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 | |
|---|---|---|---|---|---|---|
1001
RCM Technologies
RCMT
$202M
| $8.58M | 0.01% |
419,573
-20,000
| -5% | -$429K |
|
1002
Toll Brothers
TOL
$13.9B
| $8.57M | 0.01% |
+63,400
| New | +$8.61M |
|
1003
Atlanticus Holdings
ATLC
$1.48B
| $8.57M | 0.01% |
127,958
-16,902
| -12% | -$994K |
|
1004
Lincoln Educational Services
LINC
$945M
| $8.55M | 0.01% |
353,878
-169,800
| -32% | -$3.7M |
|
1005
Ducommun
DCO
$3.04B
| $8.53M | 0.01% |
89,700
-56,382
| -39% | -$5.25M |
|
|
MRX
1006
Marex Group Limited Ordinary Shares
MRX
$5.12B
| $8.47M | 0.01% |
220,787
-294,100
| -57% | -$10M |
|
1007
Financial Institutions
FISI
$825M
| $8.46M | 0.01% |
271,300
-40,192
| -13% | -$1.18M |
|
1008
Ultragenyx Pharmaceutical
RARE
$2.65B
| $8.42M | 0.01% |
366,100
+344,200
| +1,572% | +$11.3M |
|
1009
AMERISAFE
AMSF
$517M
| $8.41M | 0.01% |
219,000
-1,500
| -0.7% | -$60.5K |
|
1010
Zurn Elkay Water Solutions
ZWS
$8.46B
| $8.4M | 0.01% |
+180,693
| New | +$8.48M |
|
1011
HSBC
HSBC
$358B
| $8.39M | 0.01% |
106,622
-384,300
| -78% | -$27.5M |
|
1012
Avista
AVA
$3.23B
| $8.35M | 0.01% |
216,715
+203,315
| +1,517% | +$7.94M |
|
1013
Sonos
SONO
$1.86B
| $8.35M | 0.01% |
475,601
-371,799
| -44% | -$6.48M |
|
|
FISV
1014
Fiserv Inc
FISV
$29.5B
| $8.35M | 0.01% |
124,327
-839,100
| -87% | -$70.2M |
|
1015
Medifast
MED
$130M
| $8.34M | 0.01% |
780,610
-20,300
| -3% | -$243K |
|
1016
Bentley Systems
BSY
$10.8B
| $8.28M | 0.01% |
216,900
-291,100
| -57% | -$13.3M |
|
1017
Douglas Elliman
DOUG
$184M
| $8.28M | 0.01% |
3,492,404
-233,200
| -6% | -$600K |
|
1018
Gorman-Rupp
GRC
$2.15B
| $8.24M | 0.01% |
172,615
-3,200
| -2% | -$149K |
|
1019
TriMas Corp
TRS
$1.41B
| $8.22M | 0.01% |
231,900
-34,000
| -13% | -$1.19M |
|
1020
Grayscale Bitcoin Trust
GBTC
$9.51B
| $8.21M | 0.01% |
120,100
+87,900
| +273% | +$6.89M |
|
1021
AbCellera Biologics
ABCL
$3.36B
| $8.17M | 0.01% |
2,389,229
-971,500
| -29% | -$4.34M |
|
1022
Knife River
KNF
$3.83B
| $8.17M | 0.01% |
+116,100
| New | +$8.15M |
|
1023
Chipotle Mexican Grill
CMG
$41.3B
| $8.16M | 0.01% |
+220,500
| New | +$7.98M |
|
1024
Selective Insurance
SIGI
$5.59B
| $8.14M | 0.01% |
97,294
-104,200
| -52% | -$8.36M |
|
1025
Aveanna Healthcare
AVAH
$2.46B
| $8.13M | 0.01% |
994,516
+181,816
| +22% | +$1.64M |
|
Similar funds
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.