Atara Biotherapeutics, Inc.
ATRA
DELAYED 1 MONTH
12 insider filings · Latest: Jul 22, 2026
Common Stock Transactions
| Txn Date | Accepted | Insider | Type | Shares | Avg Price | Value | Shares Owned | Filing |
|---|---|---|---|---|---|---|---|---|
| May 18, 2026 | May 20 9:24 PM | Anhco NguyenDirector, President and CEO | Sale | 5,241 | $9.13 | $47.8K | 137,837(D) | View → |
| May 18, 2026 | May 20 9:24 PM | Yanina Grant-HuertaChief Accounting Officer | Sale | 2,414 | $9.13 | $22.0K | 49,636(D) | View → |
| May 7, 2026 | May 11 10:45 PM | Panacea Innovation Ltd10% Owner | Sale | 313,446 | $10.10 | $3.2M | 1,011,000(I) | View → |
| May 7, 2026 | May 11 9:34 PM | EcoR1 Capital, LLC10% Owner | Purchase | 507,407 | $9.35 | $4.7M | 1,552,000(I) | View → |
| Mar 2, 2026 | Mar 4 9:28 PM | Yanina Grant-HuertaChief Accounting Officer | Sale | 2,104 | $5.08 | $10.7K | 31,750(D) | View → |
| Mar 2, 2026 | Mar 4 9:28 PM | Anhco NguyenDirector, President and CEO | Sale | 2,996 | $5.09 | $15.2K | 61,978(D) | View → |
Stock Options & Derivatives
| Txn Date | Accepted | Insider | Type | Shares | Exercise Price | Shares Owned | Filing |
|---|---|---|---|---|---|---|---|
| Jul 22, 2026 | Jul 25 1:00 AM | Redmile Group, LLCDirector | Option Exercise | 195,211 | — | 0(I) | View → |