Brock Lakely

CIK: 0001740374

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)1 (16.7%)

Position reduction

Option Exercises (M)1 (16.7%)

Derivative conversions

Awards (A)1 (16.7%)

Compensation grants

Other (G, F, J, C, D, …)3 (50.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

COLB

COLUMBIA BANKING SYSTEM, INC.

Officer

Discretionary Trading P&L

Holdings

Transaction History (6 total)

COLB
COLUMBIA BANKING SYSTEM, INC.
Apr 15, 2026
Tax Payment(F)
Direct
396 shares at avg. $29.10$12K
COLB
COLUMBIA BANKING SYSTEM, INC.
Mar 13, 2026
Tax Payment(F)
Direct
211 shares at avg. $26.23$6K
COLB
COLUMBIA BANKING SYSTEM, INC.
Mar 13, 2026
Exercise(M)
Direct
846 shares at avg. $26.23$22K
COLB
COLUMBIA BANKING SYSTEM, INC.
Mar 13, 2026
Sale(S)
Direct
211 shares at avg. $26.23$6K
COLB
COLUMBIA BANKING SYSTEM, INC.
Mar 1, 2026
Tax Payment(F)
Direct
391 shares at avg. $28.45$11K
COLB
COLUMBIA BANKING SYSTEM, INC.
Feb 18, 2026
Award(A)
Restricted Stock Unit
Direct
5.6K shares at avg. $31.24-

		Type	Shares	Price		Ownership
Apr 15, 2026	COLB COLUMBIA BANKING SYSTEM, INC.	Tax Payment(F)	396	$29.10	$11,524	Direct
Mar 13, 2026	COLB COLUMBIA BANKING SYSTEM, INC.	Tax Payment(F)	211	$26.23	$5,535	Direct
Mar 13, 2026	COLB COLUMBIA BANKING SYSTEM, INC.	Exercise(M)	846	$26.23	$22,191	Direct
Mar 13, 2026	COLB COLUMBIA BANKING SYSTEM, INC.	Sale(S)	211	$26.23	$5,535	Direct
Mar 1, 2026	COLB COLUMBIA BANKING SYSTEM, INC.	Tax Payment(F)	391	$28.45	$11,124	Direct
Feb 18, 2026	COLB COLUMBIA BANKING SYSTEM, INC.	Award(A) Restricted Stock Unit	5,601	$31.24	-	Direct

1-6 of 6 transactions

About Lakely Brock

Lakely Brock (SEC CIK 0001740374) files insider reports with the SEC as EVP, Chief Accounting Officer of COLUMBIA BANKING SYSTEM, INC. (COLB).

Signal8 holds 6 ownership filings by Lakely Brock (1 Form 3, 5 Form 4), filed between Dec 1, 2025 and Apr 16, 2026. Those filings report 6 transactions, from Feb 18, 2026 to Apr 15, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Lakely Brock's filings is in TACOMA, WA.

Recent filings by Lakely Brock

Apr 15, 2026: Tax withholding of COLB shares (Form 4, code F).
Mar 13, 2026: Tax withholding of COLB shares (Form 4, code F).
Mar 13, 2026: Option exercise of COLB shares (Form 4, code M).
Mar 13, 2026: Open-market sale of COLB shares (Form 4, code S).
Mar 1, 2026: Tax withholding of COLB shares (Form 4, code F).

Other insiders filing for COLUMBIA BANKING SYSTEM, INC. (COLB)

GARDNER STEVEN R, Director
MACHUCA LUIS, Director
LAGOMARSINO SIMONE, Director
Giem Judi, EVP CHRO
Deer Aaron James, EVP Chief Strategy/Innov Offcr
Moore Devine David, EVP Chief Marketing Officer

How to read Form 4 transaction codes