0000887343-22-000094.txt : 20220404 0000887343-22-000094.hdr.sgml : 20220404 20220404153522 ACCESSION NUMBER: 0000887343-22-000094 CONFORMED SUBMISSION TYPE: 4/A PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20220325 FILED AS OF DATE: 20220404 DATE AS OF CHANGE: 20220404 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Lawson David C CENTRAL INDEX KEY: 0001606304 FILING VALUES: FORM TYPE: 4/A SEC ACT: 1934 Act SEC FILE NUMBER: 000-20288 FILM NUMBER: 22801844 MAIL ADDRESS: STREET 1: 1301 "A" STREET CITY: TACOMA STATE: WA ZIP: 98402 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: COLUMBIA BANKING SYSTEM, INC. CENTRAL INDEX KEY: 0000887343 STANDARD INDUSTRIAL CLASSIFICATION: STATE COMMERCIAL BANKS [6022] IRS NUMBER: 911422237 STATE OF INCORPORATION: WA FISCAL YEAR END: 1231 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 4/A 1 wf-form4a_164910090806523.xml FORM 4/A X0306 4/A 2022-03-25 2022-03-29 0 0000887343 COLUMBIA BANKING SYSTEM, INC. COLB 0001606304 Lawson David C 1301 A STREET TACOMA WA 98402 0 1 0 0 EVP & Chief H.R. Officer Common 2022-03-25 4 F 0 250 34.07 D 20677 D Correction to tax liability on vesting of award and the number of shares cancelled to cover taxes. /s/ Cathleen Dent on behalf of David C. Lawson 2022-04-04 EX-24 2 a2022powerofattorneyformdl.htm POA D LAWSON 2022

POWER OF ATTORNEY / CONFORMING STATEMENT

This Statement confirms that the undersigned, has authorized and designated Cathleen Dent, Karina Busch and Andrea Newburn each with the full power to act alone, to execute and file on the undersigned's behalf, all Form's 3, 4 and 5 (including any amendments thereto) that the undersigned may be required to file with the U. S. Securities and Exchange Commission as a result of the undersigned's ownership of or transactions in securities of Columbia Banking System, Inc. The authority of Cathleen Dent, Karina Busch and Andrea Newburn under this Statement shall continue until the undersigned is no longer required to file Forms 3, 4 and 5 with regard to his/her ownership of or transactions in securities of Columbia Banking System, Inc., unless earlier revoked in writing. The undersigned acknowledges that none of Columbia Banking System, Inc., Cathleen Dent, Karina Busch and Andrea Newburn is assuming any of the undersigned's responsibilities to comply with Section 16 of the Securities and Exchange Act of 1934.

The Power of Attorney shall remain in full force and effect until the undersigned is no longer subject to the reporting requirements of the Securities Exchange Act of 1934 and the rules thereunder, unless earlier revoked by the undersigned in a signed writing delivered to the attorney-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of February 24, 2022.

Signature: David C. Lawson

Name: David C. Lawson