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 | |
|---|---|---|---|---|---|---|
901
Terreno Realty
TRNO
$7.44B
| $7.96M | 0.01% |
142,013
-94,548
| -40% | -$5.41M |
|
902
MaxLinear
MXL
$5.97B
| $7.96M | 0.01% |
560,174
+37,155
| +7% | +$429K |
|
|
OKLO
903
Oklo
OKLO
$8.31B
| $7.96M | 0.01% |
142,161
+103,862
| +271% | +$4.01M |
|
904
Westamerica Bancorp
WABC
$1.34B
| $7.95M | 0.01% |
164,145
+73,982
| +82% | +$3.55M |
|
|
CEPO
905
Cantor Equity Partners I
CEPO
$275M
| $7.95M | 0.01% |
668,125
-56,875
| -8% | -$662K |
|
906
Ardelyx
ARDX
$989M
| $7.92M | 0.01% |
2,021,463
+1,011,325
| +100% | +$4.17M |
|
907
Western Alliance Bancorporation
WAL
$8.69B
| $7.92M | 0.01% |
101,504
+23,936
| +31% | +$1.72M |
|
908
OppFi
OPFI
$624M
| $7.91M | 0.01% |
565,295
+175,428
| +45% | +$1.97M |
|
909
New Mountain Finance
NMFC
$722M
| $7.89M | 0.01% |
747,973
-12,072
| -2% | -$124K |
|
910
IDT Corp
IDT
$1.71B
| $7.88M | 0.01% |
115,364
+39,978
| +53% | +$2.29M |
|
911
First Trust Exchange-Traded Fund VI First Trust Hedged BuyWrite Income ETF
FTQI
$945M
| $7.88M | 0.01% |
+402,800
| New | +$7.58M |
|
912
Adient
ADNT
$1.45B
| $7.87M | 0.01% |
404,207
+19,678
| +5% | +$291K |
|
913
Tyson Foods
TSN
$20.1B
| $7.86M | 0.01% |
140,535
-588,231
| -81% | -$33.8M |
|
914
PUT
Ormat Technologies
ORA
$6.58B
| $7.83M | 0.01% |
+93,500
| New | +$6.99M |
|
|
AAM
915
DELISTED
AA Mission Acquisition Corp
AAM
| $7.82M | 0.01% |
750,000
| – | – |
|
|
MLAC
916
DELISTED
Mountain Lake Acquisition Corp
MLAC
| $7.81M | 0.01% |
761,250
| – | – |
|
917
UWM Holdings
UWMC
$2.41B
| $7.78M | 0.01% |
1,879,307
-455,222
| -19% | -$2M |
|
918
KB Financial Group
KB
$42.3B
| $7.76M | 0.01% |
93,977
-46,249
| -33% | -$3.13M |
|
|
LOKV
919
DELISTED
Live Oak Acquisition Corp V
LOKV
| $7.76M | 0.01% |
+725,000
| New | +$7.47M |
|
|
FLG
920
Flagstar Bank National Association
FLG
$5.54B
| $7.75M | 0.01% |
731,104
+519,750
| +246% | +$5.94M |
|
921
AGCO
AGCO
$7.76B
| $7.74M | 0.01% |
75,058
-113,899
| -60% | -$10.9M |
|
|
CAEP
922
DELISTED
Cantor Equity Partners III
CAEP
| $7.74M | 0.01% |
+733,332
| New | +$7.72M |
|
923
Lowe's Companies
LOW
$121B
| $7.74M | 0.01% |
+34,863
| New | +$7.78M |
|
|
EFXT
924
Enerflex
EFXT
$2.41B
| $7.73M | 0.01% |
980,086
-244,487
| -20% | -$1.75M |
|
925
American Eagle Outfitters
AEO
$2.8B
| $7.73M | 0.01% |
803,428
+634,392
| +375% | +$6.81M |
|
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.