EcoR1 Capital, LLC

Atara Biotherapeutics, Inc. · 10% Owner

EcoR1 Capital, LLC is listed in public filings as 10 percent owner. This EcoR1 Capital, LLC insider trading page organizes Form 4 disclosures, reported purchases and sales, transaction dates, share amounts, related issuers, and historical insider activity so readers can review the person's public trading record in one place. Companies and tickers connected to this insider trading profile include Atara Biotherapeutics, Inc. (ATRA), Adaptimmune Therapeutics plc (ADAPY), Zymeworks Inc. (ZYME), iTeos Therapeutics, Inc. (ITOS), and Prothena Corporation plc (PRTA). Investors use EcoR1 Capital, LLC's insider trading disclosures to study buying and selling patterns, position changes, company-specific activity, and the source evidence behind each reported transaction.

History Trades

CompanyValueActionPriceCurrent Price
Adaptimmune Therapeutics plcADAPY$2.8M27.4M sharesSellJul 30, 2025$0.1021--
Adaptimmune Therapeutics plcADAPY$272k2.7M sharesSellJul 29, 2025$0.1012--
Adaptimmune Therapeutics plcADAPY$3.8M33.9M sharesSellJul 28, 2025$0.1125--
Zymeworks Inc.ZYME$70k5.9k sharesBuyMay 19, 2025$11.78--
iTeos Therapeutics, Inc.ITOS$26M3.3M sharesBuyMay 15, 2025$8.00--
Zymeworks Inc.ZYME$566k49.5k sharesBuyMay 15, 2025$11.43--
iTeos Therapeutics, Inc.ITOS$12M1.7M sharesBuyMay 14, 2025$7.41--
Prothena Corporation plcPRTA$15M2M sharesSellMay 6, 2025$7.64--
Prothena Corporation plcPRTA$7.9M977.7k sharesSellMay 5, 2025$8.11--
Prothena Corporation plcPRTA$28M3.3M sharesSellMay 2, 2025$8.36--
Zymeworks Inc.ZYME$631k54.8k sharesBuyApr 17, 2025$11.52--
Zymeworks Inc.ZYME$826k74k sharesBuyApr 16, 2025$11.16--
Zymeworks Inc.ZYME$2.2M196.4k sharesBuyApr 4, 2025$11.17--
Zymeworks Inc.ZYME$1.4M120.8k sharesBuyApr 3, 2025$11.84--
Zymeworks Inc.ZYME$881k74.4k sharesBuyApr 2, 2025$11.85--
Zymeworks Inc.ZYME$565k48.7k sharesBuyApr 1, 2025$11.60--
Zymeworks Inc.ZYME$52k4.4k sharesBuyMar 31, 2025$11.75--
Zymeworks Inc.ZYME$537k43.8k sharesBuyMar 26, 2025$12.24--
Zymeworks Inc.ZYME$690k53.5k sharesBuyMar 25, 2025$12.91--
Zymeworks Inc.ZYME$297k22.7k sharesBuyMar 24, 2025$13.08--
Zymeworks Inc.ZYME$397k31k sharesBuyMar 21, 2025$12.78--
Zymeworks Inc.ZYME$950k73.5k sharesBuyMar 20, 2025$12.93--
Zymeworks Inc.ZYME$737k58.3k sharesBuyMar 19, 2025$12.64--
Zymeworks Inc.ZYME$1.4M113.9k sharesBuyMar 18, 2025$12.65--
Zymeworks Inc.ZYME$688k56.3k sharesBuyMar 17, 2025$12.23--
Zymeworks Inc.ZYME$5.8M468.4k sharesBuyMar 13, 2025$12.48--
Zymeworks Inc.ZYME$3.6M292.9k sharesBuyMar 12, 2025$12.25--
Zymeworks Inc.ZYME$3.7M320.7k sharesBuyMar 11, 2025$11.49--
Zymeworks Inc.ZYME$274k19.7k sharesBuyJan 17, 2025$13.87--
Zymeworks Inc.ZYME$1.7M121.7k sharesBuyJan 16, 2025$13.89--
Zymeworks Inc.ZYME$547k39k sharesBuyJan 15, 2025$14.01--
Zymeworks Inc.ZYME$739k54.5k sharesBuyJan 14, 2025$13.56--
Zymeworks Inc.ZYME$993k74.1k sharesBuyJan 13, 2025$13.39--
Zymeworks Inc.ZYME$2.7M204.1k sharesBuyJan 10, 2025$13.13--
Zymeworks Inc.ZYME$296k21k sharesBuyJan 8, 2025$14.07--
Zymeworks Inc.ZYME$2.3M157.9k sharesBuyJan 2, 2025$14.78--
AnaptysBio, Inc.ANAB$86k6.6k sharesBuyJan 2, 2025$12.95--
Zymeworks Inc.ZYME$2.1M146.5k sharesBuyDec 31, 2024$14.57--
AnaptysBio, Inc.ANAB$172k13.3k sharesBuyDec 31, 2024$12.93--
Zymeworks Inc.ZYME$853k59k sharesBuyDec 30, 2024$14.47--
AnaptysBio, Inc.ANAB$842k65.2k sharesBuyDec 30, 2024$12.92--
Zymeworks Inc.ZYME$1.5M101.7k sharesBuyDec 27, 2024$14.49--
Zymeworks Inc.ZYME$240k16.7k sharesBuyDec 26, 2024$14.38--
Zymeworks Inc.ZYME$169k12k sharesBuyDec 24, 2024$14.12--
Zymeworks Inc.ZYME$3.6M251.5k sharesBuyDec 23, 2024$14.25--
Zymeworks Inc.ZYME$9.9M704.5k sharesBuyDec 20, 2024$14.08--
Zymeworks Inc.ZYME$4.0M298.8k sharesBuyDec 19, 2024$13.53--
Tango Therapeutics, Inc.TNGX$3.3M1.1M sharesSellNov 7, 2024$2.92--
Tango Therapeutics, Inc.TNGX$205k62.3k sharesSellNov 7, 2024$3.29--
Tango Therapeutics, Inc.TNGX$4.9M1.5M sharesSellNov 6, 2024$3.28--
Showing 1-50 of 51
EcoR1 Capital, LLC History Trades | TradingNote