Columbia Banking EVP receives 5,601 RSUs

Lakely Brock reported acquisition or exercise transactions in this Form 4 filing.

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Rhea-AI Filing Summary

Lakely Brock reported acquisition or exercise transactions in this Form 4 filing.

COLUMBIA BANKING SYSTEM, INC. executive Lakely Brock, EVP and Chief Accounting Officer, received a grant of 5,601 restricted stock units on February 18, 2026 at a reference price of $31.24 per unit. The award vests in three equal annual installments and brings Brock’s directly held RSUs to 10,656.

Insider Trade Summary

Grant/Award: 5,601 shares

Grant/Award 1 txn

Insider Lakely Brock

Role EVP, Chief Accounting Officer

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Unit	5,601	$31.24	$175K

Holdings After Transaction: Restricted Stock Unit — 10,656 contracts (Direct)

Footnotes (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 Lakely Brock report?

Lakely Brock reported receiving a grant of 5,601 restricted stock units. These units are a form of equity compensation that can convert into common shares if vesting conditions are met over time, aligning the executive’s interests with long-term company performance.

When do Lakely Brock’s new COLB restricted stock units vest?

The 5,601 restricted stock units granted to Lakely Brock vest 33.33% per year over three years. This means the award vests in three approximately equal annual installments, encouraging continued service and long-term alignment with Columbia Banking System’s shareholder value.

How many COLB restricted stock units does Lakely Brock now hold?

After this award, Lakely Brock directly holds 10,656 restricted stock units. This total includes the newly granted 5,601 units and any previously awarded unvested units, reflecting the executive’s accumulated equity-based compensation position in Columbia Banking System.

What was the reference price for Lakely Brock’s COLB RSU grant?

The 5,601 restricted stock units were granted at a reference price of $31.24 per unit. This price is typically used for valuation and disclosure purposes and does not represent cash paid by the executive, as the award is a stock-based compensation grant.

Is Lakely Brock’s COLB Form 4 transaction a purchase or an award?

The Form 4 reports an award, not an open‑market purchase. The transaction is coded as a grant or other acquisition of 5,601 restricted stock units, meaning the company granted the units as compensation rather than the executive buying shares in the market.

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

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Accepted by SEC EDGAR 02/20/2026 - 07:25 PM

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^*

Lakely Brock

(Last)

(First)

(Middle)

C/O COLUMBIA BANKING SYSTEM, INC.

1301 A STREET

(Street)

TACOMA

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 Accounting 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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Unit	⁽¹⁾	02/18/2026		A		5,601		⁽¹⁾	⁽¹⁾	Common Stock	5,601	$31.24	10,656	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.

Source: View Original Filing on SEC EDGAR