Shawn P. McLaughlin's Stock Purchase and Power of Attorney

Shawn P. McLaughlin, a director of Burke & Herbert Financial Services Corp., purchased 1,000 shares of common stock on October 28, 2025, at a price of $61 per share. Following this transaction, McLaughlin directly owns 67,000 shares. Additionally, McLaughlin has granted a Power of Attorney to several individuals, including Matthew Rucker, to act on his behalf in matters related to SEC filings and EDGAR system management. This includes the preparation, execution, and submission of various SEC forms and schedules, as well as the management of his EDGAR account. The Power of Attorney remains in effect until McLaughlin is no longer required to file certain SEC forms.