144 0001776685 XXXXXXXX LIVE 0001004434 AFFILIATED MANAGERS GROUP, INC. 001-13459 777 SOUTH FLAGLER DRIVE SUITE 1401 EAST TOWER WEST PALM BEACH FL 33401 (800) 345-1100 Wojcik Thomas M Officer Common Fidelity Brokerage Services LLC

245 Summer Street Boston MA 02110

46878 13083415.41 26684730 03/09/2026 NYSE Common 08/15/2021 Stock Award Issuer N 2306 08/15/2021 Compensation Common 03/05/2025 Stock Award Issuer N 13622 03/05/2025 Compensation Common 01/01/2022 Stock Award Issuer N 1916 01/01/2022 Compensation Common 03/05/2023 Stock Award Issuer N 15595 03/05/2023 Compensation Common 03/05/2024 Stock Award Issuer N 9306 03/05/2024 Compensation Common 01/01/2023 Stock Award Issuer N 1253 01/01/2023 Compensation Common 01/01/2024 Stock Award Issuer N 1243 01/01/2024 Compensation Common 08/15/2022 Stock Award Issuer N 1637 08/15/2022 Compensation N Thomas Wojcik C/O AFFILIATED MANAGERS GROUP, INC.

777 SOUTH FLAGLER DRIVE West Palm Beach FL 33401

Common Stock 03/06/2026 8000 2290383.20 03/09/2026 /s/ Audrey Skillern as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Thomas Wojcik