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 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$474M |
| 2 |
State Street Consumer Staples Select Sector SPDR ETF
XLP
|
+$357M |
| 3 |
Accenture
ACN
|
+$246M |
| 4 |
Advanced Micro Devices
AMD
|
+$235M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$231M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$381M |
| 2 |
State Street Technology Select Sector SPDR ETF
XLK
|
+$375M |
| 3 |
iShares Expanded Tech-Software Sector ETF
IGV
|
+$348M |
| 4 |
Thermo Fisher Scientific
TMO
|
+$292M |
| 5 |
Snowflake
SNOW
|
+$258M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 16.18% |
| 2 | Financials | 15.54% |
| 3 | Industrials | 10.5% |
| 4 | Healthcare | 9.8% |
| 5 | Consumer Discretionary | 8.1% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2751
PUT
Phillips 66
PSX
$96B
| $680K | ﹤0.01% |
+5,000
| New | +$641K |
|
|
PMT
2752
PennyMac Mortgage Investment
PMT
$807M
| $678K | ﹤0.01% |
55,304
+23,879
| +76% | +$295K |
|
2753
CALL
AT&T
T
$176B
| $678K | ﹤0.01% |
+24,000
| New | +$682K |
|
|
SKE
2754
Skeena Resources
SKE
$4.35B
| $675K | ﹤0.01% |
36,621
-101,900
| -74% | -$1.67M |
|
2755
American Century US Quality Value ETF
VALQ
$344M
| $670K | ﹤0.01% |
+10,400
| New | +$658K |
|
|
BRSL
2756
Brightstar Lottery PLC
BRSL
$2.14B
| $670K | ﹤0.01% |
+38,827
| New | +$622K |
|
2757
PUT
SolarEdge
SEDG
$1.9B
| $670K | ﹤0.01% |
+18,100
| New | +$540K |
|
2758
Expedia Group
EXPE
$40.4B
| $670K | ﹤0.01% |
3,133
-9,867
| -76% | -$1.98M |
|
2759
Oxford Square Capital
OXSQ
$150M
| $670K | ﹤0.01% |
421,102
-258,107
| -38% | -$567K |
|
2760
PUT
Core Scientific
CORZ
$5.74B
| $667K | ﹤0.01% |
37,200
+1,700
| +5% | +$24.9K |
|
2761
PUT
Dominion Energy
D
$58.8B
| $667K | ﹤0.01% |
+10,900
| New | +$648K |
|
2762
CALL
Medtronic
MDT
$118B
| $667K | ﹤0.01% |
+7,000
| New | +$643K |
|
|
WCC
2763
WESCO International
WCC
$16.6B
| $666K | ﹤0.01% |
+3,151
| New | +$662K |
|
2764
State Street SPDR S&P Kensho Clean Power ETF
CNRG
$192M
| $665K | ﹤0.01% |
+7,900
| New | +$564K |
|
2765
Pediatrix Medical
MD
$2.2B
| $665K | ﹤0.01% |
+39,672
| New | +$595K |
|
2766
Matrix Service
MTRX
$305M
| $664K | ﹤0.01% |
+50,731
| New | +$721K |
|
|
BFS
2767
Saul Centers
BFS
$847M
| $662K | ﹤0.01% |
20,780
-5,128
| -20% | -$169K |
|
2768
CALL
ConocoPhillips
COP
$158B
| $662K | ﹤0.01% |
+7,000
| New | +$662K |
|
|
2769
PUT
ConocoPhillips
COP
$158B
| $662K | ﹤0.01% |
+7,000
| New | +$662K |
|
2770
Comtech Telecommunications
CMTL
$52.7M
| $662K | ﹤0.01% |
256,607
+106,866
| +71% | +$244K |
|
2771
PUT
Altria Group
MO
$114B
| $661K | ﹤0.01% |
+10,000
| New | +$634K |
|
2772
Replimune Group
REPL
$1.42B
| $660K | ﹤0.01% |
157,499
+135,078
| +602% | +$863K |
|
2773
CALL
Broadcom
AVGO
$1.72T
| $660K | ﹤0.01% |
+2,000
| New | +$614K |
|
2774
FirstService
FSV
$6.26B
| $659K | ﹤0.01% |
3,459
+400
| +13% | +$77.4K |
|
2775
Voyager Therapeutics
VYGR
$218M
| $657K | ﹤0.01% |
+140,715
| New | +$509K |
|
Similar funds
John Overdeck's Q3 2025 Portfolio in Review
As of Q3 2025, John Overdeck held 4,027 positions worth $67.2B, up 19% from $56.5B the previous quarter. Its ten largest holdings account for 6.2% of the portfolio.
John Overdeck deployed $4.46B of net new capital in Q3 2025, opening 877 new positions and adding to 1,461 existing holdings. Its largest new stake was Berkshire Hathaway Class B: 379,096 shares worth $191M.
By sector, the portfolio is most concentrated in Technology at 16% of assets, down from 17% a quarter earlier, followed by Financials and Industrials.
On the sell side, the largest reduction was Invesco QQQ Trust, an estimated $381M trimmed.
- John Overdeck's largest Q3 2025 buy was Berkshire Hathaway Class B: 379,096 shares worth $191M.
- John Overdeck added most to State Street Financial Select Sector SPDR ETF in Q3 2025, an estimated $474M increase.
- John Overdeck's biggest Q3 2025 reduction was Invesco QQQ Trust, cutting an estimated $381M.
- John Overdeck fully exited NextEra Energy, Inc. 6.926% Corporate Units in Q3 2025, selling an estimated $115M.
- John Overdeck's ten largest holdings make up 6.2% of its $67.2B portfolio in Q3 2025.
- John Overdeck opened 877 new positions and closed 399 in Q3 2025.
- John Overdeck's portfolio value rose 19% quarter-over-quarter to $67.2B.
Based on Two Sigma Investments's 13F filing for Q3 2025, filed 14 Nov 2025.