Trustmark Corp 2025年度报告

FORM 11-K (Mark One) ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2025 OR ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _____ to _____ Commission File Number 000-03683 Full title of the plan and the address of the plan, if different from that of the issuer named below: Trustmark 401(k) Plan Name of issuer of the securities held pursuant to the plan and the address of its principal executive office: TRUSTMARK CORPORATION 248 E. Capitol Street Jackson, Mississippi 39201 Audited Financial StatementsYears Ended December 31, 2025 and 2024 CONTENTS Report of Independent Registered Public Accounting Firm1Audited Financial StatementsStatements of Net Assets Available for Benefits2Statements of Changes in Net Assets Available for Benefits3Notes to Financial Statements4-12Supplemental ScheduleSchedule H, Line 4(i) - Schedule of Assets (Held at End of Year)14 Report of Independent Registered Public Accounting Firm The Associate Benefits Subcommittee and ParticipantsTrustmark 401(k) PlanJackson, Mississippi Opinion on the Financial Statements We have audited the accompanying statements of net assets available for benefits of the Trustmark 401(k) Plan (the “Plan”) as ofDecember 31, 2025 and 2024, the related statements of changes in net assets available for benefits for the years then ended and therelated notes (collectively, the financial statements). In our opinion, the financial statements present fairly, in all material respects, thenet assets available for benefits of the Plan as of December 31, 2025 and 2024, and the changes in net assets available for benefits forthe years then ended in conformity with accounting principles generally accepted in the United States of America. Basis for Opinion These financial statements are the responsibility of the Plan’s management. Our responsibility is to express an opinion on the Plan’sfinancial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting OversightBoard (United States) (“PCAOB”) and are required to be independent with respect to the Plan in accordance with the U.S. federalsecurities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB. We conducted our auditsin accordance with the standards of the PCAOB. Those standards require that we plan and perform the auditto obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.The Plan is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part ofour audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressingan opinion on the effectiveness of the Plan’s internal control over financial reporting. Accordingly, we express no such opinion. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due toerror or fraud, and performing procedures to respond to those risks. Such procedures included examining, on a test basis, evidenceregarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles usedand significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believethat our auditsprovide a reasonable basis for our opinion. Supplemental Information The supplemental information included in Schedule H, Line 4(i) – Schedule of Assets (Held at End of Year) as of December 31, 2025,has been subjected to audit procedures performed in conjunction with the audits of the Plan’s financial statements. The supplementalinformation is the responsibility of the Plan’s management. Our audit procedures included determining whether the supplementalinformation reconciles to the financial statements or the underlying accounting and other records, as applicable, and performingprocedures to test the completeness and accuracy of the information presented in the supplemental information. In forming our opinionon the supplemental information in the accompanying schedule, we evaluated whether the supplemental information, including itsform and content, is presented in conformity with the Department of Labor’s Rules and Regulations for Reporting and Disclosureunder the Employee Retirement Income Security Act of 1974. In our opinion, the supplemental information in the accompanyingschedule is fairly stated in all material respects, in relation to the financial statements as a whole. /s/ Baker Tilly US, LLP Peachtree Corners, Georgia June 29, 2026 We have served as the Plan’s auditor since 2025. TRUSTMARK 401(k) PLANStatements of Net Assets Available for BenefitsDecember 31, 2025 and 2024 TRU