Columbia Banking (COLB) EVP uses shares to cover tax withholding

Rhea-AI Filing Summary

COLUMBIA BANKING SYSTEM, INC. executive Frank Namdar, EVP Chief Credit Officer, reported a tax-withholding disposition of 1,169 shares of common stock at $31.49 per share. This transaction satisfied tax obligations rather than representing an open-market sale. Following the transaction, he directly held 32,278 shares and indirectly held 4,126 shares through a 401(k) plan.

Insights

Equity compensation analyst

Tax withholding on equity, not an open-market sale.

The filing shows EVP Chief Credit Officer Frank Namdar had 1,169 shares of COLUMBIA BANKING SYSTEM, INC. common stock withheld at $31.49 per share to cover tax obligations linked to equity compensation.

This Form 4 uses transaction code F, which typically indicates payment of taxes or exercise costs with shares, rather than a discretionary sale into the market. After this withholding, he reports 32,278 shares held directly and 4,126 shares held indirectly via 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
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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)
02/15/2026

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		1,169	D	$31.49	32,278	D
Common Stock								4,126	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	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 Frank Namdar report?

Frank Namdar reported a tax-withholding disposition of 1,169 shares of Columbia Banking System common stock. The shares were withheld at $31.49 per share to satisfy tax obligations related to equity compensation, rather than sold in an open-market transaction.

Does the COLB Form 4 show an open-market sale by Frank Namdar?

No, the Form 4 indicates a tax-withholding disposition using transaction code F, not an open-market sale. Shares were withheld at $31.49 per share to cover taxes tied to equity awards, a common administrative step for equity compensation.

How many COLB shares does Frank Namdar hold after this Form 4 transaction?

After the tax-withholding disposition, Frank Namdar reports owning 32,278 Columbia Banking System shares directly. He also reports indirect ownership of 4,126 shares through a 401(k) plan, reflecting both personal and retirement-related holdings following the reported transaction.

What does transaction code F mean in the COLB Form 4 for Frank Namdar?

Transaction code F signifies payment of an exercise price or tax liability by delivering securities. In this case, 1,169 Columbia Banking System shares were withheld at $31.49 per share to satisfy tax obligations related to equity compensation, instead of a standard buy or sell trade.

How is indirect ownership reported for Frank Namdar in the COLB filing?

The Form 4 shows indirect ownership of 4,126 Columbia Banking System shares held "by 401(k)." This means those shares are in a 401(k) retirement plan associated with Namdar, separate from his 32,278 directly held shares after the reported tax-withholding transaction.