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 | |
|---|---|---|---|---|---|---|
1801
First Trust Senior Loan Fund ETF
FTSL
$2.33B
| $2.21M | ﹤0.01% |
48,105
-273,325
| -85% | -$12.5M |
|
1802
Nordic American Tanker
NAT
$1.4B
| $2.21M | ﹤0.01% |
641,407
-415,693
| -39% | -$1.47M |
|
1803
Morgan Stanley Direct Lending Fund
MSDL
$1.31B
| $2.2M | ﹤0.01% |
133,500
-389,288
| -74% | -$6.58M |
|
|
FLOC
1804
Flowco Holdings
FLOC
$1B
| $2.2M | ﹤0.01% |
117,300
-40,100
| -25% | -$669K |
|
1805
Babcock & Wilcox
BW
$1.39B
| $2.19M | ﹤0.01% |
345,500
+295,800
| +595% | +$1.46M |
|
1806
Adtran
ADTN
$665M
| $2.19M | ﹤0.01% |
251,840
-19,794
| -7% | -$172K |
|
1807
Sight Sciences
SGHT
$458M
| $2.19M | ﹤0.01% |
275,900
-99,900
| -27% | -$638K |
|
1808
Jack in the Box
JACK
$358M
| $2.19M | ﹤0.01% |
+115,400
| New | +$2.09M |
|
1809
WSFS Financial
WSFS
$4.15B
| $2.18M | ﹤0.01% |
39,477
-98,071
| -71% | -$5.37M |
|
1810
Fulgent Genetics
FLGT
$515M
| $2.18M | ﹤0.01% |
+82,864
| New | +$2.15M |
|
1811
CryoPort
CYRX
$766M
| $2.17M | ﹤0.01% |
226,040
-163,170
| -42% | -$1.54M |
|
|
ITRG
1812
Integra Resources
ITRG
$550M
| $2.17M | ﹤0.01% |
540,700
-466,380
| -46% | -$1.57M |
|
|
KLC
1813
KinderCare Learning Companies
KLC
$572M
| $2.16M | ﹤0.01% |
500,900
+264,100
| +112% | +$1.33M |
|
1814
Lexeo Therapeutics
LXEO
$407M
| $2.16M | ﹤0.01% |
217,772
+68,472
| +46% | +$625K |
|
1815
Direxion Daily TSLA Bear 1X ETF
TSLS
$73.8M
| $2.16M | ﹤0.01% |
+42,520
| New | +$2.25M |
|
|
TRT
1816
Trio-Tech International
TRT
$118M
| $2.15M | ﹤0.01% |
325,356
-18,670
| -5% | -$78.7K |
|
1817
NMI Holdings
NMIH
$3.38B
| $2.15M | ﹤0.01% |
52,653
-111,600
| -68% | -$4.22M |
|
1818
CF Bankshares
CFBK
$235M
| $2.15M | ﹤0.01% |
86,079
+30,400
| +55% | +$726K |
|
1819
Microvast
MVST
$341M
| $2.14M | ﹤0.01% |
+763,768
| New | +$3.19M |
|
|
JCAP
1820
Jefferson Capital
JCAP
$1.33B
| $2.14M | ﹤0.01% |
95,600
+31,600
| +49% | +$638K |
|
|
BLSH
1821
Bullish
BLSH
$4.17B
| $2.13M | ﹤0.01% |
+56,333
| New | +$2.74M |
|
1822
Westwater Resources
WWR
$75.2M
| $2.13M | ﹤0.01% |
2,836,890
+1,783,833
| +169% | +$2.21M |
|
|
CMDB
1823
Costamare Bulkers Holdings
CMDB
$429M
| $2.13M | ﹤0.01% |
138,049
-14,797
| -10% | -$214K |
|
1824
The GEO Group
GEO
$4B
| $2.12M | ﹤0.01% |
131,691
+113,000
| +605% | +$1.88M |
|
|
ONIT
1825
Onity Group
ONIT
$321M
| $2.12M | ﹤0.01% |
46,236
-17,827
| -28% | -$732K |
|
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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.