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Jim Simons

Jim Simons Renaissance Technologies

AUM $72.6B
1-Year Est. Return 54.88%
 

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
+54.88%
3 Year Est. Return
+169.34%
5 Year Est. Return
+186.18%
10 Year Est. Return
+887.93%
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
ACHV icon
3526
Achieve Life Sciences
ACHV
$744M
– –
-87,886
Closed -$235K
ACLX
3527
DELISTED
Arcellx
ACLX
– –
-68,000
Closed -$4.46M
ADM icon
3528
Archer Daniels Midland
ADM
$38.6B
– –
-265,900
Closed -$12.8M
AFRM icon
3529
Affirm
AFRM
$26.2B
– –
-818,900
Closed -$37M
AGYS icon
3530
Agilysys
AGYS
$3.25B
– –
-14,200
Closed -$1.03M
AIG icon
3531
American International
AIG
$39.8B
– –
-92,700
Closed -$8.06M
AIR icon
3532
AAR Corp
AIR
$5.77B
– –
-38,260
Closed -$2.14M
ALLK
3533
DELISTED
Allakos
ALLK
– –
-869,311
Closed -$198K
AMAT icon
3534
Applied Materials
AMAT
$424B
– –
-112,348
Closed -$16.3M
AMD icon
3535
Advanced Micro Devices
AMD
$789B
– –
-3,195,790
Closed -$328M
AMZN icon
3536
Amazon
AMZN
$2.86T
– –
-2,246
Closed -$427K
ANVS icon
3537
Annovis Bio
ANVS
$76.1M
– –
-21,800
Closed -$32.7K
AON icon
3538
Aon
AON
$75.7B
– –
-35,101
Closed -$14M
ARES icon
3539
Ares Management
ARES
$33.7B
– –
-203,700
Closed -$29.9M
ARI
3540
Apollo Commercial Real Estate
ARI
$886M
– –
-326,340
Closed -$3.12M
ARKF icon
3541
ARK Blockchain & Fintech Innovation ETF
ARKF
$782M
– –
-16,400
Closed -$545K
ARKK icon
3542
ARK Innovation ETF
ARKK
$6.54B
– –
-94,900
Closed -$4.52M
ARKW icon
3543
ARK Web x.0 ETF
ARKW
$1.82B
– –
-6,300
Closed -$596K
ARQT icon
3544
Arcutis Biotherapeutics
ARQT
$3.25B
– –
-21,799
Closed -$341K
ASML icon
3545
ASML
ASML
$710B
– –
-485
Closed -$325K
AVNT icon
3546
Avient
AVNT
$4.23B
– –
-21,358
Closed -$794K
JBIO
3547
Jade Biosciences
JBIO
$1.51B
– –
-1,543
Closed -$136K
AVXL icon
3548
Anavex Life Sciences
AVXL
$303M
– –
-14,000
Closed -$120K
AXDX
3549
DELISTED
Accelerate Diagnostics
AXDX
– –
-64,200
Closed -$45K
AZTA icon
3550
Azenta
AZTA
$1.49B
– –
-16,344
Closed -$566K
140 141
142
143 144

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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.