43. NANCY ZIMMERMAN

$725 million  SOURCE: Hedge funds AGE: 58 • RESIDENCE: Boston SELF-MADE SCORE:  A pioneer of absolute return investing, Zimmerman is the cofounder of Bostonbased hedge fund manager Bracebridge Capital. The firm manages some $12 billion in net assets for endowments, foundations and family offices. During the pandemic, the Goldman Sachs alum helped fund a pilot program to expand testing for residents, staff and visitors at affordable senior housing complexes.