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 | |
|---|---|---|---|---|---|---|
2526
Impinj
PI
$4.92B
| $480K | ﹤0.01% |
4,326
-44,579
| -91% | -$4.43M |
|
|
EFSI
2527
Eagle Financial Services Inc
EFSI
$227M
| $480K | ﹤0.01% |
+15,680
| New | +$484K |
|
2528
Mercer International
MERC
$26.9M
| $479K | ﹤0.01% |
136,913
-126,758
| -48% | -$525K |
|
2529
Regional Management Corp
RM
$319M
| $479K | ﹤0.01% |
16,382
-17,950
| -52% | -$522K |
|
2530
MKS Inc
MKSI
$18.2B
| $477K | ﹤0.01% |
+4,800
| New | +$390K |
|
|
SGMO
2531
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $475K | ﹤0.01% |
877,079
+90,334
| +11% | +$53.6K |
|
2532
Adecoagro
AGRO
$1.62B
| $474K | ﹤0.01% |
51,908
+29,747
| +134% | +$290K |
|
2533
iShares MSCI Brazil ETF
EWZ
$8.07B
| $474K | ﹤0.01% |
+16,423
| New | +$443K |
|
2534
State Street SPDR FactSet Innovative Technology ETF
XITK
$69.1M
| $473K | ﹤0.01% |
+2,500
| New | +$427K |
|
|
CWBC
2535
Community West Bancshares
CWBC
$706M
| $472K | ﹤0.01% |
24,205
+1,139
| +5% | +$20.2K |
|
2536
Baker Hughes
BKR
$61.5B
| $472K | ﹤0.01% |
12,300
| – | – |
|
2537
Innoviz Technologies
INVZ
$101M
| $470K | ﹤0.01% |
+286,437
| New | +$250K |
|
2538
Ooma
OOMA
$584M
| $468K | ﹤0.01% |
36,307
-13,332
| -27% | -$170K |
|
|
PVBC
2539
DELISTED
Provident Bancorp
PVBC
| $467K | ﹤0.01% |
37,386
+14,625
| +64% | +$166K |
|
2540
Lindsay Corp
LNN
$1.18B
| $466K | ﹤0.01% |
3,232
-468
| -13% | -$62.5K |
|
2541
AngioDynamics
ANGO
$652M
| $465K | ﹤0.01% |
46,915
-80,536
| -63% | -$788K |
|
2542
BBB Foods
TBBB
$6.13B
| $464K | ﹤0.01% |
16,697
-38,471
| -70% | -$1.08M |
|
2543
Invesco S&P SmallCap 600 Pure Value ETF
RZV
$302M
| $461K | ﹤0.01% |
4,400
-12,100
| -73% | -$1.17M |
|
2544
First Trust Horizon Managed Volatility Domestic ETF
HUSV
$84.6M
| $459K | ﹤0.01% |
+11,500
| New | +$453K |
|
2545
Korro Bio
KRRO
$192M
| $459K | ﹤0.01% |
+36,746
| New | +$529K |
|
2546
BrightView Holdings
BV
$1.01B
| $458K | ﹤0.01% |
27,533
-27,442
| -50% | -$410K |
|
2547
Ranger Energy Services
RNGR
$375M
| $458K | ﹤0.01% |
38,335
-4,529
| -11% | -$54.4K |
|
2548
ProQR Therapeutics
PRQR
$343M
| $457K | ﹤0.01% |
224,040
-77,872
| -26% | -$127K |
|
|
RPT
2549
Rithm Property Trust
RPT
$102M
| $457K | ﹤0.01% |
28,191
-9,831
| -26% | -$160K |
|
2550
ALPS Dynamic US Dividend Advantage ETF
RFDA
$83.1M
| $454K | ﹤0.01% |
7,826
+426
| +6% | +$22.8K |
|
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.