Jim Simons Renaissance Technologies
Jim Simons is the founder of Renaissance Technologies, one of the most successful quantitative hedge funds in the world. Before his career in finance, he served as a mathematics professor and made significant contributions to differential geometry. Simons applied his analytical expertise to develop sophisticated, algorithm-driven trading strategies, earning consistently high returns for investors.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Costco
COST
|
+$616M |
| 2 |
Netflix
NFLX
|
+$481M |
| 3 |
Micron Technology
MU
|
+$416M |
| 4 |
Tesla
TSLA
|
+$416M |
| 5 |
Procter & Gamble
PG
|
+$322M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$885M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$660M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$463M |
| 4 |
Applovin
APP
|
+$430M |
| 5 |
Meta Platforms (Facebook)
META
|
+$354M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 20.84% |
| 2 | Healthcare | 15.77% |
| 3 | Consumer Discretionary | 13.88% |
| 4 | Industrials | 9.94% |
| 5 | Financials | 8.79% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
DAWN
826
DELISTED
Day One Biopharmaceuticals
DAWN
| $12.2M | 0.02% |
1,305,084
+399,608
| +44% | +$3.34M |
|
827
Great Southern Bancorp
GSBC
$888M
| $12.1M | 0.02% |
196,600
-18,900
| -9% | -$1.14M |
|
828
Camden National
CAC
$996M
| $12.1M | 0.02% |
278,200
-17,900
| -6% | -$722K |
|
829
G. Willi-Food International
WILC
$396M
| $12.1M | 0.02% |
418,752
-11,500
| -3% | -$272K |
|
830
Keros Therapeutics
KROS
$211M
| $12M | 0.02% |
591,686
+436,986
| +282% | +$7.67M |
|
831
Civeo
CVEO
$344M
| $12M | 0.02% |
524,032
-30,400
| -5% | -$675K |
|
832
Aramark
ARMK
$16.1B
| $12M | 0.02% |
324,500
+158,800
| +96% | +$6.05M |
|
833
Cooper-Standard Automotive
CPS
$484M
| $11.9M | 0.02% |
363,405
-66,095
| -15% | -$2.15M |
|
834
The RealReal
REAL
$1.33B
| $11.9M | 0.02% |
755,500
+450,000
| +147% | +$5.88M |
|
835
Snap-on
SNA
$20.9B
| $11.9M | 0.02% |
34,460
-32,340
| -48% | -$11.1M |
|
836
Stantec
STN
$8.44B
| $11.9M | 0.02% |
125,800
-8,300
| -6% | -$855K |
|
837
Green Plains
GPRE
$1.09B
| $11.8M | 0.02% |
1,208,077
+135,148
| +13% | +$1.36M |
|
838
Howard Hughes
HHH
$4.04B
| $11.8M | 0.02% |
148,400
+14,000
| +10% | +$1.16M |
|
839
Quanex
NX
$981M
| $11.7M | 0.02% |
761,908
+28,017
| +4% | +$396K |
|
840
Box
BOX
$4.66B
| $11.7M | 0.02% |
391,313
-902,218
| -70% | -$28.3M |
|
841
Mineralys Therapeutics
MLYS
$2.31B
| $11.7M | 0.02% |
322,100
+274,700
| +580% | +$11M |
|
|
CBL
842
CBL Properties
CBL
$1.78B
| $11.7M | 0.02% |
315,794
-5,400
| -2% | -$176K |
|
843
CF Industries
CF
$17.7B
| $11.7M | 0.02% |
150,889
-342,411
| -69% | -$28.1M |
|
|
GPGI
844
GPGI Inc
GPGI
$3.75B
| $11.6M | 0.02% |
603,280
-271,720
| -31% | -$5.42M |
|
|
HDSN
845
Hudson Technologies
HDSN
$239M
| $11.6M | 0.02% |
1,697,250
-99,600
| -6% | -$785K |
|
846
Erie Indemnity
ERIE
$13.4B
| $11.6M | 0.02% |
40,451
+34,380
| +566% | +$10.3M |
|
847
Tanger
SKT
$4.42B
| $11.5M | 0.02% |
345,172
-255,600
| -43% | -$8.52M |
|
848
Allegro MicroSystems
ALGM
$8.23B
| $11.5M | 0.02% |
+436,200
| New | +$12M |
|
|
CALY
849
Callaway Golf Company
CALY
$2.95B
| $11.5M | 0.02% |
984,000
+916,100
| +1,349% | +$9.66M |
|
850
Kemper
KMPR
$1.59B
| $11.5M | 0.02% |
283,210
+120,900
| +74% | +$5.18M |
|
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Jim Simons's Q4 2025 Portfolio in Review
As of Q4 2025, Jim Simons held 3,923 positions worth $64.5B, down 15% from $75.8B the previous quarter. Its ten largest holdings account for 12% of the portfolio.
Jim Simons withdrew a net $10.1B in Q4 2025, closing 737 positions and reducing 1,682 holdings. Its most notable exit was Meta Platforms (Facebook), an estimated $354M position sold in full.
By sector, the portfolio is most concentrated in Technology at 21% of assets, down from 22% a quarter earlier, followed by Healthcare and Consumer Discretionary.
Against the trend, Jim Simons opened a new position in ServiceNow worth $204M.
- Jim Simons's largest Q4 2025 buy was ServiceNow: 1,331,977 shares worth $204M.
- Jim Simons added most to Costco in Q4 2025, an estimated $616M increase.
- Jim Simons's biggest Q4 2025 reduction was NVIDIA, cutting an estimated $885M.
- Jim Simons fully exited Meta Platforms (Facebook) in Q4 2025, selling an estimated $354M.
- Jim Simons's ten largest holdings make up 12% of its $64.5B portfolio in Q4 2025.
- Jim Simons opened 466 new positions and closed 737 in Q4 2025.
- Jim Simons's portfolio value fell 15% quarter-over-quarter to $64.5B.
Based on Renaissance Technologies's 13F filing for Q4 2025, filed 12 Feb 2026.