Current Report Filing

This report details Arthur J. Gallagher & Co. (the "Company") announcing plans to host an investor meeting on Tuesday, March 17, 2026. A webcast of the meeting and related presentation materials, including an updated "CFO Commentary," are available through the investor relations page of the Company's website. The CFO Commentary includes estimates for 2026 results, net after-tax cash flows from clean energy investments in 2026 and future years, and cautionary language regarding forward-looking statements. The filing is made pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934.