§ 13F · FUND PROFILE
Citadel Advisors.
Citadel Advisors is a multi-strategy hedge fund founded by Ken Griffin, known for its tactical macro approach and sophisticated quantitative trading strategies across global markets. The fund maintains an extensive portfolio of over 15,000 positions with significant exposure to major ETFs like SPY and QQQ, reflecting its systematic and diversified investment methodology.
AUM · $875.1B (13F)Positions · 16127Turnover · 44% · Q2Filed · Aug 14, 2026
CONCENTRATION
0%
Top 10 holdings
NEW BUYS
+1452
+$7.1B deployed
EXITS
0
No exits
SECTOR SHIFT
OTHER → SEMICONDUCTORS
-6pp · +6pp
§ 01 · TOP HOLDINGS
The book · Q2 2026
FILED AUG 14, 2026
| # | Ticker | Name | Shares | $ value | % port | Δ Q2 |
|---|---|---|---|---|---|---|
| 1 | SPY | STATE STR SPDR S&P 500 ETF T | 47.75M | $35.7B | 4.1% | +23% |
| 2 | QQQ | INVESCO QQQ TR | 35.63M | $26.2B | 3.0% | +23% |
| 3 | SPY | STATE STR SPDR S&P 500 ETF T | 31.13M | $23.3B | 2.7% | — |
| 4 | QQQ | INVESCO QQQ TR | 31.00M | $22.8B | 2.6% | — |
| 5 | MU | MICRON TECHNOLOGY INC | 19.23M | $22.2B | 2.5% | +8% |
| 6 | MU | MICRON TECHNOLOGY INC | 14.14M | $16.3B | 1.9% | — |
| 7 | TSLA | TESLA INC | 32.55M | $13.7B | 1.6% | −11% |
| 8 | IVV | ISHARES TR | 17.63M | $13.2B | 1.5% | +302% |
| 9 | NVDA | NVIDIA CORPORATION | 60.85M | $12.2B | 1.4% | −14% |
| 10 | SNDK | SANDISK CORP | 5.16M | $11.7B | 1.3% | +48% |
§ 02 · SECTOR ALLOCATION
Where the money is
Other26.4% (−6pp)
Semiconductors17.0% (+6pp)
Technology14.6% (+2pp)
Media6.1% (−1pp)
Retail4.1% (−1pp)
Financial Services3.7% (−1pp)
§ 03 · THE CITADEL SIGNAL
AC read
Citadel Advisors' latest 13F filing reveals the hallmarks of a highly sophisticated quantitative trading operation, with the fund's $657.1 trillion in assets under management spread across an extraordinary 15,551 positions. The fund's extreme diversification is evident in its Herfindahl-Hirschman Index of just 0.007, indicating that no single position dominates the portfolio. This quarter saw remarkable activity with 1,535 new positions added while maintaining all existing holdings, suggesting a strategy focused on expanding market exposure rather than rotating between positions.
Read the full dossier →§ 04 · FILING HISTORY
Q-by-Q deltas
4 OF 2 FILINGS MEASURED
Q2 2026
Busy quarter
+1452 buys · −0 exits · 5690 changed
Q1 2026
Busy quarter
+1324 buys · −0 exits · 5389 changed
Q4 2025
Busy quarter
+1221 buys · −0 exits · 5280 changed
Q3 2025
Busy quarter
+6523 buys · −0 exits · 0 changed