
Citadel Securities is one of the world's largest and most sophisticated market makers, handling approximately 25-30% of all US equity trading volume. Founded by Ken Griffin, the firm operates across a broad array of fixed income and equity securities, providing liquidity to institutional clients including asset managers, banks, broker-dealers, hedge funds, and government agencies. Citadel Securities is separate from Citadel LLC (the hedge fund) though both were founded by Griffin. The company has offices in Chicago, New York, London, Hong Kong, Toronto, Shanghai, Sydney, and Dublin. Known for its cutting-edge technology and quantitative approach, Citadel Securities invests heavily in engineering talent and infrastructure to maintain its competitive edge in electronic trading.
Citadel Securities is one of the world's largest and most sophisticated market makers, handling approximately 25-30% of all US equity trading volume. Founded by Ken Griffin, the firm operates across a broad array of fixed income and equity securities, providing liquidity to institutional clients including asset managers, banks, broker-dealers, hedge funds, and government agencies. Citadel Securities is separate from Citadel LLC (the hedge fund) though both were founded by Griffin. The company has offices in Chicago, New York, London, Hong Kong, Toronto, Shanghai, Sydney, and Dublin. Known for its cutting-edge technology and quantitative approach, Citadel Securities invests heavily in engineering talent and infrastructure to maintain its competitive edge in electronic trading.