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Built from publicly disclosed institutional and insider activity. Informational purposes only - not investment advice.OpenStocks · v0.1
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  1. Home/
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  3. Ken Griffin (Citadel Advisors)
  • Overview
  • Portfolio5.9k
  • Performance40Q
  • Options6.6k
  • Activity105k
  • News
Multi-Strategy · CIK 0001423053

Ken Griffin

Citadel Advisors
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  • Mega-Fund

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.

Track Ken's filingsView holdings↓
Portfolio
$146.99B
Positions
5870
Quarter
2025Q4
Filings tracked
40
1Y+26.6%Since filing+128.5%Full performance →
Quarter
2025Q42025Q32025Q22025Q12024Q42024Q32024Q22024Q12023Q42023Q32023Q22023Q1
Biggest winner since filing
MUMICRON TECHNOLOGY INC
+210.1%
+$941.1M
Biggest loser since filing
BKNGBOOKING HOLDINGS INC
-96.1%
−$280.3M

Investment strategy

Ken Griffin is a mega-fund. Disclosed equity book is over $100B.

Embed this chart
Paste this iframe anywhere to embed the live NVDA chart.
<iframe src="https://openstocks.me/embed/stocks/NVDA" width="100%" height="480" frameborder="0" loading="lazy" title="NVDA chart by OpenStocks" style="border:0;border-radius:12px;background:transparent"></iframe>
Preview: https://openstocks.me/embed/stocks/NVDA

Holdings

11 sectors
1200 positions
Top 3 = 1% of book · NVDA, AMZN, DIA
View full portfolio →

Performance

vs SPY
40 quarters tracked
Mark-to-market portfolio growth vs SPY benchmark, with AUM and concentration history.
View performance →

Options & derivatives

Bearish bets
6638 option positions
Largest: PUT QQQ ($22.24B notional)
View options →

Activity & trades

Quarter-by-quarter
Last move 2025Q4
ADD KIDZW — and 4 more recent moves.
View activity →

Recent transactions

See full activity →
ADD
Ken Griffin (Citadel Advisors) added to KIDZW
CLASSOVER HLDGS INC
+1,220
~$0.01 · 2025Q4
2026-02-17
SOLD
Ken Griffin (Citadel Advisors) exited IFEB
INNOVATOR ETFS TRUST
−10,623
~$29.38 · 2025Q4
2026-02-17
SOLD
Ken Griffin (Citadel Advisors) exited G7257A113
PROCAP ACQUISITION CORP
−10,561
~$10.59 · 2025Q4
2026-02-17
TRIM
Ken Griffin (Citadel Advisors) trimmed WLDR
TWO RDS SHARED TR
−12,083
~$35.58 · 2025Q4
2026-02-17
NEW
Ken Griffin (Citadel Advisors) opened a new position in INGM
INGRAM MICRO HLDG CORP
+20,604
~$21.34 · 2025Q4
2026-02-17
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