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 | |
|---|---|---|---|---|---|---|
|
FSUN
1376
FirstSun Capital Bancorp
FSUN
$1.78B
| $3.56M | 0.01% |
102,533
+49,330
| +93% | +$1.73M |
|
1377
EyePoint Inc
EYPT
$420M
| $3.55M | 0.01% |
376,776
+52,916
| +16% | +$365K |
|
1378
Afya
AFYA
$1.26B
| $3.54M | 0.01% |
198,456
+82,325
| +71% | +$1.51M |
|
|
OPLN
1379
Openlane
OPLN
$4.16B
| $3.54M | 0.01% |
144,906
+79,114
| +120% | +$1.67M |
|
1380
Relay Therapeutics
RLAY
$4.33B
| $3.54M | 0.01% |
1,023,384
+179,528
| +21% | +$534K |
|
1381
Tetra Tech
TTEK
$9.44B
| $3.53M | 0.01% |
98,211
-888,726
| -90% | -$29.6M |
|
1382
Booking.com
BKNG
$160B
| $3.53M | 0.01% |
15,250
-4,750
| -24% | -$973K |
|
1383
AMERISAFE
AMSF
$490M
| $3.52M | 0.01% |
80,570
+55,437
| +221% | +$2.61M |
|
1384
ProShares S&P MidCap 400 Dividend Aristocrats ETF
REGL
$1.79B
| $3.52M | 0.01% |
43,200
-700
| -2% | -$55.8K |
|
1385
SoFi Select 500 ETF
SFY
$685M
| $3.52M | 0.01% |
+29,800
| New | +$3.18M |
|
1386
Algonquin Power & Utilities
AQN
$4.38B
| $3.51M | 0.01% |
612,900
-10,000
| -2% | -$54.8K |
|
1387
Assured Guaranty
AGO
$3.26B
| $3.5M | 0.01% |
+40,236
| New | +$3.43M |
|
1388
SI-BONE Inc
SIBN
$873M
| $3.5M | 0.01% |
186,167
+68,125
| +58% | +$1.13M |
|
1389
Abbott
ABT
$202B
| $3.5M | 0.01% |
25,752
-1,635
| -6% | -$216K |
|
1390
LeMaitre Vascular
LMAT
$1.83B
| $3.5M | 0.01% |
42,165
+27,624
| +190% | +$2.31M |
|
1391
IES Holdings
IESC
$12.9B
| $3.5M | 0.01% |
23,626
-92,936
| -80% | -$11M |
|
1392
Samsara
IOT
$23.5B
| $3.5M | 0.01% |
87,946
-121,738
| -58% | -$5.03M |
|
|
TWFG
1393
TWFG Inc
TWFG
$390M
| $3.48M | 0.01% |
99,529
+16,251
| +20% | +$542K |
|
1394
WisdomTree US LargeCap Fund
EPS
$1.65B
| $3.48M | 0.01% |
+54,400
| New | +$3.25M |
|
1395
NovoCure
NVCR
$1.95B
| $3.48M | 0.01% |
195,336
-234,375
| -55% | -$4.08M |
|
|
MFA
1396
MFA Financial
MFA
$904M
| $3.47M | 0.01% |
366,891
-60,514
| -14% | -$572K |
|
1397
Cathay General Bancorp
CATY
$4.16B
| $3.47M | 0.01% |
76,182
+28,632
| +60% | +$1.22M |
|
1398
Community Trust Bancorp
CTBI
$1.39B
| $3.46M | 0.01% |
65,450
+14,784
| +29% | +$743K |
|
1399
Harbor Long-Term Growers ETF
WINN
$1.17B
| $3.46M | 0.01% |
+118,900
| New | +$3.11M |
|
1400
Xencor
XNCR
$2.16B
| $3.46M | 0.01% |
439,843
+134,712
| +44% | +$1.21M |
|
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.