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 | |
|---|---|---|---|---|---|---|
|
INFA
1126
DELISTED
Informatica
INFA
| $5.31M | 0.01% |
217,992
-558,481
| -72% | -$11.5M |
|
1127
DoubleVerify
DV
$2.06B
| $5.3M | 0.01% |
354,072
+171,324
| +94% | +$2.35M |
|
1128
First Bancorp
FBP
$4.31B
| $5.29M | 0.01% |
253,848
+39,782
| +19% | +$782K |
|
1129
FB Financial Corp
FBK
$2.91B
| $5.28M | 0.01% |
116,568
+76,485
| +191% | +$3.32M |
|
1130
Employers Holdings
EIG
$883M
| $5.28M | 0.01% |
111,850
+61,097
| +120% | +$2.95M |
|
1131
Fortrea Holdings
FTRE
$1.74B
| $5.28M | 0.01% |
1,067,892
+668,483
| +167% | +$3.59M |
|
1132
Pennant Group
PNTG
$1.36B
| $5.27M | 0.01% |
176,388
+95,472
| +118% | +$2.62M |
|
|
CUB
1133
Lionheart Holdings
CUB
$284M
| $5.25M | 0.01% |
500,000
| – | – |
|
|
ALDF
1134
Aldel Financial II Inc
ALDF
$322M
| $5.25M | 0.01% |
500,000
| – | – |
|
|
TONT
1135
Graf Global Corp
TONT
$154M
| $5.23M | 0.01% |
500,000
| – | – |
|
1136
Syndax Pharmaceuticals
SNDX
$1.75B
| $5.22M | 0.01% |
556,971
-223,038
| -29% | -$2.45M |
|
|
SIMA
1137
SIM Acquisition Corp I
SIMA
$90M
| $5.21M | 0.01% |
500,000
| – | – |
|
|
LPBB
1138
Launch Two Acquisition Corp
LPBB
$310M
| $5.21M | 0.01% |
500,000
| – | – |
|
|
LPAA
1139
Launch One Acquisition Corp
LPAA
| $5.21M | 0.01% |
500,000
| – | – |
|
1140
Idexx Laboratories
IDXX
$44.1B
| $5.2M | 0.01% |
9,700
-24,639
| -72% | -$11.8M |
|
|
VCIC
1141
DELISTED
Vine Hill Capital Investment Corp
VCIC
| $5.2M | 0.01% |
500,000
| – | – |
|
|
OLO
1142
DELISTED
Olo Inc
OLO
| $5.19M | 0.01% |
583,451
-443,841
| -43% | -$3.44M |
|
1143
Ouster
OUST
$2.58B
| $5.19M | 0.01% |
+214,097
| New | +$2.6M |
|
|
POLE
1144
Andretti Acquisition Corp II
POLE
$320M
| $5.19M | 0.01% |
500,000
| – | – |
|
1145
Iridium Communications
IRDM
$5.01B
| $5.18M | 0.01% |
171,619
+110,182
| +179% | +$2.87M |
|
1146
Palomar
PLMR
$3.5B
| $5.17M | 0.01% |
33,497
+24,697
| +281% | +$3.82M |
|
1147
WesBanco
WSBC
$3.91B
| $5.16M | 0.01% |
163,268
-90,192
| -36% | -$2.73M |
|
1148
Barings BDC
BBDC
$989M
| $5.14M | 0.01% |
562,562
-169,727
| -23% | -$1.51M |
|
|
VTLE
1149
DELISTED
Vital Energy
VTLE
| $5.14M | 0.01% |
319,495
+173,905
| +119% | +$2.84M |
|
1150
AnaptysBio
ANAB
$1.73B
| $5.14M | 0.01% |
231,369
-34,489
| -13% | -$722K |
|
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.