Summary
Updated Aug 31, 2026
Guilherme Chagas Gerdau Johannpeter files SEC Form 4 reports at GERDAU S.A. (GGB). 2 SEC Form 4 filings on record, most recently on 25 March 2026. Most recent open-market trade: sold $282K of GGB on 25 March 2026. Lifetime open-market sales: $563K.
Recent Transactions
2Every recent SEC Form 4 transaction Guilherme Chagas Gerdau Johannpeter has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Guilherme Chagas Gerdau Johannpeter go back to 2026: 2 primary Form 4 filings, an average of 2.0 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Guilherme Chagas Gerdau Johannpeter 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
- 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
- Marcos Zilles Mattiello - $53K 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 Guilherme Chagas Gerdau Johannpeter?
Guilherme Chagas Gerdau Johannpeter is a corporate insider of GERDAU S.A. (GGB). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
When did Guilherme Chagas Gerdau Johannpeter last file a Form 4?
The most recent primary Form 4 on record is dated 25 March 2026, one of 2 filings going back to 2026.
Has Guilherme Chagas Gerdau Johannpeter been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($563K) across all tracked filings.
Where can I see all of Guilherme Chagas Gerdau Johannpeter'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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