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 |
Alphabet (Google) Class A
GOOGL
|
+$546M |
| 2 |
Microsoft
MSFT
|
+$480M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$362M |
| 4 |
Meta Platforms (Facebook)
META
|
+$350M |
| 5 |
Coca-Cola
KO
|
+$266M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Robinhood
HOOD
|
+$1.04B |
| 2 |
Palantir
PLTR
|
+$800M |
| 3 |
Apple
AAPL
|
+$516M |
| 4 |
Netflix
NFLX
|
+$326M |
| 5 |
NVIDIA
NVDA
|
+$313M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 21.71% |
| 2 | Healthcare | 15.16% |
| 3 | Consumer Discretionary | 11.81% |
| 4 | Communication Services | 10.53% |
| 5 | Financials | 9.27% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2851
ProShares Ultra Bitcoin ETF
BITU
$341M
| $443K | ﹤0.01% |
8,300
-800
| -9% | -$44.7K |
|
|
ZH
2852
Zhihu
ZH
$272M
| $437K | ﹤0.01% |
86,288
| – | – |
|
2853
Good Times Restaurants
GTIM
$15.8M
| $437K | ﹤0.01% |
268,283
+21,300
| +9% | +$34.3K |
|
|
CMBM
2854
DELISTED
Cambium Networks
CMBM
| $436K | ﹤0.01% |
487,992
+201,565
| +70% | +$154K |
|
2855
Lantern Pharma
LTRN
$33.6M
| $435K | ﹤0.01% |
100,100
+9,500
| +10% | +$39.7K |
|
|
GRDX
2856
GridAI Technologies Corp
GRDX
$26.8M
| $432K | ﹤0.01% |
86,400
+82,233
| +1,973% | +$191K |
|
2857
Tenax Therapeutics
TENX
$68.5M
| $431K | ﹤0.01% |
+56,600
| New | +$346K |
|
|
KG
2858
Kestrel Group
KG
$66.3M
| $430K | ﹤0.01% |
15,748
-1,900
| -11% | -$50.3K |
|
|
SION
2859
Sionna Therapeutics
SION
$296M
| $429K | ﹤0.01% |
14,600
-11,400
| -44% | -$248K |
|
2860
Nortech Systems
NSYS
$42.5M
| $427K | ﹤0.01% |
47,299
-500
| -1% | -$4.45K |
|
2861
SkinHealth Systems
SKIN
$85.9M
| $427K | ﹤0.01% |
214,491
+128,900
| +151% | +$262K |
|
2862
DocGo
DCGO
$64.5M
| $425K | ﹤0.01% |
312,135
+40,607
| +15% | +$61.5K |
|
2863
Karyopharm Therapeutics
KPTI
$45.1M
| $423K | ﹤0.01% |
64,714
-1,100
| -2% | -$5.92K |
|
2864
NRX Pharmaceuticals
NRXP
$143M
| $423K | ﹤0.01% |
+128,175
| New | +$367K |
|
2865
Direxion Daily Energy Bull 2X ETF
ERX
$244M
| $423K | ﹤0.01% |
+7,500
| New | +$407K |
|
2866
Core Laboratories
CLB
$571M
| $422K | ﹤0.01% |
+34,181
| New | +$401K |
|
2867
John Hancock Multifactor Mid Cap ETF
JHMM
$6.18B
| $420K | ﹤0.01% |
6,500
-14,100
| -68% | -$891K |
|
|
CLPR
2868
Clipper Realty
CLPR
$53M
| $420K | ﹤0.01% |
110,457
-4,600
| -4% | -$18.3K |
|
|
IRBT
2869
DELISTED
iRobot
IRBT
| $419K | ﹤0.01% |
116,676
-461,912
| -80% | -$1.79M |
|
2870
Mativ Holdings
MATV
$690M
| $417K | ﹤0.01% |
+36,900
| New | +$366K |
|
2871
Deutsche Bank
DB
$72.1B
| $410K | ﹤0.01% |
11,664
+1,902
| +19% | +$64.8K |
|
|
JKS
2872
JinkoSolar
JKS
$860M
| $409K | ﹤0.01% |
+17,000
| New | +$401K |
|
2873
Perimeter Solutions
PRM
$5.53B
| $407K | ﹤0.01% |
18,200
-60,800
| -77% | -$1.15M |
|
2874
SIFCO Industries
SIF
$124M
| $407K | ﹤0.01% |
57,834
+16,900
| +41% | +$101K |
|
2875
Brilliant Earth
BRLT
$23M
| $406K | ﹤0.01% |
196,100
+61,500
| +46% | +$124K |
|
Similar funds
Jim Simons's Q3 2025 Portfolio in Review
As of Q3 2025, Jim Simons held 4,038 positions worth $75.8B, up 0.77% from $75.2B the previous quarter. Its ten largest holdings account for 11% of the portfolio.
Jim Simons withdrew a net $5.41B in Q3 2025, closing 581 positions and reducing 1,457 holdings. Its most notable exit was GE Aerospace, an estimated $235M position sold in full.
By sector, the portfolio is most concentrated in Technology at 22% of assets, up from 20% a quarter earlier, followed by Healthcare and Consumer Discretionary.
Against the trend, Jim Simons opened a new position in Alphabet (Google) Class C worth $419M.
- Jim Simons's largest Q3 2025 buy was Alphabet (Google) Class C: 1,720,002 shares worth $419M.
- Jim Simons added most to Alphabet (Google) Class A in Q3 2025, an estimated $546M increase.
- Jim Simons's biggest Q3 2025 reduction was Robinhood, cutting an estimated $1.04B.
- Jim Simons fully exited GE Aerospace in Q3 2025, selling an estimated $235M.
- Jim Simons's ten largest holdings make up 11% of its $75.8B portfolio in Q3 2025.
- Jim Simons opened 516 new positions and closed 581 in Q3 2025.
- Jim Simons's portfolio value rose 0.77% quarter-over-quarter to $75.8B.
Based on Renaissance Technologies's 13F filing for Q3 2025, filed 13 Nov 2025.