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 |
iShares Core S&P 500 ETF
IVV
|
+$2.72B |
| 2 |
Meta Platforms (Facebook)
META
|
+$660M |
| 3 |
Micron Technology
MU
|
+$605M |
| 4 |
Mastercard
MA
|
+$497M |
| 5 |
Tesla
TSLA
|
+$495M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$1.33B |
| 2 |
Visa
V
|
+$1.26B |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$1.23B |
| 4 |
Lam Research
LRCX
|
+$699M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$681M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 4.49% |
| 2 | Healthcare | 2.99% |
| 3 | Financials | 2.85% |
| 4 | Industrials | 2.56% |
| 5 | Consumer Discretionary | 2.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
526
CALL
DoorDash
DASH
$92.1B
| $167M | 0.03% |
1,112,200
-31,300
| -3% | -$5.78M |
|
527
Willis Towers Watson
WTW
$31.6B
| $167M | 0.03% |
574,298
+552,964
| +2,592% | +$170M |
|
528
CALL
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27.2B
| $167M | 0.03% |
270,200
-41,500
| -13% | -$26.3M |
|
529
PUT
ARK Innovation ETF
ARKK
$6.44B
| $166M | 0.03% |
2,462,700
-461,200
| -16% | -$34.2M |
|
530
CALL
Blackstone
BX
$110B
| $166M | 0.03% |
1,445,200
-157,300
| -10% | -$20.5M |
|
531
Netflix
NFLX
$309B
| $166M | 0.03% |
1,726,375
-5,135,228
| -75% | -$452M |
|
532
CALL
Amplify Junior Silver Miners ETF
SILJ
$3.99B
| $166M | 0.03% |
5,582,900
+2,825,800
| +102% | +$93.7M |
|
533
CALL
FedEx
FDX
$77.3B
| $165M | 0.03% |
464,100
-126,400
| -21% | -$43.9M |
|
|
EXE
534
Expand Energy Corp
EXE
$22.3B
| $165M | 0.03% |
1,504,699
+48,025
| +3% | +$5.13M |
|
535
Arthur J. Gallagher & Co
AJG
$65.5B
| $165M | 0.03% |
762,692
+138,732
| +22% | +$32M |
|
536
PUT
Arista Networks
ANET
$265B
| $165M | 0.03% |
1,344,800
-862,900
| -39% | -$115M |
|
537
CALL
Regeneron Pharmaceuticals
REGN
$82.2B
| $165M | 0.03% |
213,700
-51,600
| -19% | -$39.5M |
|
538
PUT
Nu Holdings
NU
$65.5B
| $164M | 0.03% |
11,442,100
+1,844,200
| +19% | +$29.9M |
|
539
CALL
Airbnb
ABNB
$108B
| $164M | 0.03% |
1,296,400
-880,400
| -40% | -$114M |
|
540
Fidelity National Information Services
FIS
$21.6B
| $164M | 0.03% |
3,488,971
+3,307,111
| +1,818% | +$178M |
|
541
CrowdStrike
CRWD
$226B
| $164M | 0.03% |
1,676,072
+329,260
| +24% | +$34.9M |
|
542
Protagonist Therapeutics
PTGX
$9.84B
| $164M | 0.03% |
1,551,900
+425,213
| +38% | +$37.6M |
|
543
CALL
Philip Morris
PM
$290B
| $163M | 0.03% |
988,400
+6,600
| +0.7% | +$1.15M |
|
544
CALL
Comfort Systems
FIX
$61.2B
| $163M | 0.03% |
118,500
+89,500
| +309% | +$114M |
|
545
Brinker International
EAT
$10.5B
| $162M | 0.03% |
1,131,514
+295,783
| +35% | +$45.1M |
|
546
CALL
Abbott
ABT
$192B
| $161M | 0.03% |
1,571,800
-886,200
| -36% | -$100M |
|
547
CALL
SLB Ltd
SLB
$78.1B
| $160M | 0.03% |
3,118,600
-4,625,400
| -60% | -$224M |
|
548
argenx
ARGX
$54.8B
| $160M | 0.03% |
219,126
-131,725
| -38% | -$103M |
|
549
CALL
Devon Energy
DVN
$49.3B
| $160M | 0.03% |
3,178,000
+1,045,600
| +49% | +$44.8M |
|
550
Exelon
EXC
$46.6B
| $160M | 0.03% |
3,261,313
+3,036,208
| +1,349% | +$141M |
|
Similar funds
Ken Griffin's Q1 2026 Portfolio in Review
As of Q1 2026, Ken Griffin held 14,860 positions worth $618B, down 7.1% from $666B the previous quarter. Its ten largest holdings account for 22% of the portfolio.
Ken Griffin withdrew a net $19.5B in Q1 2026, closing 2,003 positions and reducing 5,286 holdings. Its most notable exit was CyberArk, an estimated $305M position sold in full.
By sector, the portfolio is most concentrated in Technology at 4.5% of assets, down from 4.9% a quarter earlier, followed by Healthcare and Financials.
Against the trend, Ken Griffin opened a new position in iShares 7-10 Year Treasury Bond ETF worth $327M.
- Ken Griffin's largest Q1 2026 buy was iShares 7-10 Year Treasury Bond ETF: 3,431,225 shares worth $327M.
- Ken Griffin added most to iShares Core S&P 500 ETF in Q1 2026, an estimated $2.72B increase.
- Ken Griffin's biggest Q1 2026 reduction was Amazon, cutting an estimated $1.33B.
- Ken Griffin fully exited CyberArk in Q1 2026, selling an estimated $305M.
- Ken Griffin's ten largest holdings make up 22% of its $618B portfolio in Q1 2026.
- Ken Griffin opened 2,347 new positions and closed 2,003 in Q1 2026.
- Ken Griffin's portfolio value fell 7.1% quarter-over-quarter to $618B.
Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.