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 | |
|---|---|---|---|---|---|---|
2451
GATX Corp
GATX
$6.3B
| $570K | ﹤0.01% |
3,713
-17,365
| -82% | -$2.6M |
|
|
NPB
2452
Northpointe Bancshares
NPB
$592M
| $570K | ﹤0.01% |
41,562
+13,023
| +46% | +$175K |
|
|
CSR
2453
Centerspace
CSR
$917M
| $569K | ﹤0.01% |
9,453
+839
| +10% | +$51.5K |
|
|
ZYXI
2454
DELISTED
Zynex
ZYXI
| $568K | ﹤0.01% |
220,070
+99,887
| +83% | +$226K |
|
2455
Gaotu Techedu
GOTU
$403M
| $567K | ﹤0.01% |
157,045
+19,232
| +14% | +$66K |
|
2456
Star Bulk Carriers
SBLK
$3.43B
| $566K | ﹤0.01% |
32,832
-173,912
| -84% | -$2.7M |
|
2457
Immersion
IMMR
$250M
| $566K | ﹤0.01% |
71,858
-35,118
| -33% | -$261K |
|
|
YMAB
2458
DELISTED
Y-mAbs Therapeutics
YMAB
| $565K | ﹤0.01% |
125,298
-29,487
| -19% | -$133K |
|
2459
Information Services Group
III
$241M
| $565K | ﹤0.01% |
117,679
-29,219
| -20% | -$126K |
|
2460
Funko
FNKO
$385M
| $562K | ﹤0.01% |
118,101
-127,593
| -52% | -$582K |
|
2461
Nature's Sunshine
NATR
$252M
| $562K | ﹤0.01% |
37,968
+19,952
| +111% | +$270K |
|
2462
Radcom
RDCM
$171M
| $561K | ﹤0.01% |
+41,305
| New | +$505K |
|
2463
Ethan Allen Interiors
ETD
$592M
| $559K | ﹤0.01% |
20,073
-6,121
| -23% | -$165K |
|
2464
Nicolet Bankshares
NIC
$3.62B
| $558K | ﹤0.01% |
+4,518
| New | +$528K |
|
2465
VictoryShares US Multi-Factor Minimum Volatility ETF
VSMV
$159M
| $557K | ﹤0.01% |
11,300
-8,000
| -41% | -$384K |
|
2466
Agilon Health
AGL
$1.57B
| $556K | ﹤0.01% |
9,676
+6,457
| +201% | +$518K |
|
|
FFWM
2467
DELISTED
First Foundation Inc
FFWM
| $555K | ﹤0.01% |
+108,853
| New | +$557K |
|
|
REFI
2468
Chicago Atlantic Real Estate Finance
REFI
$276M
| $553K | ﹤0.01% |
39,618
-102,581
| -72% | -$1.47M |
|
2469
Organogenesis Holdings
ORGO
$215M
| $551K | ﹤0.01% |
150,623
-174,391
| -54% | -$650K |
|
2470
US Gold Corp
USAU
$266M
| $550K | ﹤0.01% |
+45,121
| New | +$497K |
|
2471
Dominion Energy
D
$58.6B
| $549K | ﹤0.01% |
9,720
-40,345
| -81% | -$2.21M |
|
2472
Definitive Healthcare
DH
$77M
| $548K | ﹤0.01% |
140,510
-75,467
| -35% | -$238K |
|
|
HTT
2473
High Templar Tech Ltd
HTT
$393M
| $548K | ﹤0.01% |
174,421
-47,765
| -21% | -$133K |
|
2474
LivePerson
LPSN
$33.2M
| $547K | ﹤0.01% |
36,083
-7,830
| -18% | -$92.6K |
|
2475
Erasca
ERAS
$6.16B
| $543K | ﹤0.01% |
427,603
-164,034
| -28% | -$220K |
|
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.