Citadel
Ken Griffin (founder/CEO since 1990). Multi-strategy giant; the most profitable hedge fund in history (~$90B net gains since inception).
A multi-strategy/multi-PM platform — quantitative and fundamental blended — not a pure systematic shop, but its 13F is one of the largest and most options-heavy filed. The visible book is dominated by index-option overlays (SPY/QQQ puts and calls) and large single-name positions including NVDA, Tesla, Apple, Microsoft and NVDA calls. The ~$618B reported value is gross notional (options counted at notional), wildly overstating directional AI exposure. Treat as platform-wide flow, hedges, and many independent PM books netted together.
Top holdings
Among largest reported equity positions Q1 2026; also holds NVDA call options — the AI-trade core.
Largest notional lines — index hedges/overlays — flow and hedging, NOT a bearish conviction call.
Top holding — Mag-7; large call-option line.
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Our take
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