TRMK · Trustmark Corp

Includes 32 shares acquired through TRMK Employee and Director Stock Purchase Plan as of April 28, 2026.

Includes 392 shares acquired through TRMK Employee and Director Stock Purchase Plan as of April 28, 2026.

Includes 1698 shares acquired through TRMK Employee and Director Stock Purchase Plan and 461 through dividend reinvestment plan as of April 28, 2026.

Includes 379 shares acquired through TRMK Employee and Director Stock Purchase Plan as of April 28, 2026.

Includes 39 shares acquired through TRMK Employee and Director Stock Purchase Plan and 1 share acquired through dividend reinvestment plan as of April 28, 2026.

Includes 119 shares acquired through dividend reinvestment plan as of April 28, 2026.

Includes 62 shares acquired through TRMK Employee and Director Stock Purchase Plan and 3 shares acquired through dividend reinvestment plan as of April 28, 2026.

Includes 17 shares acquired through TRMK Employee and Director Stock Purchase Plan and 461 shares acquired through dividend reinvestment program as of April 28, 2026.

Includes 18 shares acquired through TRMK Employee and Director Stock Purchase Plan and 702 shares acquired through dividend reinvestment as of April 28, 2026.

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.

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.

Shares withheld to satisfy tax withholding obligations in connection with vesting of performance-based restricted stock units granted February 15, 2023.

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.

Reflects 165% vesting of performance-based restricted stock award 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.

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.

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.

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 granted February 15, 2023.

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.

Shares withheld to satisfy tax withholding obligations in connection with vesting of performance-based restricted stock units granted February 15, 2023.

Shares withheld to satisfy tax withholding obligation in connection to vesting of restricted stock units granted February 15, 2023.

Includes 141 shares acquired through TRMK Employee and Director Stock Purchase Plan as of February 2, 2026.

Shares withheld to satisfy tax withholding obligation in connection to vesting of restricted stock units granted February 15, 2023.

Includes 224 shares acquired through dividend reinvestment plan as of December 31, 2025.

Shares withheld to satisfy tax withholding obligation in connection to vesting of restricted stock units granted February 15, 2023.

Shares withheld to satisfy tax withholding obligation in connection to vesting of restricted stock units granted February 15, 2023.

Shares withheld to satisfy tax withholding obligation in connection to vesting of restricted stock units granted February 15, 2023.

Shares withheld to satisfy tax withholding obligation in connection to vesting of restricted stock units granted February 15, 2023.

Shares withheld to satisfy tax withholding obligation in connection to vesting of restricted stock units granted February 15, 2023.

Shares withheld to satisfy tax withholding obligation in connection to vesting of restricted stock units granted February 15, 2023.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $37.27 to $37.17, inclusive. The reporting person undertakes to provide to Trustmark Corporation, any security holder of Trustmark Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form.

Includes 32 shares acquired through TRMK Employee and Director Stock Purchase Plan and 2 shares acquired through dividend reinvestment plan as of November 1, 2025.

The reporting person is the trustee or a co-trustee of the named trust and members of his immediate family are the sole beneficiaries of the trust.