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Jim Simons

Jim Simons Renaissance Technologies

AUM $63.9B
1-Year Est. Return 45.56%
 

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.

This Fund
S&P 500
This Quarter Est. Return
+16.99%
1 Year Est. Return
+45.56%
3 Year Est. Return
+129.95%
5 Year Est. Return
+153.6%
10 Year Est. Return
+738.31%
AUM
$75.2B
AUM Growth
+$9.1B
Cap. Flow
+$1.81B
Cap. Flow %
2.4%
Top 10 Hldgs %
12.06%
Holding
4,018
New
612
Increased
1,577
Reduced
1,314
Closed
496

Top Buys

Rank Stock Value
1
NVDA icon
NVIDIA
NVDA
+$798M
2
NFLX icon
Netflix
NFLX
+$608M
3
UNH icon
UnitedHealth
UNH
+$517M
4
AAPL icon
Apple
AAPL
+$461M
5
GEV icon
GE Vernova
GEV
+$296M

Top Sells

Rank Stock Value
1
AVGO icon
Broadcom
AVGO
+$527M
2
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$372M
3
META icon
Meta Platforms (Facebook)
META
+$362M
4
AMD icon
Advanced Micro Devices
AMD
+$328M
5
PLTR icon
Palantir
PLTR
+$327M

Sector Composition

Rank Sector Weight
1 Technology 19.57%
2 Healthcare 15.8%
3 Consumer Discretionary 12.38%
4 Financials 11.53%
5 Industrials 8.92%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
TE
3976
T1 Energy
TE
$1.53B
– –
-27,500
Closed -$34.6K
ETHU
3977
2x Ether ETF
ETHU
$713M
– –
-9,990
Closed -$367K
ETHT
3978
ProShares Ultra Ether ETF
ETHT
$181M
– –
-14,680
Closed -$373K
SW
3979
Smurfit Westrock
SW
$26B
– –
-102,162
Closed -$4.6M
FETH
3980
Fidelity Ethereum Fund
FETH
$1.01B
– –
-11,400
Closed -$208K
SMC
3981
Summit Midstream
SMC
$479M
– –
-20,400
Closed -$691K
SEI
3982
Solaris Energy Infrastructure
SEI
$3.87B
– –
-36,800
Closed -$801K
AMTM
3983
Amentum Holdings
AMTM
$5.48B
– –
-31,400
Closed -$571K
CURB
3984
Curbline Properties
CURB
$3.4B
– –
-75,417
Closed -$1.82M
CBNA
3985
Chain Bridge Bancorp
CBNA
$316M
– –
-11,300
Closed -$269K
DMN
3986
DELISTED
Damon Inc. Common Stock
DMN
– –
-273,050
Closed -$3.77K
PONY
3987
Pony AI Inc
PONY
$3.68B
– –
-58,000
Closed -$512K
TBCH
3988
Turtle Beach Corp
TBCH
$231M
– –
-68,100
Closed -$972K
DGXX
3989
Digi Power X Inc
DGXX
$373M
– –
-90,500
Closed -$103K
LGF.B
3990
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
– –
-124,300
Closed -$984K
WMPN
3991
DELISTED
William Penn Bancorporation Common Stock
WMPN
– –
-22,300
Closed -$244K
BERY
3992
DELISTED
Berry Global Group, Inc.
BERY
– –
-115,037
Closed -$8.03M
SPRB
3993
Spruce Biosciences
SPRB
$128M
– –
-5,105
Closed -$111K
MKFG
3994
DELISTED
Markforged Holding Corporation
MKFG
– –
-47,939
Closed -$224K
ENFN
3995
DELISTED
Enfusion, Inc.
ENFN
– –
-334,978
Closed -$3.74M
FFNW
3996
DELISTED
First Financial Northwest, Inc
FFNW
– –
-480,101
Closed -$10.9M
EQC
3997
DELISTED
Equity Commonwealth
EQC
– –
-398,200
Closed -$641K
CMRX
3998
DELISTED
Chimerix, Inc.
CMRX
– –
-689,249
Closed -$5.87M
ENZ
3999
DELISTED
Enzo Biochem, Inc.
ENZ
– –
-2,082,229
Closed -$770K
ATSG
4000
DELISTED
Air Transport Services Group
ATSG
– –
-90,200
Closed -$2.02M
157 158 159
160
161

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Jim Simons's Q2 2025 Portfolio in Review

As of Q2 2025, Jim Simons held 4,018 positions worth $75.2B, up 14% from $66.1B the previous quarter. Its ten largest holdings account for 12% of the portfolio.

Jim Simons's Q2 2025 filing shows 612 new, 1,577 increased, 1,314 reduced and 496 closed positions. Its largest new stake was UnitedHealth: 1,352,129 shares worth $422M. The largest sale was Broadcom, an estimated $527M.

By sector, the portfolio is most concentrated in Technology at 20% of assets, up from 17% a quarter earlier, followed by Healthcare and Consumer Discretionary.

  • Jim Simons's largest Q2 2025 buy was UnitedHealth: 1,352,129 shares worth $422M.
  • Jim Simons added most to NVIDIA in Q2 2025, an estimated $798M increase.
  • Jim Simons's biggest Q2 2025 reduction was Broadcom, cutting an estimated $527M.
  • Jim Simons fully exited Advanced Micro Devices in Q2 2025, selling an estimated $328M.
  • Jim Simons's ten largest holdings make up 12% of its $75.2B portfolio in Q2 2025.
  • Jim Simons opened 612 new positions and closed 496 in Q2 2025.
  • Jim Simons's portfolio value rose 14% quarter-over-quarter to $75.2B.

Based on Renaissance Technologies's 13F filing for Q2 2025, filed 13 Aug 2025.