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E

EcoR1 Capital, LLC

Also a 13F filer: see its fund portfolio and quarterly moves →

Open-market buys
3
$44.7M total
Open-market sells
0
$0 total
Tracking since
Jan 2026
Activity timeline
Open-market buy — $4.7M
Atara Biotherapeutics, Inc. · May 7, 2026
Open-market buy — $2.6M
Aktis Oncology, Inc. · Jan 12, 2026
Open-market trades from the last two years.

1 more trades. A free account shows you more; Premium shows every one.

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Holdings as last reported
3,174,519 Common Stock in TRAXV
Held indirectly (See Note) · as of 2026-04-20
1,552,000 Common Stock in ATRA
Held indirectly (See Note) · as of 2026-05-07

2 more holdings. A free account shows you more; Premium shows every one.

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Companies touched
Atara Biotherapeutics, Inc.
CIK 0001604464
Aktis Oncology, Inc.
CIK 0002035832

1 more companies. A free account shows you more; Premium shows every one.

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