As of November 6, 2026, Columbia Banking System, Inc. has reported 2 leadership change filings to the SEC under Item 5.02 of Form 8-K, from July 30, 2026 to October 27, 2026, naming 1 appointment. The latest filing names Simone Lagomarsino, appointed (Form 8-K, October 27, 2026).
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Columbia Banking System, Inc. reported changes in 2 filings among its directors and officers to the SEC on Form 8-K, Item 5.02, from 2026-07-30 to 2026-10-27. They name 1 person. Every row below is cited to the filing it comes from, and this page adds each new change as Columbia Banking System, Inc. files it.
Also on the record for Columbia Banking System, Inc.
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| August 13, 2026 | Stake report, Schedule 13G/A, by Wellington Management Group LLP | 4.1% of the class | 5%+ stakes | Source |
| April 29, 2026 | Stake report, Schedule 13G, by Vanguard Capital Management | 5.24% of the class | 5%+ stakes | Source |
| March 26, 2026 | Stake report, Schedule 13G/A, by The Vanguard Group | — | 5%+ stakes | Source |
| February 10, 2026 | Stake report, Schedule 13G, by Wellington Management Group LLP | 6.1% of the class | 5%+ stakes | Source |
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More on Columbia Banking System, Inc. and the records around it.
Columbia Banking System, Inc. elsewhere on the record
Companies that share a holder
- Wellington Management Group LLP also filed stake reports on 240 other companies: Hub Group, Inc. (Oct 2026), Latham Group, Inc. (Oct 2026), Redwood Trust, Inc. (Oct 2026)
- Vanguard Capital Management also filed stake reports on 1495 other companies: A10 Networks Inc (Oct 2026), Altisource Portfolio Solutions SA (Oct 2026), Alto Neuroscience Inc (Oct 2026)
- The Vanguard Group also filed stake reports on 2384 other companies: BellRing Brands, Inc. (Sep 2026), CAL-MAINE FOODS INC (Sep 2026), FTAI Aviation Ltd. (Sep 2026)
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Timeline
| Filed | In / out | Person | Role | Effective | Source |
|---|---|---|---|---|---|
| 2026-10-27 | Reported | not named in the filing | 8-K, 2026-10-27 | ||
| 2026-07-30 | In | 2026-09-01 | 8-K, 2026-07-30 |
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Reported
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.
Appointed: Simone Lagomarsino, effective 2026-09-01
On July 28, 2026, the Board of Directors of Columbia Banking System, Inc. (the "Company") appointed Simone Lagomarsino to the Board of Directors of the Company and, subject to approval by the Oregon Department of Consumer and Financial Services Division of Financial Regulation, the Board of Directors of Columbia Bank, the Company's wholly owned subsidiary, effective as of September 1, 2026 (the "Effective Date").
- Ms. Lagomarsino is an audit committee financial expert and at the Effective Date will serve on the Audit Committee and the Enterprise Risk Management Committee of the Company's Board of Directors.
- Ms. Lagomarsino, age 64, served as the President and a member of the board of directors of First Foundation Inc. (NYSE: FFWM) from July 2024 until its sale on April 1, 2026.
- Prior to joining First Foundation Inc., Ms. Lagomarsino was the President and Chief Executive Officer of Luther Burbank Corporation (Nasdaq: LBC) and its subsidiary Luther Burbank Savings, from January 2019 through February 2024.
- She also served on the board of directors of Luther Burbank Corporation and Luther Burbank Savings from December 2018 through February 2024.
- Ms. Lagomarsino served on the board of directors of the Federal Home Loan Bank of San Francisco from January 2013 through December 2024, and during her tenure she chaired the Audit, Risk and Regulatory Compliance Oversight Committees and was Chair of the board during 2022 and 2023.
- She also served on the board of directors of the Federal Reserve Bank of San Francisco from January 2022 through July 2024.
- Ms. Lagomarsino has a Bachelor of Arts in Economics from Claremont McKenna College and a Master of Business Administration in Finance from Claremont Graduate School.
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Where this comes from
A public company must file a current report on Form 8-K with the SEC within four business days when a director leaves or is elected, or when its chief executive, chief financial, chief accounting or chief operating officer, or another named executive, departs or is appointed. That disclosure goes under Item 5.02 of the report.
Every change on this page is taken from one of those filings and quoted in the company's own words, with a link to the filing, so it can be checked at the source. Where a filing names the person, the role and the date a change takes effect, they are shown beside the quote. Where it does not, the quote stands on its own. A filing states what changed; it rarely states why, and neither does this page.