Columbia Banking exec has 2,980 shares withheld

Columbia Banking System Senior Executive VP Torran B. Nixon reported a tax-related share disposition.

Rhea-AI Filing Summary

Columbia Banking System Senior Executive VP Torran B. Nixon reported a tax-related share disposition. On Common Stock, 2,980 shares were withheld at $28.45 per share to cover taxes, a non-open-market transaction coded as a tax-withholding disposition.

After this event, Nixon directly held 102,710 common shares. Indirectly, 3,650 shares were held by a family trust and 1,876 shares were held through a 401(k) account, reflecting total reported beneficial ownership across direct and indirect accounts.

Insider Trade Summary

Exercise Price or Tax Liability: 2,980 shares

Exercise Price or Tax Liability 3 txns

Insider Nixon Torran B

Role Senior Executive VP

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	2,980	$28.45	$85K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 102,710 shares (Direct); Common Stock — 3,650 shares (Indirect, by family trust); Common Stock — 1,876 shares (Indirect, by 401(k))

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did COLB executive Torran Nixon report?

Torran B. Nixon reported a tax-withholding disposition of 2,980 shares of Columbia Banking System common stock. The shares were withheld at $28.45 per share to satisfy tax obligations, rather than sold in an open-market trade.

How many COLB shares does Torran Nixon hold after the reported transaction?

After the tax-withholding event, Torran Nixon directly held 102,710 Columbia Banking System common shares. He also reported indirect beneficial ownership of 3,650 shares through a family trust and 1,876 shares through a 401(k) plan.

Was the COLB insider transaction a market sale of shares?

The Form 4 shows a tax-withholding disposition, not an open-market sale. Shares were delivered to cover tax liabilities, as indicated by transaction code F for payment of exercise price or tax liability by delivering securities.

What does transaction code F mean in the COLB Form 4 filing?

Transaction code F indicates payment of an exercise price or tax liability by delivering securities. In this case, 2,980 Columbia Banking System shares were withheld at $28.45 per share specifically to satisfy tax obligations for Torran Nixon.

How much indirect ownership in COLB stock does Torran Nixon report?

Torran Nixon reports indirect ownership of 3,650 Columbia Banking System shares through a family trust and 1,876 shares through a 401(k) account. These holdings are in addition to his directly owned 102,710 common shares.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 03/02/2026 - 09:05 PM Learn about SEC filing dates

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)
03/01/2026

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	03/01/2026		F		2,980	D	$28.45	102,710	D
Common Stock								3,650	I	by family trust
Common Stock								1,876	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:

Remarks:

	/s/ Andrea M. Newburn, Attorney-in-fact	03/02/2026
	** 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.