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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
+17.5%
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
$75.8B
AUM Growth
+$582M
Cap. Flow
-$5.41B
Cap. Flow %
-7.14%
Top 10 Hldgs %
11.47%
Holding
4,038
New
516
Increased
1,457
Reduced
1,457
Closed
581

Top Buys

Rank Stock Value
1
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$546M
2
MSFT icon
Microsoft
MSFT
+$480M
3
GOOG icon
Alphabet (Google) Class C
GOOG
+$362M
4
META icon
Meta Platforms (Facebook)
META
+$350M
5
KO icon
Coca-Cola
KO
+$266M

Top Sells

Rank Stock Value
1
HOOD icon
Robinhood
HOOD
+$1.04B
2
PLTR icon
Palantir
PLTR
+$800M
3
AAPL icon
Apple
AAPL
+$516M
4
NFLX icon
Netflix
NFLX
+$326M
5
NVDA icon
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
XMMO icon
4001
Invesco S&P MidCap Momentum ETF
XMMO
$7.56B
– –
-4,800
Closed -$617K
XP icon
4002
XP
XP
$8.01B
– –
-90,924
Closed -$1.84M
XRT icon
4003
State Street SPDR S&P Retail ETF
XRT
$645M
– –
-17,000
Closed -$1.31M
XT icon
4004
iShares Future Exponential Technologies ETF
XT
$3.97B
– –
-24,700
Closed -$1.61M
XYLD icon
4005
Global X S&P 500 Covered Call ETF
XYLD
$3.28B
– –
-26,000
Closed -$1.01M
YMAB
4006
DELISTED
Y-mAbs Therapeutics
YMAB
– –
-164,100
Closed -$740K
Z icon
4007
Zillow
Z
$7.68B
– –
-15,914
Closed -$1.11M
ZION icon
4008
Zions Bancorporation
ZION
$10.4B
– –
-25,395
Closed -$1.32M
ZLAB icon
4009
Zai Lab
ZLAB
$2.92B
– –
-232,900
Closed -$8.14M
ZUMZ icon
4010
Zumiez
ZUMZ
$322M
– –
-144,900
Closed -$1.92M
ZWS icon
4011
Zurn Elkay Water Solutions
ZWS
$8.6B
– –
-192,493
Closed -$7.04M
BTSG icon
4012
BrightSpring Health Services
BTSG
$11.5B
– –
-372,700
Closed -$8.79M
SOC icon
4013
Sable Offshore Corp
SOC
$891M
– –
-272,000
Closed -$5.98M
NXTS
4014
Nexentis Technologies
NXTS
$2.75M
– –
-222
Closed -$12.5K
ULS icon
4015
UL Solutions
ULS
$15.6B
– –
-153,392
Closed -$11.2M
SUPX
4016
SuperX AI Technology Ltd
SUPX
$298M
– –
-39,714
Closed -$401K
LOAR icon
4017
Loar Holdings
LOAR
$6.83B
– –
-28,400
Closed -$2.45M
LION icon
4018
Lionsgate Studios
LION
$3.53B
– –
-270,272
Closed -$1.57M
MSTX
4019
Defiance Daily Target 2x Long MSTR ETF
MSTX
$136M
– –
-4,990
Closed -$2.01M
ATYR
4020
aTyr Pharma
ATYR
$52.4M
– –
-518,355
Closed -$2.63M
DSY
4021
Big Tree Cloud Holdings
DSY
$22.6M
– –
-565
Closed -$16.4K
WBTN
4022
WEBTOON Entertainment Inc
WBTN
$1.19B
– –
-29,066
Closed -$264K
SDST
4023
Stardust Power Inc
SDST
$7.51M
– –
-1,399
Closed -$2.76K
OS
4024
DELISTED
OneStream Inc
OS
– –
-9,200
Closed -$260K
ORKT
4025
Orangekloud Technology Inc
ORKT
$5.9M
– –
-2,500
Closed -$5.1K
158 159 160
161
162

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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.