Sonia Gardner is an American hedge fund manager who has an estimated net worth of $350 million.

Sonia Gardner started her career as Senior Attorney at the Bankruptcy and Corporate reorganization Department at Cowen and Company. She and her brother, Marc founded Amroc Investments in 1989. A year later, they started debt brokerage firm and served as Senior Portfolio Manager. In 1995, they formed Avenue Capital Group.

She was the recipient of 100 Women in Hedge Funds' 2008 Industry Leadership Award. Gardner was elected as the new chair for Global Association Board Leadership for 2016.

Sonia Esther Lasry was born on February 16, 1962 in Marrakesh, Morocco. She received a B.A. with honors in philosophy from Clark University in 1983 and a J.D. from Cardozo School of Law in 1986.