COLB EVP granted 8,002 restricted stock units

COLUMBIA BANKING SYSTEM, INC. executive Drew K. Anderson, EVP Chief Admin Officer, reported an equity award of 8,002 restricted stock units on February 18, 2026.

Rhea-AI Filing Summary

COLUMBIA BANKING SYSTEM, INC. executive Drew K. Anderson, EVP Chief Admin Officer, reported an equity award of 8,002 restricted stock units on February 18, 2026. The filing values the grant at $31.24 per unit. After this award, Anderson holds 53,113 derivative securities in total.

The restricted stock units were granted on February 18, 2026 and will vest in installments of 33.33% per year over three years. This represents a compensation-related acquisition of stock-based incentives rather than an open-market share purchase or sale.

Insider Trade Summary

Grant/Award: 8,002 shares

Grant/Award 1 txn

Insider Anderson Drew K

Role EVP Chief Admin Officer

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Unit	8,002	$31.24	$250K

Holdings After Transaction: Restricted Stock Unit — 53,113 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 Drew K. Anderson report?

COLB executive Drew K. Anderson reported receiving 8,002 restricted stock units as an equity award. The units were granted on February 18, 2026 at a reference value of $31.24 per unit as part of his stock-based compensation package.

How many COLB restricted stock units were granted to Drew K. Anderson?

Drew K. Anderson was granted 8,002 restricted stock units of Columbia Banking System, Inc. The Form 4 shows this as a grant or award acquisition, increasing his total derivative holdings to 53,113 units following the reported transaction.

What is the vesting schedule for Drew Anderson’s COLB restricted stock units?

The 8,002 restricted stock units granted to Drew Anderson vest over three years. According to the footnote, 33.33% of the award will vest each year, resulting in three equal annual installments until the units are fully vested.

What price per unit is shown for Drew Anderson’s COLB RSU grant?

The Form 4 lists a transaction price of $31.24 per restricted stock unit for Drew Anderson’s 8,002-unit award. This value represents the grant price used for reporting and does not indicate an open-market purchase or sale of common shares.

What is Drew Anderson’s total COLB derivative holdings after this grant?

After receiving 8,002 restricted stock units, Drew Anderson’s total reported derivative holdings are 53,113 units. This total reflects his direct ownership of derivative securities following the new equity award reported on the February 18, 2026 transaction date.

Is Drew Anderson’s COLB Form 4 transaction a buy or a sale of shares?

Drew Anderson’s COLB Form 4 transaction is an acquisition via grant, not an open-market buy or sale. The code “A” indicates a grant, award, or other acquisition of 8,002 restricted stock units as part of his compensation.

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

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Accepted by SEC EDGAR 02/20/2026 - 07:19 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^*

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)
02/18/2026

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		8,002		(1)	(1)	Common Stock	8,002	$31.24	53,113	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.