GGB (Gerdau S.A.)
Insider Trading Activity
Every open-market purchase and sale reported by GGB officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-21 | Rafael Gamboa Lopes | — | Sell | — | — |
| 2026-08-27 | Marcos Eduardo Faraco Wahrhaftig | — | A | — | — |
| 2026-08-14 | Marcos Zilles Mattiello | — | Sell | — | — |
| 2026-08-12 | Andre Bier Gerdau Johannpeter | — | Sell | — | — |
| 2026-08-10 | Rafael Dorneles Japur | — | Sell | — | — |
| 2026-06-15 | Gustavo Werneck Da Cunha | CEO and Board Member | Buy | — | — |
| 2026-06-03 | Chia Yuan Wang | — | Sell | — | — |
| 2026-06-03 | Mauricio Metz | — | Sell | — | — |
| 2026-05-28 | Mauricio Metz | — | Sell | — | — |
| 2026-05-26 | Rafael Dorneles Japur | — | Sell | — | — |
| 2026-05-22 | Cesar Obino da Rosa Peres | Officer | Sell | — | — |
| 2026-05-15 | Mauricio Metz | — | Sell | — | — |
| 2026-05-12 | Gustavo Werneck Da Cunha | CEO and Board Member | MIXED | — | — |
| 2026-05-08 | Mauricio Metz | — | Sell | — | — |
| 2026-05-07 | Chia Yuan Wang | — | Sell | — | — |
| 2026-05-05 | Gustavo Werneck Da Cunha | CEO and Board Member | Sell | — | — |
| 2026-05-04 | Chia Yuan Wang | — | Sell | — | — |
| 2026-04-14 | Chia Yuan Wang | — | Sell | — | — |
| 2026-04-14 | Mauricio Metz | — | Sell | — | — |
| 2026-04-13 | Marcos Eduardo Faraco Wahrhaftig | — | Sell | — | — |
| 2026-04-10 | Gustavo Werneck Da Cunha | CEO and Board Member | Sell | — | — |
| 2026-04-10 | Chia Yuan Wang | — | Sell | — | — |
| 2026-03-25 | Guilherme Chagas Gerdau Johannpeter | — | Sell | — | — |
| 2026-03-24 | Guilherme Chagas Gerdau Johannpeter | — | Sell | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | — | 702,952,615 | — |
| — | — | 248,662 | — |
| — | CEO and Board Member | 165,224 | — |
| — | — | 86,967 | — |
| — | — | 83,399 | — |
| — | — | 22,536 | — |
| — | — | 8,997 | — |
| — | — | 882 | — |
| — | Officer | 8 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the GGB quote page; the site-wide leaderboard is on the insider transactions hub.