GGB insider trading — Gerdau S.A.
Over the last 90 days, insiders at Gerdau S.A. (GGB) made 0 open-market purchases worth $0 and 5 open-market sales worth $1.28M, making them net sellers by $1.28M. The largest sale was by Johannpeter Andre Bier Gerdau (-), who sold 99,200 shares for $490K on Aug 10, 2026.
Updated Oct 16, 2026.
Recent GGB insider transactions
Every Form 4 filed by Gerdau S.A. officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Sep 23, 2026 | Johannpeter Claudio | - | S · Sale | Direct | 85,607 | $4.94 | $423K | Form 4 |
| Sep 17, 2026 | Lopes Rafael Gamboa | - | S · Sale | Direct | 51,800 | $5.09 | $264K | Form 4 |
| Jun 8, 2026 | Mattiello Marcos Zilles | - | S · Sale | Direct | 10,387 | $5.11 | $53K | Form 4 |
| Aug 10, 2026 | Johannpeter Andre Bier Gerdau | - | S · Sale | Direct | 99,200 | $4.94 | $490K | Form 4 |
| Aug 6, 2026 | Japur Rafael Dorneles | - | S · Sale | Direct | 10,000 | $5.10 | $51K | Form 4 |
GGB insider trading FAQ
Are insiders buying GGB stock?
Not on the open market. In the last 90 days, Gerdau S.A. insiders made no open-market purchases, and 5 open-market sales totaling $1.28M. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading GGB?
Recent sellers: Japur Rafael Dorneles, Johannpeter Andre Bier Gerdau, Johannpeter Claudio, Lopes Rafael Gamboa, Mattiello Marcos Zilles.
Where does GGB insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.