Columbia Banking (COLB) EVP Frank reports PSU vesting and tax share withholding

Rhea-AI Filing Summary

Columbia Banking System EVP Chief Credit Officer Namdar Frank reported equity compensation activity in company stock. On February 2, 2026, he acquired 4,667 shares of common stock at $29.69 per share through the vesting of performance-based restricted stock units granted on February 21, 2023, which were tied to the issuer's relative return on tangible common equity for fiscal years 2023–2025.

On the same date, 2,383 shares were withheld at $29.69 per share to cover tax withholding obligations related to this vesting. After these transactions, Frank held 33,447 common shares directly and 4,113 shares indirectly through a 401(k) plan, reflecting his ongoing equity stake in the company.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Namdar Frank

Role EVP Chief Credit Officer

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	4,667	$29.69	$139K
Tax Withholding	Common Stock	2,383	$29.69	$71K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 35,830 shares (Direct); Common Stock — 4,113 shares (Indirect, by 401(k))

Footnotes (1)

1. Shares granted pursuant to the terms of the performance restricted stock units granted on February 21, 2023, which vested on February 2, 2026 based on to the issuer's relative return on tangible common equity for fiscal years 2023-2025 compared to a Compensation Committee approved group of peers. Represents withholding of shares of common stock to satisfy the reporting person's tax withholding obligations in connection with the shares granted pursuant to the terms of the performance restricted stock units vesting.

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
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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^*

Namdar Frank

(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 Credit Officer

3. Date of Earliest Transaction (Month/Day/Year)
02/02/2026

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	02/02/2026		A		4,667(1)	A	$29.69	35,830	D
Common Stock	02/02/2026		F		2,383(2)	D	$29.69	33,447	D
Common Stock								4,113	I	by 401(k)

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 granted pursuant to the terms of the performance restricted stock units granted on February 21, 2023, which vested on February 2, 2026 based on to the issuer's relative return on tangible common equity for fiscal years 2023-2025 compared to a Compensation Committee approved group of peers.

2. Represents withholding of shares of common stock to satisfy the reporting person's tax withholding obligations in connection with the shares granted pursuant to the terms of the performance restricted stock units vesting.

Remarks:

	/s/ Andrea M. Newburn, Attorney-in-fact	02/04/2026
	** 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.

FAQ

What did Columbia Banking System EVP Namdar Frank report on this Form 4 for COLB?

He reported equity compensation activity involving Columbia Banking common stock. Performance-based restricted stock units vested into 4,667 shares, and some shares were withheld to cover tax obligations, updating his direct and 401(k) share holdings in the company.

How many Columbia Banking (COLB) shares did Namdar Frank acquire on February 2, 2026?

He acquired 4,667 shares of Columbia Banking common stock. These shares resulted from performance restricted stock units granted in February 2023 that vested based on relative return on tangible common equity for fiscal years 2023–2025 versus a peer group.

Why were 2,383 COLB shares withheld in Namdar Frank’s Form 4 filing?

The 2,383 shares were withheld to satisfy Namdar Frank’s tax withholding obligations. They relate to the vesting of performance-based restricted stock units that converted into common shares, with the company retaining part of the shares instead of a separate cash tax payment.

What are Namdar Frank’s Columbia Banking shareholdings after these Form 4 transactions?

Following the reported transactions, he directly owns 33,447 shares of Columbia Banking common stock. In addition, he has an indirect holding of 4,113 shares through a 401(k) plan, reflecting both direct and retirement-related ownership positions.

How were the performance restricted stock units for COLB measured before vesting?

The units vested based on Columbia Banking’s relative return on tangible common equity. Performance was assessed over fiscal years 2023–2025 against a Compensation Committee–approved peer group, and the resulting performance determined the shares ultimately delivered to Namdar Frank.

What transaction codes appear in Namdar Frank’s COLB Form 4 and what do they mean?

The filing shows transaction code A for the acquisition of 4,667 shares from vesting performance stock units. It also shows code F for 2,383 shares withheld to cover taxes, indicating shares retained by the company instead of a separate tax payment by the executive.