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 | |
|---|---|---|---|---|---|---|
1501
Medifast
MED
$134M
| $2.9M | 0.01% |
206,120
-10,603
| -5% | -$139K |
|
1502
Myriad Genetics
MYGN
$292M
| $2.89M | 0.01% |
544,454
+529,954
| +3,655% | +$3.13M |
|
1503
Priority Technology Holdings
PRTH
$469M
| $2.88M | 0.01% |
370,313
+116,918
| +46% | +$878K |
|
1504
Werner Enterprises
WERN
$2.26B
| $2.88M | 0.01% |
105,195
-103,822
| -50% | -$2.84M |
|
|
CBL
1505
CBL Properties
CBL
$1.72B
| $2.87M | 0.01% |
113,178
-20,533
| -15% | -$506K |
|
1506
BWX Technologies
BWXT
$13.7B
| $2.87M | 0.01% |
19,934
-118,340
| -86% | -$13.8M |
|
|
HDSN
1507
Hudson Technologies
HDSN
$232M
| $2.87M | 0.01% |
353,279
-193,817
| -35% | -$1.33M |
|
1508
Morgan Stanley Direct Lending Fund
MSDL
$1.29B
| $2.87M | 0.01% |
153,199
-86,100
| -36% | -$1.66M |
|
|
BXBL
1509
BOXABL Inc
BXBL
$1.44B
| $2.87M | 0.01% |
+290,000
| New | +$2.82M |
|
1510
PJT Partners
PJT
$4.51B
| $2.86M | 0.01% |
17,330
-4,659
| -21% | -$677K |
|
1511
Cal-Maine
CALM
$3.95B
| $2.86M | 0.01% |
28,670
-129,761
| -82% | -$12.4M |
|
1512
YPF Sociedad Anonima ADS
YPF
$20.1B
| $2.85M | 0.01% |
90,711
-697,569
| -88% | -$23.3M |
|
1513
iShares US Tech Breakthrough Multisector ETF
TECB
$491M
| $2.85M | 0.01% |
49,700
+9,600
| +24% | +$497K |
|
1514
Vaxcyte
PCVX
$9.21B
| $2.85M | 0.01% |
+87,562
| New | +$2.87M |
|
|
HPP
1515
Hudson Pacific Properties
HPP
$798M
| $2.83M | 0.01% |
147,671
+14,996
| +11% | +$243K |
|
1516
Donnelley Financial Solutions
DFIN
$1.17B
| $2.83M | 0.01% |
45,922
-91,153
| -66% | -$4.7M |
|
1517
lululemon athletica
LULU
$13.9B
| $2.83M | 0.01% |
11,892
-348
| -3% | -$95.9K |
|
1518
Warner Music
WMG
$14.5B
| $2.82M | 0.01% |
103,549
-457,883
| -82% | -$12.8M |
|
|
WLAC
1519
DELISTED
Willow Lane Acquisition Corp
WLAC
| $2.81M | 0.01% |
275,000
| – | – |
|
1520
First Financial Bancorp
FFBC
$3.46B
| $2.81M | 0.01% |
115,953
+28,100
| +32% | +$667K |
|
1521
Vanguard US Minimum Volatility ETF
VFMV
$445M
| $2.81M | 0.01% |
21,900
+300
| +1% | +$37.4K |
|
1522
Teekay
TK
$1.17B
| $2.81M | 0.01% |
340,382
-32,608
| -9% | -$253K |
|
1523
MidCap Financial Investment
MFIC
$801M
| $2.81M | 0.01% |
222,459
+12,191
| +6% | +$150K |
|
1524
Manitowoc
MTW
$710M
| $2.81M | 0.01% |
233,552
-14,559
| -6% | -$143K |
|
1525
Invesco S&P SmallCap Low Volatility ETF
XSLV
$247M
| $2.79M | ﹤0.01% |
61,300
+25,000
| +69% | +$1.13M |
|
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.