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 Technology Select Sector SPDR ETF
XLK
|
+$395M |
| 2 |
Vanguard Real Estate ETF
VNQ
|
+$321M |
| 3 |
State Street Consumer Discretionary Select Sector SPDR ETF
XLY
|
+$318M |
| 4 |
ServiceNow
NOW
|
+$272M |
| 5 |
Schwab US REIT ETF
SCHH
|
+$248M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$547M |
| 2 |
State Street Consumer Staples Select Sector SPDR ETF
XLP
|
+$447M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$377M |
| 4 |
iShares MSCI USA Quality Factor ETF
QUAL
|
+$299M |
| 5 |
Alphabet (Google) Class A
GOOGL
|
+$269M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 15.53% |
| 2 | Financials | 13% |
| 3 | Industrials | 11.22% |
| 4 | Healthcare | 10.29% |
| 5 | Consumer Discretionary | 9.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3301
International Bancshares
IBOC
$4.45B
| $431K | ﹤0.01% |
6,492
-62,166
| -91% | -$4.21M |
|
3302
Weibo
WB
$1.72B
| $431K | ﹤0.01% |
+42,200
| New | +$453K |
|
3303
CALL
Emcor
EME
$33.7B
| $428K | ﹤0.01% |
+700
| New | +$453K |
|
|
PVLA
3304
Palvella Therapeutics
PVLA
$2.1B
| $428K | ﹤0.01% |
4,090
| – | – |
|
3305
CALL
Lemonade
LMND
$4.17B
| $427K | ﹤0.01% |
+6,000
| New | +$403K |
|
3306
CALL
HP
HPQ
$26.1B
| $423K | ﹤0.01% |
19,000
+9,300
| +96% | +$237K |
|
3307
Park Aerospace
PKE
$718M
| $423K | ﹤0.01% |
19,825
-1,400
| -7% | -$27.9K |
|
3308
ADC Therapeutics
ADCT
$123M
| $422K | ﹤0.01% |
119,461
+74,003
| +163% | +$300K |
|
3309
CALL
Energy Fuels
UUUU
$3.72B
| $422K | ﹤0.01% |
29,000
+15,000
| +107% | +$255K |
|
3310
CALL
Array Technologies
ARRY
$704M
| $421K | ﹤0.01% |
+45,700
| New | +$392K |
|
3311
ALPS O'Shares U.S. Quality Dividend ETF
OUSA
$760M
| $421K | ﹤0.01% |
7,300
-16,600
| -69% | -$942K |
|
|
3312
PUT
Energy Fuels
UUUU
$3.72B
| $420K | ﹤0.01% |
28,900
+4,800
| +20% | +$81.5K |
|
3313
CALL
On Holding
ONON
$9.86B
| $418K | ﹤0.01% |
+9,000
| New | +$388K |
|
|
3314
PUT
On Holding
ONON
$9.86B
| $418K | ﹤0.01% |
+9,000
| New | +$388K |
|
3315
Schwab US Large- Cap ETF
SCHX
$73.8B
| $418K | ﹤0.01% |
15,536
| – | – |
|
3316
Rimini Street
RMNI
$486M
| $417K | ﹤0.01% |
107,588
-157,678
| -59% | -$654K |
|
|
QIPT
3317
DELISTED
Quipt Home Medical
QIPT
| $417K | ﹤0.01% |
+118,225
| New | +$313K |
|
3318
Cable One
CABO
$130M
| $417K | ﹤0.01% |
+3,697
| New | +$504K |
|
3319
PUT
3M
MMM
$92.3B
| $416K | ﹤0.01% |
+2,600
| New | +$425K |
|
3320
Fidelity Stocks for Inflation ETF
FCPI
$290M
| $416K | ﹤0.01% |
+8,400
| New | +$420K |
|
3321
Arthur J. Gallagher & Co
AJG
$69.7B
| $415K | ﹤0.01% |
+1,604
| New | +$425K |
|
3322
PUT
Constellation Brands
STZ
$23.5B
| $414K | ﹤0.01% |
+3,000
| New | +$412K |
|
3323
CALL
Novartis
NVS
$300B
| $414K | ﹤0.01% |
+3,000
| New | +$393K |
|
3324
Cars.com
CARS
$662M
| $413K | ﹤0.01% |
+33,869
| New | +$394K |
|
3325
CALL
ATI
ATI
$28.6B
| $413K | ﹤0.01% |
+3,600
| New | +$351K |
|
Similar funds
John Overdeck's Q4 2025 Portfolio in Review
As of Q4 2025, John Overdeck held 4,545 positions worth $70.9B, up 5.5% from $67.2B the previous quarter. Its ten largest holdings account for 4.9% of the portfolio.
John Overdeck's Q4 2025 filing shows 899 new, 1,598 increased, 1,287 reduced and 504 closed positions. Its largest new stake was Vanguard Real Estate ETF: 3,573,400 shares worth $316M. The largest sale was State Street Financial Select Sector SPDR ETF, an estimated $547M.
By sector, the portfolio is most concentrated in Technology at 16% of assets, down from 16% a quarter earlier, followed by Financials and Industrials.
- John Overdeck's largest Q4 2025 buy was Vanguard Real Estate ETF: 3,573,400 shares worth $316M.
- John Overdeck added most to State Street Technology Select Sector SPDR ETF in Q4 2025, an estimated $395M increase.
- John Overdeck's biggest Q4 2025 reduction was State Street Financial Select Sector SPDR ETF, cutting an estimated $547M.
- John Overdeck fully exited State Street SPDR Dow Jones Industrial Average ETF Trust in Q4 2025, selling an estimated $240M.
- John Overdeck's ten largest holdings make up 4.9% of its $70.9B portfolio in Q4 2025.
- John Overdeck opened 899 new positions and closed 504 in Q4 2025.
- John Overdeck's portfolio value rose 5.5% quarter-over-quarter to $70.9B.
Based on Two Sigma Investments's 13F filing for Q4 2025, filed 17 Feb 2026.