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Institutional filer profile

EcoR1 Capital LLC Insider Trades

Latest reported as Corporate insider of Atara Biotherapeutics, Inc. (ATRA).

Purchase filings
1
Reported companies
2
Net open-market value
-$60,255,734.25
Latest transaction
May 7, 2026

Affiliated corporations

Reported company relationships

ATRALatest reported

Atara Biotherapeutics, Inc.

Corporate insider

TRAXPrior filing

First Tracks Biotherapeutics, Inc.

Corporate insider

Transaction history

Open-market Transactions

Open-market insider purchase and sale transactions
DateCompanyRoleTypeSharesPriceTotal value
May 7, 2026Atara Biotherapeutics, Inc. (ATRA)Corporate insiderOpen Market Purchase507,407$9.35$4,744,255
Apr 20, 2026First Tracks Biotherapeutics, Inc. (TRAX)Corporate insiderSale4,705,575$13.81$64,999,990