8-KLeadership ChangesRegulation FDExhibits & Filings

AFFILIATED MANAGERS GROUP, INC. 8-K Report, Executive Changes (Feb 26, 2026)

Filed February 26, 2026For Securities:AMGMGRBMGRMGRDMGRE

Summary

Affiliated Managers Group, Inc. (AMG) has announced a key change to its Board of Directors and a leadership update. Effective April 1, 2026, G. Staley Cates will join the Board as an independent director. Mr. Cates brings extensive experience from his long tenure at Southeastern Asset Management, Inc., where he held significant leadership roles including Vice Chairman and President, and possesses a Chartered Financial Analyst designation. His appointment is expected to enhance the Board's expertise, particularly given his background in investment management. In addition to Mr. Cates' appointment, the Company also announced the re-appointment of Jay C. Horgen as President, a role he will continue to hold alongside his position as Chief Executive Officer, effective April 1, 2026. Concurrently, Karen L. Alvingham will retire from the Board of Directors on the same date. These changes are being communicated via a press release filed with the SEC, highlighting the company's ongoing governance and leadership evolution.

Key Highlights

  • 1G. Staley Cates appointed as an independent director to the Board of Directors, effective April 1, 2026.
  • 2Mr. Cates brings significant experience from Southeastern Asset Management, Inc., having served as Vice Chairman and President.
  • 3Mr. Cates is a Chartered Financial Analyst (CFA), suggesting deep financial and investment expertise.
  • 4Karen L. Alvingham to retire from the Board of Directors, effective April 1, 2026.
  • 5Jay C. Horgen re-appointed as President, continuing in his role as CEO, effective April 1, 2026.
  • 6All announcements were made on February 26, 2026, and are detailed in a furnished press release.
  • 7No related-person transactions or specific compensation details beyond the standard director program were disclosed for Mr. Cates.

Frequently Asked Questions

This 8-K filing primarily announces changes to Affiliated Managers Group's Board of Directors and executive leadership, including the appointment of a new independent director and the re-appointment of the President/CEO.

G. Staley Cates is a new independent director joining AMG's Board. He has extensive experience in the investment management industry, having served as Vice Chairman and President of Southeastern Asset Management, Inc. His expertise as a Chartered Financial Analyst is likely to be valuable to the Board's oversight and strategic direction.

Jay C. Horgen's re-appointment as President, while continuing as CEO, signals leadership continuity. This suggests the Board has confidence in his current strategy and execution. For investors, it indicates stability in the company's top leadership roles.

The filing states that Mr. Cates will participate in the Company’s customary director compensation program and will enter into the standard indemnification agreement for directors. No specific new compensation details beyond the standard program were disclosed in this filing.