Citadel Advisors

Citadel Advisors acquired much of the $16 billion public-equity book of Leopold Aschenbrenner's AI-focused fund Situational Awareness after its portfolio fell 67% in July, then shed more than 80% of t…

Citadel Advisors, the hedge fund led by Ken Griffin, disclosed new Q2 2026 stakes in SpaceX, Cerebras Systems, and Quantinuum, while its 13F equity portfolio grew 41.5% to $875.1 billion from $618.5 b…