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Parent Company Only Financial Information | 12 Months Ended
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Dec. 31, 2025
Condensed Financial Information Disclosure [Abstract] |
Parent Company Only Financial Information | Note 21 – Parent Company Only Financial Information ($ in thousands)
Condensed Balance Sheets |  | December 31, |
|  | 2025 |  |  | 2024 |
Assets: |  |  |  |  |  |
Investment in banks |  | $ | 2,217,339 |  |  | $ | 2,062,555 |
Other assets |  |  | 141,547 |  |  |  | 86,907 |
Total Assets |  | $ | 2,358,886 |  |  | $ | 2,149,462 |
Liabilities and Shareholders' Equity: |  |  |  |  |  |
Accrued expense |  | $ | 3,387 |  |  | $ | 1,577 |
Subordinated notes |  |  | 171,966 |  |  |  | 123,702 |
Junior subordinated debt securities |  |  | 61,856 |  |  |  | 61,856 |
Shareholders' equity |  |  | 2,121,677 |  |  |  | 1,962,327 |
Total Liabilities and Shareholders' Equity |  | $ | 2,358,886 |  |  | $ | 2,149,462 |
Condensed Statements of Income |  | Years Ended December 31, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
Revenue: |  |  |  |  |  |  |  |  |
Dividends received from banks |  | $ | 155,440 |  |  | $ | 82,536 |  |  | $ | 67,189 |
Earnings of subsidiaries over distributions |  |  | 78,537 |  |  |  | 148,884 |  |  |  | 106,388 |
Other income |  |  | 156 |  |  |  | 165 |  |  |  | 163 |
Total Revenue |  |  | 234,133 |  |  |  | 231,585 |  |  |  | 173,740 |
Expense: |  |  |  |  |  |  |  |  |
Other expense |  |  | 9,998 |  |  |  | 8,576 |  |  |  | 8,251 |
Total Expense |  |  | 9,998 |  |  |  | 8,576 |  |  |  | 8,251 |
Net Income |  | $ | 224,135 |  |  | $ | 223,009 |  |  | $ | 165,489 |
Condensed Statements of Cash Flows |  | Years Ended December 31, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
Operating Activities: |  |  |  |  |  |  |  |  |
Net income |  | $ | 224,135 |  |  | $ | 223,009 |  |  | $ | 165,489 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |
Net change in investment in subsidiaries |  |  | (78,537 | ) |  |  | (148,884 | ) |  |  | (106,388 | )
Other |  |  | 605 |  |  |  | (835 | ) |  |  | (797 | )
Net cash from operating activities |  |  | 146,203 |  |  |  | 73,290 |  |  |  | 58,304 |
Financing Activities: |  |  |  |  |  |  |  |  |
Net proceeds from subordinated notes |  |  | 171,936 |  |  |  | — |  |  |  | — |
Payment of subordinated notes |  |  | (125,000 | ) |  |  | — |  |  |  | — |
Common stock dividends |  |  | (58,456 | ) |  |  | (56,790 | ) |  |  | (56,653 | )
Repurchase and retirement of common stock |  |  | (80,036 | ) |  |  | (7,499 | ) |  |  | — |
Net cash from financing activities |  |  | (91,556 | ) |  |  | (64,289 | ) |  |  | (56,653 | )
Net change in cash and cash equivalents |  |  | 54,647 |  |  |  | 9,001 |  |  |  | 1,651 |
Cash and cash equivalents at beginning of year |  |  | 86,512 |  |  |  | 77,511 |  |  |  | 75,860 |
Cash and cash equivalents at end of year |  | $ | 141,159 |  |  | $ | 86,512 |  |  | $ | 77,511 |
Trustmark paid income taxes of $52.2 million in 2025, $21.5 million in 2024 and $38.8 million in 2023. Trustmark (parent company only) paid interes t of $4.5 million in 2025, 2024 and 2023.

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- Definition The entire disclosure for condensed financial information, including the financial position, cash flows, and the results of operations of the registrant (parent company) as of the same dates or for the same periods for which audited consolidated financial statements are being presented. Alternatively, the details of this disclosure can be reported by the specific parent company taxonomy elements, indicating the appropriate date and period contexts in an instance document. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 Reference 4: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481231/810-10-45-11 + Details
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