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Retirement Plans | 3 Months Ended
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Mar. 31, 2026
Retirement Benefits [Abstract] |
Retirement Plans | 12. Retirement Plans The Company offers a qualified defined benefit pension plan, the Hancock Whitney Corporation Pension Plan and Trust Agreement (“Pension Plan”), that covers certain eligible associates and is closed to new entrants. The Company makes contributions to the Pension Plan in amounts sufficient to meet funding requirements set forth in federal employee benefit and tax laws, plus such additional amounts as the Company may determine to be appropriate. The Company made no contributions to the pension plan during the three months ended March 31, 2026 and 2025, and does not anticipate being required to make a contribution during 2026. The Company also sponsors a nonqualified defined benefit plan covering certain associates, under which accrued benefits were frozen and no future benefits are accrued under this plan. The Company sponsors defined benefit post-retirement plans for certain associates that provide health care and life insurance benefits. These plans are closed to new entrants. The following table shows the components of net periodic benefit cost included in expense for the periods indicated.
|  | Three Months Ended March 31, |
|  | Pension Benefits |  |  | Other Post-Retirement Benefits |
(in thousands) |  | 2026 |  |  | 2025 |  |  | 2026 |  |  | 2025 |
Service cost |  | $ | 1,525 |  |  | $ | 1,600 |  |  | $ | 9 |  |  | $ | 9 |
Interest cost |  |  | 6,593 |  |  |  | 6,275 |  |  |  | 154 |  |  |  | 154 |
Expected return on plan assets |  |  | (12,075 | ) |  |  | (11,268 | ) |  |  | — |  |  |  | — |
Amortization of net (gain) or loss and prior service costs |  |  | 202 |  |  |  | 1,140 |  |  |  | (185 | ) |  |  | (185 | )
Net periodic benefit cost |  | $ | (3,755 | ) |  | $ | (2,253 | ) |  | $ | (22 | ) |  | $ | (22 | )
Service cost is reflected in the “Benefit expense” line item of the Consolidated Statements of Income. Components other than service cost in the in the table above are reflected in “Net other retirement expense” in Note 9 – Other Noninterest Expense, and reported in the “Other expense” line item of the Consolidated Statements of Income. Additional information related to the Company’s retirement plans, including a defined contribution 401(k) plan, is provided in Note 18 to the consolidated financial statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025.

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