Columbia Banking director 401(k) sale of 13,725 shares

Columbia Banking, Inc. director Steven R. Gardner reported a sale of 13,725 shares of common stock at $29.43 per share through his self-directed 401(k) plan to meet mandatory liquidation requirements in connection with a rollover.

Rhea-AI Filing Summary

Columbia Banking, Inc. director Steven R. Gardner reported a sale of 13,725 shares of common stock at $29.43 per share through his self-directed 401(k) plan to meet mandatory liquidation requirements in connection with a rollover. Following this transaction, he is shown as indirectly beneficially owning 570,370 shares of common stock through a family trust. The filing also clarifies that 232,150 shares had previously been inadvertently reported as directly owned but are in fact indirectly owned via this family trust.

Insider Trade Summary

Net Seller: 13,725 shares

Net Sell 2 txns

Insider GARDNER STEVEN R

Role Director

Sold 13,725 shs ($404K)

Type	Security	Shares	Price	Value
Sale	Common Stock	13,725	$29.43	$404K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 0 shares (Indirect, by 401(k)); Common Stock — 570,370 shares (Indirect, by family trust)

Footnotes (2)

1. F1. Shares sold to satisfy mandatory liquidation requirements of the reporting person's self-directed 401(k) plan in connection with a rollover.
2. F2. 232,150 shares of the Issuer's common stock were previously inadvertently reported as directly owned by the reporting person and are indirectly beneficially owned by the reporting person via family trust.

FAQ

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

What insider transaction did COLB director Steven R. Gardner report?

Steven R. Gardner reported selling 13,725 shares of Columbia Banking, Inc. (COLB) common stock. The shares were sold at $29.43 per share through his self-directed 401(k) plan to satisfy mandatory liquidation requirements related to a rollover.

How many COLB shares does Steven R. Gardner beneficially own after the transaction?

After the reported activity, Steven R. Gardner is shown as indirectly beneficially owning 570,370 shares of Columbia Banking, Inc. common stock. These shares are held through a family trust, rather than directly in his own name.

Why were 13,725 COLB shares sold from Steven R. Gardner’s 401(k)?

The 13,725-share sale from Steven R. Gardner’s self-directed 401(k) plan was to satisfy mandatory liquidation requirements in connection with a rollover. This indicates the sale was driven by plan rules rather than a discretionary stock sale decision.

What correction did the Form 4 make regarding 232,150 COLB shares?

The Form 4 explains that 232,150 shares of Columbia Banking, Inc. common stock were previously inadvertently reported as directly owned. They are actually indirectly beneficially owned by Steven R. Gardner through a family trust.

Is Steven R. Gardner an officer or director of Columbia Banking, Inc. (COLB)?

Steven R. Gardner is identified as a director of Columbia Banking, Inc. (COLB) in the filing. He is not reported as a company officer or 10% owner on this Form 4.

How are Steven R. Gardner’s COLB holdings structured after this Form 4?

Following the reported 401(k) sale, Steven R. Gardner’s reported holdings consist of indirect beneficial ownership of 570,370 shares of COLB common stock, all held via a family trust rather than directly or through the 401(k).

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

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Accepted by SEC EDGAR 02/03/2026 - 05:13 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^*

GARDNER STEVEN R

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
01/30/2026

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	01/30/2026		S		13,725(1)	D	$29.43	0	I	by 401(k)
Common Stock								570,370(2)	I	by family trust

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 sold to satisfy mandatory liquidation requirements of the reporting person's self-directed 401(k) plan in connection with a rollover.

2. 232,150 shares of the Issuer's common stock were previously inadvertently reported as directly owned by the reporting person and are indirectly beneficially owned by the reporting person via family trust.

Remarks:

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