John Overdeck Two Sigma Investments
John Overdeck is a co-founder of Two Sigma Investments, one of the world’s leading quantitative and technology-driven investment firms. Two Sigma applies data science, machine learning, and large-scale computing to markets across asset classes. Overdeck’s firm is a central reference point in discussions of modern systematic investing.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares Expanded Tech-Software Sector ETF
IGV
|
+$312M |
| 2 |
UnitedHealth
UNH
|
+$286M |
| 3 |
Duolingo
DUOL
|
+$247M |
| 4 |
Aon
AON
|
+$226M |
| 5 |
Chubb
CB
|
+$221M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$338M |
| 2 |
Marvell Technology
MRVL
|
+$241M |
| 3 |
Advanced Micro Devices
AMD
|
+$240M |
| 4 |
ServiceNow
NOW
|
+$203M |
| 5 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$193M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 16.79% |
| 2 | Financials | 14.46% |
| 3 | Healthcare | 12.9% |
| 4 | Consumer Discretionary | 8.97% |
| 5 | Industrials | 8.82% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1
Invesco QQQ Trust
QQQ
$486B
| $739M | 1.31% |
1,339,733
+432,088
| +48% | +$215M |
|
|
2
State Street SPDR S&P 500 ETF Trust
SPY
$809B
| $715M | 1.27% |
1,157,598
-337,135
| -23% | -$193M |
|
3
iShares Russell 1000 Growth ETF
IWF
$125B
| $473M | 0.84% |
4,456,400
+294,000
| +7% | +$28.1M |
|
4
Vanguard Morningstar Growth ETF
VUG
$225B
| $457M | 0.81% |
6,257,400
+132,000
| +2% | +$8.69M |
|
5
State Street Technology Select Sector SPDR ETF
XLK
$120B
| $367M | 0.65% |
2,896,662
-1,280,740
| -31% | -$142M |
|
6
iShares Core S&P 500 ETF
IVV
$893B
| $351M | 0.62% |
564,700
+5,700
| +1% | +$3.27M |
|
|
7
iShares Expanded Tech-Software Sector ETF
IGV
$14.3B
| $345M | 0.61% |
+3,154,300
| New | +$312M |
|
8
NVIDIA
NVDA
$5.2T
| $299M | 0.53% |
1,893,594
-439,451
| -19% | -$55.3M |
|
9
Amazon
AMZN
$2.79T
| $291M | 0.51% |
1,325,041
+597,321
| +82% | +$118M |
|
10
Netflix
NFLX
$331B
| $288M | 0.51% |
2,152,160
+39,780
| +2% | +$4.5M |
|
11
Apple
AAPL
$4.51T
| $288M | 0.51% |
1,404,489
+357,687
| +34% | +$72.2M |
|
12
Carvana
CVNA
$76.9B
| $278M | 0.49% |
4,120,820
+1,182,305
| +40% | +$64.8M |
|
13
Palantir
PLTR
$432B
| $273M | 0.48% |
2,000,926
-815,797
| -29% | -$95.7M |
|
14
Snowflake
SNOW
$115B
| $272M | 0.48% |
1,217,039
-431,314
| -26% | -$78M |
|
15
Salesforce
CRM
$171B
| $271M | 0.48% |
993,387
+27,663
| +3% | +$7.4M |
|
16
Cloudflare
NET
$104B
| $267M | 0.47% |
1,363,214
-20,803
| -2% | -$3.02M |
|
17
Boston Scientific
BSX
$73B
| $265M | 0.47% |
2,466,376
+25,629
| +1% | +$2.59M |
|
18
Microsoft
MSFT
$3.59T
| $263M | 0.47% |
529,591
-65,163
| -11% | -$28.3M |
|
19
Mastercard
MA
$509B
| $263M | 0.47% |
467,387
+60,964
| +15% | +$33.7M |
|
20
Sea Limited
SE
$72B
| $263M | 0.46% |
1,641,413
+602,208
| +58% | +$87.2M |
|
21
Regeneron Pharmaceuticals
REGN
$85.9B
| $262M | 0.46% |
499,828
+127,757
| +34% | +$71.3M |
|
22
Roblox
RBLX
$27.4B
| $261M | 0.46% |
2,482,023
-1,517,856
| -38% | -$119M |
|
|
SCHW
23
Charles Schwab
SCHW
$194B
| $259M | 0.46% |
2,843,926
+897,724
| +46% | +$75.2M |
|
24
SoFi Technologies
SOFI
$24.4B
| $259M | 0.46% |
14,241,585
+4,740,193
| +50% | +$62.5M |
|
25
Adobe
ADBE
$109B
| $259M | 0.46% |
668,638
+49,100
| +8% | +$18.9M |
|
Similar funds
John Overdeck's Q2 2025 Portfolio in Review
As of Q2 2025, John Overdeck held 3,681 positions worth $56.5B, up 21% from $46.8B the previous quarter. Its ten largest holdings account for 7.7% of the portfolio.
John Overdeck deployed $2.96B of net new capital in Q2 2025, opening 509 new positions and adding to 1,200 existing holdings. Its largest new stake was iShares Expanded Tech-Software Sector ETF: 3,154,300 shares worth $345M.
By sector, the portfolio is most concentrated in Technology at 17% of assets, down from 18% a quarter earlier, followed by Financials and Healthcare.
On the sell side, the largest reduction was Broadcom, an estimated $338M trimmed.
- John Overdeck's largest Q2 2025 buy was iShares Expanded Tech-Software Sector ETF: 3,154,300 shares worth $345M.
- John Overdeck added most to UnitedHealth in Q2 2025, an estimated $286M increase.
- John Overdeck's biggest Q2 2025 reduction was Broadcom, cutting an estimated $338M.
- John Overdeck fully exited State Street Utilities Select Sector SPDR ETF in Q2 2025, selling an estimated $134M.
- John Overdeck's ten largest holdings make up 7.7% of its $56.5B portfolio in Q2 2025.
- John Overdeck opened 509 new positions and closed 531 in Q2 2025.
- John Overdeck's portfolio value rose 21% quarter-over-quarter to $56.5B.
Based on Two Sigma Investments's 13F filing for Q2 2025, filed 14 Aug 2025.