Atara Biotherapeutics, Inc.
ATRA
16 insider filings · Latest: Sep 4, 2026
Common Stock Transactions
| Txn Date | Accepted | Insider | Type | Shares | Avg Price | Value | Shares Owned | Filing |
|---|---|---|---|---|---|---|---|---|
| May 16, 2025 | May 16 11:27 PM | Grant-Huerta Yanina | Proposed Sale | 2,350 | $7.61 | $17.9K | — | View → |
| Mar 3, 2025 | Mar 3 11:30 PM | Nguyen AnhCo | Proposed Sale | 3,929 | $6.91 | $27.1K | — | View → |
| Mar 3, 2025 | Mar 3 11:29 PM | Hyllengren Eric J | Proposed Sale | 1,426 | $6.91 | $9.9K | — | View → |
| Mar 3, 2025 | Mar 3 11:27 PM | Henrich Jill | Proposed Sale | 1,245 | $6.91 | $8.6K | — | View → |
| Nov 18, 2024 | Nov 18 10:58 PM | Nguyen AnhCo | Proposed Sale | 1,857 | $12.00 | $22.3K | — | View → |
| Nov 18, 2024 | Nov 18 10:56 PM | Murugan Amar | Proposed Sale | 1,342 | $12.00 | $16.1K | — | View → |
| Nov 18, 2024 | Nov 18 10:55 PM | Hyllengren Eric J | Proposed Sale | 1,517 | $12.00 | $18.2K | — | View → |
| Nov 18, 2024 | Nov 18 10:54 PM | Henrich Jill | Proposed Sale | 1,112 | $12.00 | $13.3K | — | View → |
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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 → |
| Mar 17, 2026 | Mar 19 8:30 PM | Panacea Innovation Ltd10% Owner | Option Exercise | 259,163 | $0.0001 | 0(I) | View → |