Atara Biotherapeutics, Inc. — All Filings
1,000 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
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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 |
|---|---|---|---|---|
| EFFECT | — | 9999999995-26-000930 | Mar 25, 2026 | — |
| 424B3 | 424B3 | 0001193125-26-124322 | Mar 25, 2026 | — |
| 4 | 4 | 0001193125-26-116060 | Mar 19, 2026 | Mar 17, 2026 |
| S-3 | S-3 | 0001193125-26-110849 | Mar 17, 2026 | — |
| 424B5 | 424B5 | 0001193125-26-108386 | Mar 16, 2026 | — |
| 10-K | 10-K | 0001193125-26-108361 | Mar 16, 2026 | Dec 31, 2025 |
| 8-K | 8-K | 0001193125-26-108344 | Mar 16, 2026 | — |
| 8-K | 8-K | 0001193125-26-103127 | Mar 12, 2026 | — |
| 4 | — | 0000905148-26-001225 | Mar 11, 2026 | Mar 9, 2026 |
| 4 | — | 0000905148-26-001224 | Mar 11, 2026 | Mar 9, 2026 |
| 4 | — | 0000905148-26-001144 | Mar 4, 2026 | Mar 2, 2026 |
| 4 | — | 0000905148-26-001143 | Mar 4, 2026 | Mar 2, 2026 |
| 8-K | 8-K | 0001193125-26-086793 | Mar 3, 2026 | — |
| 144 | — | 0000905148-26-001102 | Mar 2, 2026 | — |
| 144 | — | 0000905148-26-001100 | Mar 2, 2026 | — |
| 8-K | 8-K | 0001193125-26-062534 | Feb 23, 2026 | Feb 20, 2026 |
| SCHEDULE 13D/A | — | 0001193125-26-013362 | Jan 14, 2026 | — |
| 4 | 4 | 0001193125-26-013358 | Jan 14, 2026 | Jan 12, 2026 |
| 144 | — | 0001193125-26-010883 | Jan 12, 2026 | — |
| 8-K | 8-K | 0001193125-26-010342 | Jan 12, 2026 | — |
| 8-K | 8-K | 0001193125-26-000907 | Jan 2, 2026 | Dec 30, 2025 |
| 4 | 4 | 0001193125-25-304018 | Dec 1, 2025 | Nov 28, 2025 |
| 4 | — | 0000905148-25-004141 | Nov 19, 2025 | Nov 17, 2025 |
| 4 | — | 0000905148-25-004140 | Nov 19, 2025 | Nov 17, 2025 |
| 144 | — | 0000905148-25-004102 | Nov 17, 2025 | — |
| 144 | — | 0000905148-25-004101 | Nov 17, 2025 | — |
| SCHEDULE 13D/A | — | 0001104659-25-112574 | Nov 14, 2025 | — |
| SCHEDULE 13G/A | — | 0000935836-25-000703 | Nov 14, 2025 | — |
| 10-Q | 10-Q | 0001193125-25-276219 | Nov 12, 2025 | Sep 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 |
| 4 | — | 0000905148-25-003070 | Aug 20, 2025 | Aug 18, 2025 |
| 4 | — | 0000905148-25-003069 | Aug 20, 2025 | Aug 18, 2025 |
| 4 | 4 | 0000950170-25-110310 | Aug 19, 2025 | Aug 15, 2025 |
| SCHEDULE 13D/A | — | 0000950170-25-110311 | Aug 19, 2025 | — |
| 144 | — | 0000905148-25-003038 | Aug 18, 2025 | — |
| 144 | — | 0000905148-25-003037 | Aug 18, 2025 | — |
| 10-Q | 10-Q | 0000950170-25-106550 | Aug 11, 2025 | Jun 30, 2025 |
| 8-K | 8-K | 0000950170-25-106533 | Aug 11, 2025 | — |
| 4 | 4 | 0000950170-25-097087 | Jul 21, 2025 | Jul 17, 2025 |
| 8-K | 8-K | 0001193125-25-158719 | Jul 14, 2025 | — |
| 4 | — | 0000905148-25-002142 | Jun 12, 2025 | Jun 10, 2025 |
| 4 | — | 0000905148-25-002141 | Jun 12, 2025 | Jun 10, 2025 |
| 4 | — | 0000905148-25-002140 | Jun 12, 2025 | Jun 10, 2025 |
| 4 | — | 0000905148-25-002139 | Jun 12, 2025 | Jun 10, 2025 |
| 4 | — | 0000905148-25-002138 | Jun 12, 2025 | Jun 10, 2025 |
| 4 | — | 0000905148-25-002137 | Jun 12, 2025 | Jun 10, 2025 |
| 8-K | 8-K | 0001193125-25-139150 | Jun 11, 2025 | Jun 10, 2025 |
| SCHEDULE 13D | — | 0001104659-25-052422 | May 23, 2025 | — |