—

EcoR1 Capital, LLC

Q1 2026 13F Holdings

  • Location
    san francisco, CA
  • Num holdings

    30

  • Value ($000)

    $2,356,319

  • Date Filed
    05/15/2026
  • Form type
    13F-HR
  • CIK
    0001587114
  • All SEC filings
  • Note
    Holdings aggregated across “other managers” listed in original SEC filing, see here for detailed holdings broken out by other managers
Compare Q1 2026 to
Select Quarter
Issuer Name
Class
CUSIP
VALUE
%
Shares
Principal
Option Type
Z
ZYME

ZYMEWORKS INC

COM
98985Y108
$575.18M
24 %

22,970,388

A
ANAB

ANAPTYSBIO INC

COM
032724106
$437.03M
19 %

7,880,094

---

JAZZ PHARMACEUTICALS PLC

SHS USD
G50871105
$322.61M
14 %

1,706,469

C
CNTA

CENTESSA PHARMACEUTICALS PLC

SPONSORED ADS
152309100
$238.32M
10 %

6,000,000

C
CRNX

CRINETICS PHARMACEUTICALS IN

COM
22663K107
$155.74M
7 %

4,288,120

---

AKTIS ONCOLOGY INC

COM ADDED
01021M104
$86.31M
4 %

4,824,469

O
ORIC

ORIC PHARMACEUTICALS INC

COM
68622P109
$85.25M
4 %

6,728,116

C
CGON

CG ONCOLOGY INC

COM
156944100
$74.58M
3 %

1,102,000

---

CRISPR THERAPEUTICS AG

NAMEN AKT
H17182108
$66.09M
3 %

1,389,276

E
ETON

ETON PHARMACEUTICALS INC

COM
29772L108
$53.6M
2 %

2,171,938

Rows Per Page
10
  • 10
  • 50
  • 100
1 - 10 of 30