Gary Scott Gensler (born October 18, 1957) is an American former government official and former investment banker who served as the chair of the U.S. Securities and Exchange Commission (SEC) from 2021 to 2025. Gensler previously worked for Goldman Sachs and led the Biden–Harris transition's Federal Reserve, Banking, and Securities Regulators agency review team. Before his appointment, he was professor of Practice of Global Economics and Management at the MIT Sloan School of Management.

Gensler served as the 11th chairman of the Commodity Futures Trading Commission, under President Barack Obama, from May 26, 2009, to January 3, 2014. He was the Under Secretary of the Treasury for Domestic Finance (1999–2001), and the Assistant Secretary of the Treasury for Financial Markets (1997–1999). Before his career in the federal government, Gensler worked at Goldman Sachs, where he was a partner and co-head of finance. Gensler also served as the CFO for the Hillary Clinton 2016 presidential campaign. President Joe Biden nominated Gensler to serve as 33rd chair of the U.S. Securities and Exchange Commission. He succeeded SEC Acting Chair Allison Lee.