Gerdau S.A. (GGB) Insider Trading
Over the last 3 months, GGB insiders made 1 open-market buy and 3 sales, a net purchase of $187K (SEC Form 4). Over the last 6 months, 149 institutions increased and 105 reduced their position (13F).
Insider Activity
Sentiment
62/100
Buys (3m)
1
Sells (3m)
3
Net (3m)
$187.4K
Insiders buying
Insider trades by month Buys Sells
Mar
Apr
May
Jun
Aug
Context3-month price +2%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 27, 2026 | Wahrhaftig Marcos Eduardo Faracoother: Executive Vice President | Grant | 107,749 | $3.75 |
| Aug 14, 2026 | Mattiello Marcos Zillesother: Senior Management | Sell | 10,387 | $5.11 |
| Aug 12, 2026 | Johannpeter Andre Bier Gerdauother: Chairman of Board of Directors | Sell | 99,200 | $4.94 |
| Aug 10, 2026 | Japur Rafael Dornelesother: VP, CFO and IR Officer | Sell | 10,000 | $5.10 |
| Jun 15, 2026 | Da Cunha Gustavo Werneckofficer: CEO and Board Member | Buy | 165,224 | $4.73 |
| May 28, 2026 | Metz Mauricioother: Executive Vice President | Sell | 5,000 | $4.70 |
| May 26, 2026 | Japur Rafael Dornelesother: VP, CFO and IR Officer | Sell | 5,000 | $4.75 |
| May 22, 2026 | Peres Cesar Obino da Rosaofficer: Officer | Sell | 8,000 | $4.60 |
| May 15, 2026 | Metz Mauricioother: Executive Vice President | Sell | 5,000 | $4.85 |
| May 12, 2026 | Da Cunha Gustavo Werneckofficer: CEO and Board Member | Sell | 432,854 | $4.87 |
| May 12, 2026 | Da Cunha Gustavo Werneckofficer: CEO and Board Member | Grant | 432,774 | — |
| May 8, 2026 | Metz Mauricioother: Executive Vice President | Sell | 2,000 | $4.69 |
| May 7, 2026 | Wang Chia Yuanother: Senior management | Sell | 40,000 | $4.75 |
| May 5, 2026 | Da Cunha Gustavo Werneckofficer: CEO and Board Member | Sell | 88,000 | $4.50 |
| May 4, 2026 | Wang Chia Yuanother: Senior management | Sell | 20,000 | $4.54 |
| Apr 30, 2026 | Metz Mauricioother: Executive Vice President | Sell | 1,000 | $4.53 |
| Apr 30, 2026 | Uhlein Clemirother: Senior Management | Sell | 38,276 | $4.51 |
| Apr 30, 2026 | Wang Chia Yuanother: Senior Management | Sell | 76,700 | $4.49 |
| Apr 14, 2026 | Wang Chia Yuanother: Senior Management | Sell | 25,000 | $4.21 |
| Apr 13, 2026 | Wahrhaftig Marcos Eduardo Faracoother: Executive Vice President | Sell | 12,419 | $4.06 |
| Apr 10, 2026 | Da Cunha Gustavo Werneckofficer: CEO and Board Member | Sell | 50,000 | $4.01 |
| Apr 10, 2026 | Wang Chia Yuanother: Senior management | Sell | 34,000 | $4.00 |
| Mar 24, 2026 | Johannpeter Guilherme Chagas Gerdauother: Vice-Chairman of Board | Sell | 85,607 | $3.29 |
Source: GGB SEC Form 4 filings, latest Aug 27, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their GGB positions over the last 6 months (SEC Form 13F).
Increased
149
New positions
81
Reduced
105
Sold out
27
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| ACADIAN ASSET MANAGEMENT LLC | Increased | 48.7M | Aug 13, 2026 |
| CAPITAL WORLD INVESTORS | New Position | 27.5M | May 13, 2026 |
| Capital World Investors | Reduced | 26.9M | Aug 12, 2026 |
| TWO SIGMA INVESTMENTS, LP | Increased | 25.8M | May 15, 2026 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Increased | 25.7M | Aug 13, 2026 |
| DONALD SMITH & CO., INC. | Reduced | 24.1M | May 14, 2026 |
| CONTRARIAN CAPITAL MANAGEMENT, L.L.C. | Unchanged | 19.1M | Aug 14, 2026 |
| CONTRARIAN CAPITAL MANAGEMENT, L.L.C. | Unchanged | 19.1M | May 15, 2026 |
| BlackRock, Inc. | Increased | 18.2M | Aug 7, 2026 |
| DONALD SMITH & CO., INC. | Reduced | 17.5M | Aug 11, 2026 |
| Aquamarine Financial (Cayman) Ltd | Reduced | 16.7M | May 15, 2026 |
| Aquamarine Financial (Cayman) Ltd | Unchanged | 16.7M | Aug 12, 2026 |
| TWO SIGMA INVESTMENTS, LP | Reduced | 15.4M | Aug 14, 2026 |
| MACKENZIE FINANCIAL CORP | Increased | 14.6M | Aug 13, 2026 |
| BANK OF AMERICA CORP /DE/ | Increased | 13.2M | May 18, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.