Columbia Banking (NASDAQ: COLB) director receives 3,949-share stock grant

Rhea-AI Filing Summary

COLUMBIA BANKING SYSTEM, INC. director Randal Lee Lund reported an acquisition of company stock as compensation. He received a grant of 3,949 shares of common stock at $0.0000 per share, bringing his direct holdings to 27,663 shares. He also reports 1,000 shares held indirectly through a family trust.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Lund Randal Lee

Role null

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	3,949	$0.00	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 27,663 shares (Direct, null); Common Stock — 1,000 shares (Indirect, by family trust)

Footnotes (1)

Key Figures

Stock grant: 3,949 shares Grant price: $0.0000 per share Direct holdings: 27,663 shares +1 more

4 metrics

Stock grant 3,949 shares Common Stock grant to director on May 14, 2026

Grant price $0.0000 per share Price for 3,949-share grant

Direct holdings 27,663 shares Total common shares directly held after grant

Indirect holdings 1,000 shares Common shares held indirectly by family trust

Key Terms

Common Stock, Grant, award, or other acquisition, Form 4, indirect, +1 more

5 terms

Common Stock financial

"security_title: "Common Stock""

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.

Grant, award, or other acquisition financial

"transaction_code_description: "Grant, award, or other acquisition""

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.

indirect financial

"ownership_type: "indirect""

family trust financial

"nature_of_ownership: "by family trust""

Form 4 Insider Transactions: What Each Field Means →

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^*

Lund Randal Lee

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/14/2026

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	05/14/2026		A		3,949	A	$0	27,663	D
Common Stock								1,000	I	by family trust

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	05/18/2026
	** 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)

FAQ

What insider transaction did COLB director Randal Lee Lund report?

Director Randal Lee Lund reported receiving a grant of 3,949 shares of Columbia Banking System common stock. The shares were acquired as a grant or award at $0.0000 per share, reflecting equity-based compensation rather than an open-market purchase.

How many COLB shares does Randal Lee Lund own after this Form 4?

After the grant, Randal Lee Lund directly holds 27,663 shares of Columbia Banking System common stock. In addition, the filing shows 1,000 shares held indirectly through a family trust, giving investors a clearer picture of his overall reported equity position.

Was the COLB insider transaction a market purchase or a stock grant?

The transaction was a stock grant, not a market purchase. The Form 4 describes it as a “grant, award, or other acquisition” of 3,949 shares at $0.0000 per share, indicating compensation-related equity rather than shares bought on the open market.

Does Randal Lee Lund report any indirect COLB share ownership?

Yes. The Form 4 shows 1,000 shares of Columbia Banking System common stock held indirectly “by family trust.” This entry is separate from his 27,663 directly held shares and highlights additional ownership through a related trust entity.

Were any Columbia Banking System shares sold in this Form 4 filing?

No share sales are reported in this Form 4. The filing shows one compensation-related stock grant of 3,949 shares to Randal Lee Lund and a separate holding entry for 1,000 shares held indirectly by a family trust, with no dispositions indicated.