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 | |
|---|---|---|---|---|---|---|
1226
Walt Disney
DIS
$191B
| $4.43M | 0.01% |
35,700
+5,900
| +20% | +$613K |
|
1227
ACI Worldwide
ACIW
$5.29B
| $4.42M | 0.01% |
96,358
+91,946
| +2,084% | +$4.52M |
|
1228
Fortis
FTS
$28.3B
| $4.42M | 0.01% |
92,591
-75,507
| -45% | -$3.6M |
|
1229
Cavco Industries
CVCO
$4.48B
| $4.42M | 0.01% |
+10,170
| New | +$4.76M |
|
1230
Atmus Filtration Technologies
ATMU
$3.93B
| $4.42M | 0.01% |
121,310
-42,995
| -26% | -$1.53M |
|
1231
CDW
CDW
$16.6B
| $4.42M | 0.01% |
24,738
+2,098
| +9% | +$356K |
|
1232
Ford
F
$55.5B
| $4.4M | 0.01% |
405,100
-11,098,594
| -96% | -$113M |
|
1233
Koppers
KOP
$867M
| $4.39M | 0.01% |
136,578
+2,640
| +2% | +$75.8K |
|
1234
Incyte
INCY
$25.9B
| $4.38M | 0.01% |
64,349
+7,364
| +13% | +$467K |
|
|
CHCT
1235
Community Healthcare Trust
CHCT
$434M
| $4.37M | 0.01% |
262,920
-34,761
| -12% | -$573K |
|
|
AAUC
1236
Allied Gold Corp
AAUC
$3.25B
| $4.37M | 0.01% |
+323,033
| New | +$4.57M |
|
1237
Kelly Services Class A
KELYA
$583M
| $4.37M | 0.01% |
372,958
+26,069
| +8% | +$307K |
|
1238
Heritage Financial
HFWA
$1.19B
| $4.36M | 0.01% |
182,981
+53,486
| +41% | +$1.23M |
|
1239
Saratoga Investment
SAR
$297M
| $4.36M | 0.01% |
175,840
-60,027
| -25% | -$1.45M |
|
1240
Nucor
NUE
$55.5B
| $4.36M | 0.01% |
33,657
+9,276
| +38% | +$1.08M |
|
1241
Washington Trust Bancorp
WASH
$758M
| $4.36M | 0.01% |
154,067
+56,780
| +58% | +$1.58M |
|
1242
Leidos
LDOS
$17.4B
| $4.35M | 0.01% |
27,600
-424,949
| -94% | -$62.8M |
|
|
WBA
1243
DELISTED
Walgreens Boots Alliance
WBA
| $4.35M | 0.01% |
378,666
-735,337
| -66% | -$8.19M |
|
1244
Toll Brothers
TOL
$13.6B
| $4.34M | 0.01% |
+38,045
| New | +$3.95M |
|
1245
PNC Financial Services
PNC
$97.2B
| $4.34M | 0.01% |
23,268
-279,401
| -92% | -$47.3M |
|
1246
PUT
PG&E
PCG
$39.9B
| $4.33M | 0.01% |
310,800
| – | – |
|
1247
Applied Materials
AMAT
$384B
| $4.32M | 0.01% |
23,600
-886,580
| -97% | -$140M |
|
1248
Seneca Foods Class A
SENEA
$1.28B
| $4.31M | 0.01% |
42,475
+31,482
| +286% | +$2.83M |
|
1249
Bread Financial
BFH
$4.04B
| $4.3M | 0.01% |
75,217
-69,783
| -48% | -$3.52M |
|
1250
Amerant Bancorp
AMTB
$1.13B
| $4.29M | 0.01% |
235,457
+49,325
| +27% | +$876K |
|
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.