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 | |
|---|---|---|---|---|---|---|
2101
Vanguard Health Care ETF
VHT
$19.8B
| $1.12M | ﹤0.01% |
4,500
-6,500
| -59% | -$1.61M |
|
2102
AtaiBeckley Inc
ATAI
$2.75B
| $1.12M | ﹤0.01% |
510,061
+138,096
| +37% | +$248K |
|
|
MOMO
2103
Hello Group
MOMO
$842M
| $1.11M | ﹤0.01% |
132,066
-112,181
| -46% | -$734K |
|
|
SVT
2104
DELISTED
Servotronics
SVT
| $1.11M | ﹤0.01% |
+23,693
| New | +$668K |
|
2105
Unity Bancorp
UNTY
$594M
| $1.11M | ﹤0.01% |
+23,580
| New | +$1.02M |
|
2106
CSX Corp
CSX
$95.4B
| $1.11M | ﹤0.01% |
33,980
-3,989,959
| -99% | -$120M |
|
|
UNIT
2107
Uniti Group
UNIT
$2.44B
| $1.11M | ﹤0.01% |
256,465
-481,975
| -65% | -$2.16M |
|
2108
Future Fuel
FF
$238M
| $1.11M | ﹤0.01% |
285,542
+25,889
| +10% | +$104K |
|
2109
Quantum-Si Incorporated
QSI
$184M
| $1.11M | ﹤0.01% |
564,442
-252,533
| -31% | -$374K |
|
2110
Garrett Motion
GTX
$4.87B
| $1.1M | ﹤0.01% |
+104,821
| New | +$1.06M |
|
|
HONE
2111
DELISTED
HarborOne Bancorp
HONE
| $1.1M | ﹤0.01% |
94,164
-113,777
| -55% | -$1.24M |
|
2112
Kulicke & Soffa
KLIC
$4.43B
| $1.1M | ﹤0.01% |
31,770
-37,490
| -54% | -$1.22M |
|
2113
Jack Henry & Associates
JKHY
$12.2B
| $1.1M | ﹤0.01% |
6,100
| – | – |
|
|
PINE
2114
Alpine Income Property Trust
PINE
$346M
| $1.1M | ﹤0.01% |
74,593
+35,415
| +90% | +$547K |
|
2115
Xcel Energy
XEL
$48.2B
| $1.1M | ﹤0.01% |
16,100
-454,599
| -97% | -$31.5M |
|
2116
Accel Entertainment
ACEL
$969M
| $1.09M | ﹤0.01% |
93,027
-15,708
| -14% | -$175K |
|
2117
First United
FUNC
$277M
| $1.09M | ﹤0.01% |
+35,280
| New | +$1.04M |
|
2118
Usana Health Sciences
USNA
$253M
| $1.09M | ﹤0.01% |
+35,775
| New | +$1.02M |
|
2119
Fidelity Magellan ETF
FMAG
$246M
| $1.09M | ﹤0.01% |
+31,800
| New | +$990K |
|
2120
Compass Minerals
CMP
$1.02B
| $1.09M | ﹤0.01% |
54,076
-6,150
| -10% | -$99.4K |
|
2121
CorVel
CRVL
$3.52B
| $1.09M | ﹤0.01% |
+10,570
| New | +$1.16M |
|
2122
Farmers National Banc Corp
FMNB
$924M
| $1.09M | ﹤0.01% |
78,755
-12,615
| -14% | -$165K |
|
2123
Monte Rosa Therapeutics
GLUE
$1.23B
| $1.08M | ﹤0.01% |
239,937
+16,807
| +8% | +$75K |
|
|
BWAY
2124
Brainsway
BWAY
$578M
| $1.08M | ﹤0.01% |
164,392
-16,150
| -9% | -$80.2K |
|
2125
Erie Indemnity
ERIE
$13.7B
| $1.08M | ﹤0.01% |
+3,100
| New | +$1.15M |
|
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.