Ken Griffin Citadel Advisors
Ken Griffin founded Citadel, one of the world’s largest and most successful hedge funds. Starting his trading career from his Harvard dorm room at a young age, Griffin quickly developed a keen sense for markets and built Citadel into a global powerhouse with billions in assets under management. Known for his quantitative and technology-driven strategies, Griffin has also made headlines for significant philanthropic contributions, supporting causes in education, the arts, and public institutions. Over the years, he has earned recognition as one of the preeminent figures in modern finance.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$2.49B |
| 2 |
NVIDIA
NVDA
|
+$2.19B |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$1.94B |
| 4 |
TSMC
TSM
|
+$728M |
| 5 |
UnitedHealth
UNH
|
+$705M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Meta Platforms (Facebook)
META
|
+$775M |
| 2 |
AbbVie
ABBV
|
+$540M |
| 3 |
Delta Air Lines
DAL
|
+$434M |
| 4 |
Eli Lilly
LLY
|
+$433M |
| 5 |
DexCom
DXCM
|
+$433M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 4.89% |
| 2 | Healthcare | 2.92% |
| 3 | Financials | 2.71% |
| 4 | Consumer Discretionary | 2.52% |
| 5 | Industrials | 2.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2926
PUT
Canadian Solar
CSIQ
$1.03B
| $12.5M | ﹤0.01% |
525,400
+173,800
| +49% | +$3.79M |
|
2927
CALL
Skyworks Solutions
SWKS
$10.5B
| $12.5M | ﹤0.01% |
196,900
-126,800
| -39% | -$8.86M |
|
2928
Thomson Reuters
TRI
$44.9B
| $12.5M | ﹤0.01% |
93,132
-332,419
| -78% | -$48.1M |
|
2929
Encompass Health
EHC
$12.2B
| $12.5M | ﹤0.01% |
117,471
-194,183
| -62% | -$22.5M |
|
2930
PUT
AES
AES
$10.5B
| $12.5M | ﹤0.01% |
869,400
-565,100
| -39% | -$7.97M |
|
2931
CALL
Restaurant Brands International
QSR
$27.1B
| $12.5M | ﹤0.01% |
182,600
-48,200
| -21% | -$3.32M |
|
2932
Workday
WDAY
$49.1B
| $12.5M | ﹤0.01% |
57,996
-219,937
| -79% | -$50M |
|
2933
PUT
Exelon
EXC
$47.2B
| $12.5M | ﹤0.01% |
285,700
-64,400
| -18% | -$2.94M |
|
2934
PUT
Sony
SONY
$142B
| $12.4M | ﹤0.01% |
486,100
+74,600
| +18% | +$2.09M |
|
2935
Kymera Therapeutics
KYMR
$9.76B
| $12.4M | ﹤0.01% |
159,865
+118,042
| +282% | +$7.97M |
|
2936
Trupanion
TRUP
$1.34B
| $12.4M | ﹤0.01% |
332,800
+246,897
| +287% | +$9.7M |
|
2937
Aurinia Pharmaceuticals
AUPH
$2.06B
| $12.4M | ﹤0.01% |
779,495
+76,840
| +11% | +$1.09M |
|
2938
CALL
BioMarin Pharmaceuticals
BMRN
$13B
| $12.4M | ﹤0.01% |
209,000
-3,200
| -2% | -$174K |
|
2939
PUT
ProShares UltraPro Dow 30
UDOW
$924M
| $12.4M | ﹤0.01% |
214,300
+43,700
| +26% | +$2.45M |
|
2940
PUT
Aptiv
APTV
$10.3B
| $12.4M | ﹤0.01% |
163,000
-54,800
| -25% | -$4.4M |
|
|
IMSR
2941
Terrestrial Energy
IMSR
$624M
| $12.4M | ﹤0.01% |
2,029,208
+998,787
| +97% | +$13.4M |
|
|
VTYX
2942
PUT
DELISTED
Ventyx Biosciences
VTYX
| $12.3M | ﹤0.01% |
1,367,000
+1,349,900
| +7,894% | +$10.1M |
|
2943
CALL
Vanguard High Dividend Yield ETF
VYM
$84B
| $12.3M | ﹤0.01% |
86,000
-1,031,400
| -92% | -$147M |
|
2944
PUT
Magnite
MGNI
$3.55B
| $12.3M | ﹤0.01% |
760,200
+271,100
| +55% | +$4.5M |
|
2945
Silicon Motion
SIMO
$9.12B
| $12.3M | ﹤0.01% |
133,056
+60,305
| +83% | +$5.53M |
|
2946
PUT
NexGen Energy
NXE
$6.97B
| $12.3M | ﹤0.01% |
1,338,500
-3,174,500
| -70% | -$28M |
|
2947
PUT
Carpenter Technology
CRS
$27B
| $12.3M | ﹤0.01% |
39,100
-10,400
| -21% | -$3.13M |
|
2948
PUT
Weyerhaeuser
WY
$17.7B
| $12.3M | ﹤0.01% |
519,200
+208,800
| +67% | +$4.83M |
|
2949
DHT Holdings
DHT
$3.15B
| $12.3M | ﹤0.01% |
1,006,243
+766,744
| +320% | +$9.65M |
|
|
CNR
2950
CALL
Core Natural Resources Inc
CNR
$4.76B
| $12.3M | ﹤0.01% |
138,800
-421,644
| -75% | -$35.9M |
|
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Ken Griffin's Q4 2025 Portfolio in Review
As of Q4 2025, Ken Griffin held 14,701 positions worth $666B, up 1.3% from $657B the previous quarter. Its ten largest holdings account for 23% of the portfolio.
Ken Griffin's Q4 2025 filing shows 2,078 new, 5,000 increased, 5,362 reduced and 2,191 closed positions. Its largest new stake was Medline Inc: 6,006,339 shares worth $252M. The largest sale was Meta Platforms (Facebook), an estimated $775M.
By sector, the portfolio is most concentrated in Technology at 4.9% of assets, up from 3.8% a quarter earlier, followed by Healthcare and Financials.
- Ken Griffin's largest Q4 2025 buy was Medline Inc: 6,006,339 shares worth $252M.
- Ken Griffin added most to Amazon in Q4 2025, an estimated $2.49B increase.
- Ken Griffin's biggest Q4 2025 reduction was Meta Platforms (Facebook), cutting an estimated $775M.
- Ken Griffin fully exited WEX in Q4 2025, selling an estimated $131M.
- Ken Griffin's ten largest holdings make up 23% of its $666B portfolio in Q4 2025.
- Ken Griffin opened 2,078 new positions and closed 2,191 in Q4 2025.
- Ken Griffin's portfolio value rose 1.3% quarter-over-quarter to $666B.
Based on Citadel Advisors's 13F filing for Q4 2025, filed 17 Feb 2026.