EcoR1 Capital, LLC

Q2 2025 13F Holdings

  • Location
    san francisco, CA
  • Num holdings

    37

  • Value ($000)

    $1,689,331

  • Date Filed
    08/14/2025
  • 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 Q2 2025 to
Select Quarter
Issuer Name
Class
CUSIP
VALUE
%
Shares
Principal
Option Type
ZYME
ZYME

ZYMEWORKS INC

COM
98985Y108
$288.28M
17 %

22,970,388

APLS
APLS

APELLIS PHARMACEUTICALS INC

COM
03753U106
$205.92M
12 %

11,895,808

---

JAZZ PHARMACEUTICALS PLC

SHS USD
G50871105
$181.09M
11 %

1,706,469

ANAB
ANAB

ANAPTYSBIO INC

COM
032724106
$174.94M
10 %

7,880,094

CRNX
CRNX

CRINETICS PHARMACEUTICALS IN

COM
22663K107
$123.33M
7 %

4,288,120

ITOS
ITOS

ITEOS THERAPEUTICS INC

COM
46565G104
$106.57M
6 %

10,688,978

---

CRISPR THERAPEUTICS AG

NAMEN AKT
H17182108
$67.57M
4 %

1,389,276

---

UNIQURE NV

SHS
N90064101
$55.61M
3 %

3,988,971

TNGX
TNGX

TANGO THERAPEUTICS INC

COM
87583X109
$54.43M
3 %

10,630,736

XNCR
XNCR

XENCOR INC

COM
98401F105
$48.30M
3 %

6,144,767

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