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 | |
|---|---|---|---|---|---|---|
|
THR
2401
DELISTED
Thermon Group Holdings
THR
| $635K | ﹤0.01% |
+22,629
| New | +$613K |
|
2402
Biomea Fusion
BMEA
$115M
| $629K | ﹤0.01% |
349,647
-122,712
| -26% | -$236K |
|
2403
Watsco Inc
WSO
$12.8B
| $629K | ﹤0.01% |
+1,424
| New | +$661K |
|
2404
MiMedx Group
MDXG
$622M
| $629K | ﹤0.01% |
102,882
-221,962
| -68% | -$1.48M |
|
2405
Indivior Pharmaceuticals
INDV
$4.27B
| $628K | ﹤0.01% |
42,591
+8,114
| +24% | +$94.5K |
|
2406
Park Aerospace
PKE
$718M
| $625K | ﹤0.01% |
42,339
+317
| +0.8% | +$4.29K |
|
2407
Essex Property Trust
ESS
$18.9B
| $623K | ﹤0.01% |
2,200
-2,400
| -52% | -$674K |
|
|
SFIX
2408
Stitch Fix
SFIX
$439M
| $622K | ﹤0.01% |
168,000
-1,473
| -0.9% | -$5.51K |
|
2409
WisdomTree US MidCap Dividend Fund
DON
$4.08B
| $621K | ﹤0.01% |
12,400
-121,700
| -91% | -$5.88M |
|
2410
Sharplink Inc
SBET
$1.79B
| $621K | ﹤0.01% |
+62,582
| New | +$848K |
|
2411
Woori Financial
WF
$16.9B
| $620K | ﹤0.01% |
12,458
-15,867
| -56% | -$628K |
|
2412
Avantis US Small Cap Value ETF
AVUV
$31.3B
| $619K | ﹤0.01% |
6,800
-10,200
| -60% | -$879K |
|
2413
Addus HomeCare
ADUS
$2.26B
| $617K | ﹤0.01% |
+5,358
| New | +$579K |
|
2414
Mirion Technologies
MIR
$3.66B
| $617K | ﹤0.01% |
+28,650
| New | +$494K |
|
2415
NVE Corp
NVEC
$516M
| $617K | ﹤0.01% |
+8,376
| New | +$554K |
|
2416
Esquire Financial Holdings
ESQ
$1.39B
| $616K | ﹤0.01% |
6,506
-5,374
| -45% | -$464K |
|
2417
Ondas Inc
ONDS
$4.7B
| $615K | ﹤0.01% |
320,379
+166,179
| +108% | +$186K |
|
2418
Seer Inc
SEER
$113M
| $615K | ﹤0.01% |
287,423
-18,300
| -6% | -$36.7K |
|
|
NMAX
2419
Newsmax Inc
NMAX
$1.37B
| $615K | ﹤0.01% |
+40,619
| New | +$1.06M |
|
2420
Finance of America Companies
FOA
$186M
| $611K | ﹤0.01% |
+26,201
| New | +$551K |
|
2421
Peoples Financial Services
PFIS
$707M
| $610K | ﹤0.01% |
12,357
-3,813
| -24% | -$177K |
|
2422
Forward Air
FWRD
$594M
| $608K | ﹤0.01% |
24,791
-86,980
| -78% | -$1.54M |
|
|
LKFT
2423
Lakefront Biotherapeutics American Depositary Shares
LKFT
$1.9B
| $606K | ﹤0.01% |
21,659
-27,502
| -56% | -$737K |
|
2424
PUT
Core Scientific
CORZ
$5.55B
| $606K | ﹤0.01% |
35,500
+20,300
| +134% | +$203K |
|
2425
TD Synnex
SNX
$19.5B
| $604K | ﹤0.01% |
4,452
+989
| +29% | +$116K |
|
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.