$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.
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

None significant; the sale is company‑specific.

No broader regional effect.

Limited to investors tracking insider activity.

Counterpoint

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

Key entities

  • Lopes Rafael Gamboa

    Reporter of the Form 4 transaction.

  • GERDAU S.A.

    Issuer of the shares sold.

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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