Form 4 Filing for Arthur J. Gallagher & Co. - Insider Transactions

This filing details insider transactions for Walter D. Bay, General Counsel at Arthur J. Gallagher & Co., on December 19, 2025. Mr. Bay acquired 15,850 shares of common stock at a price of $79.59 per share. Concurrently, he disposed of 15,850 shares of common stock at $255.00 per share and disposed of 1,724 shares with no cost. The filing also reports on various derivative transactions, including the acquisition and disposition of stock options and phantom stock. Post-transaction, Mr. Bay holds 77,825 shares of common stock directly and 418.689 shares indirectly through a 401(k) plan. Several stock options with varying exercise prices and expiration dates are listed, alongside holdings in phantom stock and notional stock units.