Summary
Updated Aug 30, 2026
Marcos Zilles Mattiello files SEC Form 4 reports at GERDAU S.A. (GGB). 1 SEC Form 4 filing on record, dated 14 August 2026. Most recent open-market trade: sold $53K of GGB on 14 August 2026. Lifetime open-market sales: $53K.
Recent Transactions
1Every recent SEC Form 4 transaction Marcos Zilles Mattiello has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Marcos Zilles Mattiello files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Cunha Gustavo Werneck da - $3.69M of GGB open-market activity in the last 12 months
- Chia Yuan Wang - $661K of GGB open-market activity in the last 12 months
- Guilherme Chagas Gerdau Johannpeter - $563K of GGB open-market activity in the last 12 months
- Andre Bier Gerdau Johannpeter - $490K of GGB open-market activity in the last 12 months
- Mauricio Metz - $95K of GGB open-market activity in the last 12 months
- Rafael Dorneles Japur - $75K of GGB open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Marcos Zilles Mattiello?
Marcos Zilles Mattiello is a corporate insider of GERDAU S.A. (GGB). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Marcos Zilles Mattiello submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Marcos Zilles Mattiello been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($53K) across all tracked filings.
Where can I see all of Marcos Zilles Mattiello's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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