Columbia Banking sets Torran Nixon's role transition

Nixon’s advisory period is set to run through December 31, 2027, with salary based on his annual rate as of the transition date.

Rhea-AI Filing Summary

Columbia Banking System, Inc. and its subsidiary Columbia Bank entered a transition letter with Torran Nixon covering his transition from Co-President of Columbia Bank and Senior Executive Vice President of Columbia Banking System. The transition is set for July 1, 2027, or another mutually agreed date, when he will move into a senior advisor role through December 31, 2027.

While serving as Bank Co-President, Nixon will be eligible for a 2027 equity grant with a target grant date fair value no less than his 2026 grant. As an advisor, he will remain eligible for health and welfare benefits, vesting of outstanding equity awards under their terms, and salary based on his annual rate as of the Transition Date. Any 2027 annual incentive payout for his Bank Co-President service will depend on actual performance and be prorated through the Transition Date.

8-K Event Classification

2 items: 5.02, 9.01

2 items

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers Governance

Key personnel changes including departures, elections, or appointments of directors and executive officers.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, or exhibit attachments filed with this report.

Key Figures

Transition date: July 1, 2027, or another mutually agreed date Senior advisor period: Through December 31, 2027 2027 equity grant: Target grant date fair value no less than his 2026 grant

3 metrics

Transition date July 1, 2027, or another mutually agreed date Transition from Bank Co-President and Senior Executive Vice President roles

Senior advisor period Through December 31, 2027 Stated end date of the advisory period

2027 equity grant Target grant date fair value no less than his 2026 grant Eligibility applies while serving as Bank Co-President

Key Terms

target grant date fair value, annual incentive plan, Transition Date

3 terms

target grant date fair value financial

"a 2027 equity grant with a target grant date fair value"

annual incentive plan financial

"under the Company’s annual incentive plan"

Transition Date financial

"as of the Transition Date"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

When does Torran Nixon transition out of his COLB roles?

Torran Nixon is set to transition from his Co-President role at Columbia Bank and Senior Executive Vice President role at Columbia Banking System on July 1, 2027, or another mutually agreed date. He will then serve in a senior advisor role through December 31, 2027.

What compensation and benefits are covered by Torran Nixon’s COLB transition?

As a senior advisor, Nixon will remain eligible for health and welfare benefits, vesting of outstanding equity awards under their terms, and salary based on his annual rate as of the Transition Date. Any 2027 annual incentive payout for his Bank Co-President service depends on actual performance and is prorated through that date.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/27/2026 - 04:03 PM EDT Accepted by SEC EDGAR 10/27/2026 - 04:03 PM EDT Learn about SEC filing dates

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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 Exchange Act of 1934

Date of Report (Date of earliest event reported):

October 27, 2026

Columbia Banking System, Inc.

(Exact name of registrant as specified in its charter)

Washington		000-20288		91-1422237
(State or Other Jurisdiction of Incorporation)		(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:

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

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

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

[☐] 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:

TITLE OF EACH CLASS		TRADING SYMBOL		NAME OF EXCHANGE
Common Stock		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 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On October 27, 2026, Columbia Banking System, Inc. (the “Company”) and its subsidiary Columbia Bank (the “Bank”) entered into a transition letter (the “Transition Letter”) with Torran Nixon in connection with his transition from his role as Co-President of the Bank and Senior Executive Vice President of the Company (“Bank Co-President”) as of July 1, 2027 or such other mutually agreed date (the “Transition Date”) into a senior advisor role through December 31, 2027 (the “Retirement Date”).

Pursuant to the Transition Letter, during the period he serves as Bank Co-President, Mr. Nixon will be eligible to receive a 2027 equity grant with a target grant date fair value no less than his 2026 grant. While serving as an advisor, Mr. Nixon will continue to be eligible to participate in the Company’s health and welfare benefits, vest in his outstanding equity awards in accordance with their terms and receive salary based on his annual rate as of the Transition Date. Mr. Nixon will be eligible for a payout, if any, under the Company’s annual incentive plan for his service as Bank Co-President during 2027, determined based on actual performance and prorated to reflect his service through the Transition Date.

The foregoing description of the Transition Letter does not purport to be complete and is qualified in its entirety by reference to the full text of the Transition Letter, which is attached hereto as Exhibit 10.1 and incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits.

(d) EXHIBITS

10.1		Transition Letter, dated October 27, 2026, by and among the Company, the Bank and Mr. Torran Nixon
104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

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.
Date: October 27, 2026				By:		/s/ Kumi Yamamoto Baruffi
						Kumi Yamamoto Baruffi
						EVP, General Counsel and Corporate Secretary

Filing Exhibits & Attachments

4 documents

Agreements & Contracts

• EX-10.1 EX-10.1 18.3 KB

Other Documents

• EX-101 XBRL TAXONOMY EXTENSION SCHEMA 3.1 KB
• EX-101 XBRL TAXONOMY EXTENSION LABEL LINKBASE 16.8 KB
• EX-101 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE 10.6 KB