmental Entity, commenced or threatened, or any claim whatsoever in respect of which indemnification or contribution

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could be sought under this Section 6 or Section 7 hereof (whether or not the indemnified parties are actual or potential parties thereto), unless such settlement, compromise or consent (i) includes an unconditional release of each indemnified party from all liability arising out of such litigation, investigation, proceeding or claim, and (ii) does not include a statement as to or an admission of fault, culpability or a failure to act by or on behalf of any indemnified party.

SECTION 7. Contribution. If the indemnification provided for in Section 6 hereof is for any reason unavailable to or insufficient to hold harmless an indemnified party in respect of any losses, liabilities, claims, damages or expenses referred to therein, then each indemnifying party shall contribute to the aggregate amount of such losses, liabilities, claims, damages and expenses incurred by such indemnified party, as incurred, (i) in such proportion as is appropriate to reflect the relative benefits received by the Company, on the one hand, and the Underwriters, on the other hand, from the offering of the Securities pursuant to this Agreement, or (ii) if the allocation provided by clause (i) is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) above but also the relative fault of the Company, on the one hand, and the Underwriters, on the other hand, in connection with the statements or omissions which resulted in such losses, liabilities, claims, damages or expenses, as well as any other relevant equitable considerations.

The relative benefits received by the Company, on the one hand, and the Underwriters, on the other hand, in connection with the offering of the Securities pursuant to this Agreement shall be deemed to be in the same respective proportions as the total net proceeds from the offering of the Securities pursuant to this Agreement (before deducting expenses) received by the Company and the total commission received by the Underwriters bears to the aggregate initial offering price of the Securities.

The relative fault of the Company, on the one hand, and the Underwriters, on the other hand, shall be determined by reference to, among other things, whether any such untrue or alleged untrue statement of a material fact or omission or alleged omission to state a material fact relates to information supplied by the Company or by the Underwriters and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission.

The Company and the Underwriters agree that it would not be just and equitable if contribution pursuant to this Section 7 were determined by pro rata allocation (even if the Underwriters were treated as one entity for such purpose) or by any other method of allocation which does not take account of the equitable considerations referred to above in this Section 7. The aggregate amount of losses, liabilities, claims, damages and expenses incurred by an indemnified party and referred to above in this Section 7 shall be deemed to include any legal or other expenses reasonably incurred by such indemnified party in investigating, preparing or defending against any litigation, or any investigation or proceeding by any Governmental Entity, commenced or threatened, or any claim whatsoever based upon any such untrue or alleged untrue statement or omission or alleged omission.

The Underwriters’ respective obligations to contribute pursuant to this Section 7 are several in proportion to the aggregate principal amount of Securities to be purchased set forth opposite their respective names in Schedule A hereto and not joint.

Notwithstanding the provisions of this Section 7, no Underwriter shall be required to contribute any amount in excess of the amount by which the total price at which such Securities were sold by it to its investors exceeds the amount of any damages which such Underwriter has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission.

No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the 1933 Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation.

For purposes of this Section 7, each person, if any, who controls an Underwriter within the meaning of Section 15 of the 1933 Act or Section 20 of the 1934 Act and each Underwriter’s directors, officers, Affiliates and selling agents shall have the same rights to contribution as such Underwriter, and each director of the Company, each officer of the Company who signed the Registration Statement, and each person, if any, who controls the Company within the meaning of Section 15 of the 1933 Act or Section 20 of the 1934 Act shall have the same rights to contribution as the Company.

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SECTION 8. Representations, Warranties and Agreements to Survive. All representations, warranties and agreements contained in this Agreement or in certificates of officers of the Company or any of its subsidiaries submitted pursuant hereto shall remain operative and in full force and effect regardless of (a) any investigation made by or on behalf of any Underwriter, its Affiliates or selling agents or any person controlling such Underwriter or by or on behalf of the Company, its officers or directors or any person controlling the Company, and (b) delivery of and payment for the Securities.

SECTION 9. Termination of Agreement.

(a) Termination; General. The Representative may terminate this Agreement, by notice to the Company, at any time at or prior to the Closing Time, (i) if there has been, since the respective dates as of which information is given in the Registration Statement, the General Disclosure Package or the Prospectus, any material adverse change in the financial condition, earnings, or business affairs of the Company and its subsidiaries considered as one enterprise, whether or not arising in the ordinary course of business, (ii) if there has occurred any material adverse change in the financial markets in the United States or the international financial markets, any outbreak of hostilities or escalation thereof or other calamity or crisis or any change or development involving a prospective change in national or international political, financial or economic conditions, in each case the effect of which is such as to make it, in the judgment of the Representative, impracticable or inadvisable to market the Securities or to enforce contracts for the sale of the Securities, (iii) if trading in any securities of the Company has been suspended or materially limited by the Commission or the Nasdaq Global Market, or if trading generally on the Nasdaq Global Market has been suspended or materially limited, or minimum or maximum prices for trading have been fixed, or maximum ranges for prices have been required, by any of said exchanges or by such system or by order of the Commission, the Financial Industry Regulatory Authority, Inc. or any other Governmental Entity, (iv) a material disruption has occurred in commercial banking or securities or clearance, settlement or trading services in the United States, or (v) if a banking moratorium has been declared by federal, New York or Texas authorities.

(b) Liabilities. If this Agreement is terminated pursuant to this Section, such termination shall be without liability of any party to any other party except as provided in Section 4 hereof, and provided further that Sections 1, 6, 7, 8, 11, 12, 13, 14, 15 and 18 shall survive such termination and remain in full force and effect.

SECTION 10. Default by One or More of the Underwriters. If one or more of the Underwriters shall fail at the Closing Time, to purchase the Securities which it or they are obligated to purchase under this Agreement (the “Defaulted Securities”), the Representative shall have the right, within 24 hours thereafter, to make arrangements for one or more of the non-defaulting Underwriters, or any other underwriters, to purchase all, but not less than all, of the Defaulted Securities in such amounts as may be agreed upon and upon the terms herein set forth; if, however, the Representative shall not have completed such arrangements within such 24-hour period, then:

(a) if the number of Defaulted Securities does not exceed 10% of the total number of the Securities to be purchased at the Closing Time, each of the non-defaulting Underwriters shall be obligated, severally and not jointly, to purchase the full amount thereof in the proportions that their respective underwriting obligations hereunder bear to the underwriting obligations of all non-defaulting Underwriters, or

(b) if the number of Defaulted Securities exceeds 10% of the total number of the Securities to be purchased at the Closing Time, this Agreement shall terminate without liability on the part of any non-defaulting Underwriter.

No action taken pursuant to this Section shall relieve any defaulting Underwriter from liability in respect of its default.

In the event of any such default which does not result in a termination of this Agreement, either the Representative or the Company shall have the right to postpone the Closing Time, for a period not exceeding seven days in order to effect any required changes in the Registration Statement, the General Disclosure Package or Prospectus or in any other documents or arrangements. As used herein, the term “Underwriter” includes any person substituted for an Underwriter under this Section 10.

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SECTION 11. Notices. All notices and other communications hereunder shall be in writing and shall be deemed to have been duly given if mailed or transmitted by any standard form of telecommunication. Notices to the Underwriters shall be directed to the Representative care of Keefe, Bruyette & Woods, Inc. at 787 Seventh Avenue, 4th Floor, New York, New York 10019, attention of Michael C. Garea, Director, Capital Markets, e-mail: mgarea@kbw.com, and with a copy, which shall not constitute notice, to Norton Rose Fulbright US LLP, 2200 Ross Avenue, Suite 3600, Dallas, Texas 75201-7932, attention of Michael G. Keeley, Esq.; and notices to the Company shall be directed to it at its principal executive offices located at 12700 Park Central Drive, Suite 1700, Dallas, Texas 75251, attention of Adam D. Nelson, Executive Vice President and General Counsel, email: ANelson@tbkbank.com, and with a copy, which shall not constitute notice, to Wachtell, Lipton, Rosen & Katz, 51 West 52nd Street, New York, New York 10019-6150, attention of Mark F. Veblen, Esq., email: mfveblen@wlrk.com.

In accordance with the requirements of the USA Patriot Act (Title III of Pub. L. 107-56 (signed into law October 26, 2001)), the Underwriters are required to obtain, verify and record information that identifies their respective clients, including the Company, which information may include the name and address of their respective clients, as well as other information that will allow the Underwriters to properly identify their respective clients.

SECTION 12. Parties. This Agreement shall each inure to the benefit of and be binding upon the Underwriters and the Company and their respective successors. Nothing expressed or mentioned in this Agreement is intended or shall be construed to give any person, firm or corporation, other than the Underwriters and the Company and their respective successors and the Affiliates, selling agents, officers and directors and controlling persons referred to in Sections 6 and 7 and their heirs and legal representatives, any legal or equitable right, remedy or claim under or in respect of this Agreement or any provision herein contained. This Agreement and all conditions and provisions hereof are intended to be for the sole and exclusive benefit of the Underwriters and the Company and their respective successors, and said controlling persons and officers and directors and their heirs and legal representatives, and for the benefit of no other person, firm or corporation. No purchaser of Securities from any Underwriter shall be deemed to be a successor by reason merely of such purchase.

SECTION 13. No Fiduciaries. The Company acknowledges and agrees that (a) the purchase and sale of the Securities pursuant to this Agreement is an arm’s length commercial transaction between the Company, on the one hand, and the Underwriters, on the other hand, (b) in connection with the offering contemplated hereby and the process leading to such transaction, each Underwriter is and has been acting solely as a principal and is not the agent or fiduciary of the Company, any of the Company’s subsidiaries, any stockholders, creditors or employees of the Company or any of its subsidiaries or any other third party, (c) no Underwriter has assumed or will assume an advisory or fiduciary responsibility in favor of the Company or any of its subsidiaries with respect to the offering contemplated hereby or the process leading thereto (irrespective of whether such Underwriter has advised or is currently advising the Company or any of its subsidiaries on other matters), and no Underwriter has any obligation to the Company or any of its subsidiaries with respect to the offering contemplated hereby except the obligations expressly set forth in this Agreement, (d) the Underwriters and their respective affiliates may be engaged in a broad range of transactions that involve interests that differ from those of the Company and its subsidiaries, and (e) the Underwriters have not provided any legal, accounting, regulatory or tax advice with respect to the offering contemplated hereby and the Company has consulted its own legal, accounting, regulatory and tax advisors to the extent it deemed appropriate.

SECTION 14. GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, INCLUDING, WITHOUT LIMITATION, SECTION 5-1401 OF THE NEW YORK GENERAL OBLIGATIONS LAW, WITHOUT REGARD TO PRINCIPLES OF CONFLICT OF LAWS THAT WOULD RESULT IN THE APPLICATION OF LAWS OTHER THAN THE LAWS OF THE STATE OF NEW YORK.

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SECTION 15. Jurisdiction; Waiver of Jury Trial; Venue. The Company and each Underwriter hereby expressly and irrevocably (a) submits to the non-exclusive jurisdiction of the federal and state courts sitting in the Borough of Manhattan in the City of New York in any suit or proceeding arising out of or relating to this Agreement or the transactions contemplated hereby, and (b) waives (i) its right to a trial by jury in any legal action or proceeding relating to this Agreement, the transactions contemplated hereby or any course of conduct, course of dealing, statements (whether verbal or written) or actions of the Underwriters and for any counterclaim related to any of the foregoing, and (ii) any objection which it may have or hereafter may have to the laying of venue of any such litigation brought in any such court referred to above and any claim that any such litigation has been brought in an inconvenient forum.

SECTION 16. TIME. TIME SHALL BE OF THE ESSENCE OF THIS AGREEMENT. EXCEPT AS OTHERWISE SET FORTH HEREIN, SPECIFIED TIMES OF DAY REFER TO NEW YORK CITY TIME.

SECTION 17. Counterparts. This Agreement may be executed in any number of counterparts, each of which shall be deemed to be an original, but all such counterparts shall together constitute one and the same Agreement. The exchange of copies of this Agreement and of signature pages by facsimile or other electronic means shall constitute effective execution and delivery of this Agreement by the parties hereto and may be used in lieu of the original signature pages to this Agreement for all purposes.

SECTION 18. Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction hereof.

SECTION 19. General Provisions. This Agreement constitutes the entire agreement of the parties to this Agreement and supersedes all prior written or oral and all contemporaneous oral agreements, understandings and negotiations with respect to the subject matter hereof. This Agreement may not be amended or modified unless in writing by all of the parties hereto, and no condition herein (express or implied) may be waived unless waived in writing by each party whom the condition is meant to benefit.

[Signature Page Follows]

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If the foregoing is in accordance with your understanding of our agreement, please sign and return to the Company a counterpart hereof, whereupon this instrument, along with all counterparts, will become a valid and legally binding agreement between the Underwriters and the Company in accordance with its terms.

[Signature Page to Underwriting Agreement]

CONFIRMED AND ACCEPTED,

as of the date first above written:

KEEFE, BRUYETTE & WOODS, INC.

For itself and as a Representative of the other Underwriters named in Schedule A hereto

[Signature Page to Underwriting Agreement]

SCHEDULE A

Exhibit 4.2

TRIUMPH BANCORP, INC.

SECOND SUPPLEMENTAL INDENTURE

dated as of November 27, 2019

to the Indenture

dated as of September 30, 2016

4.875% Fixed-to-Floating Rate Subordinated Notes due 2029

Wells Fargo Bank, National Association, as Trustee

SECOND SUPPLEMENTAL INDENTURE

THIS SECOND SUPPLEMENTAL INDENTURE (“Second Supplemental Indenture”), dated as of November 27, 2019 is between Triumph Bancorp, Inc., a Texas corporation (the “Company”), and Wells Fargo Bank, National Association, a national banking association organized under the laws of the United States (“Wells Fargo Bank”), not in its individual capacity but solely as trustee (“Trustee”).

RECITALS

WHEREAS, the Company and the Trustee have executed and delivered an Indenture, dated as of September 30, 2016 (the “Base Indenture” and as supplemented by this Second Supplemental Indenture and further supplemented from time to time, the “Indenture”), to provide for the issuance from time to time by the Company of its unsecured subordinated indebtedness to be issued in one or more series as provided in the Indenture;

WHEREAS, the issuance and sale of Thirty-Nine Million Five Hundred Thousand Dollars ($39,500,000) aggregate principal amount of a new series of Securities of the Company designated as its 4.875% Fixed-to-Floating Rate Subordinated Notes due 2029 (the “Notes”) have been authorized by resolutions adopted by the Board of Directors of the Company, the Finance Committee of the Board of Directors of the Company, and the Chief Executive Officer and Chief Financial Officer of the Company;

WHEREAS, the Company desires to issue and sell Thirty-Nine Million Five Hundred Thousand Dollars ($39,500,000) aggregate principal amount of the Notes as of the date hereof;

WHEREAS, the Company desires to establish the terms of the Notes;

WHEREAS, the Company acknowledges that all things necessary to make this Second Supplemental Indenture a legal, binding and enforceable instrument, and to make the Notes, when executed by the Company and authenticated and delivered by the Trustee, the legal, binding and enforceable obligations of the Company, in each case, in accordance with its terms and the terms of the Base Indenture have been done;

WHEREAS, the Company has complied with all conditions precedent provided for in the Base Indenture relating to this Second Supplemental Indenture; and

WHEREAS, the Company has requested that the Trustee execute and deliver this Second Supplemental Indenture.

NOW, THEREFORE, for and in consideration of the premises stated herein and the purchase of the Notes by the Holders thereof, the Company and the Trustee covenant and agree, for the equal and proportionate benefit of the Holders of the Notes, as follows:

ARTICLE I

SCOPE OF SECOND SUPPLEMENTAL INDENTURE

Section 1.01    Scope. This Second Supplemental Indenture constitutes a supplement to the Base Indenture and an integral part of the Indenture and shall be read together with the Base Indenture as though all the provisions thereof are contained in one instrument. Except as expressly amended by this Second Supplemental Indenture, the terms and provisions of the Base Indenture shall remain in full force and effect. Notwithstanding the foregoing, this Second Supplemental Indenture shall only apply to the Notes.

ARTICLE II

DEFINITIONS

Section 2.01    Definitions and Other Provisions of General Application. For all purposes of this Second Supplemental Indenture unless otherwise specified herein:

(a)    all terms used in this Second Supplemental Indenture which are not otherwise defined herein shall have the meanings they are given in the Base Indenture;

(b)    the provisions of general application stated in Sections 102 through 115 of the Base Indenture shall apply to this Second Supplemental Indenture, except that the words “herein,” “hereof,” “hereto” and “hereunder” and other words of similar import refer to this Second Supplemental Indenture as a whole and not to the Base Indenture or any particular Article, Section or other subdivision of the Base Indenture or this Second Supplemental Indenture;

(c)    Section 101 of the Base Indenture is amended and supplemented, solely with respect to the Notes, by inserting the following additional defined terms in their appropriate alphabetical positions:

“Benchmark” means, initially, Three-Month LIBOR; provided that if a Benchmark Transition Event and its related Benchmark Replacement Date have occurred with respect to Three-Month LIBOR or the then-current Benchmark, then “Benchmark” means the applicable Benchmark Replacement.

“Benchmark Agent” means the Company or the Company’s designee appointed by the Company in its sole discretion, prior to the commencement of the Floating Rate Period (which may include the Company’s affiliates) to perform any particular obligation to be performed in connection with the transition to a Benchmark Replacement in its sole discretion.

“Benchmark Replacement” means the Interpolated Benchmark with respect to the then-current Benchmark, plus the Benchmark Replacement Adjustment for such Benchmark; provided that if the Benchmark Agent cannot determine the Interpolated Benchmark as of the Benchmark Replacement Date, then “Benchmark Replacement” means the first alternative set forth in the order below that can be determined by the Benchmark Agent as of the Benchmark Replacement Date:

- 2 -

“Benchmark Replacement Adjustment” means the first alternative set forth in the order below that can be determined by the Benchmark Agent as of the Benchmark Replacement Date:

“Benchmark Replacement Conforming Changes” means, with respect to any Benchmark Replacement, any technical, administrative or operational changes (including changes to the definition of “Floating Interest Period,” timing and frequency of determining rates with respect to each Floating Interest Period and making payments of interest, rounding of amounts or tenors, and other administrative matters) that the Benchmark Agent decides may be appropriate to reflect the adoption of such Benchmark Replacement in a manner substantially consistent with market practice (or, if the Benchmark Agent decides that adoption of any portion of such market practice is not administratively feasible or if the Benchmark Agent determines that no market practice for use of the Benchmark Replacement exists, in such other manner as the Benchmark Agent determines is reasonably necessary).

“Benchmark Replacement Date” means the earliest to occur of the following events with respect to the then-current Benchmark:

- 3 -

For the avoidance of doubt, if the event giving rise to the Benchmark Replacement Date occurs on the same day as, but earlier than, the Reference Time in respect of any determination, the Benchmark Replacement Date will be deemed to have occurred prior to the Reference Time for such determination.

“Benchmark Transition Event” means the occurrence of one or more of the following events with respect to the then-current Benchmark:

“Business Day” means any day, other than a Saturday or Sunday, that is neither a legal holiday nor a day on which banking institutions in the City of New York or any place of payment are authorized or obligated by law, regulation or executive order to close.

“Calculation Agent” means the Company or the agent appointed by the Company, in its sole discretion, prior to the commencement of the Floating Rate Period (which may include the Company or any of its Affiliates) to act in accordance with the Indenture, and which appointment may be restricted to just determining Three-Month LIBOR prior to a Benchmark Transition Event or be restricted to just determining a particular Benchmark Replacement after a Benchmark Transition Event.

“Compounded SOFR” means the compounded average of SOFRs for the applicable Corresponding Tenor, with the rate, or methodology for this rate (which will be compounded in arrears with a lookback and/or suspension period as a mechanism to determine the interest amount payable prior to the end of each applicable Floating Interest Period), and conventions for this rate being established by the Benchmark Agent in accordance with:

- 4 -

For the avoidance of doubt, the calculation of Compounded SOFR shall exclude the Benchmark Replacement Adjustment and the spread of 333 basis points per annum.

“Corresponding Tenor” with respect to a Benchmark Replacement means a tenor (including overnight) having approximately the same length (disregarding business day adjustment) as the applicable tenor for the then-current Benchmark.

“Designated LIBOR Page” means the display on Reuters, Page LIBOR01 (or any successor or substitute page of such service, or any successor to such service selected by the Company), for the purpose of displaying the London interbank rates of U.S. dollars.

“Federal Reserve” has the meaning provided in the definition of “Tier 2 Capital Event.”

“Federal Reserve Bank of New York’s Website” means the website of the Federal Reserve Bank of New York at http://www.newyorkfed.org, or any successor source.

“Fixed Rate Interest Payment Date” has the meaning provided in Section 3.02(e)(i).

“Fixed Rate Period” has the meaning provided in Section 3.02(e)(i).

“Fixed Rate Regular Record Date” has the meaning provided in Section 3.02(e)(i).

“Floating Interest Period” has the meaning provided in Section 3.02(e)(ii).

“Floating Rate Interest Payment Date” has the meaning provided in Section 3.02(e)(ii).

“Floating Rate Period” has the meaning provided in Section 3.02(e)(ii).

“Floating Rate Regular Record Date” has the meaning provided in Section 3.02(e)(ii).

“Interest Payment Date” has the meaning provided in Section 3.02(e)(ii).

“Interpolated Benchmark” with respect to the Benchmark means the rate determined for the Corresponding Tenor by interpolating on a linear basis between: (1) the Benchmark for the longest period (for which the Benchmark is available) that is shorter than the Corresponding Tenor and (2) the Benchmark for the shortest period (for which the Benchmark is available) that is longer than the Corresponding Tenor.

“ISDA Definitions” means the 2006 ISDA Definitions published by the International Swaps and Derivatives Association, Inc. or any successor thereto, as amended or supplemented from time to time, or any successor definitional booklet for interest rate derivatives published from time to time.

“ISDA Fallback Adjustment” means the spread adjustment (which may be a positive or negative value or zero) that would apply for derivatives transactions referencing the ISDA Definitions to be determined upon the occurrence of an index cessation event with respect to the Benchmark for the applicable tenor.

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“ISDA Fallback Rate” means the rate that would apply for derivatives transactions referencing the ISDA Definitions to be effective upon the occurrence of an index cessation date with respect to the Benchmark for the applicable tenor excluding the applicable ISDA Fallback Adjustment.

“Issue Date” means November 27, 2019.

“London Banking Day” means any day on which commercial banks are open for business (including dealings in U.S. dollars) in London, England.

“Maturity Date” has the meaning provided in Section 3.02(d).

“Reference Time” with respect to any determination of the Benchmark means (1) if the Benchmark is Three-Month LIBOR, 11:00 a.m. (London time) on the relevant Reset Rate Determination Date, and (2) if the Benchmark is not Three-Month LIBOR, the time determined by the Benchmark Agent in accordance with the Benchmark Replacement Conforming Changes.

“Relevant Governmental Body” means the Federal Reserve and/or the Federal Reserve Bank of New York, or a committee officially endorsed or convened by the Federal Reserve and/or the Federal Reserve Bank of New York or any successor thereto.

“Representative Amount” has the meaning provided in the definition of “Three-Month LIBOR.”

“Reset Rate Determination Date” means the second London Banking Day immediately preceding the first day of each applicable Floating Interest Period commencing on the first Floating Rate Interest Payment Date.

“SOFR” with respect to any day means the secured overnight financing rate published for such day by the Federal Reserve Bank of New York, as the administrator of the benchmark, (or a successor administrator) on the Federal Reserve Bank of New York’s Website.

“Tax Event” means the receipt by the Company of an opinion of independent tax counsel to the effect that, as a result of (a) an amendment to, or change (including any announced prospective change) in, the laws or any regulations of the United States or any political subdivision or taxing authority, or (b) any official administrative pronouncement or judicial decision interpreting or applying such laws or regulations, which change or amendment becomes effective or which pronouncement or decision is announced on or after the date of the issuance of the Notes, there is more than an insubstantial risk that the interest payable on the Notes is not, or within 90 days of receipt of such opinion of tax counsel, will not be, deductible by the Company, in whole or in part, for U.S. federal income tax purposes.

“TBK Bank” shall mean TBK Bank, SSB, a Texas state savings bank.

“Term SOFR” means the forward-looking term rate for the applicable Corresponding Tenor based on SOFR that has been selected or recommended by the Relevant Governmental Body.

“Three-Month LIBOR” means, for any Floating Interest Period, the offered rate for deposits in U.S. dollars having a maturity of three months that appears on the Designated LIBOR Page as of 11:00 a.m., London time, on the Reset Rate Determination Date related to such Floating Interest Period. If such rate does not appear on such page at such time, and if a Benchmark Transition Event has not occurred, then the Calculation Agent will request the principal London office of each of four major reference banks in the London interbank market, selected by the Company for this

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purpose and whose names and contact information will be provided by the Company to the Calculation Agent, to provide such bank’s offered quotation to prime banks in the London interbank market for deposits in U.S. dollars with a term of three months as of 11:00 a.m., London time, on such Reset Rate Determination Date and in a principal amount equal to an amount for a single transaction in U.S. dollars in the relevant market at the relevant time as determined by the Company and provided to the Calculation Agent (a “Representative Amount”). If at least two such quotations are so provided, Three-Month LIBOR for the Floating Interest Period related to such Reset Rate Determination Date will be the arithmetic mean of such quotations. If fewer than two such quotations are provided, the Calculation Agent will request each of three major banks in the City of New York selected by the Company for this purpose and whose names and contact information will be provided by the Company to the Calculation Agent, to provide such bank’s rate for loans in U.S. dollars to leading European banks with a term of three months as of approximately 11:00 a.m., New York City time, on such Reset Rate Determination Date and in a Representative Amount. If at least two such rates are so provided, Three-Month LIBOR for the Floating Interest Period related to such Reset Rate Determination Date will be the arithmetic mean of such quotations. If fewer than two such rates are so provided, but a Benchmark Event has not occurred, then Three-Month LIBOR for the Floating Interest Period related to such Reset Rate Determination Date will be set to equal the Three-Month LIBOR for the immediately preceding Floating Interest Period or, in the case of the Floating Interest Period commencing on the first Floating Rate Interest Payment Date, the coupon shall be the most recent Three-Month LIBOR that can be determined by reference to the Designated LIBOR Page. All percentages used in or resulting from any calculation of Three-Month LIBOR will be rounded, if necessary, to the nearest one hundred-thousandth of a percentage point, with 0.000005% rounded up to 0.00001%.

“Tier 2 Capital Event” shall mean the receipt by the Company of an opinion of independent bank regulatory counsel to the effect that, as a result of (a) any amendment to, or change (including any announced prospective change) in, the laws or any regulations thereunder of the United States or any rules, guidelines or policies of an applicable regulatory authority for the Company or (b) any official administrative pronouncement or judicial decision interpreting or applying such laws or regulations, which amendment or change is effective or which pronouncement or decision is announced on or after the date of original issuance of the Notes, the Notes do not constitute, or within 90 days of the date of such opinion will not constitute, Tier 2 capital (or its equivalent if the Company were subject to such capital requirement) for purposes of capital adequacy guidelines of the Board of Governors of the Federal Reserve System (the “Federal Reserve”) (or any successor regulatory authority with jurisdiction over bank holding companies), as then in effect and applicable to the Company that would preclude the Notes from being included as Tier 2 capital.

“Unadjusted Benchmark Replacement” means the Benchmark Replacement excluding the Benchmark Replacement Adjustment.

(d)    Section 101 of the Base Indenture is amended and supplemented, solely with respect to the Notes, by replacing the corresponding defined term in the Base Indenture with the following defined terms:

“Senior Debt” means the principal, premium, if any, unpaid interest (including interest accruing on or after the filing of any petition in bankruptcy or for reorganization relating to the Company whether or not a claim for post-filing interest is allowed in such proceeding), fees, charges, expenses, reimbursement and indemnification obligations, and all other amounts payable under or in respect of the following indebtedness of the Company for money borrowed, whether any such indebtedness exists as of the date of the Indenture or is created, incurred, assumed or guaranteed after such date: (i) any debt (a) for money borrowed by the Company, or (b) evidenced by a bond, note, debenture, or similar instrument (including purchase money obligations) given in connection

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with the acquisition of any business, property or assets, whether by purchase, merger, consolidation or otherwise, but shall not include any account payable or other obligation created or assumed in the ordinary course of business in connection with the obtaining of materials or services, or (c) which is a direct or indirect obligation which arises as a result of banker’s acceptances or bank letters of credit issued to secure obligations of the Company, or to secure the payment of revenue bonds issued for the benefit of the Company whether contingent or otherwise; (ii) the obligation of the Company as lessee under any lease of property which is reflected on the Company’s balance sheet as a capitalized lease; (iii) obligations to general and trade creditors; (iv) an obligation arising from direct credit substitutes; (v) any obligation associated with derivative products such as interest and foreign exchange rate contracts, commodity contracts and similar arrangements; (vi) all obligations of the type referred to in the foregoing of other Persons for the payment of which the Company is responsible or liable as obligor, guarantor or otherwise, whether or not classified as a liability on a balance sheet prepared in accordance with accounting principles generally accepted in the United States; and (vii) any deferral, amendment, renewal, extension, supplement or refunding of any liability of the kind described in any of the foregoing. Senior Debt excludes: (w) any such indebtedness, obligation or liability referred to above as to which, in the instrument creating or evidencing the same or pursuant to which the same is outstanding, it is provided that such indebtedness, obligation or liability is not superior in right of payment to the Notes, or ranks pari passu with the Notes; (x) any such indebtedness, obligation or liability which is subordinated to indebtedness of the Company to substantially the same extent as or to a greater extent than the Notes are subordinated; (y) any indebtedness to a subsidiary of the Company; and (z) the Notes. Notwithstanding the foregoing, and for the avoidance of doubt, if the Federal Reserve (or other competent regulatory agency or authority) promulgates any rule or issues any interpretation that defines general creditor(s), the main purpose of which is to establish criteria for determining whether the subordinated debt of a financial or bank holding company is to be included in its capital, then the term “general creditors” as used in this definition will have the meaning as described in that rule or interpretation.

ARTICLE III

FORM AND TERMS OF THE NOTES

Section 3.01    Form and Dating.

(a)    The Notes shall be substantially in the form of Exhibit A attached hereto. The Notes shall be executed on behalf of the Company by its Chairman of the Board, its Chief Executive Officer, Chief Financial Officer, its President, one of its Executive Vice Presidents, one of its Senior Vice Presidents, one of its Vice Presidents or its Treasurer, attested by its Secretary or one of its Assistant Secretaries. The Notes may have a legend or legends or endorsements as may be required to comply with any law or with any rules of any securities exchange or usage. The Notes shall be dated the date of their authentication.

(b)    The terms contained in the Notes shall constitute, and are hereby expressly made, a part of the Indenture as supplemented by this Second Supplemental Indenture, and the Company and the Trustee, by their execution and delivery of this Second Supplemental Indenture, expressly agree to such terms and provisions and to be bound thereby.

Section 3.02    Terms of the Notes. The following terms relating to the Notes are hereby established:

(a)    Title. The Notes shall constitute a series of Securities having the title “Triumph Bancorp, Inc. 4.875% Fixed-to-Floating Rate Subordinated Notes due 2029” and the CUSIP number 89679EAB8.

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(b)    Principal Amount. The aggregate principal amount of the Notes that may be authenticated and delivered under the Indenture, as amended hereby, shall be Thirty-Nine Million Five Hundred Thousand Dollars ($39,500,000) on the Issue Date. Provided that no Event of Default has occurred and is continuing with respect to the Notes, the Company may, from time to time, without notice to or the consent of the Holders of the Notes, create and issue further notes ranking equally with the Notes and with identical terms in all respects (or in all respects except for the offering price, the payment of interest accruing prior to the issue date of such further notes or except for the first payment of interest following the issue date of such further notes) in order that such further notes may be consolidated and form a single series with the Notes and have the same terms as to status, redemption or otherwise as the Notes; provided however, that a separate CUSIP number will be issued for any such additional notes unless such additional notes are fungible with the Notes for U.S. federal income tax purposes, subject to the procedures of the DTC.

(c)    Person to Whom Interest is Payable. Interest payable on each Note, and punctually paid or duly provided for, on any Interest Payment Date (as defined herein) will be paid to the Person in whose name such Note is registered at the close of business on the 15th day of the month immediately preceding the applicable Interest Payment Date, whether or not such day is a Business Day. Any such interest which is payable, but is not so punctually paid or duly provided for on any Interest Payment Date shall cease to be payable to the Holder on such relevant record date by virtue of having been a Holder on such date, and such defaulted interest may be paid by the Company to the Person in whose name such Note is registered at the close of business on a special record date for the payment of defaulted interest to be fixed by the Company, notice whereof shall be given to Holders of Notes of this series not less than 10 days prior to such special record date that complies with Section 307 of the Base Indenture, or be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange on which the Notes may be listed and upon such notice as may be required by such exchange and in compliance with the Base Indenture. However, interest that is paid on the Maturity Date will be paid to the person to whom the principal will be payable.

(d)    Maturity Date. The entire outstanding principal amount of the Notes shall be payable on November 27, 2029 (the “Maturity Date”).

(e)    Interest.

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(f)    Place of Payment of Principal and Interest. So long as the Notes shall be issued in global form, the Company shall make, or cause the Paying Agent to make, all payments of principal and interest on the Notes by wire transfer in immediately available funds in Dollars to DTC or its nominee, in accordance with applicable procedures of DTC. If the Notes are not in global form, the Company, may, at its option, make, or cause the Paying Agent to make, payments of principal and interest on the Notes by check mailed to the address of the Person specified for payment in accordance with Section 3.02(e)(i) and (e)(ii) above, as applicable. A Global Note with respect to the Notes shall be exchangeable for physical securities of such series only if:

(g)    Redemption. The Notes shall be redeemable, in each case, in whole or in part from time to time, at the option of the Company prior to the Maturity Date beginning with the Interest Payment Date on November 27, 2024, but not prior thereto, and on any Interest Payment Date thereafter subject to obtaining the prior approval of the Federal Reserve to the extent such approval is required under the rules of the Federal Reserve. The Notes may not otherwise be redeemed prior to the Maturity Date, except that the Company may, at its option, redeem the Notes before the Maturity Date in whole but not in part from time to time, upon the occurrence of a Tier 2 Capital Event or a Tax Event, or if the Company is required to

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register as an investment company pursuant to the Investment Company Act of 1940, as amended (15 U.S.C. 80a-1 et seq.). Any such redemption will be at a Redemption Price equal to 100% of the principal amount of the Notes to be redeemed plus accrued and unpaid interest to, but excluding, the redemption date fixed by the Company. In the case of Notes represented by a Global Note, any partial redemption will be made in accordance with DTC’s applicable procedures among all of the Holders of the Notes and will be reflected in the records of the Trustee or its nominee as a decrease in the principal amount of such Global Note. If any Note is to be redeemed in part only, the notice of redemption relating to such Note shall state that it is a partial redemption and the portion of the principal amount thereof to be redeemed. A replacement Note in principal amount equal to the unredeemed portion thereof will be issued in the name of the Holder thereof upon cancellation of the original Note. The Notes are not subject to redemption or prepayment at the option of the Holders. The provisions of Article Eleven of the Base Indenture (as amended herein) shall apply to any redemption of the Notes pursuant to this Section 3.02, except that Section 1104 of the Base Indenture is amended and supplemented, solely with respect to the Notes, by inserting the following sentence immediately before the last sentence of Section 1104:

“Notwithstanding the foregoing, any redemption may, at the option of the Company, be subject to the satisfaction of one or more conditions precedent. In addition, if such redemption or notice of redemption is subject to satisfaction of one or more conditions precedent, such notice of redemption shall state that, in the Company’s discretion, the Redemption Date may be delayed until such time (including more than 60 days after the date the notice of redemption was delivered (or delivered electronically if the Notes are held by any depository)) as any or all such conditions shall be satisfied or waived, or such redemption may not occur and such notice of redemption may be rescinded in the event that any or all such conditions shall not have been satisfied or waived by the Redemption Date, or by the Redemption Date as so delayed, or such notice of redemption may be rescinded at any time in the Company’s discretion if in the good faith judgment of the Company any or all of such conditions will not be satisfied or waived.”

(h)    Sinking Fund. There shall be no sinking fund for the Notes.

(i)    Denomination. The Notes and any beneficial interest in the Notes shall be in minimum denominations of $1,000 and integral multiples of $1,000 in excess thereof.

(j)    Currency of the Notes. The Notes shall be denominated, and payment of principal and interest of the Notes shall be payable in, the currency of the United States of America.

(k)    Acceleration. There is no right of acceleration in the case of a default in the payment of principal of or interest or Additional Amounts on the Notes or in the Company’s nonperformance of any other obligation under the Notes or the Indenture. Acceleration shall only occur in the circumstances further described under the Indenture, as amended hereby in Section 3.02(o).

(l)    Stated Maturity. The principal of the Notes shall be payable on November 27, 2029 subject to acceleration as provided under the Indenture.

(m)    Registered Form. The Notes shall be issuable as registered global Securities, and DTC (or any successor thereto or successor depository appointed by the Company within 90 days of the termination of services of DTC) shall be the depository for the Notes.

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(n)    Additional Event of Default. In addition to the Events of Default provided for in Section 501 of the Base Indenture, an Event of Default shall occur with respect to the Notes in the event that a court of competent jurisdiction enters an order or decree under any Bankruptcy Law that appoints a Custodian for the Company’s principal banking subsidiary (which, for the avoidance of doubt, as of the date of this Second Supplemental Indenture, is TBK Bank). Such Event of Default shall be treated for all purposes under the Indenture as if it were an Event of Default under Section 501(6) of the Base Indenture.

(o)    Acceleration of Maturity, Rescission and Annulment. Section 502 of the Base Indenture shall apply to the Notes, except that the first paragraph thereof shall be substituted with the following:

“If an Event of Default under clause (5) or (6) of Section 501 occurs and is continuing, then the principal amount of all the Notes, together with any premium, Make-Whole Amount, accrued and unpaid interest and Additional Amounts, if any, thereon, shall automatically, and without any declaration or other action on the part of the Trustee or any Holder, become immediately due and payable. The Maturity of the Notes shall not otherwise be accelerated as a result of an Event of Default.”

(p)    Ranking. The Notes shall rank junior to and shall be subordinated to all Senior Debt of the Company, whether existing as of the date of this Second Supplemental Indenture, or hereafter issued or incurred, including all indebtedness relating to money owed to general creditors and trade creditors. By their terms, the Company’s Floating Rate Junior Subordinated Notes due 2035, Floating Rate Junior Subordinated Note due 2037, Junior Subordinated Debt Securities due July 7, 2036, Unsecured Junior Subordinated Deferrable Interest Notes due September 15, 2033, Floating Rate Junior Subordinated Deferrable Interest Debentures due September 2032 and Floating Rate Junior Subordinated Deferrable Interest Debentures due July 2034 rank junior and are subordinated to the notes. Subject to the terms of the Base Indenture, if the Trustee or any Holder of any of the Notes receives any payment or distribution of the Company’s assets in contravention of the subordination provisions applicable to the Notes before all Senior Debt is paid in full in cash, property or securities, including by way of set-off or any such payment or distribution that may be payable or deliverable by reason of the payment of any other indebtedness of the Company being subordinated to the payment of the Notes, then such payment or distribution will be held in trust for the benefit of holders of Senior Debt or their representatives to the extent necessary to make payment in full in cash or payment satisfactory to the holders of Senior Debt of all unpaid Senior Debt.

(q)    No Collateral. The Notes shall not be entitled to the benefit of any security interest in, or collateralization by, any rights, property or interest of the Company.

(r)    Satisfaction and Discharge. Article Four of the Base Indenture shall apply to the Notes.

(s)    Defeasance and Covenant Defeasance. Article Fourteen of the Base Indenture shall apply to the Notes.

(t)    Additional Terms. Other terms applicable to the Notes are as otherwise provided for in the Base Indenture, as supplemented by this Second Supplemental Indenture.

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ARTICLE IV

ADDITIONAL PROVISIONS

Section 4.01    Additional Provisions.

(a)    Section 106 of the Base Indenture shall apply to the Notes, provided that, with respect to the Notes, the following text shall be deemed to be inserted at the end of such Section: “Any notices required to be given to Holders will also be given to the Trustee. For the avoidance of doubt, where this Indenture or any Note provides for notice of any event or any other communication (including any Notice of Redemption or repurchase) to a Holder of a Note (whether by mail or otherwise) such notice shall be sufficiently given if given to DTC (or its designee) pursuant DTC’s (or its designee’s) applicable procedures, including by electronic mail in accordance with accepted practices at DTC.”

(b)    Section 901 of the Base Indenture shall apply to the Notes, provided that, with respect to the Notes, the following text shall be deemed to be inserted at the end of such Section:

“Not in limitation of the foregoing, without the consent of any Holder of Notes, the Company and the Trustee may amend or supplement the Indenture or the Notes to conform the terms of the Indenture and the Notes to the description of the Notes in the prospectus supplement dated November 21, 2019 relating to the offering of the Notes.”

ARTICLE V

MISCELLANEOUS

Section 5.01    Trust Indenture Act. This Second Supplemental Indenture is subject to the provisions of the Trust Indenture Act that are required to be part of the Indenture and shall, to the extent applicable, be governed by such provisions. If any provision of this Second Supplemental Indenture limits, qualifies, or conflicts with a provision of the Trust Indenture Act that is required under such act to be a part of and govern this Second Supplemental Indenture, the latter provision shall control.

Section 5.02    Communications by Holders with Other Holders. Holders of Notes may communicate pursuant to TIA Section 312(b) with other Holders of Notes with respect to their rights under this Indenture or the Notes. The Company, the Trustee, the Registrar and anyone else shall have the protection of TIA Section 312(c).

Section 5.03    GOVERNING LAW. THIS SECOND SUPPLEMENTAL INDENTURE AND THE NOTES WILL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

Section 5.04    Duplicate Originals. The parties may execute any number of counterparts of this Second Supplemental Indenture. Each executed copy shall be an original, but all of them together represent the same agreement. Notwithstanding the foregoing, the exchange of copies of this Indenture and of signature pages by facsimile or PDF (e-mail) transmission shall constitute effective execution and delivery of this Indenture as to the parties hereto and may be used in lieu of the original Indenture and signature pages for all purposes.

Section 5.05    Severability. In case any provision in this Second Supplemental Indenture or the Notes shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby.

Section 5.06    Ratification. The Base Indenture, as supplemented and amended by this Second Supplemental Indenture, is in all respects ratified and confirmed. The Base Indenture and this Second Supplemental Indenture shall be read, taken and construed as one and the same instrument. All provisions included in this Second Supplemental Indenture supersede any conflicting provisions included in the Base

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Indenture unless not permitted by law. The Trustee accepts the trusts created by the Base Indenture, as supplemented by this Second Supplemental Indenture, and agrees to perform the same upon the terms and conditions of the Base Indenture, as supplemented by this Second Supplemental Indenture.

Section 5.07    Effectiveness. The provisions of this Second Supplemental Indenture shall become effective as of the date hereof.

Section 5.08    Successors. All agreements of the Company in this Second Supplemental Indenture shall bind its successors. All agreements of the Trustee in this Second Supplemental Indenture shall bind its successors.

Section 5.09    Indenture and Notes Solely Corporate Obligations. No recourse will be available for the payment of principal of, or interest or any additional amounts on, any Note, for any claim based thereon, or otherwise in respect thereof, against any of the Trustee, any shareholder, employee, officer or director, as such, past, present or future, of the Company or of any successor entity; it being expressly understood that all such liability is hereby expressly waived and released as a condition of, and as a consideration for, the execution of this Second Supplemental Indenture and the issue of the Notes.

Section 5.10    Trustee’s Disclaimer. The recitals contained herein shall be taken as the statements of the Company and the Trustee assumes no responsibility for their correctness. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Second Supplemental Indenture, the Notes, or for or in respect of the recitals contained herein, all of which recitals are made solely by the Company.

Section 5.11. U.S.A. PATRIOT Act. The parties hereto acknowledge that in accordance with Section 326 of the U.S.A. PATRIOT Act the Trustee, like all financial institutions and in order to help fight the funding of terrorism and money laundering, are required to obtain, verify, and record information that identifies each person or legal entity that establishes a relationship or opens an account with the Trustee. The parties to this Second Supplemental Indenture agree that they will provide the Trustee with such information as it may request in order for the Trustee to satisfy the requirements of the U.S.A. PATRIOT Act.

[Remainder of page intentionally left blank.]

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IN WITNESS WHEREOF, the parties hereto have caused this Second Supplemental Indenture to be duly executed as of the date first above written.

[Signature Page to Second Supplemental Indenture]

[Signature Page to Second Supplemental Indenture]

EXHIBIT A

FORM OF NOTE

See attached.

19

THIS SECURITY AND THE OBLIGATIONS OF THE COMPANY (AS DEFINED HEREIN) AS EVIDENCED HEREBY (1) ARE NOT DEPOSITS WITH OR HELD BY THE COMPANY AND ARE NOT INSURED OR GUARANTEED BY ANY FEDERAL AGENCY OR INSTRUMENTALITY, INCLUDING, WITHOUT LIMITATION, THE FEDERAL DEPOSIT INSURANCE CORPORATION, AND (2) ARE SUBORDINATE IN THE RIGHT OF PAYMENT TO THE SENIOR DEBT (AS DEFINED IN THE INDENTURE IDENTIFIED HEREIN).

GLOBAL NOTE

THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF THE DEPOSITARY OR A NOMINEE OF THE DEPOSITARY, WHICH MAY BE TREATED BY THE COMPANY, THE TRUSTEE AND ANY AGENT THEREOF AS OWNER AND HOLDER OF THIS SECURITY FOR ALL PURPOSES.

UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR THE DEFINITIVE SECURITIES REPRESENTED HEREBY, THIS GLOBAL SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE (I) BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR (II) BY A NOMINEE OF THE DEPOSITARY OR THE DEPOSITARY TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY. UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND ANY PAYMENT IS MADE TO CEDE & CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY, OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY, OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY.

A-1

TRIUMPH BANCORP, INC.

4.875% Fixed-to-Floating Rate Subordinated Notes due 2029

Triumph Bancorp, Inc., a Texas corporation (hereinafter called the “Company,” which term includes any successor corporation under the Indenture hereinafter referred to), for value received, hereby promises to pay to CEDE & CO., or its registered assigns, the principal sum of Thirty-Nine Million Five Hundred Thousand Dollars ($39,500,000) (or such other amount as set forth in the Schedule of Increases or Decreases in Global Note attached hereto) on November 27, 2029 (such date is hereinafter referred to as the “Maturity Date”), unless redeemed prior to such date. This Note will bear interest at a fixed rate of 4.875% per annum from, and including, November 27, 2019, to, but excluding, November 27, 2024 (the “Fixed Rate Period”), or earlier Redemption Date. Interest accrued on this Note during the Fixed Rate Period will be payable semi-annually in arrears on May 27 and November 27 of each year (each such date, a “Fixed Rate Interest Payment Date”), with the first such Fixed Rate Interest Payment Date being May 27, 2020 and the last such Fixed Rate Interest Payment Date being November 27, 2024 or earlier Redemption Date. This Note will bear interest at a floating per annum interest rate from, and including, November 27, 2024 to, but excluding, the Maturity Date or any earlier Redemption Date that occurs subsequent to November 27, 2024 (the “Floating Rate Period”). The floating interest rate will be reset quarterly, and the interest rate for any Floating Interest Period will be equal to the then-current Benchmark plus 333 basis points. During the Floating Rate Period, interest on this Note will be payable quarterly in arrears on February 27, May 27, August 27 and November 27 of each year (each such date, a “Floating Rate Interest Payment Date”, and together with a Fixed Rate Interest Payment Date, an “Interest Payment Date”), with the first such Floating Rate Interest Payment Date being February 27, 2025 and the last such Floating Rate Interest Payment Date being the Maturity Date or any earlier Redemption Date that occurs subsequent to November 27, 2024.

The interest payable on any Fixed Rate Interest Payment Date during the Fixed Rate Period will be computed on the basis of a 360-day year consisting of twelve 30-day months to, but excluding, November 27, 2024. The interest payable on any Floating Rate Interest Payment Date during the Floating Rate Period will be computed on the basis of a 360-day year and the number of days actually elapsed. If a Fixed Rate Interest Payment Date or the Maturity Date for this Note falls on a day that is not a Business Day, the interest payable on such Interest Payment Date or the payment of principal and interest on the Maturity Date will be paid on the next succeeding Business Day, but the payments made on such dates will be treated as being made on the date that the payment was first due and the Holders of this Note will not be entitled to any further interest or other payment. If a Floating Rate Interest Payment Date falls on a day that is not a Business Day, then such Floating Rate Interest Payment Date will be postponed to the next succeeding Business Day, unless such day falls in the next succeeding calendar month, in which case such Floating Rate Interest Payment Date will be accelerated to the immediately preceding Business Day, and, in each such case, the amounts payable on such Business Day will include interest accrued to, but excluding, such Business Day. All percentages used in or resulting from any calculation of the Benchmark shall be rounded, if necessary, to the nearest one hundred-thousandth of a percentage point, with 0.000005% rounded up to 0.00001%. Notwithstanding the foregoing, if the Benchmark is zero, then the Benchmark shall be deemed to be zero.

Payment of the principal of and interest on this Note will be made at the office or agency of the Company maintained for that purpose, which shall initially be the Corporate Trust Office of the Trustee, in such currency of the United States of America as at the time of payment is legal tender for payment of public and private debts.

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Reference is hereby made to the further provisions of this Note set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place.

Unless the certificate of authentication hereon has been executed by the Trustee referred to on the reverse hereof by manual signature, this Note shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

[Remainder of this page intentionally left blank. Signature page follows.]

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IN WITNESS WHEREOF, the Company has caused this Note to be signed manually or by facsimile by its duly authorized officer.

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TRUSTEE’S CERTIFICATE OF AUTHENTICATION

This is one of the Securities of the series designated therein and referred to in the within-mentioned Indenture.

Date of authentication:

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REVERSE OF NOTE

TRIUMPH BANCORP, INC.

4.875% Fixed-to-Floating Rate Subordinated Notes due 2029

This Note is one of a duly authorized issue of Securities of the Company of a series designated as the “Triumph Bancorp, Inc. 4.875% Fixed-to-Floating Rate Subordinated Notes due 2029” (herein called the “Notes”) initially issued in an aggregate principal amount of Thirty-Nine Million Five Hundred Thousand Dollars ($39,500,000) on November 27, 2019. Such series of Securities has been established pursuant to, and is one of an indefinite number of series of subordinated debt securities of the Company issued or issuable under and pursuant to the Indenture, dated as of September 30, 2016 (the “Base Indenture”), between the Company and Wells Fargo Bank, National Association, as Trustee (herein called the “Trustee,” which term includes any successor trustee), as supplemented and amended by the Second Supplemental Indenture between the Company and the Trustee, dated as of November 27, 2019 (the “Second Supplemental Indenture,” and the Base Indenture as supplemented and amended by the Second Supplemental Indenture, the “Indenture”), to which Indenture and any other indentures supplemental thereto reference is hereby made for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Persons in whose names Notes are registered from time to time and of the terms upon which the Notes are, and are to be, authenticated and delivered. The terms, conditions and provisions of the Notes are those stated in the Indenture, those made part of the Indenture by reference to the Trust Indenture Act of 1939, as amended (the “Trust Indenture Act”), and those set forth in this Note. To the extent that the terms, conditions and provisions of this Note modify, supplement or are inconsistent with those of the Indenture, then the terms, conditions and other provisions of this Note shall govern to the extent that such terms, conditions and other provisions of this Note are not inconsistent with the terms, conditions and provisions made part of the Indenture by reference to the Trust Indenture Act.

All capitalized terms used in this Note and not defined herein that are defined in the Indenture shall have the meanings assigned to them in the Indenture. To the extent that any capitalized term used in this Note and defined herein is also defined in the Indenture but conflicts with the definition provided in the Indenture, the definition of the capitalized term in this Note shall control.

The indebtedness of the Company evidenced by the Notes, including the principal thereof, premium, if any, Additional Amounts, if any, and interest thereon, is, to the extent and in the manner set forth in the Indenture, subordinate and subject in right of payment to the prior payment in full of all Senior Debt, whether outstanding at the date hereof or hereafter incurred, and on the terms and subject to the terms and conditions set forth in the Indenture, and shall rank pari passu in right of payment with all other Securities and with all other unsecured subordinated indebtedness of the Company and not by its terms subordinate and subject in right of payment to the prior payment in full of debentures, notes, bonds or other evidences of indebtedness of types that include the Notes. Each Holder of this Note, by the acceptance hereof, agrees to and shall be bound by such provisions of the Indenture and authorizes and directs the Trustee on his behalf to take such actions as may be necessary or appropriate to effectuate the subordination so provided.

The Notes are intended to qualify as Tier 2 capital (or its then equivalent if the Company were subject to such capital requirement) for purposes of capital adequacy guidelines of the Board of Governors of the Federal Reserve System (or any successor regulatory authority with jurisdiction over bank holding companies) (the “Federal Reserve”), as then in effect and applicable to the Company.

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If an Event of Default with respect to Notes shall occur and be continuing, the principal and interest owed on the Notes shall only become due and payable in accordance with the terms and conditions set forth in Article Five of the Base Indenture and Section 3.02(k) and (o) of the Second Supplemental Indenture. Accordingly, there is no right of acceleration in the case of a default in the payment of principal of or interest or Additional Amounts on this Note or in the Company’s nonperformance of any other obligation under this Note or the Indenture.

Any determination, decision or election that may be made by the Company, or by the Benchmark Agent under the terms of the Indenture or the Notes, including any determination with respect to a tenor, rate or adjustment or of the occurrence or non-occurrence of an event, circumstance or date and any decision to take or refrain from taking any action or selection (A) will be conclusive and binding on the Holders of this Note, the Calculation Agent and the Trustee, absent manifest error, (B) if made by the Company, will be made in the Company’s sole discretion, (C) if made by a Benchmark Agent appointed by the Company, will be made after consultation with the Company, and the Benchmark Agent will not make any such determination, decision or election to which the Company reasonably objects, (D) notwithstanding anything to the contrary in the Indenture or the Notes, shall become effective without consent from the Holders of the Notes or the Trustee and (E) shall be provided to the Trustee and the Calculation Agent in writing. If the Benchmark Agent fails to make any determination, decision or election that it is required to make under the terms of the Indenture and the Notes, then the Company will make such determination, decision or election on the same basis as described in the Indenture.

This Note shall be redeemable, in each case, in whole or in part from time to time, at the option of the Company prior to the Maturity Date beginning with the Interest Payment Date on November 27, 2024, but not prior thereto, and on any Interest Payment Date thereafter subject to obtaining the prior approval of the Federal Reserve to the extent such approval is required under the rules of the Federal Reserve. This Note may not otherwise be redeemed prior to the Maturity Date, except that the Company may, at its option, redeem the Notes before the Maturity Date in whole but not in part from time to time, upon the occurrence of a Tier 2 Capital Event or a Tax Event, or if the Company is required to register as an investment company pursuant to the Investment Company Act of 1940, as amended (15 U.S.C. 80a-1 et seq.). Any such redemption will be at a Redemption Price equal to 100% of the principal amount of the Notes to be redeemed plus accrued and unpaid interest to, but excluding, the redemption date fixed by the Company. Any partial redemption of this Note will be made in accordance with DTC’s applicable procedures among all of the Holders of this Note and will be reflected in the records of the Trustee or its nominee as a decrease in the principal amount of this Note. If this Note is to be redeemed in part only, the notice of redemption relating to this Note shall state that it is a partial redemption and the portion of the principal amount thereof to be redeemed. A replacement Note in principal amount equal to the unredeemed portion thereof will be issued in the name of the Holder thereof upon cancellation of the original Note. This Note is not subject to redemption or prepayment at the option of the Holders.

There shall be no sinking fund for the Notes.

The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders of the Notes at any time by the Company and the Trustee with the consent of the Holders of at least a majority in principal amount of the Outstanding Notes. The Indenture also contains provisions permitting the Holders of specified percentages in principal amount of the Notes at the time Outstanding, on behalf of the Holders of all Notes, to waive certain past defaults under the Indenture and their consequences. Any such consent or waiver by the Holder of this Note shall be conclusive and binding upon such Holder and upon all future Holders of this Note and of any Note issued upon the registration of transfer hereof or in exchange therefor or in lieu hereof, whether or not notation of such consent or waiver is made upon this Note.

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As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Note is registrable in the Register described in Section 305 of the Base Indenture, upon surrender of this Note for registration of transfer at the office or agency of the Company in any place where the principal of and interest on this Note are payable, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Company and the Registrar duly executed by the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Notes, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

The Notes are issuable only in registered form without coupons in minimum denominations of $1,000 and integral multiples of $1,000 in excess thereof.

The Company and the Trustee and any agent of the Company or the Trustee may treat the Person in whose name this Note is registered as the sole owner or Holder of this Note for all purposes, whether or not this Note is overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the contrary.

This Security is a global note, represented by one or more permanent global certificates registered in the name of the nominee of The Depository Trust Company (each a “Global Note” and collectively, the “Global Notes”). Accordingly, unless and until it is exchanged for definitive securities, this Note may not be transferred except as a whole by The Depository Trust Company (the “Depositary”) to a nominee of such Depositary or by a nominee of such Depositary or by the Depositary or any nominee to a successor Depositary or any nominee of such successor. Ownership of beneficial interests in this Security will be shown on, and the transfer of that ownership will be effected only through, records maintained by the applicable Depositary or its nominee (with respect to interest of persons that have accounts with the Depositary (“Participants”)) and the records of Participants (with respect to interests of persons other than Participants). Beneficial interests in Notes owned by persons that hold through Participants will be evidenced only by, and transfers of such beneficial interests with such Participants will be effected only through, records maintained by such Participants. Except as provided below, owners of beneficial interests in this Note will not be entitled to have any definitive securities and will not be considered the owners or Holders thereof under the Indenture.

Except in the limited circumstances set forth in the Indenture, Participants and owners of beneficial interests in the Global Notes will not be entitled to receive Notes in the form of definitive securities and will not be considered Holders of Notes. None of the Company, the Trustee, the Registrar, the Paying Agent or any of their respective agents will be liable for any delay by the Depositary, its nominee or any direct or indirect Participant in identifying the beneficial owners of the related Notes. The Company, the Trustee, the Registrar, the Paying Agent and each of their respective agents may conclusively rely on, and will be protected in relying on, instructions from the Depositary or its nominee for all purposes, including with respect to the registration and delivery, and the respective principal amounts, of the Notes to be issued.

Except as provided in Section 3.02 of the Second Supplemental Indenture, beneficial owners of Global Notes will not be entitled to receive physical delivery of Notes in the form of definitive securities, and no Global Note will be exchangeable except for another Global Note of like denomination and tenor to be registered in the name of the Depositary or its nominee. Accordingly, each person owning a beneficial interest in a Global Note must rely on the procedures of the Depositary and, if such person is not a Participant, on the procedures of the Participant through which such person owns its interest, to exercise any rights of a Holder under the Notes.

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The laws of some jurisdictions may require that certain purchasers of securities take physical delivery of those securities in definitive form. Accordingly, the ability to transfer interests in the Notes represented by a Global Note to those persons may be limited. In addition, because the Depositary can act only on behalf of its Participants, who in turn act on behalf of persons who hold interests through Participants, the ability of a person having an interest in Notes represented by a Global Note to pledge or transfer such interest to persons or entities that do not participate in the Depositary’s system, or otherwise to take actions in respect of such interest, may be affected by the lack of a physical definitive security in respect of such interest. None of the Company, the Trustee, the Paying Agent and the Registrar will have any responsibility or liability for any aspect of the records relating to or payments made on account of Notes by the Depositary, or for maintaining, supervising or reviewing any records of the Depositary relating to the Notes.

The Company may appoint one or financial institutions to act as its Paying Agents. The Company may add, replace or terminate Paying Agents from time to time. The Company may also choose to act as its own Paying Agent. The Trustee will initially act as the Company’s Paying Agent with respect to the Notes through its Corporate Trust Office presently located at 150 East 42^nd Street, 40^th Floor, New York, NY 10017, Attention: Corporate Trust Services—Administrator, Triumph Bancorp, Inc. The Company must notify the Holders of any changes in the Paying Agents.

Notices to the Holders of registered Notes in the form of definitive securities will be given to such Holders at their respective addresses in the Register, or in the case of Global Notes, electronic delivery in accordance with DTC’s applicable procedures. The Indenture contains provisions setting forth certain conditions to the institution of proceedings by the Holders of Notes with respect to the Indenture or for any remedy under the Indenture.

THIS NOTE IS GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

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ASSIGNMENT FORM

To assign the within Security, fill in the form below: I or we hereby sell, assign and transfer unto:

the within Security and all rights thereunder and hereby irrevocably appoint the Trustee as agent to transfer this Security on the books of Triumph Bancorp, Inc.. The agent may substitute another to act for it.

SIGNATURE GUARANTEE

Signatures must be guaranteed by an “eligible guarantor institution” meeting the requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program (“STAMP”) or such other “signature guarantee program” as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.

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SCHEDULE OF INCREASES OR DECREASES IN GLOBAL NOTE

The initial principal amount of this Global Note is $39,500,000. The following increases or decreases in the principal amount of this Global Note have been made:

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Exhibit 5.1

November 27, 2019

Triumph Bancorp, Inc.

12700 Park Central Drive, Suite 1700

Dallas, Texas 75251

Ladies and Gentlemen:

I am the Executive Vice President and General Counsel of Triumph Bancorp, Inc., a Texas corporation (the “Company”), and in such capacity have acted as counsel to the Company in connection with the issuance and sale by the Company of $39,500,000 aggregate principal amount of 4.875% Fixed-to-Floating Rate Subordinated Notes due 2029 (the “Securities”). The Securities are being issued under the Indenture, dated as of September 30, 2016 (such indenture, together with the Second Supplemental Indenture thereto relating to the Securities dated as of November 27, 2019, the “Indenture”), between the Company and Wells Fargo Bank, National Association, as trustee, and sold pursuant to the Underwriting Agreement, dated as of November 21, 2019 (the “Agreement”), by and between the Company and Keefe, Bruyette & Woods, Inc. The Securities have been registered under the Securities Act of 1933, as amended (the “Securities Act”), pursuant to a registration statement on Form S-3 filed by the Company with the Securities and Exchange Commission (the “Commission”), which became effective on March 30, 2018 (File No. 333-223411) (the “Registration Statement”), including a base prospectus dated March 30, 2018 (the “Base Prospectus”) and a prospectus supplement relating to the Securities dated November 21, 2019 (the “Prospectus Supplement,” and together with the Base Prospectus, the “Prospectus”).

In rendering the opinions expressed herein, I, or members of my staff, have examined and relied upon the Agreement, the Indenture, the global note evidencing the Securities, the Registration Statement, the Prospectus, the Company’s charter and bylaws, resolutions of the Company’s Board of Directors and committees thereof, certificates of public officials, certificates of corporate officers and such other documents as I have deemed necessary or appropriate as a basis for the opinions set forth below.

In making such examination and rendering the opinion set forth below, I have assumed without verification the genuineness of all signatures, the authenticity of all documents submitted to me or members of my staff as originals, the authenticity of the originals of such documents submitted to me or my staff as certified copies, the conformity to originals of all documents submitted to me or my staff as copies, the authenticity of the originals of such documents, that all documents submitted to me or my staff as certified copies are true and correct copies of such originals and the legal capacity of all individuals executing any of the foregoing documents. In making my examination of executed documents, I have assumed that the parties thereto, other than the Company, had the power, corporate or other, to enter into and perform all obligations thereunder and have also assumed the due authorization by all requisite action, corporate or other, and the execution and delivery by such parties of such documents and the validity and binding effect thereof on such parties.

Based upon the foregoing, and subject to the qualifications, assumptions and limitations stated herein, I am of the opinion that (i) the Company has the corporate power to issue the Securities, and (ii) the Securities have been duly authorized by the Company for issuance and sale pursuant to the Indenture and the Agreement.

I am a member of the bar of the State of Texas and I do not express any opinion herein concerning any law other than the Texas Business Organizations Code (including the statutory provisions, all applicable provisions of the Texas Constitution and reported judicial decisions interpreting the foregoing).

I hereby consent to the filing of this opinion letter as Exhibit 5.1 to the Current Report on Form 8-K filed by the Company on November 27, 2019 and to the use of my name under the caption “Legal Matters” in the Prospectus included in the Registration Statement. In giving such consent, I do not hereby admit that I am in the category of persons whose consent is required under Section 7 of the Securities Act and the rules and regulations of the SEC promulgated thereunder.

Exhibit 5.2

[Letterhead of Wachtell, Lipton, Rosen & Katz]

November 27, 2019

Triumph Bancorp, Inc.

12700 Park Central Drive, Suite 1700

Dallas, Texas 75251

Ladies and Gentlemen:

We have acted as special counsel to Triumph Bancorp, Inc., a Texas corporation (the “Company”), in connection with the sale to the Underwriters (as defined below) by the Company on the date hereof of an aggregate of $39,500,000 aggregate principal amount of 4.875% Fixed-to-Floating Rate Subordinated Notes due 2029 (the “Notes”), pursuant to the Underwriting Agreement, dated November 21, 2019 (the “Underwriting Agreement”), between the Company and Keefe, Bruyette & Woods, Inc. (the “Underwriter”). The Notes were issued pursuant to the Indenture, dated as of September 30, 2016, as supplemented by the Second Supplemental Indenture, dated as of November 27, 2019, between the Company and Wells Fargo Bank, National Association, as Trustee (the “Trustee”) (together, the “Indenture,” and together with the Underwriting Agreement and the Notes, the “Transaction Documents”).

The Notes were registered under the Securities Act of 1933, as amended (the “Act”), pursuant to the Registration Statement on Form S-3 (File No. 333-223411) filed by the Company under the Act with the Securities and Exchange Commission (the “Commission”), on March 30, 2018 (the “Registration Statement”). On November 22, 2019, the Company filed with the Commission a Prospectus Supplement dated November 21, 2019 (the “Prospectus”) describing the final terms of the Notes pursuant to Rule 424(b)(5) of the Act.

We have relied, to the extent we deem proper, on (i) guidance of the Staff of the Commission and (ii) oral and written representations and certificates or comparable documents of responsible officers and representatives of the Company and, in certain instances, upon the representations and warranties of the Company contained in the Transaction Documents, as well as upon certificates or other written statements from public officials. We have further assumed, to the extent we deem proper, the legal capacity of all natural persons, the genuineness of all signatures, the authenticity of all documents submitted to us as originals and the conformity to original documents of all documents submitted to us as copies and the authenticity of the originals of such copies. We have not independently verified any such information or assumptions.

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We are members of the Bar of the State of New York, and we have not considered, and we express no opinion as to, the laws of any jurisdiction other than the laws of the State of New York that a New York lawyer exercising customary professional diligence would reasonably be expected to recognize as being applicable to the Company, the Transaction Documents or the transactions governed by the Transaction Documents and the federal securities laws of the United States of America, in each case as in effect on the date hereof (the “Relevant Laws”). Without limiting the generality of the foregoing definition of Relevant Laws, the term “Relevant Law” does not include any law, rule or regulation that is applicable to the Company or the Transaction Documents or such transactions solely because such law, rule or regulation is applicable to or is part of a regulatory regime applicable to any party to any of the Transaction Documents or any of its affiliates due to the specific assets or business of such party or such affiliate.

To the extent that our opinions relate to or depend upon matters governed by Texas law, we have relied upon the opinion letter, dated the date hereof and filed as Exhibit 5.1 to the Company’s Current Report on Form 8-K, filed on the date hereof, of Adam D. Nelson, the Company’s Executive Vice President and General Counsel, and our letter is subject to the same assumptions, qualifications and limitations with respect to such matters as are contained in such letter. The opinions and other matters set forth herein are subject to the following qualifications and comments:

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Subject to and based upon the foregoing, and subject to the assumptions, exceptions, limitations, qualifications and comments stated herein, we are of the opinion that the Notes are valid and binding obligations of the Company, enforceable against the Company in accordance with their terms.

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This letter speaks only as of its date and is delivered in accordance with the requirements of Item 601(b)(5) of Regulation S-K under the Act. We hereby consent to the filing of a copy of this opinion letter as an exhibit to the Company’s Current Report on Form 8-K, filed on the date hereof, and to the use of our name in the Prospectus forming a part of the Registration Statement under the caption “Legal Matters.” In giving this consent, we do not thereby admit that we are within the category of persons whose consent is required under Section 7 of the Act.

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