Columbia Banking System, Inc.

8-K Director or officer change; Regulation FD disclosure Jul 30, 2026 8-K Results of operations (earnings release); Regulation FD disclosure Jul 23, 2026 8-K Regulation FD disclosure Jul 1, 2026 8-K Other events May 15, 2026 8-K Shareholder vote results May 15, 2026 10-Q Quarter ended 2026-03-31 May 5, 2026 8-K Results of operations (earnings release); Regulation FD disclosure Apr 23, 2026 8-K Regulation FD disclosure Mar 31, 2026 10-K Fiscal year ended 2025-12-31 Feb 26, 2026 8-K Other events Feb 13, 2026 8-K Results of operations (earnings release); Regulation FD disclosure Jan 22, 2026 8-K Regulation FD disclosure Dec 31, 2025 8-K Director or officer change Nov 21, 2025 8-K Other events Nov 14, 2025 10-Q Quarter ended 2025-09-30 Nov 6, 2025 8-K Director or officer change; Regulation FD disclosure Nov 4, 2025 8-K Results of operations (earnings release); Regulation FD disclosure Oct 30, 2025 8-K/A Sep 3, 2025 8-K Completed an acquisition or disposition; Director or officer change; Regulation FD disclosure Sep 2, 2025 8-K Regulation FD disclosure Aug 29, 2025 8-K Other events Aug 15, 2025 10-Q Quarter ended 2025-06-30 Aug 6, 2025 8-K Regulation FD disclosure; Other events Aug 6, 2025 8-K Results of operations (earnings release); Regulation FD disclosure Jul 24, 2025 8-K Shareholder vote results; Regulation FD disclosure Jul 22, 2025 8-K Other events Jul 11, 2025 8-K Regulation FD disclosure Jun 30, 2025 8-K Other events May 16, 2025 8-K Shareholder vote results May 15, 2025 10-Q Quarter ended 2025-03-31 May 6, 2025 8-K Regulation FD disclosure May 5, 2025 8-K Entered a material agreement Apr 25, 2025 8-K Regulation FD disclosure; Other events Apr 23, 2025 8-K Results of operations (earnings release); Regulation FD disclosure Apr 23, 2025 8-K Director or officer change; Regulation FD disclosure Apr 2, 2025 8-K Regulation FD disclosure Mar 31, 2025 8-K Regulation FD disclosure Mar 27, 2025 10-K Fiscal year ended 2024-12-31 Feb 25, 2025 8-K Other events Feb 14, 2025 8-K Results of operations (earnings release); Regulation FD disclosure Jan 23, 2025