Ken Griffin runs Citadel Advisors, a multi-strategy overseeing $146.99B in disclosed equity holdings (SEC CIK 0001423053). The latest portfolio (2025Q4) discloses 5870 positions across 11 sectors, with the largest positions in NVDA, AMZN and DIA. On a mark-to-market basis the tracked portfolio has returned 26.6% over the past year. OpenStocks tracks 40 consecutive quarterly snapshots for this manager — every position change, new entry, and exit is logged below.