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C

COLB

Nasdaq

COLUMBIA BANKING SYSTEM, INC.

Latest disclosureSeptember 15, 2026
Insider score Why 4?
4/ 100
Qualifying buys · 30d
$0

1 purchases · 2 sales

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Insider transactions 21

Limited filing history
All21Buying1Selling2Other18
Filters

Last 30 daysNo qualifying insider buying. No qualifying insider sales.

18 of 21 trades · April 15, 2026 – September 14, 2026Incomplete history: this shows the filings imported so far, not every filing ever made. Dates are trade dates. Filters affect this table only.

Showing the first 6 of 18 trades on this page.

Award disclosed

Luis Machuca

Director

Deferred Compensation Phantom Stock

Derivative security · not the ordinary share price.

Value context
$18.11K
Reported price
$30.48 / derivative unit
Traded September 14, 2026Filed September 15, 2026SEC filing
Award disclosed

Steven R. Gardner

Director

Common Stock

Value context
Non-cash award
Reported price
Award · no purchase price
Understand this price

The filing reports a zero transaction price for this award. It does not mean the awarded securities have no market value.

Traded September 4, 2026Filed September 8, 2026SEC filing
Award disclosed

Simone Lagomarsino

Director

Common Stock

Value context
Non-cash award
Reported price
Award · no purchase price
Understand this price

The filing reports a zero transaction price for this award. It does not mean the awarded securities have no market value.

Traded September 2, 2026Filed September 4, 2026SEC filing
Exercise or conversion

Judi Giem

EVP CHRO

Common Stock

Value context
$78.23K
Reported price
$32.69 / share
Traded August 14, 2026Filed August 18, 2026SEC filing
Tax or exercise withholding

Judi Giem

EVP CHRO

Common Stock

Value context
$21.02K
Reported price
$32.69 / share
Traded August 14, 2026Filed August 18, 2026SEC filing
Exercise or conversion

Judi Giem

EVP CHRO

Restricted Stock Unit

Derivative security · not the ordinary share price.

Value context
Not a separate purchase
Exercise / conversion price
Exercise / conversion price not reported
Understand this price

This row records an option exercise or conversion. The derivative transaction price is separate from the exercise price; it is not the stock's market price. Its row value is not shown as another stock purchase.

Traded August 14, 2026Filed August 18, 2026SEC filing
Award disclosed

Luis Machuca

Director

Deferred Compensation Phantom Stock

Derivative security · not the ordinary share price.

Value context
$17.89K
Reported price
$31.78 / derivative unit
Traded June 15, 2026Filed June 16, 2026SEC filing
Award disclosed

Anddria Varnado

Director

Common Stock

Value context
Non-cash award
Reported price
Award · no purchase price
Understand this price

The filing reports a zero transaction price for this award. It does not mean the awarded securities have no market value.

Traded May 14, 2026Filed May 18, 2026SEC filing
Award disclosed

Hilliard C. Terry III

Director

Common Stock

Value context
Non-cash award
Reported price
Award · no purchase price
Understand this price

The filing reports a zero transaction price for this award. It does not mean the awarded securities have no market value.

Traded May 14, 2026Filed May 18, 2026SEC filing
Award disclosed

Jaynie M. Studenmund

Director

Common Stock

Value context
Non-cash award
Reported price
Award · no purchase price
Understand this price

The filing reports a zero transaction price for this award. It does not mean the awarded securities have no market value.

Traded May 14, 2026Filed May 18, 2026SEC filing
Award disclosed

Elizabeth Whitehead Seaton

Director

Common Stock

Value context
Non-cash award
Reported price
Award · no purchase price
Understand this price

The filing reports a zero transaction price for this award. It does not mean the awarded securities have no market value.

Traded May 14, 2026Filed May 18, 2026SEC filing
Award disclosed

John F. Schultz

Director

Common Stock

Value context
Non-cash award
Reported price
Award · no purchase price
Understand this price

The filing reports a zero transaction price for this award. It does not mean the awarded securities have no market value.

Traded May 14, 2026Filed May 18, 2026SEC filing
Award disclosed

M. Christian Mitchell

Director

Common Stock

Value context
Non-cash award
Reported price
Award · no purchase price
Understand this price

The filing reports a zero transaction price for this award. It does not mean the awarded securities have no market value.

Traded May 14, 2026Filed May 18, 2026SEC filing
Award disclosed

Luis Machuca

Director

Common Stock

Value context
Non-cash award
Reported price
Award · no purchase price
Understand this price

The filing reports a zero transaction price for this award. It does not mean the awarded securities have no market value.

Traded May 14, 2026Filed May 18, 2026SEC filing
Award disclosed

Randal Lee Lund

Director

Common Stock

Value context
Non-cash award
Reported price
Award · no purchase price
Understand this price

The filing reports a zero transaction price for this award. It does not mean the awarded securities have no market value.

Traded May 14, 2026Filed May 18, 2026SEC filing
Award disclosed

Eric Forrest

Director

Common Stock

Value context
Non-cash award
Reported price
Award · no purchase price
Understand this price

The filing reports a zero transaction price for this award. It does not mean the awarded securities have no market value.

Traded May 14, 2026Filed May 18, 2026SEC filing
Award disclosed

Mark A. Finkelstein

Director

Common Stock

Value context
Non-cash award
Reported price
Award · no purchase price
Understand this price

The filing reports a zero transaction price for this award. It does not mean the awarded securities have no market value.

Traded May 14, 2026Filed May 18, 2026SEC filing
Tax or exercise withholding

Brock Lakely

EVP, Chief Accounting Officer

Common Stock

Value context
$11.52K
Reported price
$29.10 / share
Traded April 15, 2026Filed April 16, 2026SEC filing
Reporting insiderSecurity / transactionAmount / priceValueTraded / disclosedSource
DirectorDeferred Compensation Phantom StockGrant or awardDerivative units594$30.48 / derivative unit$18.11KSep 14Filed Sep 15 · 1d laterSEC filing
DirectorCommon StockGrant or award2,577Award · no purchase priceNon-cash awardSep 4Filed Sep 8 · 4d laterSEC filing
DirectorCommon StockGrant or award2,670Award · no purchase priceNon-cash awardSep 2Filed Sep 4 · 2d laterSEC filing
EVP CHROCommon StockOption exercise or conversion2,393$32.69 / share$78.23KAug 14Filed Aug 18 · 4d laterSEC filing
EVP CHROCommon StockExercise-price or tax withholding643$32.69 / share$21.02KAug 14Filed Aug 18 · 4d laterSEC filing
EVP CHRORestricted Stock UnitOption exercise or conversionDerivative units2,393Exercise / conversion price not reportedNot a separate purchaseAug 14Filed Aug 18 · 4d laterSEC filing
DirectorDeferred Compensation Phantom StockGrant or awardDerivative units563$31.78 / derivative unit$17.89KJun 15Filed Jun 16 · 1d laterSEC filing
DirectorCommon StockGrant or award3,949Award · no purchase priceNon-cash awardMay 14Filed May 18 · 4d laterSEC filing
DirectorCommon StockGrant or award3,949Award · no purchase priceNon-cash awardMay 14Filed May 18 · 4d laterSEC filing
DirectorCommon StockGrant or award3,949Award · no purchase priceNon-cash awardMay 14Filed May 18 · 4d laterSEC filing
DirectorCommon StockGrant or award3,949Award · no purchase priceNon-cash awardMay 14Filed May 18 · 4d laterSEC filing
DirectorCommon StockGrant or award3,949Award · no purchase priceNon-cash awardMay 14Filed May 18 · 4d laterSEC filing
DirectorCommon StockGrant or award3,949Award · no purchase priceNon-cash awardMay 14Filed May 18 · 4d laterSEC filing
DirectorCommon StockGrant or award3,949Award · no purchase priceNon-cash awardMay 14Filed May 18 · 4d laterSEC filing
DirectorCommon StockGrant or award3,949Award · no purchase priceNon-cash awardMay 14Filed May 18 · 4d laterSEC filing
DirectorCommon StockGrant or award3,949Award · no purchase priceNon-cash awardMay 14Filed May 18 · 4d laterSEC filing
DirectorCommon StockGrant or award3,949Award · no purchase priceNon-cash awardMay 14Filed May 18 · 4d laterSEC filing
EVP, Chief Accounting OfficerCommon StockExercise-price or tax withholding396$29.10 / share$11.52KApr 15Filed Apr 16 · 1d laterSEC filing

Congress transactions 3

All Congress filings
Sale disclosed

Columbia Banking System, Inc. - Common Stock (COLB) · Stock

The filing reports a sale for a joint account.

Josh Gottheimer official portraitJosh GottheimerReporting House member
Reported amount
$1,001 – $15,000Reported range; exact amount not disclosed.
Trade date
March 5, 2026
Filed April 8, 2026 · 34d laterOriginal report
Sale disclosed

Columbia Banking System, Inc. - Common Stock (COLB) · Stock

The filing reports a sale for the member.

Gilbert Cisneros official portraitGilbert CisnerosReporting House member
Reported amount
$15,001 – $50,000Reported range; exact amount not disclosed.
Trade date
January 15, 2026
Filed February 13, 2026 · 29d laterOriginal report
Purchase disclosed

Columbia Banking System, Inc. - Common Stock (COLB) · Stock

The filing reports a purchase for the member.

Gilbert Cisneros official portraitGilbert CisnerosReporting House member
Reported amount
$1,001 – $15,000Reported range; exact amount not disclosed.
Trade date
October 3, 2025
Filed November 18, 2025 · 46d laterOriginal report
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Why this buying score?

Qualifying common-equity purchase value

$5,619 of common-equity purchase value after transaction-age decay across 180 days.

+2 pts

Distinct buying groups

1 distinct reporting-owner group(s). Joint rows count once; identity is not proof of discretion.

+2 pts

This score describes qualifying insider purchases at issuer level. Read the methodology

Sources and coverage

Limited filing history · Market-wide discovery does not establish complete company history. View coverage
Source
SEC EDGAR · Form 4
Issuer CIK
0000887343
Latest public acceptance
Sep 15, 2026, 08:55 PM UTC
Score calculated
Oct 8, 2026, 12:04 AM UTC
Parser
form4-parser-1.5
Classifier
form4-classifier-1.1
Scoring methodology
insider-experimental-1.1
Availability
Public filing time, not trade date

Open a transaction's SEC filing for the primary evidence. A code P may describe an open-market or private purchase; classification is not proof of intent.

Insider activity can have many explanations. Signal Strength is not a probability of profit or a recommendation to trade.