SEC Filing Summary

Jay C. Horgen, President and CEO of AFFILIATED MANAGERS GROUP, INC. (AMG), reported several transactions on June 8, 2026. Horgen acquired 75,000 shares of Common Stock at a price of $74.49 per share, increasing his post-transaction holdings to 261,877 shares. Additionally, he disposed of 39,671 shares at an average price of $336.62 and another 17,500 shares at $338.27. These disposals reduced his post-transaction holdings to 222,206 and 204,706 shares, respectively. A footnote indicates that 150,000 shares were transferred to a grantor retained annuity trust. Horgen also exercised an employee stock option to buy 75,000 shares of Common Stock, with the option expiring on August 15, 2026. His indirect holdings include 34,058 shares held by family trusts and 350,000 shares held by GRATs.