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 | |
|---|---|---|---|---|---|---|
1626
Opko Health
OPK
$1.12B
| $2.42M | ﹤0.01% |
1,836,747
+190,972
| +12% | +$261K |
|
1627
CEMIG Preferred Shares
CIG
$5.69B
| $2.41M | ﹤0.01% |
1,231,128
+493,106
| +67% | +$902K |
|
1628
Janux Therapeutics
JANX
$1.14B
| $2.41M | ﹤0.01% |
+104,382
| New | +$2.75M |
|
1629
TMC The Metals Company
TMC
$2.19B
| $2.41M | ﹤0.01% |
364,818
+205,687
| +129% | +$789K |
|
1630
iRadimed
IRMD
$1.13B
| $2.41M | ﹤0.01% |
40,230
+21,223
| +112% | +$1.16M |
|
1631
Horizon Bancorp
HBNC
$1B
| $2.4M | ﹤0.01% |
156,362
+75,862
| +94% | +$1.11M |
|
|
ETW
1632
Eaton Vance Tax-Managed Global Buy-Write Opportunities Fund
ETW
$1.07B
| $2.39M | ﹤0.01% |
+276,464
| New | +$2.27M |
|
|
STEW
1633
SRH Total Return Fund
STEW
$1.78B
| $2.39M | ﹤0.01% |
+135,174
| New | +$2.32M |
|
1634
Oil-Dri
ODC
$1.33B
| $2.39M | ﹤0.01% |
40,504
+19,465
| +93% | +$945K |
|
1635
Heritage Insurance Holdings
HRTG
$1.01B
| $2.38M | ﹤0.01% |
95,532
-21,976
| -19% | -$469K |
|
1636
Lindblad Expeditions
LIND
$2.09B
| $2.38M | ﹤0.01% |
203,824
+60,335
| +42% | +$598K |
|
1637
Pultegroup
PHM
$24.8B
| $2.38M | ﹤0.01% |
+22,532
| New | +$2.27M |
|
1638
Banco Santander Chile
BSAC
$17B
| $2.37M | ﹤0.01% |
94,080
-40,100
| -30% | -$967K |
|
|
TIXT
1639
DELISTED
TELUS International
TIXT
| $2.37M | ﹤0.01% |
653,335
+319,832
| +96% | +$908K |
|
1640
Nuvation Bio
NUVB
$2.44B
| $2.37M | ﹤0.01% |
1,214,733
+527,355
| +77% | +$1.1M |
|
1641
Insteel Industries
IIIN
$587M
| $2.37M | ﹤0.01% |
63,583
+823
| +1% | +$27.5K |
|
|
PCG.PRX
1642
PG&E Corp 6.000% Series A Preferred Stock
PCG.PRX
$1.39B
| $2.37M | ﹤0.01% |
62,900
-1,110,717
| -95% | -$47.1M |
|
1643
Daktronics
DAKT
$919M
| $2.36M | ﹤0.01% |
155,905
+133,889
| +608% | +$1.84M |
|
|
CHPG
1644
ChampionsGate Acquisition Corp
CHPG
$105M
| $2.36M | ﹤0.01% |
+235,624
| New | +$2.36M |
|
|
BXMX
1645
DELISTED
Nuveen S&P 500 Buy-Write Income Fund
BXMX
| $2.35M | ﹤0.01% |
+169,380
| New | +$2.23M |
|
1646
Centuri Holdings
CTRI
$2.09B
| $2.35M | ﹤0.01% |
+104,710
| New | +$2.05M |
|
1647
SmartFinancial
SMBK
$871M
| $2.35M | ﹤0.01% |
69,516
+20,030
| +40% | +$618K |
|
|
SERV
1648
Serve Robotics
SERV
$419M
| $2.35M | ﹤0.01% |
205,206
-359,310
| -64% | -$3.16M |
|
1649
American States Water
AWR
$3.58B
| $2.35M | ﹤0.01% |
30,610
+20,266
| +196% | +$1.59M |
|
1650
Coca-Cola
KO
$394B
| $2.34M | ﹤0.01% |
33,122
-20,172
| -38% | -$1.44M |
|
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.