Form4.ai tracks every SEC insider trade in real time. See every GGB insider filing with a free account — no card.
See every GGB insider filing — free account, no card.
Free accountGERDAU S.A. (GGB) has 6 SEC Form 4 insider filings on record in the last 90 days. No insider purchases were filed — 5 sales totalling $1.3M. Most recent filing: Sept. 25, 2026.
Open-market value, last 90 days
Form 4 filings by type, last 90 days
| Date | Insider | Trade | Value | Price since buy |
|---|---|---|---|---|
| Sep 25, 2026 SEC filing | Johannpeter Claudio Insider | Sold | $422,899 | — |
| Sep 21, 2026 SEC filing | Lopes Rafael Gamboa Insider | Sold | $263,662 | — |
| Aug 14, 2026 SEC filing | Mattiello Marcos Zilles Insider | Sold | $53,078 | — |
Create a free account to see all 6 GGB filings from the last 90 days. No card needed.
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Form 4 is the filing company officers, directors and 10% shareholders must submit to the SEC within two business days of trading their own company's stock. Open-market purchases generally carry more signal than sales, which are often scheduled in advance. More on how this works.