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 | |
|---|---|---|---|---|---|---|
2426
Chevron
CVX
$398B
| $602K | ﹤0.01% |
4,206
-4,161
| -50% | -$587K |
|
2427
Virgin Galactic
SPCE
$455M
| $602K | ﹤0.01% |
220,515
+190,890
| +644% | +$584K |
|
2428
Invesco S&P 500 Equal Weight Financials ETF
RSPF
$317M
| $601K | ﹤0.01% |
+7,900
| New | +$564K |
|
|
NSLR
2429
Neostellar Capital Corp
NSLR
$261M
| $600K | ﹤0.01% |
73,087
+59,490
| +438% | +$354K |
|
|
SILA
2430
DELISTED
Sila Realty Trust
SILA
| $599K | ﹤0.01% |
25,299
-98,492
| -80% | -$2.48M |
|
|
ABFL
2431
Abacus FCF Leaders ETF
ABFL
$535M
| $594K | ﹤0.01% |
+8,400
| New | +$557K |
|
|
HNGE
2432
Hinge Health
HNGE
$7.26B
| $593K | ﹤0.01% |
+11,465
| New | +$463K |
|
2433
Enanta Pharmaceuticals
ENTA
$411M
| $593K | ﹤0.01% |
78,455
+565
| +0.7% | +$3.4K |
|
2434
The Honest Company
HNST
$558M
| $593K | ﹤0.01% |
116,525
-170,183
| -59% | -$816K |
|
2435
SES AI
SES
$200M
| $593K | ﹤0.01% |
667,406
+32,303
| +5% | +$27.1K |
|
2436
Viemed Healthcare
VMD
$346M
| $592K | ﹤0.01% |
85,613
+6,830
| +9% | +$46.4K |
|
2437
First Trust US Equity Opportunities ETF
FPX
$1.48B
| $590K | ﹤0.01% |
+4,070
| New | +$517K |
|
2438
Fresenius Medical Care
FMS
$12.5B
| $590K | ﹤0.01% |
20,642
-4,171
| -17% | -$112K |
|
2439
Five Point Holdings
FPH
$371M
| $589K | ﹤0.01% |
107,131
-38,330
| -26% | -$205K |
|
2440
QuinStreet
QNST
$1.18B
| $588K | ﹤0.01% |
+36,500
| New | +$585K |
|
|
ETB
2441
Eaton Vance Tax-Managed Buy-Write Income Fund
ETB
$457M
| $583K | ﹤0.01% |
+40,366
| New | +$549K |
|
2442
Amkor Technology
AMKR
$11.9B
| $582K | ﹤0.01% |
27,742
-107,867
| -80% | -$1.99M |
|
2443
iShares US Consumer Staples ETF
IYK
$1.44B
| $578K | ﹤0.01% |
+8,200
| New | +$578K |
|
2444
Medallion Financial
MFIN
$267M
| $577K | ﹤0.01% |
60,543
-26,091
| -30% | -$237K |
|
2445
Castle Biosciences
CSTL
$1.02B
| $577K | ﹤0.01% |
28,241
-111,544
| -80% | -$2.07M |
|
|
JHG
2446
DELISTED
Janus Henderson
JHG
| $577K | ﹤0.01% |
14,843
-184,823
| -93% | -$6.51M |
|
2447
US Physical Therapy
USPH
$1.15B
| $576K | ﹤0.01% |
7,360
-29,625
| -80% | -$2.18M |
|
2448
Cognyte Software
CGNT
$631M
| $575K | ﹤0.01% |
62,200
+35,156
| +130% | +$346K |
|
2449
iShares Silver Trust
SLV
$33.5B
| $571K | ﹤0.01% |
17,416
+8,222
| +89% | +$251K |
|
|
STLN
2450
Starling Oncology
STLN
$625M
| $570K | ﹤0.01% |
+278,165
| New | +$695K |
|
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.