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 | |
|---|---|---|---|---|---|---|
|
NSA
1176
DELISTED
National Storage Affiliates Trust
NSA
| $4.92M | 0.01% |
153,656
+145,156
| +1,708% | +$5.07M |
|
1177
MGP Ingredients
MGPI
$384M
| $4.9M | 0.01% |
163,509
-128,552
| -44% | -$3.82M |
|
1178
SLR Investment Corp
SLRC
$693M
| $4.89M | 0.01% |
303,188
-22,877
| -7% | -$366K |
|
|
JACS
1179
Jackson Acquisition Co II
JACS
$318M
| $4.89M | 0.01% |
474,821
| – | – |
|
1180
Trade Desk
TTD
$6.24B
| $4.87M | 0.01% |
67,663
-122,561
| -64% | -$7.83M |
|
|
1181
Marvell Technology
MRVL
$206B
| $4.87M | 0.01% |
62,884
-3,868,803
| -98% | -$241M |
|
1182
TriMas Corp
TRS
$1.42B
| $4.86M | 0.01% |
169,901
-13,052
| -7% | -$320K |
|
1183
Alarm.com
ALRM
$2.83B
| $4.83M | 0.01% |
85,329
+45,104
| +112% | +$2.5M |
|
1184
nVent Electric
NVT
$24.8B
| $4.81M | 0.01% |
65,599
+19,155
| +41% | +$1.18M |
|
1185
Invesco Mortgage Capital
IVR
$805M
| $4.8M | 0.01% |
612,701
-352,843
| -37% | -$2.6M |
|
1186
Jazz Pharmaceuticals
JAZZ
$16.5B
| $4.79M | 0.01% |
45,112
-299,301
| -87% | -$32.5M |
|
1187
Simmons First National
SFNC
$3.32B
| $4.76M | 0.01% |
251,095
+75,730
| +43% | +$1.43M |
|
1188
Atkore
ATKR
$3.16B
| $4.74M | 0.01% |
67,241
-55,668
| -45% | -$3.61M |
|
1189
Edgewell Personal Care
EPC
$1.31B
| $4.7M | 0.01% |
200,946
+159,611
| +386% | +$4.42M |
|
1190
PUT
Northern Oil and Gas
NOG
$2.86B
| $4.69M | 0.01% |
165,300
-100,000
| -38% | -$2.69M |
|
1191
First Trust Financials AlphaDEX Fund
FXO
$1.13B
| $4.68M | 0.01% |
+83,400
| New | +$4.37M |
|
|
LEGT
1192
DELISTED
Legato Merger Corp III
LEGT
| $4.67M | 0.01% |
437,500
| – | – |
|
1193
Textron
TXT
$14.1B
| $4.66M | 0.01% |
58,025
-231,286
| -80% | -$16.7M |
|
1194
National Bank Holdings
NBHC
$1.86B
| $4.66M | 0.01% |
123,850
+43,376
| +54% | +$1.58M |
|
1195
Eagle Bancorp
EGBN
$857M
| $4.65M | 0.01% |
238,910
-26,500
| -10% | -$492K |
|
1196
Brunswick
BC
$5.26B
| $4.65M | 0.01% |
84,147
-43,324
| -34% | -$2.19M |
|
|
FFIC
1197
DELISTED
Flushing Financial
FFIC
| $4.63M | 0.01% |
389,979
-46,274
| -11% | -$558K |
|
1198
Kemper
KMPR
$1.63B
| $4.63M | 0.01% |
71,682
-13,694
| -16% | -$847K |
|
1199
iShares US Financial Services ETF
IYG
$2.23B
| $4.61M | 0.01% |
+53,900
| New | +$4.28M |
|
1200
Center Bancorp
CNOB
$1.62B
| $4.61M | 0.01% |
198,910
+7,180
| +4% | +$164K |
|
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.