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 | |
|---|---|---|---|---|---|---|
776
PUT
Century Aluminum
CENX
$4.32B
| $9.77M | 0.02% |
542,200
| – | – |
|
|
PRMB
777
Primo Brands
PRMB
$8.33B
| $9.76M | 0.02% |
329,543
-330,776
| -50% | -$10.6M |
|
778
QuantumScape Corp
QS
$3.52B
| $9.75M | 0.02% |
+1,451,357
| New | +$6.13M |
|
779
iShares US Healthcare ETF
IYH
$3.82B
| $9.74M | 0.02% |
172,487
+151,600
| +726% | +$8.55M |
|
780
PennantPark Floating Rate Capital
PFLT
$740M
| $9.74M | 0.02% |
942,801
-797,046
| -46% | -$8.07M |
|
|
CRWV
781
CoreWeave
CRWV
$47.6B
| $9.74M | 0.02% |
59,720
+53,220
| +819% | +$4.91M |
|
782
Fidelity MSCI Health Care Index ETF
FHLC
$3.54B
| $9.73M | 0.02% |
152,200
+147,600
| +3,209% | +$9.4M |
|
783
iShares US Equity Factor ETF
LRGF
$3.68B
| $9.73M | 0.02% |
+151,700
| New | +$9M |
|
784
iShares MSCI Japan ETF
EWJ
$22.4B
| $9.71M | 0.02% |
+129,500
| New | +$9.21M |
|
785
ArcelorMittal
MT
$54.8B
| $9.7M | 0.02% |
307,029
-313,308
| -51% | -$9.26M |
|
786
EPR Properties
EPR
$4.64B
| $9.7M | 0.02% |
166,410
-36,183
| -18% | -$1.91M |
|
787
VEON
VEON
$4.21B
| $9.69M | 0.02% |
210,273
+191,932
| +1,046% | +$8.83M |
|
788
Avista
AVA
$3.18B
| $9.66M | 0.02% |
254,655
-47,306
| -16% | -$1.87M |
|
|
DOO
789
Bombardier Recreational Products
DOO
$4.68B
| $9.65M | 0.02% |
199,050
+189,022
| +1,885% | +$7.46M |
|
790
KBR
KBR
$4.75B
| $9.62M | 0.02% |
200,632
-428,380
| -68% | -$22.2M |
|
791
Inter&Co
INTR
$2.45B
| $9.62M | 0.02% |
1,294,390
+393,170
| +44% | +$2.61M |
|
792
Comfort Systems
FIX
$56.7B
| $9.61M | 0.02% |
17,922
-165,129
| -90% | -$71.9M |
|
793
Legend Biotech
LEGN
$4.07B
| $9.57M | 0.02% |
269,701
-532,080
| -66% | -$17.2M |
|
794
Olin
OLN
$2B
| $9.57M | 0.02% |
476,354
-338,001
| -42% | -$7.02M |
|
795
Beam Therapeutics
BEAM
$2.93B
| $9.55M | 0.02% |
561,521
+192,320
| +52% | +$3.35M |
|
796
PUT
Equinox Gold
EQX
$16.1B
| $9.51M | 0.02% |
1,654,500
| – | – |
|
797
Main Street Capital
MAIN
$5.51B
| $9.51M | 0.02% |
160,899
-14,100
| -8% | -$779K |
|
798
Kura Sushi USA
KRUS
$603M
| $9.51M | 0.02% |
110,456
-2,098
| -2% | -$138K |
|
799
MannKind Corp
MNKD
$1.31B
| $9.45M | 0.02% |
2,525,996
-832,624
| -25% | -$3.67M |
|
800
W.P. Carey
WPC
$16.3B
| $9.44M | 0.02% |
151,352
-103,466
| -41% | -$6.37M |
|
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.