X0508 4 2026-02-17 0000036146 TRUSTMARK CORP TRMK 0001263552 DEWEY DUANE A P. O. BOX 291 JACKSON MS 39205 1 1 0 0 President & CEO 0 Common Stock 2026-02-17 4 A 0 23260 0 A 157141 D Common Stock 2026-02-17 4 F 0 8847 44.82 D 148294 D Common Stock 5757 I By Company-Sponsored 401(k) Reflects 165% vesting of performance-based restricted stock units granted February 15, 2023, under the Trustmark Corporation Amended and Restated Stock and Incentive Compensation Plan. The performance period for the award ended on December 31, 2025, and vesting of the award was certified by the Human Resources Committee on February 17, 2026. Shares withheld to satisfy tax withholding obligations in connection with vesting of performance-based restricted stock units granted February 15, 2023. Duane Dewey by Granville Tate, Jr., POA 2026-02-18