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 | |
|---|---|---|---|---|---|---|
1976
Alexandria Real Estate Equities
ARE
$9.1B
| $1.41M | ﹤0.01% |
+19,365
| New | +$1.44M |
|
1977
Bar Harbor Bankshares
BHB
$660M
| $1.4M | ﹤0.01% |
46,828
+5,354
| +13% | +$157K |
|
1978
Safety Insurance
SAFT
$1.52B
| $1.4M | ﹤0.01% |
17,627
+11,416
| +184% | +$901K |
|
1979
Cardiff Oncology
CRDF
$79.4M
| $1.4M | ﹤0.01% |
443,521
+275,172
| +163% | +$839K |
|
1980
Granite Construction
GVA
$5.42B
| $1.39M | ﹤0.01% |
14,898
-81,607
| -85% | -$6.88M |
|
|
TALK
1981
DELISTED
Talkspace
TALK
| $1.39M | ﹤0.01% |
501,072
-177,838
| -26% | -$524K |
|
1982
Wolfspeed
WOLF
$1.31B
| $1.39M | ﹤0.01% |
3,492,139
+2,449,260
| +235% | +$5.58M |
|
1983
BlackRock Resources & Commodities Strategy Trust
BCX
$1.01B
| $1.39M | ﹤0.01% |
+147,166
| New | +$1.34M |
|
1984
OptimizeRx
OPRX
$148M
| $1.39M | ﹤0.01% |
102,745
+53,709
| +110% | +$588K |
|
|
HTB
1985
HomeTrust Bancshares
HTB
$771M
| $1.39M | ﹤0.01% |
37,077
+21
| +0.1% | +$738 |
|
1986
Texas Pacific Land
TPL
$25.7B
| $1.39M | ﹤0.01% |
3,936
+33
| +0.8% | +$13.5K |
|
1987
PUT
Etsy
ETSY
$7.75B
| $1.38M | ﹤0.01% |
27,600
+100
| +0.4% | +$4.97K |
|
1988
Cerus
CERS
$548M
| $1.38M | ﹤0.01% |
980,897
-11,664
| -1% | -$15.6K |
|
1989
Woodside Energy
WDS
$43.5B
| $1.38M | ﹤0.01% |
89,246
| – | – |
|
|
MRC
1990
DELISTED
MRC Global
MRC
| $1.37M | ﹤0.01% |
100,229
-110,069
| -52% | -$1.33M |
|
|
TDACU
1991
Translational Development Acquisition Corp Units
TDACU
| $1.37M | ﹤0.01% |
133,325
| – | – |
|
1992
Aurinia Pharmaceuticals
AUPH
$2.23B
| $1.37M | ﹤0.01% |
161,848
+54,960
| +51% | +$441K |
|
1993
Tanger
SKT
$4.42B
| $1.37M | ﹤0.01% |
+44,770
| New | +$1.37M |
|
1994
Bit Digital
BTBT
$570M
| $1.37M | ﹤0.01% |
623,865
+241,797
| +63% | +$534K |
|
1995
Aptus Collared Investment Opportunity ETF
ACIO
$2.41B
| $1.37M | ﹤0.01% |
+33,000
| New | +$1.3M |
|
|
JBTM
1996
JBT Marel
JBTM
$6.12B
| $1.37M | ﹤0.01% |
11,355
-1,120
| -9% | -$125K |
|
1997
HUB Group
HUBG
$2.4B
| $1.36M | ﹤0.01% |
40,782
-48,817
| -54% | -$1.64M |
|
|
BRDG
1998
DELISTED
Bridge Investment Group
BRDG
| $1.36M | ﹤0.01% |
135,800
-27,767
| -17% | -$259K |
|
1999
Unisys
UIS
$196M
| $1.36M | ﹤0.01% |
299,924
-116,664
| -28% | -$524K |
|
2000
Encore Capital Group
ECPG
$2.17B
| $1.35M | ﹤0.01% |
34,846
+11,572
| +50% | +$420K |
|
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.