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 | |
|---|---|---|---|---|---|---|
|
CVGW
2651
DELISTED
Calavo Growers
CVGW
| $353K | ﹤0.01% |
13,291
+2,567
| +24% | +$67.1K |
|
2652
AXT Inc
AXTI
$4.29B
| $352K | ﹤0.01% |
168,440
-94,341
| -36% | -$147K |
|
2653
First Trust Small Cap Core AlphaDEX Fund
FYX
$1.39B
| $350K | ﹤0.01% |
3,600
-5,300
| -60% | -$480K |
|
2654
Burford Capital
BUR
$946M
| $349K | ﹤0.01% |
+24,500
| New | +$320K |
|
2655
Artisan Partners
APAM
$3.05B
| $349K | ﹤0.01% |
7,879
-2,765
| -26% | -$110K |
|
|
AIV
2656
Aimco
AIV
$378M
| $349K | ﹤0.01% |
40,348
-116,287
| -74% | -$941K |
|
|
RAPT
2657
DELISTED
RAPT Therapeutics
RAPT
| $349K | ﹤0.01% |
43,621
-3,130
| -7% | -$23.9K |
|
2658
Pacer Lunt MidCap Multi-Factor Alternator ETF
PAMC
$54.5M
| $346K | ﹤0.01% |
+7,900
| New | +$331K |
|
2659
Alpha Teknova
TKNO
$394M
| $346K | ﹤0.01% |
+70,498
| New | +$415K |
|
|
TBI
2660
Trueblue
TBI
$325M
| $345K | ﹤0.01% |
53,274
-3,765
| -7% | -$20.3K |
|
|
HEQ
2661
John Hancock Hedged Equity & Income Fund
HEQ
$143M
| $345K | ﹤0.01% |
+32,587
| New | +$336K |
|
2662
Agilysys
AGYS
$3.21B
| $344K | ﹤0.01% |
3,002
-39,457
| -93% | -$3.56M |
|
|
SLN
2663
Silence Therapeutics
SLN
$826M
| $344K | ﹤0.01% |
59,312
-16,696
| -22% | -$71.6K |
|
2664
Winmark
WINA
$1.26B
| $344K | ﹤0.01% |
+911
| New | +$352K |
|
|
SJT
2665
San Juan Basin Royalty Trust
SJT
$130M
| $342K | ﹤0.01% |
57,160
-35,174
| -38% | -$214K |
|
2666
InfuSystem Holdings
INFU
$238M
| $342K | ﹤0.01% |
54,776
-511
| -0.9% | -$2.82K |
|
2667
CareCloud
CCLD
$106M
| $340K | ﹤0.01% |
144,192
+24,101
| +20% | +$45.8K |
|
2668
California Water Service
CWT
$3.14B
| $340K | ﹤0.01% |
+7,476
| New | +$358K |
|
2669
Noble Corp
NE
$7.34B
| $340K | ﹤0.01% |
+12,798
| New | +$307K |
|
|
HLVX
2670
DELISTED
HilleVax
HLVX
| $339K | ﹤0.01% |
170,209
+79,494
| +88% | +$145K |
|
2671
American Well
AMWL
$203M
| $336K | ﹤0.01% |
37,776
+27,571
| +270% | +$197K |
|
2672
Blue Ridge Bankshares
BRBS
$352M
| $335K | ﹤0.01% |
93,270
-84,028
| -47% | -$283K |
|
|
AUTL
2673
Autolus Therapeutics
AUTL
$623M
| $335K | ﹤0.01% |
146,797
-248,646
| -63% | -$411K |
|
2674
Target Hospitality
TH
$1.78B
| $335K | ﹤0.01% |
47,002
+178
| +0.4% | +$1.24K |
|
2675
Cadre Holdings
CDRE
$1.42B
| $334K | ﹤0.01% |
10,491
-7,042
| -40% | -$228K |
|
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.