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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
IDEV icon
3676
iShares Core MSCI International Developed Markets ETF
IDEV
$32.7B
– –
-7,800
Closed -$593K
IDR icon
3677
Idaho Strategic Resources
IDR
$557M
– –
-53,500
Closed -$700K
IFBD icon
3678
Infobird
IFBD
$9.01M
– –
-10,100
Closed -$11.4K
IGF icon
3679
iShares Global Infrastructure ETF
IGF
$10.7B
– –
-64,900
Closed -$3.84M
IGMS
3680
DELISTED
IGM Biosciences
IGMS
– –
-117,734
Closed -$132K
BRSL
3681
Brightstar Lottery PLC
BRSL
$2.04B
– –
-37,500
Closed -$593K
IIIV icon
3682
i3 Verticals
IIIV
$323M
– –
-12,000
Closed -$330K
IIPR icon
3683
Innovative Industrial Properties
IIPR
$1.69B
– –
-4,400
Closed -$243K
IJJ icon
3684
iShares S&P Mid-Cap 400 Value ETF
IJJ
$8.98B
– –
-7,800
Closed -$964K
IJK icon
3685
iShares S&P Mid-Cap 400 Growth ETF
IJK
$11.2B
– –
-2,300
Closed -$209K
IJT icon
3686
iShares S&P Small-Cap 600 Growth ETF
IJT
$8.39B
– –
-5,900
Closed -$785K
IMCG icon
3687
iShares Morningstar Mid-Cap Growth ETF
IMCG
$4.15B
– –
-3,800
Closed -$305K
IMNN icon
3688
Imunon
IMNN
$6.81M
– –
-48,913
Closed -$510K
IMO icon
3689
Imperial Oil
IMO
$62.7B
– –
-29,195
Closed -$2.32M
IMVT icon
3690
Immunovant
IMVT
$8.65B
– –
-241,400
Closed -$3.86M
IMXI icon
3691
International Money Express
IMXI
$344M
– –
-125,800
Closed -$1.27M
INBS icon
3692
Intelligent Bio Solutions
INBS
$5.09M
– –
-1,090
Closed -$18.7K
INZY
3693
DELISTED
Inozyme Pharma
INZY
– –
-470,500
Closed -$1.88M
IOT icon
3694
Samsara
IOT
$22.9B
– –
-931,162
Closed -$37M
IOVA icon
3695
Iovance Biotherapeutics
IOVA
$2.97B
– –
-4,887,200
Closed -$8.41M
IQV icon
3696
IQVIA
IQV
$39.7B
– –
-103,047
Closed -$16.2M
ITOS
3697
DELISTED
iTeos Therapeutics
ITOS
– –
-602,100
Closed -$6M
IVE icon
3698
iShares S&P 500 Value ETF
IVE
$49.9B
– –
-4,100
Closed -$801K
IVOO icon
3699
Vanguard S&P Mid-Cap 400 ETF
IVOO
$3.92B
– –
-7,600
Closed -$798K
IVV icon
3700
iShares Core S&P 500 ETF
IVV
$904B
– –
-1,200
Closed -$745K
146 147
148
149 150

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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.