Citadel LLC is a privately owned financial services company headquartered in the United States. Founded in 1990 by Kenneth C. Griffin, it operates as a hedge fund. As of 2021, Citadel managed over $39 billion in assets and employed approximately 4060 people.
Citadel finalized a $1 billion agreement to acquire assets from Paloma Natural Gas, representing a significant investment in the US natural gas sector. Multiple news sources reported on this acquisition in [Date not specified]. Separately, Citadel made multiple senior engineering hires in 2025. A senior quant who left Citadel in 2023 joined Balyasny.