UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

August 4, 2025

Date of Report (Date of earliest event reported)

TRUSTMARK CORPORATION

(Exact name of registrant as specified in its charter)

     Mississippi

     000-03683

     64-0471500

     (State or other jurisdiction
of incorporation)

     (Commission
File Number)

     (IRS Employer
Identification No.)


248 East Capitol Street, Jackson, Mississippi		39201
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code:		(601) 208-5111

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:


☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered Pursuant to Section 12(b) of the Act:


Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, no par value	TRMK	Nasdaq Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 7.01. Regulation FD Disclosure.

On August 4, 2025, Trustmark Corporation’s principal subsidiary, Trustmark National Bank, converted from a national banking association to a Mississippi-chartered banking corporation and changed its name to Trustmark Bank after receiving all necessary regulatory approvals from the Federal Reserve and the Mississippi Department of Banking and Consumer Finance. Trustmark Bank is a member bank of the Federal Reserve System and is supervised by the Federal Reserve Bank of Atlanta and the Mississippi Department of Banking and Consumer Finance.

The charter conversion will not affect the bank’s customers’ day-to-day experience with Trustmark, and customer deposits continue to be insured by the Federal Deposit Insurance Corporation to the greatest extent permitted by law.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

TRUSTMARK CORPORATION


BY:		/s/ Thomas C. Owens
		Thomas C. Owens
		Treasurer and Principal Financial Officer

DATE:		August 4, 2025

TRUSTMARK CORP 8-K