COLB

COLUMBIA BANKING SYSTEM, INC.

State Commercial BanksNasdaqLarge accelerated filer

Total Trades

Buys

Sells

Largest Trade

$100K–$500K

Insiders

Institutional Funds

427

Inst. Value

$1M+

Activist Filings

Insider Trades

Insider	Title	Type	Value	Shares	Price	Date
Nixon Torran B	Senior Executive VP	SELL	$100K–$500K	4K	$28.55	Mar 5, 2026
GARDNER STEVEN R	Director	SELL	$100K–$500K	14K	$29.43	Feb 3, 2026
SEATON ELIZABETH WHITEHEAD	Director	BUY	$15K–$50K	3K	$18.48	Feb 7, 2024
Lund Randal Lee	Director	BUY	$15K–$50K	1K	$19.29	Feb 3, 2024
MACHUCA LUIS	Director	BUY	$100K–$500K	5K	$20.58	Feb 2, 2024
Deer Aaron James	Chief Strategy/Inn…	BUY	$15K–$50K	2K	$19.32	Feb 1, 2024
Nixon Torran B	Senior Executive VP	BUY	$50K–$100K	4K	$20.49	Feb 1, 2024
EERKES CRAIG D	Director	BUY	$15K–$50K	2K	$20.82	Feb 1, 2024
Merrywell Christopher	Senior Executive VP	BUY	$100K–$500K	5K	$21.09	Jan 31, 2024
Stein Clint	President, CEO	BUY	$100K–$500K	10K	$20.96	Jan 31, 2024
Numata S Mae Fujita	Director	BUY	$50K–$100K	2K	$21.09	Jan 31, 2024
Finkelstein Mark A	Director	BUY	$50K–$100K	4K	$20.87	Jan 31, 2024
Forrest Eric	Director	BUY	$50K–$100K	5K	$20.89	Jan 31, 2024
FARNSWORTH RON L	CFO	BUY	$50K–$100K	3K	$20.71	Jan 30, 2024
SCHULTZ JOHN F	Director	BUY	$100K–$500K	9K	$20.39	Jan 30, 2024
BARUFFI KUMI YAMAMOTO	General Counsel	BUY	$15K–$50K	854	$18.25	Jul 5, 2023
Deer Aaron James	Chief Strategy/Inn…	BUY	$15K–$50K	854	$18.25	Jul 5, 2023
EERKES CRAIG D	Director	BUY	$50K–$100K	2K	$21.01	May 24, 2023
BARUFFI KUMI YAMAMOTO	EVP General Counsel	BUY	$1K–$15K	232	$26.84	Jan 4, 2023
Lawson David C	EVP Chief H.R. Off…	BUY	$1K–$15K	264	$26.84	Jan 4, 2023
Lawson David C	EVP & Chief H.R. O…	BUY	$1K–$15K	271	$25.79	Jul 1, 2022
BARUFFI KUMI YAMAMOTO	EVP and General Co…	BUY	$1K–$15K	446	$25.79	Jul 1, 2022
Deer Aaron James	CFO	BUY	$15K–$50K	748	$25.79	Jul 1, 2022
EERKES CRAIG D	Director	BUY	$15K–$50K	2K	$28.52	Jun 13, 2022
Deer Aaron James	CFO	BUY	$50K–$100K	3K	$28.00	May 4, 2022
Deer Aaron James	CFO	BUY	$100K–$500K	3K	$33.45	Feb 24, 2022
Lawson David C	EVP & Chief H.R. O…	BUY	$1K–$15K	116	$29.45	Jan 5, 2022
BARUFFI KUMI YAMAMOTO	EVP and General Co…	BUY	$1K–$15K	186	$29.45	Jan 5, 2022

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Institutional Ownership

13F filings as of Dec 31, 2025 · 427 funds holding

Fund	Shares	Value	Type
VANGUARD GROUP INC	27.4M	$1M+	SH
STATE STREET CORP	12.8M	$1M+	SH
DIMENSIONAL FUND ADVISORS LP	12.7M	$1M+	SH
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	12.6M	$1M+	SH
AMERICAN CENTURY COMPANIES INC	9.4M	$1M+	SH
HoldCo Asset Management, LP	5.7M	$1M+	SH
MASSACHUSETTS FINANCIAL SERVICES CO /MA/	5.7M	$1M+	SH
GEODE CAPITAL MANAGEMENT, LLC	4.6M	$1M+	SH
NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	3.9M	$1M+	SH
BALYASNY ASSET MANAGEMENT L.P.	3.8M	$1M+	SH
NORGES BANK	3.7M	$1M+	SH
Channing Capital Management, LLC	3.3M	$1M+	SH
MORGAN STANLEY	2.7M	$1M+	SH
Fisher Asset Management, LLC	2.5M	$1M+	SH
COOKE & BIELER LP	2.3M	$1M+	SH
FIRST TRUST ADVISORS LP	1.9M	$1M+	SH
PZENA INVESTMENT MANAGEMENT LLC	1.8M	$1M+	SH
MANUFACTURERS LIFE INSURANCE COMPANY, THE	1.8M	$1M+	SH
NEW YORK STATE COMMON RETIREMENT FUND	1.3M	$1M+	SH
SYSTEMATIC FINANCIAL MANAGEMENT LP	1.2M	$1M+	SH