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 Second Quarter and First Half of 2025 Company reports Diluted EPS of $2.80, Economic EPS of$5.39 in the second quarter of 2025 WEST PALM BEACH, FL, July 31, 2025 — AMG, a strategic partner to leading independent investment management firms globally, today reported its financial and operating results for the second quarter and six months ended June 30, 2025 ...