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EcoR1 Capital, LLC

Q2 2026 13F filing

Updated 27 days ago

33 disclosed positions worth $2.1B

Portfolio value
$2.1B
Total holdings
33
New positions
0
Closed positions
0
Increased
0
Decreased
0
Turnover
Filed
2026-08-14

Full holdings

Every line item disclosed in Q2 2026

Z

ZYMEWORKS INC

Value
$600.4M
Shares
22.97M
% Port
29.19%
A
2.ADI

ANAPTYSBIO INC

Value
$531.9M
Shares
7.88M
% Port
25.86%
A

AKTIS ONCOLOGY INC

Value
$155.5M
Shares
4.82M
% Port
7.56%
C

CG ONCOLOGY INC

Value
$106.2M
Shares
1.49M
% Port
5.16%
E

ETON PHARMACEUTICALS INC

Value
$78.6M
Shares
2.17M
% Port
3.82%
C

CRISPR THERAPEUTICS AG

Value
$75.8M
Shares
1.39M
% Port
3.68%
O

ORIC PHARMACEUTICALS INC

Value
$72.9M
Shares
6.73M
% Port
3.54%
?
8.N/A

FIRST TRACKS BIOTHERAPEUTICS

Value
$63.9M
Shares
3.17M
% Port
3.11%
G

LAKEFRONT BIOTHERAPEUTICS NV

Value
$50M
Shares
1.67M
% Port
2.43%
N
10.NGNE

NEUROGENE INC

Value
$40M
Shares
1.27M
% Port
1.94%
C
11.CGON

CG ONCOLOGY INC

Value
$39.9M
Shares
561.5K
% Port
1.94%
S
12.STOK

STOKE THERAPEUTICS INC

Value
$24M
Shares
735.0K
% Port
1.17%
?
13.N/A

FULCRUM THERAPEUTICS INC

Value
$24M
Shares
6.55M
% Port
1.17%
L
14.LEGN

LEGEND BIOTECH CORP

Value
$23.1M
Shares
800.0K
% Port
1.12%
?
15.N/A

BRIDGEBIO ONCOLOGY THERAPEUT

Value
$21.5M
Shares
2.82M
% Port
1.05%
M
16.MBX

MBX BIOSCIENCES INC

Value
$21.4M
Shares
388.5K
% Port
1.04%
Z
17.ZBIO

ZENAS BIOPHARMA INC

Value
$20M
Shares
789.5K
% Port
0.97%
?
18.N/A

ATARA BIOTHERAPEUTICS INC

Value
$17.8M
Shares
1.55M
% Port
0.87%
R
19.RLAY

RELAY THERAPEUTICS INC

Value
$13.1M
Shares
697.9K
% Port
0.63%
A
20.AURA

AURA BIOSCIENCES INC

Value
$11.8M
Shares
1.67M
% Port
0.58%
O
21.ODTX

ODYSSEY THERAPEUTICS INC

Value
$10.4M
Shares
555.6K
% Port
0.51%
E
22.EIKN

EIKON THERAPEUTICS INC

Value
$9.6M
Shares
732.6K
% Port
0.46%
P
23.PHVS

PHARVARIS N V

Value
$8.1M
Shares
235.0K
% Port
0.40%
Z
24.ZURA

ZURA BIO LTD

Value
$7M
Shares
1.18M
% Port
0.34%
P
25.PHAT

PHATHOM PHARMACEUTICALS INC

Value
$6.8M
Shares
625.0K
% Port
0.33%
N
26.NRIX

NURIX THERAPEUTICS INC

Value
$6.6M
Shares
270.0K
% Port
0.32%
E
27.EQR

ERASCA INC

Value
$6M
Shares
330.0K
% Port
0.29%
?
28.N/A

ELOXX PHARMACEUTICALS INC

Value
$5.6M
Shares
400.0K
% Port
0.27%
?
29.N/A

AARDVARK THERAPEUTICS INC

Value
$2.3M
Shares
396.2K
% Port
0.11%
?
30.N/A

HELIX ACQUISITION CORP III USD

Value
$2.1M
Shares
200.0K
% Port
0.10%
M
31.MREO

MEREO BIOPHARMA GROUP PLC

Value
$318K
Shares
1.00M
% Port
0.02%
S

SURROZEN INC

Value
$115K
Shares
4.4K
% Port
0.01%
?
33.N/A

AARDVARK THERAPEUTICS INC

Value
$85K
Shares
14.7K
% Port
0.00%