GERDAU S.A. (GGB) Insider Trading -- Recent Executive & Director Transactions
12 insiders reported 28 Form 4 transactions for GERDAU S.A. (GGB) over the past 18 months (most recent 2026-09-25). Recent activity: Johannpeter Claudio (Insider) Sell 85,607 shares, Lopes Rafael Gamboa (Insider) Sell 51,800 shares, Mattiello Marcos Zilles (Insider) Sell 10,387 shares, Johannpeter Andre Bier Gerdau (Insider) Sell 99,200 shares, Japur Rafael Dorneles (Insider) Sell 10,000 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-25 | Johannpeter Claudio | Insider | Sell | 85,607 | $422,899 |
| 2026-09-21 | Lopes Rafael Gamboa | Insider | Sell | 51,800 | $263,662 |
| 2026-08-14 | Mattiello Marcos Zilles | Insider | Sell | 10,387 | $53,078 |
| 2026-08-12 | Johannpeter Andre Bier Gerdau | Insider | Sell | 99,200 | $490,048 |
| 2026-08-10 | Japur Rafael Dorneles | Insider | Sell | 10,000 | $51,000 |
| 2026-06-15 | Da Cunha Gustavo Werneck | CEO and Board Member | Buy | 165,224 | $781,510 |
| 2026-06-03 | Metz Mauricio | Insider | Sell | 7,000 | $33,950 |
| 2026-06-03 | Wang Chia Yuan | Insider | Sell | 30,935 | $138,898 |
| 2026-05-28 | Metz Mauricio | Insider | Sell | 5,000 | $23,500 |
| 2026-05-26 | Japur Rafael Dorneles | Insider | Sell | 5,000 | $23,750 |
| 2026-05-22 | Peres Cesar Obino da Rosa | Officer | Sell | 8,000 | $36,800 |
| 2026-05-15 | Metz Mauricio | Insider | Sell | 5,000 | $24,250 |
| 2026-05-12 | Da Cunha Gustavo Werneck | CEO and Board Member | Buy | 432,774 | $0 |
| 2026-05-12 | Da Cunha Gustavo Werneck | CEO and Board Member | Sell | 432,854 | $2.1M |
| 2026-05-08 | Metz Mauricio | Insider | Sell | 2,000 | $9,380 |
| 2026-05-07 | Wang Chia Yuan | Insider | Sell | 40,000 | $190,000 |
| 2026-05-05 | Da Cunha Gustavo Werneck | CEO and Board Member | Sell | 88,000 | $396,000 |
| 2026-05-04 | Wang Chia Yuan | Insider | Sell | 20,000 | $90,800 |
| 2026-04-30 | Metz Mauricio | Insider | Sell | 1,000 | $4,530 |
| 2026-04-30 | Wang Chia Yuan | Insider | Sell | 76,700 | $344,383 |
| 2026-04-30 | Uhlein Clemir | Insider | Sell | 38,276 | $172,625 |
| 2026-04-14 | Wang Chia Yuan | Insider | Sell | 25,000 | $105,250 |
| 2026-04-13 | Wahrhaftig Marcos Eduardo Faraco | Insider | Sell | 12,419 | $50,421 |
| 2026-04-10 | Da Cunha Gustavo Werneck | CEO and Board Member | Sell | 50,000 | $200,500 |
| 2026-04-10 | Da Cunha Gustavo Werneck | CEO and Board Member | Sell | 50,000 | $208,000 |
Source: SEC Form 4 filings · as of 2026-09-25