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 | |
|---|---|---|---|---|---|---|
2351
SiriusPoint
SPNT
$2.79B
| $711K | ﹤0.01% |
34,854
+5,483
| +19% | +$101K |
|
|
BZUN
2352
Baozun
BZUN
$164M
| $710K | ﹤0.01% |
284,097
-157,816
| -36% | -$437K |
|
|
RWT
2353
Redwood Trust
RWT
$598M
| $709K | ﹤0.01% |
119,933
-207,368
| -63% | -$1.18M |
|
2354
ABM Industries
ABM
$2.75B
| $706K | ﹤0.01% |
14,951
+9,437
| +171% | +$456K |
|
2355
Willis Towers Watson
WTW
$32.6B
| $705K | ﹤0.01% |
2,300
-14,189
| -86% | -$4.4M |
|
2356
Thryv Holdings
THRY
$87.5M
| $704K | ﹤0.01% |
57,900
+11,721
| +25% | +$151K |
|
2357
Civeo
CVEO
$348M
| $704K | ﹤0.01% |
30,477
-10,388
| -25% | -$220K |
|
|
AFGR
2358
First Trust Active Factor Large Cap Growth ETF
AFGR
$92.2M
| $703K | ﹤0.01% |
+20,900
| New | +$622K |
|
|
WSR
2359
DELISTED
Whitestone REIT
WSR
| $703K | ﹤0.01% |
56,323
+38,918
| +224% | +$495K |
|
2360
Orion
OEC
$340M
| $703K | ﹤0.01% |
66,994
+10,023
| +18% | +$113K |
|
2361
American Healthcare REIT
AHR
$12.2B
| $701K | ﹤0.01% |
19,069
-83,585
| -81% | -$2.78M |
|
|
IAUX
2362
i-80 Gold Corp
IAUX
$1.66B
| $700K | ﹤0.01% |
+1,169,936
| New | +$690K |
|
2363
Energy Services of America
ESOA
$215M
| $700K | ﹤0.01% |
70,426
+40,080
| +132% | +$384K |
|
2364
Investar Holding Corp
ISTR
$418M
| $695K | ﹤0.01% |
35,948
-1,256
| -3% | -$23.2K |
|
2365
Lifeway Foods
LWAY
$398M
| $693K | ﹤0.01% |
28,108
-12,608
| -31% | -$299K |
|
2366
Principal Exchange-Traded Funds Principal Quality ETF
PSET
$28.9M
| $692K | ﹤0.01% |
+9,400
| New | +$639K |
|
|
MSB
2367
Mesabi Trust
MSB
$305M
| $691K | ﹤0.01% |
28,824
-7,765
| -21% | -$202K |
|
2368
NACCO Industries
NC
$309M
| $687K | ﹤0.01% |
15,499
-1,995
| -11% | -$72.3K |
|
2369
Commercial Vehicle Group
CVGI
$124M
| $684K | ﹤0.01% |
411,920
+54,840
| +15% | +$66.7K |
|
|
NUVL
2370
DELISTED
Nuvalent
NUVL
| $684K | ﹤0.01% |
8,959
-150,164
| -94% | -$11M |
|
2371
Telos
TLS
$327M
| $681K | ﹤0.01% |
+214,849
| New | +$558K |
|
2372
FreightCar America
RAIL
$234M
| $677K | ﹤0.01% |
78,587
-2,378
| -3% | -$16.6K |
|
2373
BlackRock Enhanced Equity Dividend Trust
BDJ
$1.73B
| $676K | ﹤0.01% |
+76,025
| New | +$639K |
|
2374
PUT
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$5.07B
| $672K | ﹤0.01% |
25,000
| – | – |
|
2375
Tiptree Inc
TIPT
$690M
| $667K | ﹤0.01% |
28,276
-7,578
| -21% | -$169K |
|
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.