SEC Filing Summary

Walter D. Bay, General Counsel at Arthur J. Gallagher & Co. (AJG), reported several transactions on March 15, 2026. These include the acquisition and vesting of 7090 restricted common stock units, initially awarded on March 15, 2023. Additionally, Bay exercised and disposed of certain stock options and acquired shares of common stock. Post-transaction, Bay holds 491.129 shares of common stock indirectly through the Gallagher 401(k) plan. The filing also details holdings in various non-qualified stock options, notional stock units, and phantom stock, with exercise prices and expiration dates specified. These derivative holdings are all directly owned by Bay.