# EDGAR Filing Document

**Accession Number:** 0000887343
**File Stem:** 0000887343-25-000271
**Filing Date:** 2025-11
**Character Count:** 7977
**Document Hash:** 63c3557c841e2e1549380c9fb93a2716
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000887343-25-000271.hdr.sgml**: 20251114

**ACCESSION NUMBER**: 0000887343-25-000271

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 14

**CONFORMED PERIOD OF REPORT**: 20251114

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20251114

**DATE AS OF CHANGE**: 20251114

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** COLUMBIA BANKING SYSTEM, INC.
- **CENTRAL INDEX KEY:** 0000887343
- **STANDARD INDUSTRIAL CLASSIFICATION:** STATE COMMERCIAL BANKS [6022]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 911422237
- **STATE OF INCORPORATION:** WA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-20288
- **FILM NUMBER:** 251484751

**BUSINESS ADDRESS:**
- **STREET 1:** 1301 A STREET
- **CITY:** TACOMA
- **STATE:** WA
- **ZIP:** 98402
- **BUSINESS PHONE:** 2533051900

**MAIL ADDRESS:**
- **STREET 1:** 1301 A STREET
- **CITY:** TACOMA
- **STATE:** WA
- **ZIP:** 98402

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** COLUMBIA BANKING SYSTEM INC
- **DATE OF NAME CHANGE:** 19930328

?xml version='1.0' encoding='ASCII'? colb-20251114

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**WASHINGTON, D.C. 20549**

**FORM 8-K** 

**CURRENT REPORT**

Pursuant to Section 13 or 15(d) of the Securities and Exchange Act of 1934

Date of Report: **November 14, 2025** 

(Date of earliest event reported)

**Columbia Banking System, Inc.** 

(Exact Name of Registrant as Specified in Its Charter)

---

| | | |
|:---|:---|:---|
| **<u>Washington</u>** | **<u>000-20288</u>** | **<u>91-1422237</u>** |
| (State or Other Jurisdiction of Incorporation or Organization) | (Commission File Number) | (I.R.S. Employer Identification Number) |

---

**1301 A Street** 

**Tacoma, Washington 98402-4200** 

(address of Principal Executive Offices) (Zip Code)

**(253) 305-1900** 

(Registrant's Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

[ ☐ ]&nbsp;&nbsp;&nbsp;&nbsp;Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

[ ☐ ]&nbsp;&nbsp;&nbsp;&nbsp;Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

[ ☐ ]&nbsp;&nbsp;&nbsp;&nbsp;Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

[ ☐ ]&nbsp;&nbsp;&nbsp;&nbsp;Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| <u>TITLE OF EACH CLASS</u> | <u>TRADING SYMBOL</u> | <u>NAME OF EXCHANGE</u> |
| **Common Stock, No Par Value** | **COLB** | **The Nasdaq Stock Market LLC** |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company [ ☐ ]

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. [ ]

------

**Item 8.01 Other Events.**

On November 14, 2025, Columbia Banking System, Inc., parent company of Columbia Bank, announced its Board of Directors has approved a quarterly cash dividend in the amount of $0.37 per common share, representing a 3% increase to the most recent Columbia dividend declaration. The dividend is payable December 15, 2025, to shareholders of record as of November 28, 2025. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference in its entirety.

---

| | |
|:---|:---|
| **Item 9.01** | **Financial Statements and Exhibits** |
| (d) | Exhibits. |
| | <u>[99.1 Press Release Announcing Quarterly Cash Dividend](colbex991dividendannouncem.htm)</u> |
| | 104 Cover Page Interactive Data File (embedded within the Inline XBRL document) |

---

------

**<u>SIGNATURES</u>**

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.**<br>(Registrant) |
| Dated: November 14, 2025 | By: <u>/s/ Kumi Yamamoto Baruffi</u><br>&nbsp;&nbsp;&nbsp;&nbsp; Kumi Yamamoto Baruffi<br>&nbsp;&nbsp;&nbsp;&nbsp; Executive Vice President, General Counsel |

---

## Exhibit 99.1

![newcbsilogo.jpg](newcbsilogo.jpg)

**Columbia Banking System Announces Increase to Common Share Dividend**

**TACOMA, Wash., November 14, 2025** – Columbia Banking System, Inc. ("Columbia" Nasdaq: COLB), parent company of Columbia Bank, today announced its Board of Directors has approved a quarterly cash dividend in the amount of $0.37 per common share, representing a 3% increase to the most recent Columbia dividend declaration. The dividend is payable December 15, 2025, to shareholders of record as of November 28, 2025.

"We are pleased to announce an increase to our regular dividend, providing another form of capital return to our shareholders that complements our recently announced $700 million share repurchase program," commented Clint Stein, President and CEO of Columbia. "Looking forward, we expect to produce exceptional profitability, which will result in meaningful capital generation over the coming quarters. Our strategic priorities, which include organic growth and balance sheet optimization, support our commitment to enhance long-term shareholder value in combination with a robust capital return platform."

**About Columbia**

Columbia Banking System, Inc. (Nasdaq: COLB) is headquartered in Tacoma, Washington and is the parent company of Columbia Bank, an award-winning western U.S. regional bank. Columbia Bank is the largest bank headquartered in the Northwest and one of the largest banks headquartered in the West with locations in Arizona, California, Colorado, Idaho, Nevada, Oregon, Utah, and Washington. Columbia Bank combines the resources, sophistication, and expertise of a national bank with a commitment to deliver superior, personalized service. The bank supports consumers and businesses through a full suite of services, including retail and commercial banking, Small Business Administration lending, institutional and corporate banking, and equipment leasing. Columbia Bank customers also have access to comprehensive investment and wealth management expertise as well as healthcare and private banking through Columbia Wealth Management. Learn more at <u>www.columbiabankingsystem.com</u><u>.</u>

**Investor Relations Contact:**

Jacquelynne "Jacque" Bohlen

<u>ir@columbiabank.com</u>

(503) 727-4100

**Note Regarding Forward Looking Statements**

This news release includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, which can be identified by words such as "may," "expected," "anticipate," "continue," or other comparable words. In addition, all statements other than statements of historical facts that address activities that Columbia expects or anticipates will or may occur in the future are forward-looking statements. Readers are encouraged to read the SEC reports of Columbia, particularly its Annual Report on Form 10-K for the Fiscal Year ended December 31, 2024 and its Quarterly Reports on Form 10-Q for the three months ended March 31, 2025, June 30, 2025, and September 30, 2025 for meaningful cautionary language discussing why actual results may vary materially from those anticipated by management.

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