Citadel Securities is a leading global market maker that provides liquidity in various financial markets. Founded in 2002, it plays a crucial role in facilitating trading by buying and selling securities, which helps ensure that markets operate smoothly and efficiently. The firm is a subsidiary of Citadel LLC, a prominent hedge fund and financial services company. Citadel Securities employs advanced technology and quantitative strategies to execute trades quickly and at competitive prices, serving a wide range of clients, including institutional investors and retail brokerages.