GGB · Insider Trading
Gerdau S.A.
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.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-25 | Claudio Johannpeter | — | Sell | −85,607 | −$422.90K |
| 2026-09-21 | Rafael Gamboa Lopes | — | Sell | −51,800 | −$263.66K |
| 2026-08-27 | Marcos Eduardo Faraco Wahrhaftig | — | A | — | — |
| 2026-08-14 | Marcos Zilles Mattiello | — | Sell | −10,387 | −$53.08K |
| 2026-08-12 | Andre Bier Gerdau Johannpeter | — | Sell | −99,200 | −$490.05K |
| 2026-08-10 | Rafael Dorneles Japur | — | Sell | −10,000 | −$51.00K |
| 2026-06-15 | Gustavo Werneck Da Cunha | CEO and Board Member | Buy | +165,224 | +$781.51K |
| 2026-06-03 | Chia Yuan Wang | — | Sell | −30,935 | −$138.90K |
| 2026-06-03 | Mauricio Metz | — | Sell | −7,000 | −$33.95K |
| 2026-05-28 | Mauricio Metz | — | Sell | −5,000 | −$23.50K |
| 2026-05-26 | Rafael Dorneles Japur | — | Sell | −5,000 | −$23.75K |
| 2026-05-22 | Cesar Obino da Rosa Peres | Officer | Sell | −8,000 | −$36.80K |
| 2026-05-15 | Mauricio Metz | — | Sell | −5,000 | −$24.25K |
| 2026-05-12 | Gustavo Werneck Da Cunha | CEO and Board Member | MIXED | −80 | −$2.11M |
| 2026-05-08 | Mauricio Metz | — | Sell | −2,000 | −$9.38K |
| 2026-05-07 | Chia Yuan Wang | — | Sell | −40,000 | −$190.00K |
| 2026-05-05 | Gustavo Werneck Da Cunha | CEO and Board Member | Sell | −88,000 | −$396.00K |
| 2026-05-04 | Chia Yuan Wang | — | Sell | −20,000 | −$90.80K |
| 2026-04-14 | Chia Yuan Wang | — | Sell | −25,000 | −$105.25K |
| 2026-04-14 | Mauricio Metz | — | Sell | −1,000 | −$4.24K |
| 2026-04-13 | Marcos Eduardo Faraco Wahrhaftig | — | Sell | −12,419 | −$50.42K |
| 2026-04-10 | Gustavo Werneck Da Cunha | CEO and Board Member | Sell | −100,000 | −$408.50K |
| 2026-04-10 | Chia Yuan Wang | — | Sell | −34,000 | −$136.00K |
| 2026-03-25 | Guilherme Chagas Gerdau Johannpeter | — | Sell | −85,607 | −$281.65K |
| 2026-03-24 | Guilherme Chagas Gerdau Johannpeter | — | Sell | −85,607 | −$281.65K |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Guilherme Chagas Gerdau Johannpeter | — | 702,952,615 | $3.22B |
| Andre Bier Gerdau Johannpeter | — | 248,662 | $1.14M |
| Gustavo Werneck Da Cunha | CEO and Board Member | 165,224 | $755.90K |
| Rafael Dorneles Japur | — | 86,967 | $397.87K |
| Rafael Gamboa Lopes | — | 83,399 | $381.55K |
| Mauricio Metz | — | 22,536 | $103.10K |
| Marcos Zilles Mattiello | — | 8,997 | $41.16K |
| Chia Yuan Wang | — | 882 | $4.04K |
| Claudio Johannpeter | — | 283 | $1.29K |
| Cesar Obino da Rosa Peres | Officer | 8 | $37 |
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.
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.