| 2026-07-23 | Earnings deck | Second Quarter 2026 |
| 2026-07-22 | Earnings deck | Second Quarter 2026 |
| 2026-06-30 | Press release | Columbia Banking System Announces Date of Second Quarter 2026 Earnings Release and Conference Call |
| 2026-05-15 | Press release | Columbia Banking System Announces $0.37 Per Common Share Dividend |
| 2026-04-30 | Press release | Columbia Bank Launches Franchise Banking Team |
| 2026-03-31 | Press release | Columbia Banking System Announces Date of First Quarter 2026 Earnings Release and Conference Call |
| 2026-02-20 | Press release | Columbia Banking System to Present at the RBC Capital Markets Conference |
| 2026-02-13 | Press release | Columbia Banking System Announces $0.37 Per Common Share Dividend |
| 2026-01-22 | Fact sheet | investor relations |
| 2026-01-21 | Press release | Clint Stein Elected Chair of Columbia Banking System Board of Directors |
| 2025-01-23 | Earnings deck | Fourth Quarter 2024 |
| 2023-10-17 | Earnings deck | COLUMBIA BANKING SYSTEM, INC. REPORTS THIRD QUARTER 2023 RESULTS |
| 2023-07-18 | Earnings deck | COLUMBIA BANKING SYSTEM, INC. REPORTS SECOND QUARTER 2023 RESULTS |
| 2023-01-24 | Press release | Fourth Quarter 2022 |
| 2022-10-20 | Press release | Columbia Banking System Announces Third Quarter 2022 Results |
| 2022-10-05 | Press release | Columbia Banking System Announces Regular Cash Dividend of $0.30 and Provides Third Quarter 2022 Earnings Release and Co |
| 2022-07-21 | Press release | Columbia Banking System Announces Second Quarter 2022 Results and Quarterly Cash Dividend |
| 2022-06-30 | Press release | Columbia Banking System Announces Second Quarter 2022 Earnings Release and Conference Call Date |
| 2022-04-21 | Press release | Columbia Banking System Announces First Quarter 2022 Results and Quarterly Cash Dividend |
| 2022-03-31 | Press release | Columbia Banking System Announces First Quarter 2022 Earnings Release and Conference Call Date |
| 2022-01-07 | Press release | Columbia Banking System Announces Fourth Quarter and Full-Year 2021 Earnings Release and Conference Call Date |
| 2021-10-28 | Press release | Columbia Banking System Announces Third Quarter 2021 Results |
| 2021-10-14 | Press release | Columbia Banking System Announces Third Quarter 2021 Earnings Release and Conference Call Date |
| 2021-07-12 | Press release | Columbia Banking System Announces Second Quarter 2021 Earnings Release and Conference Call Date |
| 2021-04-29 | Press release | Columbia Banking System Announces First Quarter 2021 Results and Quarterly Cash Dividend |
| 2021-04-09 | Press release | Columbia Banking System Announces First Quarter 2021 Earnings Release and Conference Call Date |
| 2021-01-28 | Press release | Columbia Banking System Announces Fourth Quarter and Full Year 2020 Results and Quarterly Cash Dividend |
| 2021-01-12 | Press release | Columbia Banking System Announces Fourth Quarter and Full-Year 2020 Earnings Release and Conference Call Date |
| 2020-10-29 | Press release | Columbia Banking System Announces Third Quarter 2020 Results and Quarterly Cash Dividend |
| 2020-10-08 | Press release | Columbia Banking System Announces Third Quarter 2020 Earnings Release and Conference Call Date |
| 2020-07-23 | Press release | Columbia Banking System Announces Second Quarter 2020 Results and Quarterly Cash Dividend |
| 2020-07-08 | Press release | Columbia Banking System Announces Second Quarter 2020 Earnings Release and Conference Call Date |
| 2020-04-30 | Press release | Columbia Banking System Announces First Quarter 2020 Results and Quarterly Cash Dividend |
| 2020-04-10 | Press release | Columbia Banking System Announces First Quarter 2020 Earnings Release and Conference Call Date |
| Press release | Q1 26 Earnings Release |