SEC Filing Summary

Thomas Joseph Gallagher, President of Arthur J. Gallagher & Co., reported a transaction on July 1, 2026. He acquired 351.945 shares of Common Stock at a price of $229.57 per share, increasing his post-transaction holdings to 323,743.025 shares. Additionally, a distribution of 351.945 notional stock units, representing deferred compensation, was made in the form of Gallagher common stock. These units are in accordance with the Supplemental Savings and Thrift Plan. The filing also details various derivative holdings, including non-qualified stock options and phantom stock, with different exercise dates and prices, as well as non-derivative holdings in various trusts and accounts.