Gerdau S.A.
GGB- Exchange
- NYSE
- Industry
- Steel Works, Blast Furnaces & Rolling & Finishing Mills
- SEC CIK
- 0001073404
In the last 90 days, Gerdau S.A. insiders filed 0 open-market purchases and 5 sales; 213 institutions reported holding it in 13F filings for Q2 2026, worth $1.46B in total; no superinvestor holds it.
Open-market trades, last 90 days
Open-market purchases (P) and sales (S) by Gerdau S.A. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.
- Open-market buys
- 0 filings
- Open-market sells
- 5 filings
- 5 insiders, $1.28M in total
- Insiders trading
- 5
- Net value
- −$1.28M
- Purchases minus sales
Insider roster
Directors, officers and 10% owners who have filed a Form 4 for Gerdau S.A., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Johannpeter Claudio | Other: Vice-Chairman of Board | 0 | Sep 25, 2026 | 1 |
| Lopes Rafael Gamboa | Other: Executive Vice President | 83,399 | Sep 21, 2026 | 1 |
| Wahrhaftig Marcos Eduardo Faraco | Other: Executive Vice President | 0 | Aug 27, 2026 | 2 |
| Mattiello Marcos Zilles | Other: Senior Management | 0 | Aug 14, 2026 | 1 |
| Johannpeter Andre Bier Gerdau | Other: Chairman of Board of Directors | 247,380 | Aug 12, 2026 | 1 |
| Japur Rafael Dorneles | Other: VP, CFO and IR Officer | 86,967 | Aug 10, 2026 | 2 |
| Da Cunha Gustavo Werneck | CEO and Board Member | 165,224 | Jun 15, 2026 | 4 |
| Wang Chia Yuan | Other: Senior Management | 0 | Jun 3, 2026 | 6 |
| Metz Mauricio | Other: Executive Vice President | 22,536 | Jun 3, 2026 | 6 |
| Peres Cesar Obino da Rosa | Officer | 8 | May 22, 2026 | 1 |
| Uhlein Clemir | Other: Senior Management | 0 | Apr 30, 2026 | 1 |
| Johannpeter Guilherme Chagas Gerdau | Other: Vice-Chairman of Board | 0 | Mar 25, 2026 | 1 |
Insider trades
Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Mar 25, 2026 (view filing) | Mar 20 | 5 days | Johannpeter Guilherme Chagas GerdauOther: Vice-Chairman of Board | SSalePreferred shares | −85.6K | $3.29 | −$281.6K | −100.0%0 after | Amended |
| Apr 10, 2026 (view filing) | Apr 8 | 2 days | Wang Chia YuanOther: Senior management | SSalePreferred shares | −34.0K | $4.00 | −$136.0K | −14.9%193.9K after | |
| Apr 10, 2026 (view filing) | Apr 8-9 | 2 days | Da Cunha Gustavo WerneckCEO and Board Member | SSalePreferred shares | −100.0K | $4.09 | −$408.5K | −53.2%88.1K after | 2 lots |
| Apr 13, 2026 (view filing) | Apr 9 | 4 days | Wahrhaftig Marcos Eduardo FaracoOther: Executive Vice President | SSalePreferred shares | −12.4K | $4.06 | −$50.4K | −100.0%0 after | |
| Apr 14, 2026 (view filing) | Apr 10 | 4 days | Wang Chia YuanOther: Senior Management | SSalePreferred shares | −25.0K | $4.21 | −$105.3K | −12.9%168.9K after | |
| Apr 14, 2026 (view filing) | Apr 10 | 4 days | Metz MauricioOther: Executive Vice President | SSalePreferred shares | −1.00K | $4.24 | −$4.24K | −2.3%42.5K after | |
| Apr 30, 2026 (view filing) | Apr 28 | 2 days | Uhlein ClemirOther: Senior Management | SSalePreferred shares | −38.3K | $4.51 | −$172.6K | −100.0%0 after | |
| Apr 30, 2026 (view filing) | Apr 28 | 2 days | Wang Chia YuanOther: Senior Management | SSalePreferred shares | −76.7K | $4.49 | −$344.4K | −45.4%92.2K after | |
| Apr 30, 2026 (view filing) | Apr 28 | 2 days | Metz MauricioOther: Executive Vice President | SSalePreferred shares | −1.00K | $4.53 | −$4.53K | −2.4%41.5K after | |
| May 4, 2026 (view filing) | Apr 30 | 4 days | Wang Chia YuanOther: Senior management | SSalePreferred shares | −20.0K | $4.54 | −$90.8K | −21.7%72.2K after | |
| May 5, 2026 (view filing) | Apr 28 | 7 daysLate | Da Cunha Gustavo WerneckCEO and Board Member | SSalePreferred shares | −88.0K | $4.50 | −$396.0K | −99.9%80 after | |
| May 7, 2026 (view filing) | May 5 | 2 days | Wang Chia YuanOther: Senior management | SSalePreferred shares | −40.0K | $4.75 | −$190.0K | −55.4%32.2K after | |
| May 8, 2026 (view filing) | May 5 | 3 daysLate | Metz MauricioOther: Executive Vice President | SSalePreferred shares | −2.00K | $4.69 | −$9.38K | −4.8%39.5K after | |
| May 12, 2026 (view filing) | May 8 | 4 days | Da Cunha Gustavo WerneckCEO and Board Member | SSalePreferred shares | −432.9K | $4.87 | −$2.11M | −100.0%0 after | |
| May 15, 2026 (view filing) | May 13 | 2 days | Metz MauricioOther: Executive Vice President | SSalePreferred shares | −5.00K | $4.85 | −$24.3K | −12.6%34.5K after | |
| May 22, 2026 (view filing) | May 19 | 3 daysLate | Peres Cesar Obino da RosaOfficer | SSalePreferred shares | −8.00K | $4.60 | −$36.8K | −99.9%8 after | |
| May 26, 2026 (view filing) | May 22 | 4 days | Japur Rafael DornelesOther: VP, CFO and IR Officer | SSalePreferred shares | −5.00K | $4.75 | −$23.8K | −4.9%97.0K after | |
| May 28, 2026 (view filing) | May 26 | 2 days | Metz MauricioOther: Executive Vice President | SSalePreferred shares | −5.00K | $4.70 | −$23.5K | −14.5%29.5K after | |
| Jun 3, 2026 (view filing) | Jun 2 | 1 day | Wang Chia YuanOther: Senior Management | SSalePreferred shares | −30.9K | $4.49 | −$138.9K | −100.0%0 after | |
| Jun 3, 2026 (view filing) | Jun 2 | 1 day | Metz MauricioOther: Executive Vice President | SSalePreferred shares | −7.00K | $4.85 | −$34.0K | −23.7%22.5K after | |
| Jun 15, 2026 (view filing) | Jun 12 | 3 days | Da Cunha Gustavo WerneckCEO and Board Member | PPurchasePreferred shares | +165.2K | $4.73 | +$781.5K | New position165.2K after | |
| Aug 10, 2026 (view filing)4:16 PM ET | Aug 6 | 4 days | Japur Rafael DornelesOther: VP, CFO and IR Officer | SSalePreferred shares | −10.0K | $5.10 | −$51.0K | −10.3%87.0K after | |
| Aug 12, 2026 (view filing)4:46 PM ET | Aug 10 | 2 days | Johannpeter Andre Bier GerdauOther: Chairman of Board of Directors | SSalePreferred shares | −99.2K | $4.94 | −$490.0K | −28.6%247.4K after | |
| Aug 14, 2026 (view filing)8:55 AM ET | Jun 8 | 67 daysLate | Mattiello Marcos ZillesOther: Senior Management | SSalePreferred shares | −10.4K | $5.11 | −$53.1K | −100.0%0 after | |
| Sep 21, 2026 (view filing)4:30 PM ET | Sep 17 | 4 days | Lopes Rafael GamboaOther: Executive Vice President | SSalePreferred shares | −51.8K | $5.09 | −$263.7K | −38.3%83.4K after | |
| Sep 25, 2026 (view filing)4:32 PM ET | Sep 23 | 2 days | Johannpeter ClaudioOther: Vice-Chairman of Board | SSalePreferred shares | −85.6K | $4.94 | −$422.9K | −100.0%0 after |