EcoR1 Capital, LLC

EcoR1 Capital, LLC is listed in filings as 10% Owner at Atara Biotherapeutics, Inc.. This profile follows SEC Form 4 activity through May 11, 2026, including purchase activity and sale activity. Recent filings connect the profile to Atara Biotherapeutics, Inc. (ATRA), Adaptimmune Therapeutics plc (ADAPY), Zymeworks Inc. (ZYME), and iTeos Therapeutics, Inc. (ITOS). The current snapshot covers public activity from Aug 16, 2024 to May 11, 2026. Reported amounts are shown as $4.7M to $272.0K. The page organizes purchases, sales, issuer links, reported share activity, and filing evidence for review as public disclosure data.