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 | |
|---|---|---|---|---|---|---|
2026
Crocs
CROX
$5.89B
| $1.29M | ﹤0.01% |
12,740
+2,978
| +31% | +$304K |
|
|
AMWD
2027
DELISTED
American Woodmark
AMWD
| $1.29M | ﹤0.01% |
24,168
+16,258
| +206% | +$918K |
|
2028
Bausch Health
BHC
$2.52B
| $1.29M | ﹤0.01% |
193,629
-49,660
| -20% | -$255K |
|
2029
Biglari Holdings Class B
BH
$1.21B
| $1.29M | ﹤0.01% |
+4,400
| New | +$1.07M |
|
|
GOOS
2030
Canada Goose Holdings
GOOS
$803M
| $1.28M | ﹤0.01% |
114,713
+51,059
| +80% | +$495K |
|
2031
Neuronetics
STIM
$227M
| $1.28M | ﹤0.01% |
367,764
-107,503
| -23% | -$424K |
|
2032
BlackRock Health Sciences Trust
BME
$597M
| $1.28M | ﹤0.01% |
+35,110
| New | +$1.27M |
|
2033
Vitesse Energy
VTS
$715M
| $1.28M | ﹤0.01% |
57,728
-55,025
| -49% | -$1.21M |
|
2034
Donegal Group Class A
DGICA
$710M
| $1.27M | ﹤0.01% |
63,554
-19,495
| -23% | -$378K |
|
2035
PAR Technology
PAR
$801M
| $1.27M | ﹤0.01% |
+18,342
| New | +$1.15M |
|
|
BRY
2036
DELISTED
Berry Corp
BRY
| $1.27M | ﹤0.01% |
458,123
+42,583
| +10% | +$114K |
|
2037
Crescent Capital BDC
CCAP
$394M
| $1.27M | ﹤0.01% |
89,989
-48,115
| -35% | -$738K |
|
2038
Zentalis Pharmaceuticals
ZNTL
$367M
| $1.27M | ﹤0.01% |
1,093,053
+543,719
| +99% | +$717K |
|
2039
Gilat Satellite Networks
GILT
$780M
| $1.27M | ﹤0.01% |
178,618
+138,721
| +348% | +$864K |
|
|
THS
2040
DELISTED
Treehouse Foods
THS
| $1.26M | ﹤0.01% |
64,979
-149,968
| -70% | -$3.36M |
|
2041
Appian
APPN
$2.84B
| $1.26M | ﹤0.01% |
+42,159
| New | +$1.27M |
|
2042
Live Oak Bancshares
LOB
$1.85B
| $1.26M | ﹤0.01% |
42,224
-51,850
| -55% | -$1.4M |
|
2043
Arrow Financial
AROW
$707M
| $1.26M | ﹤0.01% |
47,567
+13,109
| +38% | +$334K |
|
2044
Commerce Bancshares
CBSH
$8.35B
| $1.25M | ﹤0.01% |
21,100
-12,891
| -38% | -$756K |
|
|
BCAX
2045
Bicara Therapeutics
BCAX
$1.63B
| $1.25M | ﹤0.01% |
134,457
+121,687
| +953% | +$1.45M |
|
2046
Qfin Holdings
QFIN
$1.4B
| $1.24M | ﹤0.01% |
28,700
-64,600
| -69% | -$2.69M |
|
2047
James River Group Holdings
JRVR
$191M
| $1.24M | ﹤0.01% |
211,839
-71,735
| -25% | -$364K |
|
2048
Virtus Investment Partners
VRTS
$1.11B
| $1.24M | ﹤0.01% |
6,826
-3,331
| -33% | -$554K |
|
2049
Sony
SONY
$141B
| $1.24M | ﹤0.01% |
47,519
-74,481
| -61% | -$1.86M |
|
2050
Stratasys
SSYS
$693M
| $1.23M | ﹤0.01% |
+107,328
| New | +$1.09M |
|
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.