Form 4 Filing for AAON, INC.

This Form 4 filing details transactions by Gordon Douglas Wichman, Executive Vice President of AAON, INC. On March 12, 2026, Wichman disposed of 89 shares of Common Stock (par value $.004) at $91.51 per share, followed by another disposal of 55 shares at the same price. These transactions resulted in post-transaction shareholdings of 10,128 and 10,073 shares, respectively. The filing also includes information on derivative holdings, specifically various stock options to buy Common Stock with exercise dates ranging from March 11, 2020, to March 11, 2026, and expiration dates extending to March 11, 2035. Additionally, Wichman holds 4,526 shares of Common Stock through a 401(k) Plan, indicating indirect ownership.