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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
+2.8%
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
$64.5B
AUM Growth
-$11.3B
Cap. Flow
-$10.1B
Cap. Flow %
-15.68%
Top 10 Hldgs %
12.13%
Holding
3,923
New
466
Increased
1,028
Reduced
1,682
Closed
737

Top Buys

Rank Stock Value
1
COST icon
Costco
COST
+$616M
2
NFLX icon
Netflix
NFLX
+$481M
3
MU icon
Micron Technology
MU
+$416M
4
TSLA icon
Tesla
TSLA
+$416M
5
PG icon
Procter & Gamble
PG
+$322M

Top Sells

Rank Stock Value
1
NVDA icon
NVIDIA
NVDA
+$885M
2
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$660M
3
GOOG icon
Alphabet (Google) Class C
GOOG
+$463M
4
APP icon
Applovin
APP
+$430M
5
META icon
Meta Platforms (Facebook)
META
+$354M

Sector Composition

Rank Sector Weight
1 Technology 20.84%
2 Healthcare 15.77%
3 Consumer Discretionary 13.88%
4 Industrials 9.94%
5 Financials 8.79%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
AGM icon
3201
Federal Agricultural Mortgage
AGM
$2.58B
– –
-42,100
Closed -$7.07M
AGO icon
3202
Assured Guaranty
AGO
$3.29B
– –
-62,900
Closed -$5.32M
AI icon
3203
C3.ai
AI
$1.57B
– –
-980,600
Closed -$17M
AIV
3204
Aimco
AIV
$379M
– –
-1,201,640
Closed -$9.53M
AIZ icon
3205
Assurant
AIZ
$13.9B
– –
-61,900
Closed -$13.4M
AKRO
3206
DELISTED
Akero Therapeutics
AKRO
– –
-118,100
Closed -$5.61M
ALE
3207
DELISTED
Allete
ALE
– –
-111,999
Closed -$7.44M
ALRM icon
3208
Alarm.com
ALRM
$2.72B
– –
-24,100
Closed -$1.28M
AMBA icon
3209
Ambarella
AMBA
$3.66B
– –
-242,600
Closed -$20M
AMGN icon
3210
Amgen
AMGN
$225B
– –
-167,245
Closed -$47.2M
AMKR icon
3211
Amkor Technology
AMKR
$13.8B
– –
-343,000
Closed -$9.74M
GOLD
3212
Gold.com Inc
GOLD
$1.3B
– –
-68,500
Closed -$1.77M
AMTX icon
3213
Aemetis
AMTX
$126M
– –
-363,001
Closed -$817K
ANGL icon
3214
VanEck Fallen Angel High Yield Bond ETF
ANGL
$3.11B
– –
-156,700
Closed -$4.66M
APLD icon
3215
Applied Digital
APLD
$8.97B
– –
-3,178,300
Closed -$72.9M
ARE icon
3216
Alexandria Real Estate Equities
ARE
$8.27B
– –
-23,900
Closed -$1.99M
ARIS
3217
DELISTED
Aris Water Solutions
ARIS
– –
-80,800
Closed -$1.99M
ARI
3218
Apollo Commercial Real Estate
ARI
$885M
– –
-32,540
Closed -$330K
ARKK icon
3219
ARK Innovation ETF
ARKK
$6.44B
– –
-26,500
Closed -$2.29M
ARVN icon
3220
Arvinas
ARVN
$580M
– –
-669,655
Closed -$5.71M
ASM
3221
Avino Silver & Gold Mines
ASM
$1.25B
– –
-161,800
Closed -$849K
ASPI icon
3222
ASP Isotopes
ASPI
$541M
– –
-201,200
Closed -$1.94M
ASPN icon
3223
Aspen Aerogels
ASPN
$510M
– –
-246,900
Closed -$1.72M
ASTI icon
3224
Ascent Solar Technologies
ASTI
$33M
– –
-41,818
Closed -$82K
ASTL icon
3225
Algoma Steel
ASTL
$470M
– –
-216,333
Closed -$769K
127 128
129
130 131

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Jim Simons's Q4 2025 Portfolio in Review

As of Q4 2025, Jim Simons held 3,923 positions worth $64.5B, down 15% from $75.8B the previous quarter. Its ten largest holdings account for 12% of the portfolio.

Jim Simons withdrew a net $10.1B in Q4 2025, closing 737 positions and reducing 1,682 holdings. Its most notable exit was Meta Platforms (Facebook), an estimated $354M position sold in full.

By sector, the portfolio is most concentrated in Technology at 21% of assets, down from 22% a quarter earlier, followed by Healthcare and Consumer Discretionary.

Against the trend, Jim Simons opened a new position in ServiceNow worth $204M.

  • Jim Simons's largest Q4 2025 buy was ServiceNow: 1,331,977 shares worth $204M.
  • Jim Simons added most to Costco in Q4 2025, an estimated $616M increase.
  • Jim Simons's biggest Q4 2025 reduction was NVIDIA, cutting an estimated $885M.
  • Jim Simons fully exited Meta Platforms (Facebook) in Q4 2025, selling an estimated $354M.
  • Jim Simons's ten largest holdings make up 12% of its $64.5B portfolio in Q4 2025.
  • Jim Simons opened 466 new positions and closed 737 in Q4 2025.
  • Jim Simons's portfolio value fell 15% quarter-over-quarter to $64.5B.

Based on Renaissance Technologies's 13F filing for Q4 2025, filed 12 Feb 2026.