Columbia Banking (NASDAQ: COLB) EVP reports tax-withholding share disposition

Rhea-AI Filing Summary

COLUMBIA BANKING SYSTEM, INC. executive Drew K. Anderson, EVP Chief Admin Officer, reported a tax-withholding disposition of 788 shares of common stock at $31.49 per share. This Form 4 shows the transaction reduced his directly held stake to 22,486 shares following the disposition.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Anderson Drew K

Role EVP Chief Admin Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	788	$31.49	$25K

Holdings After Transaction: Common Stock — 22,486 shares (Direct)

Footnotes (1)

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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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^*

Anderson Drew K

(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 Admin Officer

3. Date of Earliest Transaction (Month/Day/Year)
02/15/2026

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	02/15/2026		F		788	D	$31.49	22,486	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:

Remarks:

	/s/ Andrea M. Newburn, Attorney-in-fact	02/18/2026
	** 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 transaction did COLB executive Drew K. Anderson report?

Drew K. Anderson reported a tax-withholding disposition of 788 shares of Columbia Banking System common stock. The shares were valued at $31.49 per share and were used to satisfy tax obligations related to equity compensation, not an open-market sale.

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

Transaction code F indicates shares were disposed of to pay an exercise price or tax liability. In this case, 788 Columbia Banking System shares were surrendered for tax withholding, reflecting an administrative equity compensation event rather than a traditional market purchase or sale.

How many COLB shares did Drew K. Anderson hold after the reported transaction?

After the tax-withholding disposition, Drew K. Anderson directly held 22,486 shares of Columbia Banking System common stock. This post-transaction balance reflects his remaining direct ownership following the surrender of 788 shares to cover tax obligations tied to equity awards.

Was the COLB insider transaction an open-market sale of shares?

No, the transaction was not an open-market sale. It was a tax-withholding disposition, coded F, where 788 Columbia Banking System shares were delivered to satisfy tax liabilities associated with equity compensation rather than sold in the public market.

What role does Drew K. Anderson hold at Columbia Banking System (COLB)?

Drew K. Anderson serves as Executive Vice President and Chief Administrative Officer at Columbia Banking System. His Form 4 filing reflects a routine tax-related equity transaction associated with this officer role, rather than a discretionary buy or sell decision in the open market.