Columbia Banking (COLB) SVP reports forfeiture and tax share withholding

Rhea-AI Filing Summary

Columbia Banking System senior executive Torran B. Nixon reported routine changes in his COLB stock holdings. On January 20, 2026, he forfeited 1,717 shares of common stock at $0, tied to performance restricted stock units granted on February 21, 2023 that did not meet the issuer's total shareholder return target. On the same date, 3,873 shares were withheld at $28.35 per share to cover tax obligations from vesting restricted stock units.

After these transactions, Nixon directly owned 99,279 shares of common stock, and indirectly held 3,650 shares through the Nixon Family Trust and 1,855 shares through a 401(k) plan. He serves as Senior Executive Vice President of Columbia Banking System.

Insider Trade Summary

4 transactions reported

Mixed 4 txns

Insider Nixon Torran B

Role Senior Executive VP

Type	Security	Shares	Price	Value
Disposition	Common Stock	1,717	$0.00	--
Tax Withholding	Common Stock	3,873	$28.35	$110K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 103,152 shares (Direct); Common Stock — 3,650 shares (Indirect, by Nixon Family Trust)

Footnotes (1)

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 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.

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^*

Nixon Torran B

(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)
	Senior Executive VP

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		1,717(1)	D	$0	103,152	D
Common Stock	01/20/2026		F		3,873(2)	D	$28.35	99,279	D
Common Stock								3,650	I	by Nixon Family Trust
Common Stock								1,855	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

What insider transactions did COLB executive Torran B. Nixon report?

Torran B. Nixon reported forfeiting 1,717 COLB common shares and having 3,873 shares withheld on January 20, 2026, both related to equity compensation.

Why were 1,717 COLB shares forfeited by Torran B. Nixon?

The 1,717 shares were forfeited under performance restricted stock units granted on February 21, 2023 because the issuer’s total shareholder return performance target was not met.

What does the 3,873-share transaction at $28.35 for COLB represent?

The 3,873 COLB shares at $28.35 per share were withheld to satisfy Nixon’s tax withholding obligations when previously granted restricted stock units vested.

How many COLB shares does Torran B. Nixon own after these Form 4 transactions?

After the reported transactions, Nixon directly owned 99,279 COLB common shares, plus 3,650 shares indirectly through the Nixon Family Trust and 1,855 shares through a 401(k).

What is Torran B. Nixon’s role at Columbia Banking System (COLB)?

Torran B. Nixon is an officer of Columbia Banking System, serving as Senior Executive Vice President, as disclosed in the filing.

Are the reported COLB insider transactions open-market sales?

No. The filing shows forfeiture of performance-based shares and share withholding for taxes on vesting restricted stock units, not discretionary open-market sales.