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SEC EDGARSEP 211 min read$GGB

Lopes Rafael Gamboa sold $264K of GGB

Lopes Rafael Gamboa sold 51,800 shares of GERDAU S.A. (GGB) at $5.09 ($0.26M total) on 2026-09-17.

Original reporting
SEC EDGAR · Lopes Rafael Gamboa
Published Sep 21, 2026, 8:30 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Sep 21, 2026, 10:45 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.
About AlphAI AI DeskScoring methodologyReport an issue
AlphAI market briefInsider activity
Primary signal
$GGB
Bearish
medium confidence
Mentioned
$GGB
Relevance
4/10
AlphAI data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$GGBBearishLow
01

Why it matters

The insider sale is a standard disclosure with modest size; traders may monitor for further insider activity.

02

Market read

Provides a fresh primary source of insider selling; limited trading relevance.

03

What to watch

Potential upcoming corporate actions or personal liquidity needs not disclosed.

Relevance 4/10Novelty 4/10Timing: Filed Sep 21, reflecting a recent Sep 17 sale.

Background

GERDAU S.A. (ticker GGB) is a major steel producer listed on the NYSE.

Company-level read

Ticker impact

$GGBBearishMedium confidence
Context

Insider Lopes Rafael Gamboa sold 51,800 shares of GERDAU S.A. for $263,662 on Sep 17, 2026.

Expected impact

Minor downward pressure on GGB price in the short term.

Evidence & confidence

Form 4 filings are primary sources; the transaction size is modest relative to market cap, so impact is limited.

Market effects

Sector

None significant; the sale is company‑specific.

Regional

No broader regional effect.

Global

Limited to investors tracking insider activity.

Counterpoint

What could challenge this read

The sale may be routine portfolio rebalancing, not a negative signal.

Key entities

  • Insider
    Lopes Rafael Gamboa

    Reporter of the Form 4 transaction.

  • Company
    GERDAU S.A.

    Issuer of the shares sold.

Read at source← All news

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.

GGB insider trading history →

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