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 | |
|---|---|---|---|---|---|---|
2026
Transact Technologies
TACT
$53.2M
| $2.16M | ﹤0.01% |
399,315
+113,578
| +40% | +$480K |
|
2027
Twin Disc
TWIN
$354M
| $2.16M | ﹤0.01% |
154,993
-3,715
| -2% | -$40.2K |
|
2028
Carter's
CRI
$1.42B
| $2.16M | ﹤0.01% |
76,500
-155,200
| -67% | -$4.45M |
|
2029
Vanguard Morningstar Mid-Cap Growth ETF
VOT
$20.3B
| $2.14M | ﹤0.01% |
7,300
-2,900
| -28% | -$837K |
|
2030
iShares Russell Mid-Cap ETF
IWR
$58.4B
| $2.14M | ﹤0.01% |
22,200
-500
| -2% | -$47.4K |
|
|
SHCO
2031
DELISTED
Soho House & Co
SHCO
| $2.14M | ﹤0.01% |
+241,600
| New | +$1.9M |
|
2032
Mayville Engineering Co
MEC
$614M
| $2.13M | ﹤0.01% |
155,000
+11,000
| +8% | +$165K |
|
2033
Taylor Devices
TAYD
$178M
| $2.13M | ﹤0.01% |
43,462
-3,000
| -6% | -$139K |
|
2034
Schneider National
SNDR
$6.33B
| $2.13M | ﹤0.01% |
+100,600
| New | +$2.46M |
|
2035
Neumora Therapeutics
NMRA
$296M
| $2.12M | ﹤0.01% |
1,163,976
-270,551
| -19% | -$437K |
|
|
DFUS
2036
Dimensional US Equity ETF
DFUS
$21.7B
| $2.12M | ﹤0.01% |
29,200
+24,500
| +521% | +$1.71M |
|
2037
Valens Semiconductor
VLN
$210M
| $2.11M | ﹤0.01% |
1,180,515
+278,285
| +31% | +$629K |
|
|
KBDC
2038
Kayne Anderson BDC
KBDC
$892M
| $2.11M | ﹤0.01% |
158,559
-135,941
| -46% | -$2.06M |
|
2039
Ecovyst
ECVT
$1.14B
| $2.11M | ﹤0.01% |
240,700
-7,900
| -3% | -$69.6K |
|
2040
One Stop Systems
OSS
$339M
| $2.11M | ﹤0.01% |
393,160
+291,300
| +286% | +$1.59M |
|
|
GBIO
2041
DELISTED
Generation Bio
GBIO
| $2.11M | ﹤0.01% |
344,263
+86,185
| +33% | +$446K |
|
|
FSFG
2042
DELISTED
First Savings Financial Group
FSFG
| $2.09M | ﹤0.01% |
66,600
-4,452
| -6% | -$120K |
|
2043
C4 Therapeutics
CCCC
$522M
| $2.08M | ﹤0.01% |
936,950
-156,238
| -14% | -$375K |
|
2044
Enpro
NPO
$7.27B
| $2.08M | ﹤0.01% |
9,200
-5,400
| -37% | -$1.17M |
|
2045
New Jersey Resources
NJR
$5.64B
| $2.08M | ﹤0.01% |
43,100
-271,100
| -86% | -$12.6M |
|
2046
China Automotive Systems
CAAS
$142M
| $2.07M | ﹤0.01% |
439,187
+36,393
| +9% | +$157K |
|
2047
Compugen
CGEN
$228M
| $2.07M | ﹤0.01% |
1,405,335
+78,235
| +6% | +$116K |
|
2048
iShares Expanded Tech Sector ETF
IGM
$10.9B
| $2.07M | ﹤0.01% |
16,400
+11,800
| +257% | +$1.39M |
|
2049
Design Therapeutics
DSGN
$928M
| $2.07M | ﹤0.01% |
274,300
+6,500
| +2% | +$32.6K |
|
2050
JPMorgan BetaBuilders US Equity ETF
BBUS
$9.26B
| $2.06M | ﹤0.01% |
17,100
+10,700
| +167% | +$1.24M |
|
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.