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TRUSTMARK CORP

For the period ended Apr 28, 2026. Filed Mar 16, 2026.

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About this filing

What shareholders are asked to vote on at a company's meeting. It is where to find what directors and top executives are paid, and who owns the most shares.

Apr 28, 2026 · Filed Mar 16, 2026

TRMK$44.64-0.2%Stored close · as of Nov 6, 2026
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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No. __)

Filed by the Registrant☒
Filed by a Party other than the Registrant☐

Check the appropriate box:

☐Preliminary Proxy Statement
☐Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
☒Definitive Proxy Statement
☐Definitive Additional Materials
☐Soliciting Material Pursuant to §240.14a-12

Trustmark Corporation

(Name of Registrant as Specified in Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than Registrant)

Payment of Filing Fee (Check the appropriate box):

☒No fee required.
☐Fee paid previously with preliminary materials.
☐Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

Proxy 2026 Statement Annual Meeting Notice & proxy Statement

Notice of Annual Meeting of Shareholders

The 2026 Annual Meeting of Shareholders of Trustmark Corporation (Trustmark) will be held as follows:

DATE AND TIME

Tuesday, April 28, 2026, at 1:00 p.m. CT

VIRTUAL ATTENDANCE

The Annual Meeting will be held virtually. You will be able to attend, vote and submit questions during the Annual Meeting by visitingwww.virtualshareholdermeeting.com/TRMK2026 and entering the 16-digit control number printed in the box marked by the arrow on your proxy card or printed on your voting instruction form, Notice of Internet Availability of Proxy Materials, or email previously received.

ITEMS OF BUSINESS

1)To elect a board of 11 directors to hold office for the ensuing year or until their successors are elected and qualified.
2)To provide advisory approval of Trustmark’s executive compensation.
3)To ratify the selection of Crowe LLP as Trustmark’s independent auditor for the fiscal year ending December 31, 2026.
4)To transact such other business as may properly come before the meeting.

RECORD DATE

Shareholders of record on March 2, 2026, are entitled to notice of and to vote at the Annual Meeting.

PROXY VOTING/REVOCATION

Your vote is important. You are urged to vote your shares as soon as possible, whether or not you plan to attend the meeting. Please vote your shares in one of the following ways:

•Via Internet by following the instructions on the Notice of Internet Availability or proxy card.
•Via your smartphone by following the instructions on the Notice of Internet Availability or proxy card.
•If you received a printed copy of the proxy statement, you may also vote your shares by signing and returning the enclosed proxy card in the reply envelope provided.

If you attend the virtual meeting, you may revoke your proxy prior to the voting thereof. You may also revoke your proxy by following the instructions on page 4 of the proxy statement.

Granville Tate, Jr.

Secretary

March 16, 2026

Trustmark Corporation P. O. Box 291 Jackson, Mississippi 39205

March 16, 2026

Dear Shareholder:

On behalf of your Board of Directors, we cordially invite you to attend Trustmark’s Annual Shareholders’ Meeting, which will be held virtually on April 28, 2026, at 1:00 p.m. CT. At the meeting, you will have the opportunity to elect 11 directors who bring diverse perspectives and valuable leadership skills to Trustmark. Their guidance will enable us to successfully compete in an evolving industry and continue our steadfast commitment to the customers, associates, shareholders, and communities we have the privilege of serving. Your vote is important to us. The proposals to be considered are described in this proxy statement, and instructions on how to vote your shares may be found on page 4. We encourage you to vote your shares in advance of the meeting to ensure the presence of a quorum.

Trustmark’s momentum continued to build throughout the year, resulting in record earnings in 2025. Our traditional banking business drove continued loan and deposit growth, a strong net interest margin, and solid credit quality. Our mortgage banking business achieved increased production and significant improvement in profitability while revenue in our wealth management business reached anall-time high. We have a tremendous team of associates focused on expanding customer relationships and demonstrating the value Trustmark can provide as their trusted financial partner. Looking forward, we will continue to build upon this momentum and pursue opportunities to leverage investments in technology that will broaden our reach, enhance customer experience, and improve efficiency. Trustmark is well-positioned to meet the needs of our customers and build long-term value for our shareholders.

We invite you to review our Form 10-K and our 2025 Year in Review, both of which are available at investorrelations.trustmark.com or in hard copy upon request. These documents will provide more detailed information about your company.

Thank you for your continued support of Trustmark and your participation in this important process.

Sincerely,

Gerard R. Host Chair of the BoardDuane A. Dewey President and Chief Executive Officer
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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.