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 | |
|---|---|---|---|---|---|---|
2601
Surgery Partners
SGRY
$1.83B
| $398K | ﹤0.01% |
17,897
-9,800
| -35% | -$218K |
|
2602
Olema Pharmaceuticals
OLMA
$913M
| $394K | ﹤0.01% |
92,501
+29,575
| +47% | +$132K |
|
|
ABX
2603
Abacus Global Management
ABX
$940M
| $394K | ﹤0.01% |
76,591
+5,957
| +8% | +$44K |
|
2604
J. Jill
JILL
$299M
| $393K | ﹤0.01% |
26,877
-12,100
| -31% | -$191K |
|
|
BCYC
2605
Bicycle Therapeutics
BCYC
$303M
| $391K | ﹤0.01% |
+56,198
| New | +$448K |
|
2606
Graham Holdings Company
GHC
$4.98B
| $390K | ﹤0.01% |
412
-288
| -41% | -$271K |
|
2607
NextDecade
NEXT
$1.96B
| $388K | ﹤0.01% |
43,500
+10,551
| +32% | +$81.8K |
|
2608
Quanex
NX
$916M
| $386K | ﹤0.01% |
20,448
-24,028
| -54% | -$426K |
|
2609
Entravision Communication
EVC
$748M
| $386K | ﹤0.01% |
166,302
+28,670
| +21% | +$57.9K |
|
2610
Red Cat Holdings
RCAT
$1.36B
| $386K | ﹤0.01% |
52,992
-6,479
| -11% | -$42.3K |
|
2611
Civista Bancshares
CIVB
$573M
| $385K | ﹤0.01% |
16,577
-34,265
| -67% | -$745K |
|
2612
Flywire
FLYW
$2.36B
| $384K | ﹤0.01% |
32,853
+22,240
| +210% | +$227K |
|
2613
Digi International
DGII
$2.81B
| $384K | ﹤0.01% |
+11,007
| New | +$337K |
|
2614
Cabaletta Bio
CABA
$526M
| $384K | ﹤0.01% |
252,357
-69,054
| -21% | -$108K |
|
2615
KULR Technology Group
KULR
$119M
| $383K | ﹤0.01% |
53,735
+49,977
| +1,330% | +$474K |
|
2616
Tredegar Corp
TG
$278M
| $383K | ﹤0.01% |
43,502
-27,266
| -39% | -$220K |
|
2617
Lexicon Pharmaceuticals
LXRX
$1.03B
| $382K | ﹤0.01% |
+403,922
| New | +$262K |
|
2618
TriNet
TNET
$3.19B
| $382K | ﹤0.01% |
5,217
-106,194
| -95% | -$8.42M |
|
2619
Flotek Industries
FTK
$866M
| $381K | ﹤0.01% |
+25,806
| New | +$297K |
|
2620
Colterpoint Net Lease Real Estate ETF
NETL
$55.6M
| $381K | ﹤0.01% |
+15,600
| New | +$375K |
|
2621
West Bancorporation
WTBA
$485M
| $380K | ﹤0.01% |
+19,354
| New | +$374K |
|
2622
Movado Group
MOV
$772M
| $379K | ﹤0.01% |
+24,854
| New | +$380K |
|
2623
Associated Banc-Corp
ASB
$5.84B
| $379K | ﹤0.01% |
+15,523
| New | +$350K |
|
2624
Fidelity MSCI Consumer Staples Index ETF
FSTA
$1.45B
| $379K | ﹤0.01% |
+7,400
| New | +$379K |
|
|
EVRI
2625
DELISTED
Everi Holdings
EVRI
| $378K | ﹤0.01% |
26,554
-37
| -0.1% | -$517 |
|
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.