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 | |
|---|---|---|---|---|---|---|
626
Kura Oncology
KURA
$896M
| $19M | 0.03% |
1,830,566
+965,256
| +112% | +$10.1M |
|
627
QCR Holdings
QCRH
$1.75B
| $19M | 0.03% |
227,871
-58,701
| -20% | -$4.62M |
|
628
Domino's
DPZ
$11.6B
| $18.9M | 0.03% |
45,460
-53,168
| -54% | -$22.2M |
|
629
Hasbro
HAS
$13.6B
| $18.9M | 0.03% |
+231,000
| New | +$18.1M |
|
630
Universal Technical Institute
UTI
$1.42B
| $18.9M | 0.03% |
724,630
-216,561
| -23% | -$6.13M |
|
|
TERN
631
DELISTED
Terns Pharmaceuticals
TERN
| $18.9M | 0.03% |
466,847
-209,987
| -31% | -$4.85M |
|
632
Dentsply Sirona
XRAY
$2.31B
| $18.8M | 0.03% |
1,646,871
+220,452
| +15% | +$2.59M |
|
633
Weatherford International
WFRD
$6.6B
| $18.8M | 0.03% |
240,253
-195,100
| -45% | -$14.2M |
|
634
LKQ Corp
LKQ
$6.38B
| $18.7M | 0.03% |
+619,260
| New | +$18.7M |
|
635
Array Technologies
ARRY
$796M
| $18.7M | 0.03% |
2,026,900
-2,286,300
| -53% | -$19.6M |
|
636
Zillow
ZG
$8.15B
| $18.5M | 0.03% |
271,700
+98,900
| +57% | +$6.96M |
|
637
Waterstone Financial
WSBF
$385M
| $18.5M | 0.03% |
1,117,236
-34,400
| -3% | -$539K |
|
638
Applied Industrial Technologies
AIT
$13.2B
| $18.5M | 0.03% |
71,950
+8,000
| +13% | +$2.05M |
|
639
iRhythm Holdings
IRTC
$4.06B
| $18.4M | 0.03% |
103,900
-17,500
| -14% | -$3.1M |
|
|
REVG
640
DELISTED
REV Group
REVG
| $18.4M | 0.03% |
301,892
+28,392
| +10% | +$1.59M |
|
641
Alphatec Holdings
ATEC
$1.51B
| $18.3M | 0.03% |
870,131
-108,869
| -11% | -$2.02M |
|
642
Genuine Parts
GPC
$18.7B
| $18.3M | 0.03% |
148,500
+42,000
| +39% | +$5.44M |
|
643
Root
ROOT
$772M
| $18.2M | 0.03% |
251,981
-81,635
| -24% | -$6.5M |
|
644
Metallus
MTUS
$892M
| $18.2M | 0.03% |
1,059,033
+90,200
| +9% | +$1.55M |
|
645
Corebridge Financial
CRBG
$15.3B
| $18M | 0.03% |
597,900
+490,100
| +455% | +$15.1M |
|
646
Cirrus Logic
CRUS
$6.08B
| $18M | 0.03% |
152,043
+46,523
| +44% | +$5.73M |
|
647
Franklin Resources
BEN
$17.2B
| $18M | 0.03% |
753,300
-110,300
| -13% | -$2.53M |
|
648
Thomson Reuters
TRI
$46B
| $18M | 0.03% |
134,289
+89,201
| +198% | +$12.9M |
|
649
Arrow Electronics
ARW
$10.6B
| $18M | 0.03% |
+163,100
| New | +$18.5M |
|
650
Joby Aviation
JOBY
$8.17B
| $18M | 0.03% |
+1,360,000
| New | +$20.9M |
|
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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.