GGB Gerdau S.A.
Gerdau S.A. (GGB) Insider Activity
What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.
How much of that selling was preplanned? 0% planned / 100% discretionary
Largest single sale: $2.1M.
Where they traded
Last open-market purchase: June 12, 2026 , by Da Cunha Gustavo Werneck .
Recent open-market activity
| Date | Insider | Role | Action | Shares | Price | Value | Held after |
|---|---|---|---|---|---|---|---|
| Johannpeter Andre Bier Gerdau | Other | Sell | 99,200 | $4.94 | $490.0K | 247,380 −28.6% of holding | |
| Japur Rafael Dorneles | Other | Sell | 10,000 | $5.10 | $51.0K | 86,967 −10.3% of holding | |
| Da Cunha Gustavo Werneck | CEO and Board Member | Buy | 165,224 | $4.73 | $781.5K | 165,224 | |
| Mattiello Marcos Zilles | Other | Sell | 10,387 | $5.11 | $53.1K | None left | |
| Wang Chia Yuan | Other | Sell | 30,935 | $4.49 | $138.9K | None left | |
| Metz Mauricio | Other | Sell | 7,000 | $4.85 | $34.0K | 22,536 −23.7% of holding | |
| Metz Mauricio | Other | Sell | 5,000 | $4.70 | $23.5K | 29,536 −14.5% of holding | |
| Japur Rafael Dorneles | Other | Sell | 5,000 | $4.75 | $23.8K | 96,967 −4.9% of holding | |
| Peres Cesar Obino da Rosa | Officer | Sell | 8,000 | $4.60 | $36.8K | 8 −99.9% of holding | |
| Metz Mauricio | Other | Sell | 5,000 | $4.85 | $24.3K | 34,536 −12.6% of holding | |
| Da Cunha Gustavo Werneck | CEO and Board Member | Sell | 432,854 | $4.87 | $2.1M | None left | |
| Wang Chia Yuan | Other | Sell | 40,000 | $4.75 | $190.0K | 32,195 −55.4% of holding | |
| Metz Mauricio | Other | Sell | 2,000 | $4.69 | $9.4K | 39,536 −4.8% of holding | |
| Wang Chia Yuan | Other | Sell | 20,000 | $4.54 | $90.8K | 72,195 −21.7% of holding | |
| Da Cunha Gustavo Werneck | CEO and Board Member | Sell | 88,000 | $4.50 | $396.0K | 80 −99.9% of holding | |
| Wang Chia Yuan | Other | Sell | 76,700 | $4.49 | $344.4K | 92,195 −45.4% of holding | |
| Uhlein Clemir | Other | Sell | 38,276 | $4.51 | $172.6K | None left | |
| Metz Mauricio | Other | Sell | 1,000 | $4.53 | $4.5K | 41,536 −2.4% of holding | |
| Wang Chia Yuan | Other | Sell | 25,000 | $4.21 | $105.3K | 168,895 −12.9% of holding | |
| Metz Mauricio | Other | Sell | 1,000 | $4.24 | $4.2K | 42,536 −2.3% of holding | |
| Da Cunha Gustavo Werneck | CEO and Board Member | Sell | 50,000 | $4.16 | $208.0K | 88,080 −36.2% of holding | |
| Wahrhaftig Marcos Eduardo Faraco | Other | Sell | 12,419 | $4.06 | $50.4K | None left | |
| Da Cunha Gustavo Werneck | CEO and Board Member | Sell | 50,000 | $4.01 | $200.5K | 138,080 −26.6% of holding | |
| Wang Chia Yuan | Other | Sell | 34,000 | $4.00 | $136.0K | 193,895 −14.9% of holding | |
| Johannpeter Guilherme Chagas Gerdau 2 fills | Other | Sell | 171,214 | $3.29 | $563.3K | None left |
Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.