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 | |
|---|---|---|---|---|---|---|
1026
OSI Systems
OSIS
$3.36B
| $6.4M | 0.01% |
+28,448
| New | +$6.07M |
|
|
ACH
1027
Accendra Health
ACH
$89.2M
| $6.39M | 0.01% |
702,718
+315,473
| +81% | +$2.32M |
|
|
DFUS
1028
Dimensional US Equity ETF
DFUS
$21.4B
| $6.38M | 0.01% |
+95,200
| New | +$5.9M |
|
|
1029
Advanced Micro Devices
AMD
$746B
| $6.38M | 0.01% |
44,928
-2,202,024
| -98% | -$240M |
|
|
BACCU
1030
Blue Acquisition Corp Unit
BACCU
| $6.37M | 0.01% |
+634,375
| New | +$6.38M |
|
1031
COPT Defense Properties
CDP
$4.25B
| $6.37M | 0.01% |
230,866
+109,950
| +91% | +$2.98M |
|
|
PNNT
1032
Pennant Park Investment Corp
PNNT
$246M
| $6.35M | 0.01% |
928,171
-38,756
| -4% | -$256K |
|
1033
Tecnoglass Holdings
TGLS
$1.8B
| $6.35M | 0.01% |
82,052
-6,899
| -8% | -$535K |
|
1034
Petco
WOOF
$822M
| $6.34M | 0.01% |
2,238,640
-510,457
| -19% | -$1.59M |
|
1035
Delta Air Lines
DAL
$54.2B
| $6.32M | 0.01% |
128,406
-91,562
| -42% | -$4.2M |
|
1036
John B. Sanfilippo & Son
JBSS
$882M
| $6.31M | 0.01% |
99,749
+24,579
| +33% | +$1.58M |
|
1037
MYR Group
MYRG
$4.75B
| $6.27M | 0.01% |
34,531
-52,546
| -60% | -$7.72M |
|
|
MRUS
1038
DELISTED
Merus
MRUS
| $6.26M | 0.01% |
119,094
-206,767
| -63% | -$9.72M |
|
|
HTO
1039
H2O America
HTO
$2.7B
| $6.23M | 0.01% |
119,956
+103,745
| +640% | +$5.52M |
|
1040
Green Dot
GDOT
$765M
| $6.23M | 0.01% |
577,851
+42,766
| +8% | +$386K |
|
1041
Ameriprise Financial
AMP
$49.6B
| $6.23M | 0.01% |
+11,671
| New | +$5.77M |
|
1042
iShares Russell Top 200 ETF
IWL
$2.24B
| $6.22M | 0.01% |
+40,600
| New | +$5.72M |
|
1043
DTE Energy
DTE
$28.2B
| $6.21M | 0.01% |
46,898
+3,839
| +9% | +$516K |
|
1044
Invesco MSCI USA ETF
PBUS
$11.7B
| $6.21M | 0.01% |
+99,900
| New | +$5.74M |
|
1045
Global X Cloud Computing ETF
CLOU
$368M
| $6.21M | 0.01% |
266,200
+89,900
| +51% | +$1.97M |
|
|
ODP
1046
DELISTED
ODP
ODP
| $6.2M | 0.01% |
341,716
+136,079
| +66% | +$2.13M |
|
1047
Knife River
KNF
$3.61B
| $6.18M | 0.01% |
75,752
+20,423
| +37% | +$1.86M |
|
1048
Cleveland-Cliffs
CLF
$6.45B
| $6.18M | 0.01% |
812,923
+278,595
| +52% | +$2.07M |
|
|
HIMX
1049
Himax Technologies
HIMX
$2.34B
| $6.18M | 0.01% |
691,537
-363,851
| -34% | -$2.86M |
|
1050
Toronto Dominion Bank
TD
$193B
| $6.17M | 0.01% |
84,010
+28,010
| +50% | +$1.83M |
|
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.