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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
META icon
3551
Meta Platforms (Facebook)
META
$1.48T
– –
-482,499
Closed -$354M
MGK icon
3552
Vanguard Morningstar Mega Cap Growth ETF
MGK
$33.6B
– –
-17,500
Closed -$1.41M
MGRC icon
3553
McGrath RentCorp
MGRC
$2.91B
– –
-9,995
Closed -$1.17M
MHUA
3554
DELISTED
Meihua International Medical Technologies
MHUA
– –
-306
Closed -$11.1K
MIRA icon
3555
MIRA Pharmaceuticals
MIRA
$32.3M
– –
-46,700
Closed -$63.5K
MLKN icon
3556
MillerKnoll
MLKN
$1.6B
– –
-157,083
Closed -$2.79M
MLNK
3557
DELISTED
MeridianLink
MLNK
– –
-449,500
Closed -$8.96M
MMYT icon
3558
MakeMyTrip
MMYT
$5.71B
– –
-50,267
Closed -$4.7M
MOAT icon
3559
VanEck Morningstar Wide Moat ETF
MOAT
$12.3B
– –
-3,800
Closed -$377K
MODD icon
3560
Modular Medical
MODD
$10.8M
– –
-1,563
Closed -$32.8K
MOS icon
3561
The Mosaic Company
MOS
$7.13B
– –
-714,980
Closed -$24.8M
MP icon
3562
MP Materials
MP
$9.57B
– –
-1,404,600
Closed -$94.2M
MPB icon
3563
Mid Penn Bancorp
MPB
$967M
– –
-13,867
Closed -$397K
MPWR icon
3564
Monolithic Power Systems
MPWR
$70.1B
– –
-8,086
Closed -$7.44M
MRC
3565
DELISTED
MRC Global
MRC
– –
-1,448,059
Closed -$20.9M
MRSN
3566
DELISTED
Mersana Therapeutics
MRSN
– –
-88,465
Closed -$686K
MRTN icon
3567
Marten Transport
MRTN
$1.22B
– –
-516,897
Closed -$5.51M
MSGE icon
3568
Madison Square Garden
MSGE
$3.97B
– –
-53,700
Closed -$2.43M
MTRN icon
3569
Materion
MTRN
$5.95B
– –
-11,900
Closed -$1.44M
MTSI icon
3570
MACOM Technology Solutions
MTSI
$24.1B
– –
-131,215
Closed -$16.3M
MUFG icon
3571
Mitsubishi UFJ Financial
MUFG
$257B
– –
-583,228
Closed -$9.3M
MURA
3572
DELISTED
Mural Oncology
MURA
– –
-146,000
Closed -$302K
MVIS icon
3573
Microvision
MVIS
$113M
– –
-6,417
Closed -$119K
MX icon
3574
Magnachip Semiconductor
MX
$141M
– –
-97,900
Closed -$306K
MYO icon
3575
Myomo
MYO
$59M
– –
-712,094
Closed -$635K
141 142
143
144 145

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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.