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 |
Intuit
INTU
|
+$753M |
| 2 |
Boston Scientific
BSX
|
+$540M |
| 3 |
Dow Inc
DOW
|
+$485M |
| 4 |
Wells Fargo
WFC
|
+$457M |
| 5 |
Goldman Sachs
GS
|
+$378M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Micron Technology
MU
|
+$1.32B |
| 2 |
NVIDIA
NVDA
|
+$1.02B |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$787M |
| 4 |
SNDK
Sandisk
SNDK
|
+$744M |
| 5 |
Dell
DELL
|
+$688M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 19.71% |
| 2 | Financials | 15.22% |
| 3 | Healthcare | 11.94% |
| 4 | Industrials | 11.55% |
| 5 | Consumer Discretionary | 9.6% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3601
PUT
Scorpio Tankers
STNG
$3.93B
| $921K | ﹤0.01% |
+13,300
| New | +$1.04M |
|
|
BPAC
3602
Blueport Acquisition Ltd
BPAC
$75.2M
| $917K | ﹤0.01% |
90,625
| – | – |
|
3603
PUT
HP
HPQ
$27.2B
| $917K | ﹤0.01% |
41,800
+6,200
| +17% | +$137K |
|
3604
PUT
Aflac
AFL
$58.2B
| $915K | ﹤0.01% |
7,800
+5,800
| +290% | +$668K |
|
|
WSTN
3605
Westin Acquisition Corp
WSTN
$81.8M
| $914K | ﹤0.01% |
90,625
| – | – |
|
|
XMAX
3606
XMAX Inc
XMAX
$556M
| $913K | ﹤0.01% |
100,483
-69,792
| -41% | -$560K |
|
3607
PUT
American Express
AXP
$227B
| $913K | ﹤0.01% |
2,700
-700
| -21% | -$224K |
|
3608
BGC Group
BGC
$5.63B
| $913K | ﹤0.01% |
85,411
-997,971
| -92% | -$11.2M |
|
3609
PLDT
PHI
$4.19B
| $913K | ﹤0.01% |
52,098
+19,586
| +60% | +$379K |
|
|
MOBI
3610
Mobia Medical
MOBI
$353M
| $912K | ﹤0.01% |
+68,031
| New | +$881K |
|
3611
Regional Management Corp
RM
$315M
| $910K | ﹤0.01% |
22,083
-8,080
| -27% | -$296K |
|
3612
CALL
Cigna
CI
$73.3B
| $910K | ﹤0.01% |
+3,300
| New | +$932K |
|
3613
CALL
ITT
ITT
$18.6B
| $910K | ﹤0.01% |
+4,600
| New | +$930K |
|
3614
Barrett Business Services
BBSI
$813M
| $909K | ﹤0.01% |
25,601
-120,620
| -82% | -$3.79M |
|
|
SARO
3615
StandardAero Inc
SARO
$8.29B
| $909K | ﹤0.01% |
30,400
+9,600
| +46% | +$252K |
|
3616
Worthington Steel
WS
$1.78B
| $908K | ﹤0.01% |
27,046
-34,254
| -56% | -$1.31M |
|
3617
Expensify
EXFY
$241M
| $907K | ﹤0.01% |
506,979
+142,756
| +39% | +$160K |
|
3618
PUT
Walmart Inc
WMT
$825B
| $906K | ﹤0.01% |
8,000
-41,000
| -84% | -$5.09M |
|
3619
BRC Group Holdings
RILY
$286M
| $904K | ﹤0.01% |
112,497
+43,349
| +63% | +$368K |
|
|
NBRG
3620
Newbridge Acquisition Ltd
NBRG
$75.8M
| $904K | ﹤0.01% |
+90,625
| New | +$900K |
|
3621
Phreesia
PHR
$749M
| $902K | ﹤0.01% |
87,644
+51,844
| +145% | +$481K |
|
3622
VictoryShares US Small Cap High Div Volatility Wtd ETF
CSB
$262M
| $899K | ﹤0.01% |
13,700
-100
| -0.7% | -$6.39K |
|
3623
CALL
Vertex Pharmaceuticals
VRTX
$139B
| $894K | ﹤0.01% |
+1,800
| New | +$798K |
|
3624
PUT
Axcelis
ACLS
$3.92B
| $890K | ﹤0.01% |
+4,700
| New | +$697K |
|
|
ASG
3625
Liberty All-Star Growth Fund
ASG
$336M
| $889K | ﹤0.01% |
162,452
| – | – |
|
Similar funds
John Overdeck's Q2 2026 Portfolio in Review
As of Q2 2026, John Overdeck held 5,589 positions worth $138B, up 11% from $124B the previous quarter. Its ten largest holdings account for 8.3% of the portfolio.
John Overdeck withdrew a net $4.38B in Q2 2026, closing 572 positions and reducing 1,756 holdings. Its most notable exit was State Street Technology Select Sector SPDR ETF, an estimated $172M position sold in full.
By sector, the portfolio is most concentrated in Technology at 20% of assets, up from 19% a quarter earlier, followed by Financials and Healthcare.
Against the trend, John Overdeck opened a new position in Intuit worth $564M.
- John Overdeck's largest Q2 2026 buy was Intuit: 2,161,507 shares worth $564M.
- John Overdeck added most to Boston Scientific in Q2 2026, an estimated $540M increase.
- John Overdeck's biggest Q2 2026 reduction was Micron Technology, cutting an estimated $1.32B.
- John Overdeck fully exited State Street Technology Select Sector SPDR ETF in Q2 2026, selling an estimated $172M.
- John Overdeck's ten largest holdings make up 8.3% of its $138B portfolio in Q2 2026.
- John Overdeck opened 1,050 new positions and closed 572 in Q2 2026.
- John Overdeck's portfolio value rose 11% quarter-over-quarter to $138B.
Based on Two Sigma Investments's 13F filing for Q2 2026, filed 14 Aug 2026.