Citadel Securities

Citadel Securities is a global market-making and trading firm founded in 2002, led by CEO Peng Zhao. The firm provides liquidity and trade execution across equities, options, fixed income, FX, and other securities to both retail and institutional clients. Known for its heavy investment in quantitative research, technology, and risk management, Citadel Securities operates in dozens of markets worldwide, executing a large share of U.S. retail equity volume and serving as a designated market maker on major exchanges.