Atara Biotherapeutics, Inc. (ATRA) Form 8-K Material Events
Atara Biotherapeutics, Inc. (ATRA) is a publicly traded company on the Nasdaq, categorized under SIC 2836 (Biological Products, (No Diagnostic Substances)). Access real-time SEC filings, 10-K annual reports, 10-Q quarterlies, 8-K current reports, PCAOB auditor history, and executive compensation disclosures.
Ticker: ATRA
CIK: 1604464
Exchange: Nasdaq
SIC 2836: Biological Products, (No Diagnostic Substances)
Fiscal Year End: 12/31
State: DE
Independent PCAOB Auditor
Explore PCAOB Audit Intelligence →
Audit Firm
Deloitte & Touche LLP
Auditor SinceSince 12/31/2016 12:00:00 AM
Lead Engagement PartnerSean Kennedy
Audit LocationSan Francisco, California, United States
Latest SEC EDGAR Filings
Showing 10-K, 10-Q, 8-K, Form 4, and other SEC submissions| Form | Filing Date | Reporting Period | Description | Accession Number | Actions |
|---|---|---|---|---|---|
| 4 | 2026-09-04 | 2026-09-04 | FORM 4 | 0000905148-26-004085 | View SEC Doc Filr Page |
| 144 | 2026-08-26 | — | 144 Filing | 0000905148-26-003961 | View SEC Doc Filr Page |
| 4 | 2026-08-26 | 2026-08-17 | FORM 4 | 0000905148-26-003960 | View SEC Doc Filr Page |
| SCHEDULE 13G/A | 2026-08-14 | — | SCHEDULE 13G/A Filing | 0000919574-26-005481 | View SEC Doc Filr Page |
| 10-Q | 2026-08-12 | 2026-06-30 | 10-Q | 0001193125-26-346885 | View SEC Doc Filr Page |
| 8-K | 2026-08-12 | 2026-08-12 | 8-K | 0001193125-26-346857 | View SEC Doc Filr Page |
| 4 | 2026-07-24 | 2026-07-22 | OWNERSHIP DOCUMENT | 0001104659-26-086733 | View SEC Doc Filr Page |
| SCHEDULE 13D/A | 2026-07-24 | — | SCHEDULE 13D/A Filing | 0001104659-26-086728 | View SEC Doc Filr Page |
| 3 | 2026-07-06 | 2026-06-26 | FORM 3 | 0000905148-26-003168 | View SEC Doc Filr Page |
| 8-K | 2026-06-26 | 2026-06-22 | 8-K | 0001193125-26-285498 | View SEC Doc Filr Page |
| 4 | 2026-06-15 | 2026-06-11 | FORM 4 | 0000905148-26-002951 | View SEC Doc Filr Page |
| 3 | 2026-06-15 | 2026-06-11 | FORM 3 | 0000905148-26-002950 | View SEC Doc Filr Page |
| S-8 | 2026-06-12 | — | REGISTRATION STATEMENT | 0001213900-26-068286 | View SEC Doc Filr Page |
| 8-K | 2026-06-12 | 2026-06-09 | CURRENT REPORT | 0001213900-26-068264 | View SEC Doc Filr Page |
| 4 | 2026-06-11 | 2026-06-09 | FORM 4 | 0000905148-26-002921 | View SEC Doc Filr Page |
| 4 | 2026-06-11 | 2026-06-09 | FORM 4 | 0000905148-26-002920 | View SEC Doc Filr Page |
| 4 | 2026-06-11 | 2026-06-09 | FORM 4 | 0000905148-26-002919 | View SEC Doc Filr Page |
| 4 | 2026-05-20 | 2026-05-18 | 4 Filing | 0000905148-26-002571 | View SEC Doc Filr Page |
| 4 | 2026-05-20 | 2026-05-18 | 4 Filing | 0000905148-26-002570 | View SEC Doc Filr Page |
| 144 | 2026-05-18 | — | 144 Filing | 0000905148-26-002507 | View SEC Doc Filr Page |
| 144 | 2026-05-18 | — | 144 Filing | 0000905148-26-002506 | View SEC Doc Filr Page |
| SCHEDULE 13D/A | 2026-05-14 | — | SCHEDULE 13D/A Filing | 0001104659-26-061506 | View SEC Doc Filr Page |
| SCHEDULE 13G | 2026-05-13 | — | SCHEDULE 13G Filing | 0000919574-26-002914 | View SEC Doc Filr Page |
| 424B5 | 2026-05-12 | — | 424B5 | 0001193125-26-219518 | View SEC Doc Filr Page |
| 10-Q | 2026-05-12 | 2026-03-31 | 10-Q | 0001193125-26-219482 | View SEC Doc Filr Page |