Affiliated Managers Group, Inc.

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. On February 2

Regulation FD Disclosure. On February 26, 2026, the Company issued a press release announcing the matters described above, which is furnished as Exhibit 99.1 he

Financial Statements and Exhibits. (d) Exhibits. Exhibit No. Description 99.1 Press Release issued by the Company on February 26, 2026. 104 Cover Page Interacti