GGB insider buying and SEC filings, explained
Gerdau S.A. · CIK 1073404
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$0
Insiders who bought
0
Sold (not marked 10b5-1)
$5.9M
Planned sales (10b5-1)
$0
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Sep 23, 2026 | Sale | Claudio Johannpeter (Vice-Chairman of Board) sold 85,607 shares at $4.94 ($423K). Holdings down 100% to 0 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 25, 2026 |
| Sep 17, 2026 | Sale | Rafael Gamboa Lopes (Executive Vice President) sold 51,800 shares at $5.09 ($264K). Holdings down 38% to 83,399 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 21, 2026 |
| Jun 8, 2026 | Sale | Marcos Zilles Mattiello (Senior Management) sold 10,387 shares at $5.11 ($53K). Holdings down 100% to 0 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 14, 2026 |
| Aug 10, 2026 | Sale | Andre Bier Gerdau Johannpeter (Chairman of Board of Directors) sold 99,200 shares at $4.94 ($490K). Holdings down 29% to 247,380 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 12, 2026 |
| Aug 6, 2026 | Sale | Rafael Dorneles Japur (VP, CFO and IR Officer) sold 10,000 shares at $5.10 ($51K). Holdings down 10% to 86,967 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 10, 2026 |
| Jun 12, 2026 | Other purchase | Cunha Gustavo Werneck Da (CEO) bought 165,224 Preferred shares at $4.73 ($782K), reported as a purchase (code P). New position of 165,224 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 15, 2026 |
| Jun 2, 2026 | Sale | Mauricio Metz (Executive Vice President) sold 7,000 shares at $4.85 ($34K). Holdings down 24% to 22,536 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 3, 2026 |
| Jun 2, 2026 | Sale | Chia Yuan Wang (Senior Management) sold 30,935 shares at about $4.49 ($139K). Holdings down 100% to 0 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 3, 2026 |
| May 26, 2026 | Sale | Mauricio Metz (Executive Vice President) sold 5,000 shares at $4.70 ($24K). Holdings down 14% to 29,536 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 28, 2026 |
| May 22, 2026 | Sale | Rafael Dorneles Japur (VP, CFO and IR Officer) sold 5,000 shares at $4.75 ($24K). Holdings down 5% to 96,967 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 26, 2026 |
| May 19, 2026 | Sale | Cesar Obino da Rosa Peres (Officer) sold 8,000 shares at $4.60 ($37K). Holdings down 100% to 8 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 22, 2026 |
| May 13, 2026 | Sale | Mauricio Metz (Executive Vice President) sold 5,000 shares at $4.85 ($24K). Holdings down 13% to 34,536 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 15, 2026 |
| May 8, 2026 | Sale | Cunha Gustavo Werneck Da (CEO) sold 432,854 shares at about $4.87 ($2.1M). Holdings down 100% to 0 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 12, 2026 |
| May 5, 2026 | Sale | Mauricio Metz (Executive Vice President) sold 2,000 shares at $4.69 ($9K). Holdings down 5% to 39,536 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 8, 2026 |
| May 5, 2026 | Sale | Chia Yuan Wang (Senior management) sold 40,000 shares at about $4.75 ($190K). Holdings down 55% to 32,195 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 7, 2026 |
| Apr 28, 2026 | Sale | Cunha Gustavo Werneck Da (CEO) sold 88,000 shares at $4.50 ($396K). Holdings down 100% to 80 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 5, 2026 |
| Apr 30, 2026 | Sale | Chia Yuan Wang (Senior management) sold 20,000 shares at about $4.54 ($91K). Holdings down 22% to 72,195 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 4, 2026 |
| Apr 28, 2026 | Sale | Mauricio Metz (Executive Vice President) sold 1,000 shares at $4.53 ($5K). Holdings down 2% to 41,536 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 30, 2026 |
| Apr 28, 2026 | Sale | Chia Yuan Wang (Senior Management) sold 76,700 shares at about $4.49 ($344K). Holdings down 45% to 92,195 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 30, 2026 |
| Apr 28, 2026 | Sale | Clemir Uhlein (Senior Management) sold 38,276 shares at $4.51 ($173K). Holdings down 100% to 0 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 30, 2026 |
| Apr 10, 2026 | Sale | Mauricio Metz (Executive Vice President) sold 1,000 shares at $4.24 ($4K). Holdings down 2% to 42,536 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 14, 2026 |
| Apr 10, 2026 | Sale | Chia Yuan Wang (Senior Management) sold 25,000 shares at about $4.21 ($105K). Holdings down 13% to 168,895 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 14, 2026 |
| Apr 9, 2026 | Sale | Marcos Eduardo Faraco Wahrhaftig (Executive Vice President) sold 12,419 shares at about $4.06 ($50K). Holdings down 100% to 0 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 13, 2026 |
| Apr 8–9, 2026 | Sale | Cunha Gustavo Werneck Da (CEO) sold 100,000 shares between Apr 8 and Apr 9 at about $4.09 ($409K). Holdings down 53% to 88,080 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 10, 2026 |
| Apr 8, 2026 | Sale | Chia Yuan Wang (Senior management) sold 34,000 shares at about $4.00 ($136K). Holdings down 15% to 193,895 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 10, 2026 |
| Mar 20, 2026 | Sale Amended filing | Guilherme Chagas Gerdau Johannpeter (Vice-Chairman of Board) sold 85,607 shares at $3.29 ($282K). Holdings down 100% to 0 shares. Not marked as a 10b5-1 plan trade. This amends a filing from Mar 24. | SEC filing Filed Mar 25, 2026 |
2 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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