ADTRAN Holdings, Inc.

8-K Entered a material agreement; Terminated a material agreement; Took on a direct financial obligation Jul 23, 2026 8-K Results of operations (earnings release); Regulation FD disclosure Jul 22, 2026 8-K Director or officer change; Other events Jun 26, 2026 8-K Amended charter or bylaws; Shareholder vote results May 18, 2026 10-Q Quarter ended 2026-03-31 May 5, 2026 8-K Results of operations (earnings release); Regulation FD disclosure May 5, 2026 8-K Director or officer change Apr 7, 2026 10-K Fiscal year ended 2025-12-31 Feb 26, 2026 8-K Results of operations (earnings release); Regulation FD disclosure Feb 26, 2026 8-K Results of operations (earnings release); Regulation FD disclosure Jan 22, 2026 8-K Director or officer change Dec 11, 2025 10-Q Quarter ended 2025-09-30 Nov 4, 2025 8-K Results of operations (earnings release); Regulation FD disclosure Nov 4, 2025 8-K Entered a material agreement; Took on a direct financial obligation; Unregistered sale of equity Sep 22, 2025 8-K Entered a material agreement; Other events Sep 17, 2025 10-Q Quarter ended 2025-06-30 Aug 5, 2025 8-K Results of operations (earnings release); Regulation FD disclosure Aug 5, 2025 8-K Shareholder vote results; Other events Jul 30, 2025 8-K/A Results of operations (earnings release); Regulation FD disclosure Jul 17, 2025 8-K Results of operations (earnings release); Regulation FD disclosure Jul 16, 2025 8-K Results of operations (earnings release) May 28, 2025 8-K Other events May 27, 2025 10-Q Quarter ended 2025-03-31 May 20, 2025 10-K/A Fiscal year ended 2024-12-31 May 20, 2025 8-K Previously issued financials not reliable; Other events May 13, 2025 8-K Entered a material agreement May 12, 2025 8-K Results of operations (earnings release); Regulation FD disclosure May 8, 2025 8-K Regulation FD disclosure Apr 16, 2025 8-K Director or officer change; Regulation FD disclosure Mar 7, 2025 10-K Fiscal year ended 2024-12-31 Mar 3, 2025 8-K Results of operations (earnings release); Regulation FD disclosure Feb 27, 2025 10-Q Quarter ended 2024-09-30 Nov 12, 2024 8-K Results of operations (earnings release); Regulation FD disclosure Nov 7, 2024 8-K Director or officer change Aug 30, 2024 10-Q Quarter ended 2024-06-30 Aug 9, 2024 8-K Results of operations (earnings release); Regulation FD disclosure Aug 6, 2024 8-K Director or officer change Aug 2, 2024 8-K Entered a material agreement; Took on a direct financial obligation Jun 10, 2024 10-Q Quarter ended 2024-03-31 May 10, 2024 8-K Director or officer change; Shareholder vote results May 9, 2024