COLB executive granted 16,645 restricted stock units

Merrywell Christopher reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Merrywell Christopher reported acquisition or exercise transactions in this Form 4 filing.

COLUMBIA BANKING SYSTEM, INC. Senior Executive VP Christopher Merrywell reported an equity compensation grant of 16,645 restricted stock units on 02/18/2026 at $31.24 per unit. After this award, he directly holds 56,304 units. The grant will vest 33.33% per year over three years.

Insider Trade Summary

Grant/Award: 16,645 shares

Grant/Award 1 txn

Insider Merrywell Christopher

Role Senior Executive VP

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Unit	16,645	$31.24	$520K

Holdings After Transaction: Restricted Stock Unit — 56,304 contracts (Direct)

Footnotes (1)

1. F1. Restricted stock units granted 02/18/2026. The grant will vest 33.33% per year over three years.

FAQ

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

What insider transaction did COLB executive Christopher Merrywell report?

Christopher Merrywell reported receiving 16,645 restricted stock units as an equity award. These units were granted at $31.24 each and increase his directly held units to 56,304, aligning part of his compensation with Columbia Banking System’s share performance over time.

When do Christopher Merrywell’s new COLB restricted stock units vest?

The restricted stock units granted to Christopher Merrywell on 02/18/2026 vest over three years. The award vests 33.33% per year, meaning portions of the 16,645 units become available annually, subject to the vesting schedule and any applicable service or employment conditions.

How many COLB restricted stock units does Merrywell hold after this grant?

Following the 16,645-unit grant, Christopher Merrywell directly holds 56,304 restricted stock units. This total reflects his updated equity-based position in Columbia Banking System and shows how ongoing awards can build executive exposure to the company’s long-term share performance.

Is Christopher Merrywell’s COLB Form 4 transaction a purchase or an award?

The Form 4 reflects an award, not an open-market purchase. The transaction is coded as a grant or other acquisition of 16,645 restricted stock units, representing equity compensation rather than buying existing shares in the market with personal funds.

What does transaction code "A" mean in the COLB Form 4 for Merrywell?

Transaction code "A" indicates a grant, award, or other acquisition. In this case, Christopher Merrywell received 16,645 restricted stock units as part of his compensation, which will vest in installments over three years instead of being immediately unrestricted.

Does the COLB Form 4 show direct or indirect ownership for Merrywell’s units?

The Form 4 lists Christopher Merrywell’s ownership of the restricted stock units as direct. After the 16,645-unit award, his directly held balance is reported as 56,304 units, reflecting his personal equity-based interest in Columbia Banking System, Inc.

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

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Accepted by SEC EDGAR 02/20/2026 - 07:30 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^*

Merrywell Christopher

(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)
02/18/2026

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

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
Restricted Stock Unit	(1)	02/18/2026		A		16,645		(1)	(1)	Common Stock	16,645	$31.24	56,304	D

Explanation of Responses:

1. Restricted stock units granted 02/18/2026. The grant will vest 33.33% per year over three years.

Remarks:

	/s/ Andrea M. Newburn, Attorney-in-fact	02/20/2026
	** 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.