// company-profile
Atara Biotherapeutics, Inc.
ATRAExchange: NasdaqSector: Biological Products, (No Diagnostic Substances)Inc.: DEFilings: 67Insiders: 19
// activity-summary
Recent insider activity is bullish. Over the last 30 days, 1 insider purchased shares (net $4.7M). Buying was led by EcoR1 Capital, LLC.
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| May 7, 2026 | EcoR1 Capital, LLC | ATRA | Purchase | 507,407 | $9.35 | $4.74M |
| Mar 17, 2026 | Panacea Innovation Ltd | ATRA | Option Exercise | 259,163 | $0.00 | $0K |
| Mar 17, 2026 | Panacea Innovation Ltd | ATRA | Option Exercise | 259,163 | $6.61 | $1.71M |
| Mar 17, 2026 | Panacea Innovation Ltd | ATRA | Tax Withholding | 5 | $5.23 | $0K |
| Mar 9, 2026 | Grant-Huerta Yanina | ATRA | Award | 20,300 | $0.00 | $0K |
45 more transactions hidden
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