Gerdau's three largest insider shareholders as of September 29, 2026 are Andre Bier Gerdau Johannpeter (Other, 247.38K shares), Cunha Gustavo Werneck Da (Ceo And Board Member, 165.22K shares), Rafael Dorneles Japur (Other, 86.97K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Andre Bier Gerdau Johannpeter | Other | 247,380 | 0 | 247,380 | 40.9% | 12 Aug, 2026 |
| 2 | Cunha Gustavo Werneck Da | Ceo And Board Member | 165,224 | 0 | 165,224 | 27.3% | 15 Jun, 2026 |
| 3 | Rafael Dorneles Japur | Other | 86,967 | 0 | 86,967 | 14.4% | 10 Aug, 2026 |
| 4 | Rafael Gamboa Lopes | Other | 83,399 | 0 | 83,399 | 13.8% | 21 Sep, 2026 |
| 5 | Mauricio Metz | Other | 22,536 | 0 | 22,536 | 3.7% | 03 Jun, 2026 |
| 6 | Cesar Obino Da Rosa Peres | Officer | 8 | 0 | 8 | 0.0% | 22 May, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 23 Sep, 2026 | Claudio Johannpeter | Other | Disposed S | 85,607 | $4.94 | $422.90K | 0 | Direct |
| 17 Sep, 2026 | Rafael Gamboa Lopes | Other | Disposed S | 51,800 | $5.09 | $263.66K | 83,399 | Direct |
| 15 Jul, 2026 | Marcos Eduardo Faraco Wahrhaftig | Other | Acquired A | 107,749 | $3.75 | $404.06K | 107,749 | Direct |
| 08 Jun, 2026 | Marcos Zilles Mattiello | Other | Disposed S | 10,387 | $5.11 | $53.08K | 0 | Direct |
| 10 Aug, 2026 | Andre Bier Gerdau Johannpeter | Other | Disposed S | 99,200 | $4.94 | $490.05K | 247,380 | Direct |
| 06 Aug, 2026 | Rafael Dorneles Japur | Other | Disposed S | 10,000 | $5.10 | $51.00K | 86,967 | Direct |
| 12 Jun, 2026 | Cunha Gustavo Werneck Da | Ceo And Board Member | Acquired P | 165,224 | $4.73 | $781.51K | 165,224 | Direct |
| 02 Jun, 2026 | Chia Yuan Wang | Other | Disposed S | 30,935 | $4.49 | $138.90K | 0 | Direct |
| 02 Jun, 2026 | Mauricio Metz | Other | Disposed S | 7,000 | $4.85 | $33.95K | 22,536 | Direct |
| 26 May, 2026 | Mauricio Metz | Other | Disposed S | 5,000 | $4.70 | $23.50K | 29,536 | Direct |
| 22 May, 2026 | Rafael Dorneles Japur | Other | Disposed S | 5,000 | $4.75 | $23.75K | 96,967 | Direct |
| 19 May, 2026 | Cesar Obino Da Rosa Peres | Officer | Disposed S | 8,000 | $4.60 | $36.80K | 8 | Direct |
| 13 May, 2026 | Mauricio Metz | Other | Disposed S | 5,000 | $4.85 | $24.25K | 34,536 | Direct |
| 08 May, 2026 | Cunha Gustavo Werneck Da | Ceo And Board Member | Acquired A | 432,774 | $0.00 | $0 | 432,854 | Direct |
| 08 May, 2026 | Cunha Gustavo Werneck Da | Ceo And Board Member | Disposed S | 432,854 | $4.87 | $2.11Mn | 0 | Direct |
| 05 May, 2026 | Mauricio Metz | Other | Disposed S | 2,000 | $4.69 | $9.38K | 39,536 | Direct |
| 05 May, 2026 | Chia Yuan Wang | Other | Disposed S | 40,000 | $4.75 | $190.00K | 32,195 | Direct |
| 28 Apr, 2026 | Cunha Gustavo Werneck Da | Ceo And Board Member | Disposed S | 88,000 | $4.50 | $396.00K | 80 | Direct |
| 30 Apr, 2026 | Chia Yuan Wang | Other | Disposed S | 20,000 | $4.54 | $90.80K | 72,195 | Direct |
| 28 Apr, 2026 | Chia Yuan Wang | Other | Disposed S | 76,700 | $4.49 | $344.38K | 92,195 | Direct |