Amendment to Columbia Banking System, Inc. 2016 401 Plus Plan (Deferred Compensation Plan), dated November 14, 2022

EX-10.20 7 a1020amendmentto2016401plu.htm AMENDED 2016 401 PLUS PLAN (DEFERRED COMPENSATION PLAN) Document

EXHIBIT 10.20

AMENDMENT
TO
COLUMBIA BANKING SYSTEM, INC.
2016 401 PLUS PLAN

THIS AMENDMENT, effective as of January 1, 2023 (the "Effective Date"), is hereby adopted by Columbia Banking System, Inc. (the "Company") on November 14, 2022.

Recitals

A.The Company established the 2016 401 Plus Plan (the "Plan") to provide deferred compensation for the directors and a select group of senior management and highly compensated employees, and with the directors and a select group of senior management and highly compensated employees of entities with which it is considered a single employer under §§ 414(b) or 414(c) of the U.S. Internal Revenue Code of 1986, as amended ("Code").

B.The Company now wishes to amend Section VI, Paragraph A of the Plan to adopt a new interest rate for purposes of calculating the Interest Crediting Rate because the LIBOR rate currently used to calculate the Interest Crediting Rate will be discontinued on the Effective Date.

Amendment

1.Interest Crediting Rate. Paragraph A of Section VI of the Plan is hereby amended to read as follows:

“At the time of amendment of the Plan, the agreed upon interest rate shall be equal to the three month SOFR rate plus 3.84%. The Plan Administrator shall annually review the calculation of the rate of interest that will be applied to DCAs (the “Interest Crediting Rate”) for appropriateness. The Interest Crediting Rate shall be adjusted quarterly for fluctuations in the three month SOFR rate. Plan participants will be notified of any adjustments to the Interest Crediting Rate.”

2.Other Terms Unchanged. Except as modified by this Amendment, the Plan remains in full force and effect.

COLUMBIA BANKING SYSTEMS, INC.

By: /s/ KUMI BARUFFI

Its: Corporate Secretary

4880-2884-3325.1