Form 4 Filing for AAON, INC.

Gary D. Fields, a director at AAON, INC., reported a series of transactions on May 26, 2026. Fields acquired 21,173 shares of Common Stock through the exercise of a stock option at a price of $48.91 per share. Concurrently, he disposed of 21,173 shares of Common Stock at a weighted average price of $140.34 per share. Following these transactions, Fields holds 55,425 shares directly and has 34,252 shares directly. Additionally, he holds 6,249 shares through a 401(k) Plan and 9,250 shares as custodian for his grandchildren.