$COLB

GARDNER STEVEN R sold $329K of COLB

GARDNER STEVEN R sold 10,522 shares of COLUMBIA BANKING SYSTEM, INC. (COLB) at an average of $31.23 ($31.22–$31.24, $0.33M total) across 7 trades on 2026-10-29.

Original reporting
SEC EDGAR · GARDNER STEVEN R
Published Oct 30, 2026, 10:48 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Oct 30, 2026, 10:52 PM UTC. Informational, not investment advice.
How this was made
AlphAI summarizes source reporting and applies a structured AI analysis for relevance, timing, sentiment and ticker impact. Always verify material claims with the original publisher.
AlphAI market briefInsider activity
Primary signal
$COLB
Bearish
medium confidence
Mentioned
$COLB
Relevance
4/10
AlphAI data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$COLBBearishLow
01

Why it matters

The disclosed sale provides fresh data on insider sentiment for Columbia Banking System.

02

Market read

New insider sale information may influence short-term trading decisions.

03

What to watch

No 10b5-1 plan; the director may be diversifying holdings.

Relevance 4/10Novelty 4/10Timing: post-market

Background

SEC Form 4 filing discloses insider transactions for public companies.

Company-level read

Ticker impact

$COLBBearishMedium confidence
Context

Director Steven Gardner sold 10,522 shares of Columbia Banking System for $328,616.50 on 2026-10-29.

Expected impact

likely slight pressure as the market prices in the director's sell.

Evidence & confidence

A director sold a modest $329K stake; such sales typically signal limited concern but can prompt short-term selling.

Market effects

Minimal impact on regional banking sector.

Limited to Columbia Banking System's share price.

None

Counterpoint

The sale could be routine portfolio rebalancing, not a bearish signal.

Key entities

  • Columbia Banking System, Inc.

    Issuer of the Form 4 filing.

  • Steven Gardner

    Director of Columbia Banking System who sold shares.

Full insider trading history

This story covers one filing. See everything behind it: every insider buy and sell on record, 10b5-1 plans, late filings, and which officers and directors are trading.

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Columbia Banking System (COLB) reported Q3 2026 earnings with EPS of $0.78 GAAP and $0.82 operating. Pre-provision net revenue rose 7% sequentially and 25% year-over-year. Net interest margin was 4.11%, with Q4 guidance at ~4.05%. Non-interest income reached $87 million, and non-interest expense was flat at $365 million. The company repurchased 6.5 million shares for ~$200 million and authorized a new $1.2 billion buyback program.

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$COLBHighAI 8/10

Columbia Banking (COLB) Q3 2026 Earnings Call Transcript

Columbia Banking (COLB) reported Q3 2026 EPS of $0.78, with operating EPS at $0.82. Net interest margin expanded to 4.11%, and noninterest income was $87M. The company reduced wholesale funding by $1.5B, improving funding mix. They repurchased $200M in shares and expect Q4 NIM around 4.05%.