# EDGAR Filing Document

**Accession Number:** 0001481735
**File Stem:** 0000887343-23-000109
**Filing Date:** 2023-3
**Character Count:** 7588
**Document Hash:** cb60478b741d873dde39ca93aa4a0f05
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000887343-23-000109.hdr.sgml**: 20230303

**ACCESSION NUMBER**: 0000887343-23-000109

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20230301

**FILED AS OF DATE**: 20230303

**DATE AS OF CHANGE**: 20230303

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Terry Hilliard C. III
- **CENTRAL INDEX KEY:** 0001481735

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-20288
- **FILM NUMBER:** 23702961

**MAIL ADDRESS:**
- **STREET 1:** ONE SW COLUMBIA ST STE 1200
- **CITY:** PORTLAND
- **STATE:** OR
- **ZIP:** 97258
**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

## Ex-24

```
<pre>
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 November 15, 2022.

Signature: /s/ Hilliard C. Terry, III
Name: Hilliard C. Terry, III

Notarization/Certification
State of California County of Alameda

Signed or attested before me on November 15, 2022 by Hilliard C. Terry, III

/s/ Chamroeun Try
Notary/Agent/Subagent signature

Chamroeun Try
Notary printed or stamped name

01-12-2025
Notary expiration date
</pre>
```

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Terry Hilliard C. III<br><sub>(Last) (First) (Middle)</sub><br>C/O COLUMBIA BANKING SYSTEM, INC.<br>PO BOX 2156, MS 3100<br><sub>(Street)</sub><br>TACOMA, WA 98401-2156<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>COLUMBIA BANKING SYSTEM, INC. [ COLB ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2023-03-01 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director   [ ] 10% Owner<br>[ ] Officer (give title below)   [ ] Other (specify below)<br>_ _ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Common Stock | 39324 | D |  |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |

---

**Signature:** /s/ Andrea M. Newburn, Attorney-in-fact  
**Date:** 2023-03-03

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**