Columbia Banking (COLB) EVP logs share forfeiture and tax withholding

Rhea-AI Filing Summary

Columbia Banking, Inc. executive vice president and chief marketing officer David Moore Devine reported routine equity compensation adjustments in common stock on January 20, 2026. The filing shows 260 shares of common stock were forfeited under performance restricted stock units that were granted on February 21, 2023 because the company’s total shareholder return target was not met at target. An additional 628 shares of common stock were withheld to cover tax withholding obligations tied to the vesting of previously issued restricted stock units. Following these transactions, he directly holds 22,137 shares of Columbia Banking common stock.

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

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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 WA 98402

(City) (State) (Zip)

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

3. Date of Earliest Transaction (Month/Day/Year)
01/20/2026

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

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

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

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	01/20/2026		D		260(1)	D	$0	22,765	D
Common Stock	01/20/2026		F		628(2)	D	$28.35	22,137	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:

1. Shares forfeited pursuant to the terms of the performance restricted stock units granted on February 21, 2023 and reported on the reporting person's Form 4 filed on February 21, 2023 (in accordance with Rule 16b-3(e)) due to the issuer's total shareholder return performance target not being met at target.

2. Represents withholding of shares of common stock to satisfy the reporting person's tax withholding obligations in connection with the vesting of previously issued restricted stock units.

Remarks:

	/s/ Andrea M. Newburn, Attorney-in-fact	01/22/2026
	** 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.
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FAQ

What insider activity did COLB report for David Moore Devine?

The Form 4 shows Columbia Banking, Inc. EVP and chief marketing officer David Moore Devine had two equity-related transactions in common stock on January 20, 2026: a forfeiture of shares tied to performance restricted stock units and a share withholding for taxes on restricted stock unit vesting.

How many Columbia Banking (COLB) shares were forfeited in this Form 4?

The filing reports that 260 shares of Columbia Banking, Inc. common stock were forfeited pursuant to the terms of performance restricted stock units granted on February 21, 2023, after the company’s total shareholder return performance target was not met at target.

Why were 260 COLB shares forfeited by the executive?

According to the footnote, the 260 shares were forfeited under the terms of performance restricted stock units granted on February 21, 2023 because the issuer’s total shareholder return performance target was not achieved at the target level.

What does the 628-share transaction for COLB common stock represent?

The disposition of 628 shares of Columbia Banking, Inc. common stock is described as withholding of shares to satisfy David Moore Devine’s tax withholding obligations in connection with the vesting of previously issued restricted stock units.

How many COLB shares does David Moore Devine own after these transactions?

After the reported transactions on January 20, 2026, David Moore Devine directly owns 22,137 shares of Columbia Banking, Inc. common stock.

Does this COLB Form 4 involve any derivative securities?

The Form 4 includes a table for derivative securities, but no derivative transactions are reported there; the disclosed activity relates only to non-derivative common stock tied to restricted stock units and tax withholding.