Atara Biotherapeutics, Inc. SEC filings ATRA

Atara Biotherapeutics, Inc. has 1,002 filings in SEC EDGAR's recent list, going back to Jul 9, 2015. Its latest annual report, Form 10-K, was filed on Mar 16, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 12, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Aug 12, 2026 (results of operations). The company's fiscal year ends on December 31.

Form Description Filed Period
10-K Annual report Mar 16, 2026 Dec 31, 2025
10-K Annual report Mar 7, 2025 Dec 31, 2024
10-K Annual report Mar 28, 2024 Dec 31, 2023
10-K Annual report Feb 8, 2023 Dec 31, 2022
10-K Annual report Feb 28, 2022 Dec 31, 2021
10-K Annual report Mar 1, 2021 Dec 31, 2020
10-K Annual report Feb 27, 2020 Dec 31, 2019
10-K Annual report Feb 26, 2019 Dec 31, 2018
10-K Annual report Feb 27, 2018 Dec 31, 2017
10-K Annual report Mar 9, 2017 Dec 31, 2016
10-K Annual report Mar 4, 2016 Dec 31, 2015

Showing 11 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.

New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.

Company profile

Industry
Biological Products, (No Diagnostic Substances) (SIC 2836)
Listed as
ATRA (Nasdaq)
Fiscal year ends
December 31
Incorporated in
DE
Headquarters
Thousand Oaks, CA
SEC filer status
Non-accelerated filer, Smaller reporting company
SEC CIK
1604464

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Source: SEC EDGAR filings. This is company-reported data, not investment advice.