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 | |
|---|---|---|---|---|---|---|
|
GRMN
1851
Garmin
GRMN
$55.6B
| $1.77M | ﹤0.01% |
+8,461
| New | +$1.68M |
|
1852
Equitable Holdings
EQH
$13.3B
| $1.76M | ﹤0.01% |
31,388
-185,377
| -86% | -$9.53M |
|
1853
PUT
Arbor Realty Trust
ABR
$961M
| $1.75M | ﹤0.01% |
163,800
+14,000
| +9% | +$147K |
|
1854
Healthcare Services Group
HCSG
$1.57B
| $1.74M | ﹤0.01% |
115,703
-206,272
| -64% | -$2.73M |
|
1855
Midland States Bancorp
MSBI
$679M
| $1.74M | ﹤0.01% |
100,359
+41,975
| +72% | +$710K |
|
1856
Gladstone Capital
GLAD
$448M
| $1.74M | ﹤0.01% |
64,338
-53,513
| -45% | -$1.39M |
|
|
NUTX
1857
Nutex Health
NUTX
$1.29B
| $1.73M | ﹤0.01% |
+13,931
| New | +$1.8M |
|
1858
Denison Mines
DNN
$3.37B
| $1.73M | ﹤0.01% |
+947,878
| New | +$1.44M |
|
1859
Trinity Industries
TRN
$2.36B
| $1.72M | ﹤0.01% |
63,865
+50,783
| +388% | +$1.31M |
|
1860
Mercantile Bank Corp
MBWM
$1.04B
| $1.72M | ﹤0.01% |
37,165
-1,511
| -4% | -$65.4K |
|
1861
DigitalOcean
DOCN
$13.2B
| $1.72M | ﹤0.01% |
60,312
+23,635
| +64% | +$690K |
|
1862
Alpha Architect US Quantitative Momentum ETF
QMOM
$432M
| $1.72M | ﹤0.01% |
+26,500
| New | +$1.59M |
|
1863
International General Insurance
IGIC
$1.15B
| $1.71M | ﹤0.01% |
71,122
+19,972
| +39% | +$474K |
|
1864
Regenxbio
RGNX
$588M
| $1.71M | ﹤0.01% |
207,951
-118,757
| -36% | -$994K |
|
1865
Fidelity Fundamental Large Cap Core ETF
FFLC
$1.22B
| $1.71M | ﹤0.01% |
+34,900
| New | +$1.56M |
|
|
VSXY
1866
Victoria's Secret
VSXY
$6.94B
| $1.7M | ﹤0.01% |
91,769
-159,958
| -64% | -$3.13M |
|
1867
South Plains Financial
SPFI
$823M
| $1.69M | ﹤0.01% |
47,025
-1,685
| -3% | -$58K |
|
1868
Altimmune
ALT
$622M
| $1.69M | ﹤0.01% |
437,286
-710,530
| -62% | -$3.85M |
|
1869
First Financial Corp
THFF
$942M
| $1.69M | ﹤0.01% |
31,160
-5,093
| -14% | -$254K |
|
1870
Karooooo
KARO
$1.98B
| $1.69M | ﹤0.01% |
+34,421
| New | +$1.62M |
|
|
RIBB
1871
Ribbon Acquisition Corp
RIBB
$54.5M
| $1.68M | ﹤0.01% |
166,145
| – | – |
|
1872
Dakota Gold
DC
$857M
| $1.68M | ﹤0.01% |
455,374
+144,237
| +46% | +$451K |
|
|
GRDN
1873
Guardian Pharmacy Services
GRDN
$2.36B
| $1.68M | ﹤0.01% |
+78,724
| New | +$1.78M |
|
1874
Mitek Systems
MITK
$813M
| $1.68M | ﹤0.01% |
169,445
+42,101
| +33% | +$378K |
|
1875
Sana Biotechnology
SANA
$1.23B
| $1.67M | ﹤0.01% |
611,791
+504,305
| +469% | +$1.04M |
|
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.