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 | |
|---|---|---|---|---|---|---|
|
ASM
2126
Avino Silver & Gold Mines
ASM
$1.27B
| $1.07M | ﹤0.01% |
298,342
+77,939
| +35% | +$210K |
|
2127
eHealth
EHTH
$39.1M
| $1.07M | ﹤0.01% |
246,376
-86,188
| -26% | -$433K |
|
2128
Primis Financial Corp
FRST
$397M
| $1.07M | ﹤0.01% |
98,750
+14,017
| +17% | +$129K |
|
2129
Aclaris Therapeutics
ACRS
$945M
| $1.06M | ﹤0.01% |
749,660
-70,604
| -9% | -$95.5K |
|
2130
WisdomTree US SmallCap Dividend Fund
DES
$2.2B
| $1.06M | ﹤0.01% |
33,500
-69,300
| -67% | -$2.13M |
|
|
IRBT
2131
DELISTED
iRobot
IRBT
| $1.06M | ﹤0.01% |
339,106
+136,229
| +67% | +$377K |
|
2132
Xometry
XMTR
$4.95B
| $1.06M | ﹤0.01% |
+31,400
| New | +$920K |
|
|
TDAY
2133
USA Today Co
TDAY
$938M
| $1.06M | ﹤0.01% |
296,152
-406,086
| -58% | -$1.36M |
|
|
AOMR
2134
Angel Oak Mortgage REIT
AOMR
$195M
| $1.06M | ﹤0.01% |
112,533
+33,937
| +43% | +$308K |
|
2135
First Internet Bancorp
INBK
$249M
| $1.06M | ﹤0.01% |
39,295
-3,086
| -7% | -$73.6K |
|
2136
Expensify
EXFY
$240M
| $1.05M | ﹤0.01% |
406,804
-173,517
| -30% | -$443K |
|
2137
Five Star Bancorp
FSBC
$1.1B
| $1.05M | ﹤0.01% |
36,904
-3,505
| -9% | -$96.3K |
|
2138
Townsquare Media
TSQ
$108M
| $1.05M | ﹤0.01% |
133,073
+57,069
| +75% | +$404K |
|
2139
International Bancshares
IBOC
$4.41B
| $1.05M | ﹤0.01% |
15,800
+11,790
| +294% | +$736K |
|
2140
Accenture
ACN
$114B
| $1.05M | ﹤0.01% |
3,500
-89,705
| -96% | -$27.3M |
|
2141
Nutrien
NTR
$34.6B
| $1.05M | ﹤0.01% |
17,957
-12,243
| -41% | -$692K |
|
2142
CNO Financial Group
CNO
$4.99B
| $1.04M | ﹤0.01% |
+27,034
| New | +$1.03M |
|
2143
Biohaven
BHVN
$2.16B
| $1.04M | ﹤0.01% |
73,631
+4,508
| +7% | +$80.3K |
|
2144
Ceragon Networks
CRNT
$188M
| $1.04M | ﹤0.01% |
421,050
-226,969
| -35% | -$518K |
|
2145
Construction Partners
ROAD
$6.22B
| $1.03M | ﹤0.01% |
9,738
-21,073
| -68% | -$1.97M |
|
2146
iShares US Small Cap Value Factor ETF
SVAL
$210M
| $1.03M | ﹤0.01% |
33,300
+4,800
| +17% | +$141K |
|
2147
Fossil Group
FOSL
$320M
| $1.03M | ﹤0.01% |
696,900
-109,402
| -14% | -$138K |
|
2148
Kilroy Realty
KRC
$4.29B
| $1.03M | ﹤0.01% |
30,007
-99,644
| -77% | -$3.25M |
|
2149
iShares ESG MSCI USA Leaders ETF
SUSL
$1.22B
| $1.03M | ﹤0.01% |
+9,500
| New | +$947K |
|
|
MPT
2150
Medical Properties Trust
MPT
$2.46B
| $1.03M | ﹤0.01% |
238,700
-323,900
| -58% | -$1.6M |
|
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.