Form 4 Filing for O'DONNELL SHANNON

Shannon O'Donnell, Senior Vice President of AUBURN NATIONAL BANCORPORATION, INC, was granted 1084 Restricted Stock Units (RSUs) on June 5, 2026. These RSUs are part of the 2024 Equity and Incentive Compensation Plan and will vest in tranches of 33% on June 5, 2027, 33% on June 5, 2028, and 34% on June 5, 2029, contingent upon continued employment. Each RSU converts into one share of common stock upon vesting. Dividend equivalents will accrue in the form of additional RSUs. Following this transaction, O'Donnell directly owns 1875 shares of common stock, par value $0.01. The filing was made on June 8, 2026.