Atara Biotherapeutics, Inc. — 8-K Filings
140 8-K filings on record
This page lists all 8-K filings submitted to the SEC by Atara Biotherapeutics, Inc. (ATRA), sorted by most recent first. Each row links to the full filing on EdgarLookup. Atara Biotherapeutics, Inc. has filed 140 8-K documents with the SEC since 2015. To view all SEC filings by Atara Biotherapeutics, Inc., see the full filings list.
All
10-K
10-K/A
10-Q
144
3
4
4/A
424B1
424B3
424B4
424B5
8-A12B
8-K
CERTNAS
CORRESP
CT ORDER
DEF 14A
DEFA14A
DEFR14A
DEL AM
DRS
DRS/A
DRSLTR
EFFECT
FWP
POS AM
POSASR
PRE 14A
S-1
S-1/A
S-1MEF
S-3
S-3ASR
S-8
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SCHEDULE 13D
SCHEDULE 13D/A
SCHEDULE 13G
SCHEDULE 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 8-K | 8-K | 0001193125-26-108344 | Mar 16, 2026 | — |
| 8-K | 8-K | 0001193125-26-103127 | Mar 12, 2026 | — |
| 8-K | 8-K | 0001193125-26-086793 | Mar 3, 2026 | — |
| 8-K | 8-K | 0001193125-26-062534 | Feb 23, 2026 | Feb 20, 2026 |
| 8-K | 8-K | 0001193125-26-010342 | Jan 12, 2026 | — |
| 8-K | 8-K | 0001193125-26-000907 | Jan 2, 2026 | Dec 30, 2025 |
| 8-K | 8-K | 0001193125-25-276209 | Nov 12, 2025 | — |
| 8-K | 8-K | 0001193125-25-232117 | Oct 7, 2025 | Oct 6, 2025 |
| 8-K | 8-K | 0000950170-25-112898 | Sep 4, 2025 | Sep 2, 2025 |
| 8-K | 8-K | 0000950170-25-106533 | Aug 11, 2025 | — |
| 8-K | 8-K | 0001193125-25-158719 | Jul 14, 2025 | — |
| 8-K | 8-K | 0001193125-25-139150 | Jun 11, 2025 | Jun 10, 2025 |
| 8-K | 8-K | 0001193125-25-121824 | May 16, 2025 | May 14, 2025 |
| 8-K | 8-K | 0001193125-25-120345 | May 15, 2025 | May 14, 2025 |
| 8-K | 8-K | 0000950170-25-069198 | May 12, 2025 | — |
| 8-K | 8-K | 0001193125-25-113811 | May 6, 2025 | May 5, 2025 |
| 8-K | 8-K | 0000950170-25-051121 | Apr 4, 2025 | Mar 31, 2025 |
| 8-K | 8-K | 0001193125-25-068789 | Mar 31, 2025 | Mar 25, 2025 |
| 8-K | 8-K | 0000950170-25-035482 | Mar 7, 2025 | — |
| 8-K | 8-K | 0000950170-25-030832 | Mar 3, 2025 | — |
| 8-K | 8-K | 0000950170-25-009225 | Jan 27, 2025 | — |
| 8-K | 8-K | 0000950170-25-006992 | Jan 21, 2025 | — |
| 8-K | 8-K | 0000950170-25-006191 | Jan 16, 2025 | — |
| 8-K | 8-K | 0001193125-24-284167 | Dec 23, 2024 | Dec 20, 2024 |
| 8-K | 8-K | 0000950170-24-125334 | Nov 12, 2024 | Nov 8, 2024 |
| 8-K | 8-K | 0001193125-24-237582 | Oct 15, 2024 | Oct 14, 2024 |
| 8-K | 8-K | 0001193125-24-212168 | Sep 3, 2024 | — |
| 8-K | 8-K | 0000950170-24-095526 | Aug 12, 2024 | Aug 10, 2024 |
| 8-K | 8-K | 0001193125-24-180371 | Jul 17, 2024 | — |
| 8-K | 8-K | 0001193125-24-164554 | Jun 20, 2024 | — |
| 8-K | 8-K | 0001193125-24-162069 | Jun 17, 2024 | — |
| 8-K | 8-K | 0001193125-24-158461 | Jun 11, 2024 | Jun 10, 2024 |
| 8-K | 8-K | 0000950170-24-056901 | May 9, 2024 | — |
| 8-K | 8-K | 0000950170-24-038690 | Mar 29, 2024 | Mar 26, 2024 |
| 8-K | 8-K | 0000950170-24-037643 | Mar 28, 2024 | — |
| 8-K | 8-K | 0000950170-24-019416 | Feb 23, 2024 | Feb 22, 2024 |
| 8-K | 8-K | 0001193125-24-005188 | Jan 9, 2024 | Jan 8, 2024 |
| 8-K | 8-K | 0001193125-24-003945 | Jan 8, 2024 | — |
| 8-K | 8-K | 0000950170-23-071896 | Dec 20, 2023 | — |
| 8-K | 8-K | 0001193125-23-273808 | Nov 9, 2023 | Nov 8, 2023 |
| 8-K | 8-K | 0001193125-23-268185 | Nov 1, 2023 | — |
| 8-K | 8-K | 0000950170-23-057146 | Nov 1, 2023 | Oct 31, 2023 |
| 8-K | 8-K | 0001193125-23-237762 | Sep 20, 2023 | Sep 19, 2023 |
| 8-K | 8-K | 0000950170-23-039797 | Aug 8, 2023 | — |
| 8-K | 8-K | 0000950170-23-027257 | Jun 9, 2023 | — |
| 8-K | 8-K | 0000950170-23-026351 | Jun 5, 2023 | May 31, 2023 |
| 8-K | 8-K | 0000950170-23-021809 | May 12, 2023 | — |
| 8-K | 8-K | 0000950170-23-018793 | May 8, 2023 | May 5, 2023 |
| 8-K | 8-K | 0000950170-23-011416 | Mar 31, 2023 | — |
| 8-K | 8-K | 0001193125-23-067628 | Mar 10, 2023 | — |