AMG Names Ex-Southeastern Vice Chairman Staley Cates to Board, CEO Horgen Reappointed
AMG will add G. Staley Cates, veteran ex-Vice Chairman and President of Southeastern Asset Management, to its Board effective April 1, 2026, replacing eight-year director Karen L. Alvingham. The firm will also reappoint Jay C. Horgen as President and CEO, maintaining leadership continuity as it manages $813 billion in assets.
1. Board Appointment of Staley Cates
Effective April 1, 2026, AMG will appoint G. Staley Cates to its Board of Directors. Cates brings nearly four decades of leadership experience from Southeastern Asset Management, where he served as President from 1989 to 2015 and Vice Chairman through 2024, and holds a CFA designation.
2. Retirement of Karen L. Alvingham
Long-serving director Karen L. Alvingham will retire from the Board on April 1, 2026 after eight years of service. Her tenure included guiding AMG through periods of strategic growth and affiliate partnership expansion.
3. Executive Leadership Continuity
AMG has reappointed Jay C. Horgen as President and CEO effective April 1, 2026, ensuring stable leadership as the firm oversees $813 billion in assets under management across private markets, liquid alternatives and long-only strategies.