GGB insiders were on both sides of the trade this year. Buys came to roughly $782,000 (one buyer), sales to $6.1 million (12 sellers).
The largest purchase came from Da Cunha Gustavo Werneck (CEO), about $782,000. C-suite participation is part of the picture here.
Quarter by quarter: 3 quarters in a row of net selling by insiders. Insiders bought in 1 of the last 7 full quarters. Big money check: 212 institutions held GGB as of Q2 2026, and more funds bought than sold.
| Filed | Insider | Role | Type | Shares | Price | Value | Source |
|---|---|---|---|---|---|---|---|
| Sep 25, 2026 | Johannpeter Claudio | Other | Sell | 85,607 | $4.94 | $423K | SEC |
| Sep 21, 2026 | Lopes Rafael Gamboa | Other | Sell | 51,800 | $5.09 | $264K | SEC |
| Aug 14, 2026 | Mattiello Marcos Zilles | Other | Sell | 10,387 | $5.11 | $53K | SEC |
| Aug 12, 2026 | Johannpeter Andre Bier Gerdau | Other | Sell | 99,200 | $4.94 | $490K | SEC |
| Aug 10, 2026 | Japur Rafael Dorneles | Other | Sell | 10,000 | $5.10 | $51K | SEC |
| Jun 15, 2026 | Da Cunha Gustavo Werneck | CEO | Buy | 165,224 | $4.73 | $782K | SEC |
| Jun 3, 2026 | Wang Chia Yuan | Other | Sell | 30,935 | $4.49 | $139K | SEC |
| Jun 3, 2026 | Metz Mauricio | Other | Sell | 7,000 | $4.85 | $34K | SEC |
| May 28, 2026 | Metz Mauricio | Other | Sell | 5,000 | $4.70 | $24K | SEC |
| May 26, 2026 | Japur Rafael Dorneles | Other | Sell | 5,000 | $4.75 | $24K | SEC |
| May 22, 2026 | Peres Cesar Obino da Rosa | Officer | Sell | 8,000 | $4.60 | $37K | SEC |
| May 15, 2026 | Metz Mauricio | Other | Sell | 5,000 | $4.85 | $24K | SEC |
| May 12, 2026 | Da Cunha Gustavo Werneck | CEO | Sell | 432,854 | $4.87 | $2.1M | SEC |
| May 8, 2026 | Metz Mauricio | Other | Sell | 2,000 | $4.69 | $9K | SEC |
| May 7, 2026 | Wang Chia Yuan | Other | Sell | 40,000 | $4.75 | $190K | SEC |
In the last 12 months Gerdau S.A. insiders made open-market purchases worth about $782,000 and sales worth about $6.1 million. Data comes from SEC Form 4 filings, updated every 30 minutes on CapitalSnitch.
The most recent open-market insider trade in GGB was filed on 2026-09-25.
212 investment managers reported holding GGB in SEC Form 13F filings for Q2 2026.
No congressional trades in GGB were reported in the past two years. The full list is free on CapitalSnitch.
Public-record data for research and education, not investment advice. Insider sales are often pre-planned (10b5-1). Congress data: Data derived from public disclosures filed under the Ethics in Government Act and the STOCK Act, republished free for public transparency and news reporting. Disclosures may lag the trade by 45 days or more and show amounts only as ranges. This data may not be used for credit rating, loan underwriting, solicitation of money (political, charitable or other), direct-mail or commercial targeting (5 U.S.C. 13107).