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 | |
|---|---|---|---|---|---|---|
251
Albemarle
ALB
$15.3B
| $57.9M | 0.09% |
409,345
+221,137
| +117% | +$25.1M |
|
252
IAMGOLD
IAG
$10.4B
| $57.9M | 0.09% |
3,510,819
-3,123,585
| -47% | -$44M |
|
253
Liberty Global Class A
LBTYA
$3.48B
| $57.3M | 0.09% |
5,147,310
-584,844
| -10% | -$6.47M |
|
254
Klaviyo
KVYO
$5.23B
| $57.3M | 0.09% |
1,763,744
+80,400
| +5% | +$2.25M |
|
255
ConocoPhillips
COP
$151B
| $56.8M | 0.09% |
606,894
+35,700
| +6% | +$3.23M |
|
256
Masco
MAS
$15B
| $56.6M | 0.09% |
892,000
+571,500
| +178% | +$37.1M |
|
257
Markel Group
MKL
$22.8B
| $56M | 0.09% |
26,031
+4,250
| +20% | +$8.61M |
|
|
TPC
258
Tutor Perini Cor
TPC
$5.13B
| $55.9M | 0.09% |
834,080
-104,000
| -11% | -$6.82M |
|
259
Teladoc Health
TDOC
$1.24B
| $55.8M | 0.09% |
7,978,142
-198,700
| -2% | -$1.56M |
|
260
Mercado Libre
MELI
$98.4B
| $55.4M | 0.09% |
27,528
-32,820
| -54% | -$68.9M |
|
261
Duolingo
DUOL
$6.34B
| $55.4M | 0.09% |
315,554
-225,946
| -42% | -$53.2M |
|
262
Colliers International
CIGI
$5.3B
| $55.4M | 0.09% |
376,700
-86,600
| -19% | -$13M |
|
263
Capital One
COF
$134B
| $55.3M | 0.09% |
+228,304
| New | +$50.8M |
|
264
Rubrik
RBRK
$20B
| $55.3M | 0.09% |
723,389
-84,311
| -10% | -$6.47M |
|
265
Viking Holdings
VIK
$45.3B
| $55.2M | 0.09% |
772,604
-703,501
| -48% | -$44.9M |
|
266
Builders FirstSource
BLDR
$8.08B
| $55M | 0.09% |
+534,741
| New | +$60.1M |
|
|
B
267
Barrick Mining
B
$66B
| $54.7M | 0.08% |
+1,256,778
| New | +$47.1M |
|
268
Riot Platforms
RIOT
$7.6B
| $54.3M | 0.08% |
4,289,149
+1,489,400
| +53% | +$25.5M |
|
269
Commerce Bancshares
CBSH
$8.47B
| $54.3M | 0.08% |
1,037,726
-10,369
| -1% | -$542K |
|
270
Linde
LIN
$226B
| $54.3M | 0.08% |
+127,300
| New | +$54.5M |
|
271
GoDaddy
GDDY
$11.5B
| $54M | 0.08% |
435,500
-325,400
| -43% | -$42.1M |
|
272
Symbotic
SYM
$5.41B
| $53.9M | 0.08% |
905,700
+177,800
| +24% | +$11.7M |
|
273
Marqeta
MQ
$1.62B
| $53.9M | 0.08% |
2,835,589
-546,683
| -16% | -$10.5M |
|
274
James Hardie Industries
JHX
$18B
| $53.6M | 0.08% |
+2,585,089
| New | +$51.8M |
|
275
Pilgrim's Pride
PPC
$6.4B
| $53.4M | 0.08% |
1,370,724
-54,989
| -4% | -$2.11M |
|
Similar funds
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.