Columbia Banking (COLB) EVP awarded 8,322 restricted stock units as equity pay

Rhea-AI Filing Summary

BARUFFI KUMI YAMAMOTO reported acquisition or exercise transactions in this Form 4 filing.

Columbia Banking System executive receives stock-based compensation. EVP and General Counsel Kumi Yamamoto Baruffi was granted 8,322 restricted stock units at $31.24 per unit. The award vests 33.33% per year over three years, bringing her directly held RSU balance to 15,464 units after the grant.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider BARUFFI KUMI YAMAMOTO

Role EVP General Counsel, Corp Sec

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Unit	8,322	$31.24	$260K

Holdings After Transaction: Restricted Stock Unit — 15,464 shares (Direct)

Footnotes (1)

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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
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^*

BARUFFI KUMI YAMAMOTO

(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 General Counsel, Corp Sec

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		8,322		(1)	(1)	Common Stock	8,322	$31.24	15,464	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.

FAQ

What equity award did COLB executive Kumi Yamamoto Baruffi receive?

Kumi Yamamoto Baruffi received a grant of 8,322 restricted stock units. Each unit was valued at $31.24, representing stock-based compensation that will vest over time rather than an immediate cash payment or open-market stock purchase.

How do the new restricted stock units for COLB’s EVP vest over time?

The restricted stock units vest in three equal installments of 33.33% per year. The schedule spans three years from the February 18, 2026 grant date, encouraging long-term alignment between the executive’s compensation and Columbia Banking System shareholders.

What is Kumi Yamamoto Baruffi’s COLB RSU balance after this Form 4 transaction?

After the grant, Kumi Yamamoto Baruffi directly holds 15,464 restricted stock units. This total reflects the addition of 8,322 newly granted units and represents her outstanding RSU-based equity position reported in this Form 4 filing.

Does the COLB Form 4 show an insider buying or selling common stock?

The Form 4 reports an acquisition of restricted stock units, not an open-market stock trade. The transaction is coded as a grant or award, meaning it is part of compensation rather than a discretionary share purchase or sale by the executive.

Who is the reporting person in this COLB Form 4 insider filing?

The reporting person is Kumi Yamamoto Baruffi, Executive Vice President, General Counsel, and Corporate Secretary of Columbia Banking System, Inc. The filing details her receipt of a time-vested restricted stock unit award as part of her compensation package.

On what date were the COLB restricted stock units granted to the EVP?

The restricted stock units were granted on February 18, 2026. This grant date starts the three-year vesting schedule, under which 33.33% of the units vest each year, subject to the continued terms of the award agreement.