Columbia (NASDAQ: COLB) EVP reports RSU forfeiture and tax withholding

Rhea-AI Filing Summary

Columbia Banking System EVP Chief Risk Officer Andrew H. Ognall reported equity award adjustments involving company common stock. On January 20, 2026, 559 shares of common stock were forfeited at $0 under performance restricted stock units granted on February 21, 2023 after the issuer’s total shareholder return target was not achieved at target levels. On the same date, 1,353 shares were withheld at $28.35 per share to cover his tax obligations tied to vesting restricted stock units. Following these transactions, Ognall beneficially owns 72,356 common shares directly and 2,635 common shares indirectly through a 401(k) plan.

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^*

OGNALL ANDREW H

(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 Risk 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		559(1)	D	$0	73,709	D
Common Stock	01/20/2026		F		1,353(2)	D	$28.35	72,356	D
Common Stock								2,635	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 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.
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

Who reported the insider transactions in COLB and what is their role?

The reporting person is Andrew H. Ognall, who serves as EVP Chief Risk Officer of Columbia Banking System, Inc. (COLB).

What happened to Andrew Ognall's performance restricted stock units at COLB?

559 shares of COLB common stock were forfeited on January 20, 2026 under performance restricted stock units granted on February 21, 2023 because the issuer’s total shareholder return performance target was not met at target.

Why were 1,353 COLB shares withheld from Andrew Ognall?

1,353 shares of COLB common stock were withheld on January 20, 2026 to satisfy Ognall’s tax withholding obligations related to the vesting of previously issued restricted stock units.

How many COLB shares does Andrew Ognall own after these transactions?

After the reported transactions, Andrew Ognall beneficially owns 72,356 shares of COLB common stock directly and an additional 2,635 shares indirectly through a 401(k) plan.

What do the transaction codes D and F mean in Andrew Ognall's COLB Form 4?

In this filing, code D reflects forfeiture of 559 shares under performance restricted stock units, while code F reflects withholding of 1,353 shares to cover tax obligations on vesting restricted stock units.

Are any of Andrew Ognall's COLB shares held indirectly?

Yes. The filing shows 2,635 shares of COLB common stock held indirectly by Andrew Ognall through a 401(k) plan.