Columbia Banking System Files 8-K/A Amendment

Ticker: COLB · Form: 8-K/A · Filed: Sep 3, 2025 · CIK: 887343

Columbia Banking System, INC. 8-K/A Filing Summary
FieldDetail
CompanyColumbia Banking System, INC. (COLB)
Form Type8-K/A
Filed DateSep 3, 2025
Risk Levellow
Pages3
Reading Time4 min
Sentimentneutral

Sentiment: neutral

Topics: amendment, financial-statements, exhibits

TL;DR

COLUMBIA BANKING SYSTEM AMENDS PREVIOUS FILING - CHECK FOR UPDATED FINANCIALS.

AI Summary

Columbia Banking System, Inc. filed an 8-K/A on September 3, 2025, to amend a previous filing related to financial statements and exhibits. The amendment pertains to events occurring on or before September 2, 2025. The company, headquartered in Tacoma, Washington, is a commercial bank.

Why It Matters

This filing indicates an update or correction to previously submitted financial information or exhibits, which could be important for investors assessing the company's financial health and disclosures.

Risk Assessment

Risk Level: low — This is an amendment to a previous filing, likely for administrative or minor corrections, and does not appear to introduce new material risks.

Key Players & Entities

FAQ

What is the purpose of this 8-K/A filing?

This 8-K/A filing is an amendment to a previous report, specifically concerning financial statements and exhibits.

When was the earliest event reported in this filing?

The earliest event reported was on September 2, 2025.

What is the filing date of this 8-K/A?

This 8-K/A was filed on September 3, 2025.

Where is Columbia Banking System, Inc. headquartered?

Columbia Banking System, Inc. is headquartered in Tacoma, Washington.

What is the SIC code for Columbia Banking System, Inc.?

The Standard Industrial Classification (SIC) code for Columbia Banking System, Inc. is 6022, which corresponds to STATE COMMERCIAL BANKS.

Filing Stats: 895 words · 4 min read · ~3 pages · Grade level 12.1 · Accepted 2025-09-03 08:16:16

Filing Documents

01. Financial Statements and Exhibits

Item 9.01. Financial Statements and Exhibits. (a) Financial statements of businesses or funds acquired. The financial statements of Pacific Premier required by Item 9.01(a) of Form 8-K are attached hereto as Exhibit 99.1 and incorporated by reference into this Item 9.01(a). (b) Pro forma financial information. The pro forma financial information required by Item 9.01(b) of Form 8-K is attached hereto as Exhibit 99.2 and incorporated herein by reference into this Item 9.01(b). (d) Exhibits. The following exhibits are filed as part of this Current Report: Exhibit No. Description 23.1 Consent of Deloitte & Touche LLP, Independent Registered Public Accounting Firm for Pacific Premier Bancorp, Inc. 99.1 Audited consolidated balance sheets of Pacific Premier Bancorp, Inc. as of December 31, 2024 and December 31, 2023, the related consolidated statements of operations, comprehensive income, changes in stockholders' equity and cash flows of Pacific Premier Bancorp, Inc. for each of the three years in the period ended December 31, 2024, and the notes related thereto (incorporated by reference to Part II, Item 8 of Pacific Premier Bancorp, Inc.'s Annual Report on Form 10-K for the year ended December 31, 2024, filed with the SEC on February 28, 2025 (File No. 000-22193)). 99.2 Unaudited pro forma condensed combined balance sheet as of June 30, 2025, the unaudited pro forma condensed combined statement of income for the fiscal year ended December 31, 2024 and June 30, 2025, and the notes related thereto. 104 Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Columbia Banking System, Inc. (Registrant) Dated: September 3, 2025 By: /s/ Kumi Yamamoto Baruffi Kumi Yamamoto Baruffi EVP, General Counsel and Corporate Secretary

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