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About GERDAU S.A. (GGB)
The SEC lists GERDAU S.A. under CIK 0001073404, in steel works, blast furnaces and rolling and finishing mills. We track it alongside the rest of the Materials sector.
GGB Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 5 | 256,994 | $1.28M |
| Grant or award | 1 | 107,749 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
GGB insider transactions (Form 4)
2725 Form 4 filings on record, the earliest from Mar 24, 2026, newest first.
| Traded | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Claudio Johannpeter | Open-market sale | Preferred shares | 85,607 | $4.94 footnote F1 | $423K | |
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| Rafael Gamboa Lopes | Open-market sale | Preferred shares | 51,800 | $5.09 footnote F1 | $264K | |
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 Marcos Eduardo Faraco Wahrhaftig | Grant or award | Restricted Stock Units | 107,749 | $3.75 | $404K | |
| Marcos Zilles Mattiello | Open-market sale | Preferred shares | 10,387 | $5.11 | $53K | |
| Andre Bier Gerdau Johannpeter | Open-market sale | Preferred shares | 99,200 | $4.94 footnote F1 | $490K | |
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| Rafael Dorneles Japur | Open-market sale | Preferred shares | 10,000 | $5.10 footnote F1 | $51K | |
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 Cunha Gustavo Werneck da - Officer | Open-market purchase | Preferred shares | 165,224 | $4.73 footnote F1 | $782K | |
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 Chia Yuan Wang | Open-market sale | Preferred shares | 30,935 | $4.49 footnote F2 | $139K | |
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 Mauricio Metz | Open-market sale | Preferred shares | 7,000 | $4.85 footnote F1 | $34K | |
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| Mauricio Metz | Open-market sale | Preferred shares | 5,000 | $4.70 footnote F1 | $24K | |
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| Rafael Dorneles Japur | Open-market sale | Preferred shares | 5,000 | $4.75 footnote F1 | $24K | |
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| Cesar Obino da Rosa Peres - Officer | Open-market sale | Preferred shares | 8,000 | $4.60 footnote F1 | $37K | |
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| Mauricio Metz | Open-market sale | Preferred shares | 5,000 | $4.85 footnote F1 | $24K | |
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| Cunha Gustavo Werneck da - Officer | Grant or award | Preferred shares | 432,774 | $0.00 | - | |
| Cunha Gustavo Werneck da - Officer | Open-market sale | Preferred shares | 432,854 | $4.87 footnote F2,F3 | $2.11M | |
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| Mauricio Metz | Open-market sale | Preferred shares | 2,000 | $4.69 footnote F1 | $9K | |
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| Chia Yuan Wang | Open-market sale | Preferred shares | 40,000 | $4.75 footnote F2 | $190K | |
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| Cunha Gustavo Werneck da - Officer | Open-market sale | Preferred shares | 88,000 | $4.50 footnote F1 | $396K | |
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| Chia Yuan Wang | Open-market sale | Preferred shares | 20,000 | $4.54 footnote F2 | $91K | |
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| Mauricio Metz | Open-market sale | Preferred shares | 1,000 | $4.24 footnote F1 | $4K | |
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| Chia Yuan Wang | Open-market sale | Preferred shares | 25,000 | $4.21 footnote F2 | $105K | |
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| Marcos Eduardo Faraco Wahrhaftig | Open-market sale | Preferred shares | 12,419 | $4.06 footnote F1,F2 | $50K | |
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| Cunha Gustavo Werneck da - Officer | Open-market sale | Preferred shares | 50,000 | $4.01 footnote F1 | $201K | |
| Cunha Gustavo Werneck da - Officer | Open-market sale | Preferred shares | 50,000 | $4.16 footnote F2 | $208K | |
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| Chia Yuan Wang | Open-market sale | Preferred shares | 34,000 | $4.00 footnote F2 | $136K | |
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 Guilherme Chagas Gerdau Johannpeter | Open-market sale | Preferred shares | 85,607 | $3.29 | $282K | |
| Guilherme Chagas Gerdau Johannpeter | Open-market sale | Preferred shares | 85,607 | $3.29 footnote F1 | $282K | |
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GGB insider trading FAQ
What is the latest insider trade for GGB?
GERDAU S.A. (GGB) had 6 insider filings in the last 90 days, with the most recent on 25 September 2026. The full record for GGB runs to 25 Form 4 filings, the earliest from 24 March 2026. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying GGB stock?
No insider purchases of GGB were filed in the last 90 days. 1 purchase is on record for this company.
How many insiders are selling GGB stock?
5 insider sales of GGB were filed in the last 90 days, totaling $1.28M.
Where can I see GGB SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects GGB Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Materials companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Claudio Johannpeter view on EDGAR
- - Rafael Gamboa Lopes view on EDGAR
- - Marcos Eduardo Faraco Wahrhaftig view on EDGAR
- - Marcos Zilles Mattiello view on EDGAR
- - Andre Bier Gerdau Johannpeter view on EDGAR
- - Rafael Dorneles Japur view on EDGAR
- - Cunha Gustavo Werneck da view on EDGAR
- - Chia Yuan Wang view on EDGAR
- - Mauricio Metz view on EDGAR
Related companies with recent insider activity
Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Insider activity in Materials
- Where GGB's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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