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 | |
|---|---|---|---|---|---|---|
351
Ituran Location and Control
ITRN
$1.11B
| $40M | 0.06% |
931,100
-45,600
| -5% | -$1.79M |
|
352
Qorvo
QRVO
$8.52B
| $40M | 0.06% |
473,106
-7,400
| -2% | -$653K |
|
353
Loews
L
$23.2B
| $39.9M | 0.06% |
378,600
+71,300
| +23% | +$7.36M |
|
354
Interactive Brokers
IBKR
$41.9B
| $39.6M | 0.06% |
616,395
-347,245
| -36% | -$23.2M |
|
355
RingCentral
RNG
$5.14B
| $39.5M | 0.06% |
1,367,681
-179,919
| -12% | -$5.12M |
|
356
WIX.com
WIX
$2.77B
| $39.4M | 0.06% |
378,849
-237,300
| -39% | -$28.7M |
|
|
BELFB
357
Bel Fuse Inc Class B
BELFB
$4.28B
| $39.2M | 0.06% |
231,351
-21,500
| -9% | -$3.36M |
|
358
Radware
RDWR
$1.22B
| $39.2M | 0.06% |
1,626,026
-139,704
| -8% | -$3.41M |
|
359
AGCO
AGCO
$7.06B
| $39M | 0.06% |
373,500
+140,700
| +60% | +$15M |
|
360
Itron
ITRI
$4.46B
| $39M | 0.06% |
419,461
-74,900
| -15% | -$8.16M |
|
361
C.H. Robinson
CHRW
$17.2B
| $38.7M | 0.06% |
240,808
+52,300
| +28% | +$7.73M |
|
362
Consolidated Edison
ED
$39.9B
| $38.6M | 0.06% |
388,700
-32,100
| -8% | -$3.19M |
|
363
Invitation Homes
INVH
$17.7B
| $38.4M | 0.06% |
1,383,083
+4,200
| +0.3% | +$117K |
|
364
Rush Street Interactive
RSI
$2.85B
| $38.3M | 0.06% |
1,972,300
+77,000
| +4% | +$1.42M |
|
365
KraneShares CSI China Internet ETF
KWEB
$5.44B
| $38.3M | 0.06% |
1,124,000
+908,000
| +420% | +$34.9M |
|
366
Howmet Aerospace
HWM
$113B
| $38.1M | 0.06% |
185,888
-303,300
| -62% | -$60.4M |
|
367
Teekay
TK
$1.02B
| $37.9M | 0.06% |
4,195,875
-80,700
| -2% | -$742K |
|
368
IES Holdings
IESC
$15.6B
| $37.9M | 0.06% |
97,392
-8,340
| -8% | -$3.35M |
|
369
Inspire Medical Systems
INSP
$1.69B
| $37.9M | 0.06% |
410,768
+255,768
| +165% | +$24.5M |
|
370
Halozyme
HALO
$11.6B
| $37.9M | 0.06% |
562,711
-437,498
| -44% | -$29.4M |
|
371
A10 Networks
ATEN
$2B
| $37.8M | 0.06% |
2,134,734
-252,053
| -11% | -$4.46M |
|
372
Ameriprise Financial
AMP
$49.5B
| $37.8M | 0.06% |
77,000
+46,800
| +155% | +$22.2M |
|
373
Amer Sports
AS
$19.6B
| $37.7M | 0.06% |
1,009,100
+115,500
| +13% | +$3.96M |
|
374
Urban Outfitters
URBN
$6.65B
| $37.4M | 0.06% |
496,500
+201,000
| +68% | +$14.2M |
|
375
Transocean
RIG
$6.38B
| $37.3M | 0.06% |
9,035,328
+7,287,083
| +417% | +$28.3M |
|
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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.