0000887343-23-000242.txt : 20230519 0000887343-23-000242.hdr.sgml : 20230519 20230519190030 ACCESSION NUMBER: 0000887343-23-000242 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20230518 FILED AS OF DATE: 20230519 DATE AS OF CHANGE: 20230519 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Finkelstein Mark A CENTRAL INDEX KEY: 0001537873 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 000-20288 FILM NUMBER: 23942016 MAIL ADDRESS: STREET 1: C/O BLUCORA, INC. STREET 2: 10900 NE 8TH ST., STE. 800 CITY: BELLEVUE STATE: WA ZIP: 98004 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 1 wf-form4_168453720361840.xml FORM 4 X0407 4 2023-05-18 0 0000887343 COLUMBIA BANKING SYSTEM, INC. COLB 0001537873 Finkelstein Mark A C/O COLUMBIA BANKING SYSTEM, INC. PO BOX 2156, MS 3100 TACOMA WA 98401-2156 1 0 0 0 0 Common Stock 2023-05-18 4 A 0 4028 0 A 20316 D /s/ Lisa M. White, Attorney-in-fact 2023-05-19 EX-24 2 ex-24.htm POA FINKELSTEIN M 2023-04-18

Power of Attorney

The undersigned hereby constitutes and appoints Kumi Yamamoto Baruffi, Ronald L. Farnsworth, Neal T. McLaughlin, Andrea M. Newburn and Lisa White as the undersigned's attorneys-in-fact to (1) execute and file for and on behalf of the undersigned, all reports of, and changes in, beneficial ownership by the undersigned of securities of Columbia Banking System, Inc. (the "Company") as may be required by Section 16(a) of the Securities Exchange Act of 1934 and the rules thereunder, and any other forms or reports the undersigned may be required to file in connection with the undersigned's ownership, acquisition, or disposition of securities of the Company, including forms required to generate codes for the Securities and Exchange Commission's electronic filing system; (2) do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute and file any such reports with the United States Securities and Exchange Commission and any stock exchange or similar authority; and (3) take any other action of any nature whatsoever in connection with the foregoing that, in the opinion of such attorneys-in-fact, may be of benefit to, and in the best interest of, or legally required of, the undersigned.

The undersigned hereby grants to said attorneys-in-fact, each acting alone, full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorneys-in-fact, or such attorneys-in-facts substitute or substitutes, shall lawfully do or cause to be done by the virtue of this Power of Attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned's responsibilities to comply with Section 16 of the Securities Exchange Act of 1934.

This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file reports pursuant to Section 16(a) of the Securities Exchange Act of 1934 and the rules thereunder with respect to the undersigned's holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the attorneys-in-fact. The undersigned acknowledges that none of the Company, Kumi Yamamoto Baruffi, Ronald L. Farnsworth, Neal T. McLaughlin, Andrea M. Newburn and Lisa White are assuming any of the undersigned's responsibilities to comply with Section 16 of the Securities and Exchange Act of 1934.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of April 18, 2023.

Signature: /s/ Mark Finkelstein
Name: Mark Finkelstein

Notarization/Certification
State of Washington County of Pierce

Signed or attested before me on 4/18/2023 by Mark Finkelstein.

/s/ Karina Busch
Notary/Agent/Subagent signature

Karina Busch
Notary printed or stamped name

7/1/2024
Notary expiration date