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 | |
|---|---|---|---|---|---|---|
626
JPMorgan BetaBuilders US Equity ETF
BBUS
$9.13B
| $14.3M | 0.03% |
+127,900
| New | +$13.2M |
|
627
Asana
ASAN
$2.22B
| $14.2M | 0.03% |
1,054,017
-303,094
| -22% | -$4.75M |
|
628
Charles River Laboratories
CRL
$14B
| $14.2M | 0.03% |
93,674
-69,669
| -43% | -$9.29M |
|
629
JPMorgan US Quality Factor ETF
JQUA
$8.65B
| $14.2M | 0.03% |
+236,500
| New | +$13.5M |
|
630
Pitney Bowes
PBI
$2.28B
| $14.2M | 0.03% |
1,301,477
+400,022
| +44% | +$3.76M |
|
631
WisdomTree
WT
$3.56B
| $14.2M | 0.03% |
1,231,705
-355,772
| -22% | -$3.33M |
|
632
AbCellera Biologics
ABCL
$3.44B
| $14.1M | 0.03% |
4,110,852
+984,063
| +31% | +$2.45M |
|
633
Fiverr
FVRR
$330M
| $14.1M | 0.02% |
479,416
+153,215
| +47% | +$4.41M |
|
634
Cellebrite
CLBT
$2.8B
| $14.1M | 0.02% |
878,718
-142,554
| -14% | -$2.54M |
|
635
Aegon
AEG
$13.6B
| $14M | 0.02% |
1,937,433
+1,730,152
| +835% | +$11.6M |
|
636
Parker-Hannifin
PH
$127B
| $13.8M | 0.02% |
19,749
+11,522
| +140% | +$7.28M |
|
637
National Health Investors
NHI
$3.61B
| $13.8M | 0.02% |
196,643
+75,701
| +63% | +$5.55M |
|
|
EMBJ
638
Embraer S.A. ADS
EMBJ
$13.4B
| $13.7M | 0.02% |
241,308
-408,429
| -63% | -$19.3M |
|
639
Waters Corp
WAT
$39.9B
| $13.7M | 0.02% |
39,314
-53,960
| -58% | -$18.6M |
|
640
Aflac
AFL
$59.1B
| $13.7M | 0.02% |
+130,008
| New | +$13.7M |
|
641
International Paper
IP
$22.1B
| $13.7M | 0.02% |
292,466
-858,135
| -75% | -$40.6M |
|
642
Iris Energy
IREN
$14.3B
| $13.6M | 0.02% |
935,609
+605,298
| +183% | +$4.92M |
|
643
Travere Therapeutics
TVTX
$6.08B
| $13.6M | 0.02% |
918,713
+149,919
| +20% | +$2.48M |
|
644
Immunocore
IMCR
$1.87B
| $13.6M | 0.02% |
433,065
+127,701
| +42% | +$3.97M |
|
|
GPGI
645
GPGI Inc
GPGI
$3.66B
| $13.6M | 0.02% |
962,340
+19,006
| +2% | +$233K |
|
646
AtriCure
ATRC
$2.51B
| $13.5M | 0.02% |
411,913
-256,012
| -38% | -$8.32M |
|
647
Fluence Energy
FLNC
$1.55B
| $13.5M | 0.02% |
2,007,466
+283,485
| +16% | +$1.35M |
|
648
Xylem
XYL
$26.8B
| $13.5M | 0.02% |
104,114
+34,839
| +50% | +$4.22M |
|
649
Hertz
HTZ
$823M
| $13.4M | 0.02% |
1,966,578
+1,527,020
| +347% | +$9.53M |
|
650
Invesco Russell 1000 Dynamic Multifactor ETF
OMFL
$4.82B
| $13.4M | 0.02% |
+232,200
| New | +$12.7M |
|
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.