Columbia EVP sells 3,872 Columbia Banking shares

Columbia Banking System EVP Chief Marketing Officer David Moore Devine reported selling 3,872 shares of Common Stock in open-market transactions.

Rhea-AI Filing Summary

Columbia Banking System EVP Chief Marketing Officer David Moore Devine reported selling 3,872 shares of Common Stock in open-market transactions. The trades occurred on June 8, 2026 at prices around $29.77 per share. These were routine stock sales and he continues to hold a direct stake in the company after the transactions.

Insider Trade Summary

Net Seller: 3,872 shares

Net Sell 2 txns

Insider Moore Devine David

Role EVP Chief Marketing Officer

Sold 3,872 shs ($115K)

Type	Security	Shares	Price	Value
Sale	Common Stock	60	$29.77	$2K
Sale	Common Stock	3,812	$29.775	$114K

Holdings After Transaction: Common Stock — 18,636 shares (Direct)

Key Figures

Shares sold: 3,872 shares Sale price (main lot): $29.775 per share Sale price (second lot): $29.77 per share +1 more

4 metrics

Shares sold 3,872 shares Total Common Stock sold on June 8, 2026

Sale price (main lot) $29.775 per share 3,812-share open-market sale on June 8, 2026

Sale price (second lot) $29.77 per share 60-share open-market sale on June 8, 2026

Net buy/sell direction Net-sell of 3,872 shares Transaction summary for June 8, 2026

Key Terms

open-market sale, Common Stock, Form 4, Executive Vice President

4 terms

open-market sale financial

"transaction_action: "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

"security_title: "Common Stock" for both transactions"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Executive Vice President financial

"officer_title: "EVP Chief Marketing Officer""

An executive vice president is a high-ranking leader within a company who oversees major parts of its operations or strategies. Think of them as senior managers responsible for important areas, similar to a vice principal in a school hierarchy. Their role matters to investors because they help guide the company's success and decision-making at the top level.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Columbia Banking System (COLB) report for David Moore Devine?

Columbia Banking System reported that EVP Chief Marketing Officer David Moore Devine sold 3,872 shares of Common Stock. The Form 4 shows two open-market sale transactions on June 8, 2026, reflecting a net decrease of 3,872 shares in his holdings.

How many Columbia Banking System (COLB) shares did David Moore Devine sell and at what prices?

David Moore Devine sold a total of 3,872 Common Stock shares. One trade covered 3,812 shares at about $29.775 per share, and another covered 60 shares at about $29.77 per share, according to the Form 4 transaction details.

What role does David Moore Devine hold at Columbia Banking System (COLB)?

David Moore Devine serves as Executive Vice President and Chief Marketing Officer at Columbia Banking System. His Form 4 filing reflects personal transactions in the company’s Common Stock, categorized as direct ownership in the filing’s ownership fields.

Were the Columbia Banking System (COLB) insider transactions open-market sales?

Yes. The Form 4 classifies both transactions as open-market sales of Common Stock. The transaction code is “S” and the description states “Sale in open market or private transaction,” with prices around $29.77 per share on June 8, 2026.

Does the Form 4 show any option exercises or derivative trades for COLB by David Moore Devine?

No derivative transactions are listed for David Moore Devine in this Form 4. The derivativeSummary section is empty, and all reported activity involves non-derivative Common Stock sales, with no option exercises or conversions disclosed in this filing.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 06/10/2026 - 04:52 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Moore Devine David

(Last) (First) (Middle)

C/O COLUMBIA BANKING SYSTEM, INC.

1301 A STREET

(Street)

TACOMA WASHINGTON 98402

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
COLUMBIA BANKING SYSTEM, INC. [ COLB ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP Chief Marketing Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/08/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	06/08/2026		S		60	D	$29.77	22,448	D
Common Stock	06/08/2026		S		3,812	D	$29.775	18,636	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

	/s/ Andrea M. Newburn, Attorney-in-fact	06/10/2026
	** Signature of Reporting Person	Date
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.
* Form 4: SEC 1474 (03-26)