greeksoup/ stock research
Stock research / United States / COLB / Filings

Columbia Banking System, Inc. SEC filings

In the twelve months since 9 October 2025 Columbia Banking System, Inc. filed 25 documents with the SEC of the kinds listed here: 16 current reports (8-K), about 10 regulation fd disclosure; 4 other events; 4 results of operations; 3 officer or director change; 1 shareholder vote; 3 quarterly reports (10-Q), 2 employee plan annual reports (11-K), 1 annual report to shareholders (ARS), 1 additional proxy material (DEFA14A), 1 proxy statement (DEF 14A), 1 annual report (10-K). The latest, filed 30 September 2026: 8-K, regulation fd disclosure.

FiledFormWhat it was aboutPeriod or event dateFiling
30 September 20268-KRegulation FD disclosure30 September 2026EDGAR
14 August 20268-KOther events14 August 2026EDGAR
4 August 202610-Qquarterly report30 June 2026EDGAR
30 July 20268-KOfficer or director change, Regulation FD disclosure28 July 2026EDGAR
23 July 20268-KResults of operations, Regulation FD disclosure23 July 2026EDGAR
1 July 20268-KRegulation FD disclosure30 June 2026EDGAR
25 June 202611-Kemployee plan annual report31 December 2025EDGAR
15 May 20268-KOther events15 May 2026EDGAR
15 May 20268-KShareholder vote14 May 2026EDGAR
5 May 202610-Qquarterly report31 March 2026EDGAR
23 April 20268-KResults of operations, Regulation FD disclosure23 April 2026EDGAR
31 March 2026ARSannual report to shareholders31 December 2025EDGAR
31 March 2026DEFA14Aadditional proxy materialEDGAR
31 March 2026DEF 14Aproxy statement14 May 2026EDGAR
31 March 202611-Kemployee plan annual report31 December 2025EDGAR
31 March 20268-KRegulation FD disclosure31 March 2026EDGAR
26 February 202610-Kannual report31 December 2025EDGAR
13 February 20268-KOther events13 February 2026EDGAR
22 January 20268-KResults of operations, Regulation FD disclosure22 January 2026EDGAR
31 December 20258-KRegulation FD disclosure31 December 2025EDGAR
21 November 20258-KOfficer or director change19 November 2025EDGAR
14 November 20258-KOther events14 November 2025EDGAR
6 November 202510-Qquarterly report30 September 2025EDGAR
4 November 20258-KOfficer or director change, Regulation FD disclosure29 October 2025EDGAR
30 October 20258-KResults of operations, Regulation FD disclosure30 October 2025EDGAR
An 8-K is what a company files within four business days of a material event; the SEC numbers the events, and the words here are the SEC's own headings, shortened.
Read moreForm 4, Form 144, 13F and Schedule 13D and 13G have their own pages. Prospectus supplements and correspondence are not listed.

Source

The company's filing index on EDGAR, read from the SEC's submissions feed.

The same record on your computer

GreekSoup is also a free program for your own computer. It reads these same filings for the names you follow, refreshed as they land, with no account. One pasted line installs it.

Install