Citadel is a prominent investment firm based in the United States with its headquarters in Chicago, Illinois. Founded in 1990 by Kenneth C. Griffin, Citadel has grown to become one of the largest and most successful hedge fund managers in the world.

Citadel offers a wide range of financial services, including investment management, securities trading, and investment banking. The company manages assets for institutional investors and high net worth individuals through its various investment strategies, such as equities, credit, and quantitative strategies. Operating on a global scale, Citadel has established a strong presence in major financial centers across North America, Europe, and Asia.

The firm operates through several subsidiaries, including Citadel Securities, an electronic market making and trading firm, and Citadel Technology, a technology service provider to the financial industry. Citadel also has strategic partnerships with established firms, such as E*TRADE Financial and KCG Holdings. In terms of its market position, Citadel is widely regarded as one of the top investment firms in the world.

It competes with other prominent hedge fund managers, such as Bridgewater Associates and Renaissance Technologies. Despite increasing competition, Citadel has been successful in maintaining a strong track record of performance and attracting top talent in the industry. Over the years, Citadel has achieved numerous milestones and undergone significant changes.

In 2006, the firm launched Citadel Securities, expanding its presence in the trading and market making sector. In 2017, Citadel acquired the investment management division of the hedge fund manager, Surveyor Capital, further expanding its asset management capabilities. Currently, Citadel operates as a diversified financial institution with a focus on alternative asset management and electronic trading.

While the latest updates or key information may not be available, Citadel continues to play a vital role in global financial markets and remains a dominant force in the investment industry