Nancy Lerner, born in 1960, is an American billionaire investor, philanthropist, and business executive. She is a key member of the Lerner family, which built a vast real estate empire through Lerner Enterprises, founded by her father, Theodore N. Lerner, in 1952. As the sister of Mark D. Lerner, Nancy serves as a co-managing principal of the family-owned company, overseeing a portfolio that includes commercial properties, residential developments, and ownership stakes in professional sports teams, notably the Washington Nationals Major League Baseball franchise acquired by the family in 2006. Her involvement in the business has contributed to the family's status as one of the wealthiest in the United States, with Forbes estimating the Lerner family's net worth at approximately $6.4 billion as of 2023. Beyond her business roles, Nancy Lerner is actively engaged in philanthropy, supporting initiatives in education, healthcare, arts, and Jewish causes primarily in the Washington, D.C., metropolitan area. She has served on boards of various nonprofit organizations, including the United States Holocaust Memorial Museum Council and the Washington Nationals Philanthropies, and contributed to community development projects aligned with the family's legacy of giving back. Her low-profile approach contrasts with the high visibility of the family's sports ownership, yet she plays a pivotal role in sustaining the Lerner Enterprises' operations and charitable endeavors. She is also a graduate of the University of Michigan.