Jim Simons Renaissance Technologies
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.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Costco
COST
|
+$616M |
| 2 |
Netflix
NFLX
|
+$481M |
| 3 |
Micron Technology
MU
|
+$416M |
| 4 |
Tesla
TSLA
|
+$416M |
| 5 |
Procter & Gamble
PG
|
+$322M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$885M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$660M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$463M |
| 4 |
Applovin
APP
|
+$430M |
| 5 |
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 | |
|---|---|---|---|---|---|---|
1576
Cabaletta Bio
CABA
$435M
| $3.33M | 0.01% |
1,522,583
+183,160
| +14% | +$454K |
|
1577
First Trust Rising Dividend Achievers ETF
RDVY
$25.7B
| $3.31M | 0.01% |
47,700
-12,600
| -21% | -$856K |
|
1578
Pennant Group
PNTG
$1.36B
| $3.31M | 0.01% |
117,700
-66,000
| -36% | -$1.76M |
|
1579
American States Water
AWR
$3.52B
| $3.31M | 0.01% |
45,700
-71,700
| -61% | -$5.28M |
|
1580
iHeartMedia
IHRT
$460M
| $3.3M | 0.01% |
793,329
+130,229
| +20% | +$487K |
|
1581
Yext
YEXT
$596M
| $3.3M | 0.01% |
409,200
-433,900
| -51% | -$3.66M |
|
1582
Seneca Foods Class A
SENEA
$1.28B
| $3.3M | 0.01% |
29,797
-4,100
| -12% | -$469K |
|
1583
iShares MSCI Chile ETF
ECH
$1.04B
| $3.29M | 0.01% |
+81,536
| New | +$2.96M |
|
1584
El Pollo Loco
LOCO
$471M
| $3.29M | 0.01% |
314,600
-40,400
| -11% | -$418K |
|
1585
Mastercard
MA
$499B
| $3.29M | 0.01% |
5,757
-58,287
| -91% | -$32.6M |
|
|
OPRA
1586
Opera Ltd
OPRA
$1.78B
| $3.28M | 0.01% |
231,801
+121,301
| +110% | +$1.79M |
|
1587
Acuity Brands
AYI
$10.6B
| $3.28M | 0.01% |
9,100
-39,900
| -81% | -$14.4M |
|
1588
Viemed Healthcare
VMD
$352M
| $3.28M | 0.01% |
440,800
-6,200
| -1% | -$42.5K |
|
1589
Boyd Gaming
BYD
$6.09B
| $3.27M | 0.01% |
38,400
-17,100
| -31% | -$1.41M |
|
1590
Provident Financial Services
PFS
$3.22B
| $3.26M | 0.01% |
165,269
-153,600
| -48% | -$2.97M |
|
1591
Domo
DOMO
$185M
| $3.26M | 0.01% |
386,980
+178,900
| +86% | +$2.1M |
|
1592
Byline Bancorp
BY
$1.78B
| $3.25M | 0.01% |
111,600
+24,900
| +29% | +$700K |
|
|
RNAM
1593
DELISTED
Avidity Biosciences
RNAM
| $3.25M | 0.01% |
+45,100
| New | +$2.91M |
|
|
ACB
1594
Aurora Cannabis
ACB
$225M
| $3.25M | 0.01% |
770,244
-15,811
| -2% | -$77.3K |
|
1595
Vitesse Energy
VTS
$685M
| $3.25M | 0.01% |
168,500
+143,900
| +585% | +$3.07M |
|
1596
iShares MSCI ACWI ETF
ACWI
$33.5B
| $3.23M | 0.01% |
22,800
-4,000
| -15% | -$561K |
|
1597
Gran Tierra Energy
GTE
$331M
| $3.22M | 0.01% |
760,380
-39,500
| -5% | -$167K |
|
1598
M-tron Industries
MPTI
$374M
| $3.22M | 0.01% |
60,559
+15,454
| +34% | +$816K |
|
1599
Celldex Therapeutics
CLDX
$3.22B
| $3.22M | 0.01% |
118,488
-76,100
| -39% | -$2M |
|
1600
Cass Information Systems
CASS
$749M
| $3.22M | 0.01% |
77,460
+28,200
| +57% | +$1.15M |
|
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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.