ATRA News
Official issuer or fund updates, exact SEC current reports, and large established publisher coverage, newest first. Every lawfully retained item remains in the corpus; each public page contains at most 100 rows. Headlines open the exact source; summaries are concise descriptions and not investment recommendations. Captured 2026-08-31.
| Date | Type | Publisher | Headline | Summary |
|---|---|---|---|---|
| 2026-08-12 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02. |
| 2026-06-26 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.02. |
| 2026-06-12 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.02,5.07. |
| 2026-05-12 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 9.01. |
| 2026-05-07 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 8.01. |
| 2026-05-01 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 3.01. |
| 2026-03-16 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2026-03-12 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2026-03-03 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2026-02-23 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 1.01,3.02,8.01,9.01. |
| 2026-01-12 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,8.01,9.01. |
| 2026-01-02 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 1.01,9.01. |
| 2025-11-12 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2025-10-07 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.05. |
| 2025-09-04 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.02. |
| 2025-08-11 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2025-07-14 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,8.01,9.01. |
| 2025-06-11 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.07. |
| 2025-05-16 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2025-05-15 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,5.02,9.01. |
| 2025-05-12 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.05. |
| 2025-05-06 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2025-04-04 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 1.01. |
| 2025-03-31 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.02. |
| 2025-03-07 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2025-03-03 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.05,9.01. |
| 2025-01-27 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.05,9.01. |
| 2025-01-21 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2025-01-16 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,8.01,9.01. |
| 2024-12-23 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.03,9.01. |
| 2024-11-12 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,5.02,9.01. |
| 2024-10-15 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.02. |
| 2024-09-03 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.02,8.01,9.01. |
| 2024-08-12 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,5.02,9.01. |
| 2024-07-17 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2024-06-20 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 3.03,5.03,9.01. |
| 2024-06-17 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2024-06-11 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.07. |
| 2024-05-09 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2024-03-29 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.02. |
| 2024-03-28 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2024-02-23 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.02. |
| 2024-01-09 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 1.01,3.01,9.01. |
| 2024-01-08 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.05,5.02,7.01,8.01,9.01. |
| 2023-12-20 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2023-11-09 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2023-11-01 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 1.01,2.02,2.05,9.01. |
| 2023-11-01 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2023-09-20 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2023-08-08 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2023-06-09 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.02. |
| 2023-06-05 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.02,5.07. |
| 2023-05-12 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.02. |
| 2023-05-08 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,5.02,9.01. |
| 2023-03-31 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.02. |
| 2023-03-10 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 7.01. |
| 2023-02-08 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,5.02,9.01. |
| 2023-01-06 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.03. |
| 2022-12-20 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 1.01. |
| 2022-12-19 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.02,8.01. |
| 2022-11-08 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2022-09-28 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 1.01. |
| 2022-09-27 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.03,9.01. |
| 2022-08-08 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 1.01,2.02,2.05,5.02,9.01. |
| 2022-06-24 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.07. |
| 2022-05-19 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 1.02. |
| 2022-05-05 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2022-04-04 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.01,9.01. |
| 2022-02-28 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2022-02-18 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 8.01. |
| 2022-01-26 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 1.01,2.02,5.02,9.01. |
| 2022-01-10 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 7.01,9.01. |
| 2021-11-26 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2021-11-04 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2021-10-04 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 1.01. |
| 2021-08-10 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.02. |
| 2021-08-09 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2021-06-09 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.07. |
| 2021-05-04 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2021-03-01 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2021-01-11 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 7.01,9.01. |
| 2021-01-04 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 8.01. |
| 2020-12-09 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2020-12-07 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 1.01. |
| 2020-11-09 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2020-08-05 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2020-06-19 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.07. |
| 2020-05-28 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2020-05-12 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.02. |
| 2020-05-06 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2020-04-30 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.02. |
| 2020-02-27 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2019-11-07 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2019-10-25 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.02. |
| 2019-08-08 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2019-07-22 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,8.01,9.01. |
| 2019-06-28 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.07. |
| 2019-06-05 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 8.01. |
| 2019-05-28 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 5.02,9.01. |
| 2019-05-09 | Current report | SEC filing | Atara Biotherapeutics, Inc. filed Form 8-K | Atara Biotherapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |