Kumi Yamamoto Baruffi

CIK: 0001619728

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)1 (5.3%)

Position reduction

Option Exercises (M)1 (5.3%)

Derivative conversions

Awards (A)6 (31.6%)

Compensation grants

Other (G, F, J, C, D, …)11 (57.9%)

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 (19 total)

COLB
COLUMBIA BANKING SYSTEM, INC.
Mar 13, 2026
Tax Payment(F)
Direct
937 shares at avg. $26.23$25K
COLB
COLUMBIA BANKING SYSTEM, INC.
Mar 13, 2026
Sale(S)
Direct
937 shares at avg. $26.23$25K
COLB
COLUMBIA BANKING SYSTEM, INC.
Mar 13, 2026
Exercise(M)
Direct
2.4K shares at avg. $26.23$62K
COLB
COLUMBIA BANKING SYSTEM, INC.
Mar 1, 2026
Tax Payment(F)
Direct
1.8K shares at avg. $28.45$51K
COLB
COLUMBIA BANKING SYSTEM, INC.
Feb 18, 2026
Award(A)
Restricted Stock Unit
Direct
8.3K shares at avg. $31.24-
COLB
COLUMBIA BANKING SYSTEM, INC.
Feb 15, 2026
Tax Payment(F)
Direct
1K shares at avg. $31.49$33K
COLB
COLUMBIA BANKING SYSTEM, INC.
Feb 2, 2026
Tax Payment(F)
Direct
2.1K shares at avg. $29.69$63K
COLB
COLUMBIA BANKING SYSTEM, INC.
Feb 2, 2026
Award(A)
Direct
5.1K shares at avg. $29.69$151K
COLB
COLUMBIA BANKING SYSTEM, INC.
Jan 20, 2026
Disposition(D)
Direct
632 shares-
COLB
COLUMBIA BANKING SYSTEM, INC.
Jan 20, 2026
Tax Payment(F)
Direct
1.5K shares at avg. $28.35$43K
COLB
COLUMBIA BANKING SYSTEM, INC.
Feb 28, 2025
Tax Payment(F)
Direct
1.8K shares at avg. $26.73$48K
COLB
COLUMBIA BANKING SYSTEM, INC.
Feb 25, 2025
Award(A)
Performance Restricted Stock Unit
Direct
3.6K shares at avg. $26.60-
COLB
COLUMBIA BANKING SYSTEM, INC.
Feb 25, 2025
Award(A)
Restricted Stock Unit
Direct
7.1K shares at avg. $26.60-
COLB
COLUMBIA BANKING SYSTEM, INC.
Feb 25, 2025
Award(A)
Performance Restricted Stock Unit
Direct
3.6K shares at avg. $26.60-
COLB
COLUMBIA BANKING SYSTEM, INC.
Feb 14, 2025
Tax Payment(F)
Direct
1K shares at avg. $27.41$28K
COLB
COLUMBIA BANKING SYSTEM, INC.
Feb 14, 2025
Award(A)
Direct
1K shares at avg. $27.41$28K
COLB
COLUMBIA BANKING SYSTEM, INC.
Feb 14, 2025
Tax Payment(F)
Direct
442 shares at avg. $27.41$12K
COLB
COLUMBIA BANKING SYSTEM, INC.
Jan 1, 2025
Tax Payment(F)
Direct
772 shares at avg. $27.01$21K
COLB
COLUMBIA BANKING SYSTEM, INC.
Jan 1, 2025
Tax Payment(F)
Direct
689 shares at avg. $27.01$19K

		Type	Shares	Price		Ownership
Mar 13, 2026	COLB COLUMBIA BANKING SYSTEM, INC.	Tax Payment(F)	937	$26.23	$24,578	Direct
Mar 13, 2026	COLB COLUMBIA BANKING SYSTEM, INC.	Sale(S)	937	$26.23	$24,578	Direct
Mar 13, 2026	COLB COLUMBIA BANKING SYSTEM, INC.	Exercise(M)	2,381	$26.23	$62,454	Direct
Mar 1, 2026	COLB COLUMBIA BANKING SYSTEM, INC.	Tax Payment(F)	1,799	$28.45	$51,182	Direct
Feb 18, 2026	COLB COLUMBIA BANKING SYSTEM, INC.	Award(A) Restricted Stock Unit	8,322	$31.24	-	Direct
Feb 15, 2026	COLB COLUMBIA BANKING SYSTEM, INC.	Tax Payment(F)	1,036	$31.49	$32,624	Direct
Feb 2, 2026	COLB COLUMBIA BANKING SYSTEM, INC.	Tax Payment(F)	2,110	$29.69	$62,646	Direct
Feb 2, 2026	COLB COLUMBIA BANKING SYSTEM, INC.	Award(A)	5,093	$29.69	$151,211	Direct
Jan 20, 2026	COLB COLUMBIA BANKING SYSTEM, INC.	Disposition(D)	632	-	$0	Direct
Jan 20, 2026	COLB COLUMBIA BANKING SYSTEM, INC.	Tax Payment(F)	1,508	$28.35	$42,752	Direct
Feb 28, 2025	COLB COLUMBIA BANKING SYSTEM, INC.	Tax Payment(F)	1,799	$26.73	$48,087	Direct
Feb 25, 2025	COLB COLUMBIA BANKING SYSTEM, INC.	Award(A) Performance Restricted Stock Unit	3,571	$26.60	-	Direct
Feb 25, 2025	COLB COLUMBIA BANKING SYSTEM, INC.	Award(A) Restricted Stock Unit	7,142	$26.60	-	Direct
Feb 25, 2025	COLB COLUMBIA BANKING SYSTEM, INC.	Award(A) Performance Restricted Stock Unit	3,571	$26.60	-	Direct
Feb 14, 2025	COLB COLUMBIA BANKING SYSTEM, INC.	Tax Payment(F)	1,031	$27.41	$28,260	Direct
Feb 14, 2025	COLB COLUMBIA BANKING SYSTEM, INC.	Award(A)	1,012	$27.41	$27,739	Direct
Feb 14, 2025	COLB COLUMBIA BANKING SYSTEM, INC.	Tax Payment(F)	442	$27.41	$12,115	Direct
Jan 1, 2025	COLB COLUMBIA BANKING SYSTEM, INC.	Tax Payment(F)	772	$27.01	$20,852	Direct
Jan 1, 2025	COLB COLUMBIA BANKING SYSTEM, INC.	Tax Payment(F)	689	$27.01	$18,610	Direct

1-19 of 19 transactions

About BARUFFI KUMI YAMAMOTO

BARUFFI KUMI YAMAMOTO (SEC CIK 0001619728) files insider reports with the SEC as EVP General Counsel, Corp Sec of COLUMBIA BANKING SYSTEM, INC. (COLB).

Signal8 holds 11 ownership filings by BARUFFI KUMI YAMAMOTO, all Form 4s, filed between Jan 3, 2025 and Mar 20, 2026. Those filings report 19 transactions, from Jan 1, 2025 to Mar 13, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on BARUFFI KUMI YAMAMOTO's filings is in TACOMA, WA.

Recent filings by BARUFFI KUMI YAMAMOTO

Mar 13, 2026: Tax withholding of COLB shares (Form 4, code F).
Mar 13, 2026: Open-market sale of COLB shares (Form 4, code S).
Mar 13, 2026: Option exercise of COLB shares (Form 4, code M).
Mar 1, 2026: Tax withholding of COLB shares (Form 4, code F).
Feb 18, 2026: Grant or award of COLB derivative securities (Form 4, code A).

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