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Ken Griffin
Citadel Advisors
Founder of Citadel, a multi-strategy fund running quantitative and fundamental books across thousands of positions.
Citadel Advisors reported 6281 positions worth $171.76B in U.S.-listed equities as of Q2 2026. It opened 226 new positions that quarter. It exited 271 positions. The largest holding is iShares Core S&P 500 ETF (IVV), at 7.7% of the portfolio. The biggest new position was Space Exploration Techn Corp (SPCX), at $876.49M. The ten largest holdings account for 16% of the total.
Photo: Paul Elledge / Wikimedia Commons (CC BY-SA 4.0)
- Portfolio value
- $171.76B
- Positions
- 6,281
- Dividends (est.)
- $1.85B
- Estimated over 4 quarters, to Q2 2026
Positions as of Q2 2026, per the 13F filed on Sep 2, 2026. Current positions may differ.
What changed last quarter
Positions opened, added to, trimmed or closed in the Q2 2026 filing.
- $70.04B
- $57.89B
- $12.15B
- Put money into stocks
A 13F does not report cash. It covers only U.S.-listed securities — cash, bonds, foreign stocks and private holdings are invisible in it, which is why Berkshire’s cash pile appears in its 10-Q and not here. What the filing does show is direction: selling more than buying means money left U.S. equities that quarter. Where it went — cash, fixed income, other markets — the form does not say.
Composition
Positions (6,281)
Showing the 250 largest, which add up to 60.6% of the portfolio.
Estimated across every position in each quarter, so a single stock can be compared against the whole. Same caveat as elsewhere: a 13F reports the share count on the last day of the quarter, while dividends are paid throughout it.
Analysis
Articles on this site that cover Ken Griffin.
- Costco (COST): $303 billion of revenue on a 3.9% operating margin, 84 million paying members and five special dividendsPublished Oct 23, 2026
- Linde vs. Air Products: the same gases, a 26% margin against two years of hydrogen write-downsPublished Oct 21, 2026
- Palantir (PLTR): $4.5 billion of revenue, U.S. commercial sales up 149%, founders’ voting control and a P/E of 165Published Oct 20, 2026
- Reddit (RDDT): revenue up 61%, its first profitable year, a stock down 23% and executives selling $259 millionPublished Oct 20, 2026
- AbbVie (ABBV): $61 billion of sales, Skyrizi and Rinvoq after Humira, and a P/E of 81 or 26Published Oct 18, 2026
- Borr Drilling (BORR): 29 jack-up rigs, a $270 million first-half loss and a founder buying $67 million of stockPublished Oct 17, 2026
- Charles Schwab vs. Interactive Brokers: four times the revenue against a 78% pretax marginPublished Oct 15, 2026