This Inside Philanthropy article profiles seven leading foundations shaping the aging field, including The John A. Hartford Foundation, The SCAN Foundation, and the Harry and Jeanette Weinberg Foundation, highlighting how they invest in advocacy, research, systems change, and age-friendly communities. The piece also features insights from Lindsay Goldman, CEO of Grantmakers in Aging, who underscores the importance of collaboration across funders and lifts up efforts like pooled funds and shared policy strategies to strengthen the aging sector overall. (Note: Access requires a paid Inside Philanthropy subscription.)