Citadel LLC is an American hedge fund and financial services company founded in 1990 by Kenneth Griffin, who remains CEO and majority owner. The firm relocated its headquarters from Chicago to Miami in 2024 and is planning a new 1.75-million-square-foot office tower at Brickell Bay Drive. With more than $66 billion in combined equity, performance allocations and other capital as of May 2025, Citadel serves institutional investors, pension funds and high-net-worth clients through a range of pooled vehicles. It employs roughly 2,900 professionals across North America, Europe and Asia. In 2024, LCH Investments named Citadel the most profitable hedge fund manager of all time.
Citadel’s investment strategies span commodities, credit and convertible securities, equities, fixed income and macro markets as well as global quantitative methods. Its equity platform includes sub-teams such as Citadel Global Equities, Surveyor Capital, Ashler Capital and Citadel International Equities. Using proprietary models, statistical research and scalable technology, the firm seeks to identify underappreciated trends and price inefficiencies. Citadel also operates major businesses in commodities risk solutions covering natural gas, power and environmental products, providing clients with tools to manage market exposure and capitalize on return potential.
Clean energy initiatives play an increasingly visible role in Citadel’s outlook, led by Griffin’s personal investment in ventures like X-energy, which focuses on advanced small modular nuclear reactors designed for carbon-free electricity. Griffin has emphasized the need for North America to grow electric vehicle and solar capacity alongside nuclear power. While Citadel does not publicly list dedicated battery technology funds, its commodities operations and interest in energy storage solutions such as Tesla’s Megapack underscore an indirect engagement with the evolving market for large-scale power storage.
