Investor and Media Relations: Patricia Figueroa Exhibit 99.1 +1 (617) 747-3300 ir@amg.com pr@amg.com AMG Reports Financial and Operating Results for the Third Quarter and Nine Months Ended 2025 Company reports Diluted EPS of $6.87, Economic EPS of$6.10 in the third quarter of 2025 WEST PALM BEACH, FL, November 3, 2025 — AMG, a strategic partner to leading independent investment management firms globally, today reported its financial and operating results for the third quarter and nine months ended Septembe ...