Atara Biotherapeutics, Inc.

8-K Director or officer change Jun 26, 2026 8-K Director or officer change; Shareholder vote results Jun 12, 2026 10-Q Quarter ended 2026-03-31 May 12, 2026 8-K May 12, 2026 8-K Other events May 7, 2026 8-K Delisting notice or listing-rule failure May 1, 2026 10-K Fiscal year ended 2025-12-31 Mar 16, 2026 8-K Results of operations (earnings release) Mar 16, 2026 8-K Other events Mar 12, 2026 8-K Other events Mar 3, 2026 8-K Entered a material agreement; Unregistered sale of equity; Other events Feb 23, 2026 8-K Results of operations (earnings release); Other events Jan 12, 2026 8-K Entered a material agreement Jan 2, 2026 10-Q Quarter ended 2025-09-30 Nov 12, 2025 8-K Results of operations (earnings release) Nov 12, 2025 8-K Exit or disposal costs Oct 7, 2025 8-K Director or officer change Sep 4, 2025 10-Q Quarter ended 2025-06-30 Aug 11, 2025 8-K Results of operations (earnings release) Aug 11, 2025 8-K Results of operations (earnings release); Other events Jul 14, 2025 8-K Shareholder vote results Jun 11, 2025 8-K Other events May 16, 2025 10-Q Quarter ended 2025-03-31 May 15, 2025 8-K Results of operations (earnings release); Director or officer change May 15, 2025 8-K Exit or disposal costs May 12, 2025 8-K Other events May 6, 2025 8-K Entered a material agreement Apr 4, 2025 8-K Director or officer change Mar 31, 2025 10-K Fiscal year ended 2024-12-31 Mar 7, 2025 8-K Results of operations (earnings release) Mar 7, 2025 8-K Exit or disposal costs Mar 3, 2025 8-K Exit or disposal costs Jan 27, 2025 8-K Other events Jan 21, 2025 8-K Results of operations (earnings release); Other events Jan 16, 2025 8-K Amended charter or bylaws Dec 23, 2024 10-Q Quarter ended 2024-09-30 Nov 12, 2024 8-K Results of operations (earnings release); Director or officer change Nov 12, 2024 8-K Director or officer change Oct 15, 2024 8-K Director or officer change; Other events Sep 3, 2024 10-Q Quarter ended 2024-06-30 Aug 12, 2024