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 | |
|---|---|---|---|---|---|---|
|
DEC
1251
Diversified Energy Company
DEC
$1.05B
| $4.29M | 0.01% |
292,439
+173,290
| +145% | +$2.32M |
|
|
REVG
1252
DELISTED
REV Group
REVG
| $4.29M | 0.01% |
+90,100
| New | +$3.35M |
|
1253
Twist Bioscience
TWST
$8.83B
| $4.27M | 0.01% |
115,955
-24,721
| -18% | -$854K |
|
|
GLDD
1254
DELISTED
Great Lakes Dredge & Dock
GLDD
| $4.25M | 0.01% |
348,820
+237,834
| +214% | +$2.47M |
|
1255
Aaon
AAON
$6.27B
| $4.25M | 0.01% |
57,655
+31,385
| +119% | +$2.75M |
|
1256
Edwards Lifesciences
EW
$52.2B
| $4.25M | 0.01% |
54,363
-42,740
| -44% | -$3.19M |
|
|
PR
1257
Permian Resources
PR
$19.8B
| $4.25M | 0.01% |
311,779
+292,649
| +1,530% | +$3.76M |
|
1258
iShares MSCI Germany ETF
EWG
$1.72B
| $4.24M | 0.01% |
100,300
+75,700
| +308% | +$3.02M |
|
|
CTO
1259
CTO Realty Growth
CTO
$825M
| $4.24M | 0.01% |
245,648
-58,239
| -19% | -$1.05M |
|
|
CYBR
1260
DELISTED
CyberArk
CYBR
| $4.24M | 0.01% |
10,418
-164,764
| -94% | -$60M |
|
|
BRFS
1261
DELISTED
BRF SA
BRFS
| $4.24M | 0.01% |
1,161,122
-745,929
| -39% | -$2.7M |
|
1262
Rocket Pharmaceuticals
RCKT
$388M
| $4.23M | 0.01% |
+1,725,360
| New | +$8.74M |
|
1263
Keysight
KEYS
$52.9B
| $4.23M | 0.01% |
25,794
+5,771
| +29% | +$880K |
|
|
CIM
1264
Chimera Investment
CIM
$973M
| $4.22M | 0.01% |
304,422
-305,994
| -50% | -$3.91M |
|
|
NVMI
1265
Nova
NVMI
$11.5B
| $4.22M | 0.01% |
15,324
-54,602
| -78% | -$11.1M |
|
|
SDHI
1266
Siddhi Acquisition Corp
SDHI
$366M
| $4.2M | 0.01% |
+415,579
| New | +$4.2M |
|
1267
HF Sinclair
DINO
$16.9B
| $4.2M | 0.01% |
102,223
-98,085
| -49% | -$3.38M |
|
|
FOLD
1268
DELISTED
Amicus Therapeutics
FOLD
| $4.2M | 0.01% |
732,735
-660,034
| -47% | -$4.26M |
|
1269
Carrier Global
CARR
$49.4B
| $4.2M | 0.01% |
57,325
-233,303
| -80% | -$15.8M |
|
1270
Raymond James Financial
RJF
$34B
| $4.19M | 0.01% |
27,338
-29,797
| -52% | -$4.27M |
|
1271
HealthStream
HSTM
$842M
| $4.19M | 0.01% |
151,503
+96,982
| +178% | +$2.87M |
|
1272
RUM Group Inc
RUM
$4.64B
| $4.19M | 0.01% |
466,710
-109,065
| -19% | -$932K |
|
1273
Weatherford International
WFRD
$6.36B
| $4.19M | 0.01% |
83,196
+25,771
| +45% | +$1.2M |
|
1274
Matsons
MATX
$6.66B
| $4.18M | 0.01% |
37,578
-75,639
| -67% | -$8.28M |
|
|
CSGS
1275
DELISTED
CSG Systems International
CSGS
| $4.18M | 0.01% |
64,039
-28,368
| -31% | -$1.77M |
|
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.