GGB · Insider trading · 13F holders · Congress trades
Gerdau S.A. (GGB)
Who is buying and selling GGB: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 9
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $1.3M
- Congress trades, 12 months
- 0
GGB at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 5 GGB insiders filed 5 sales worth $1.3M on SEC Form 4, and no open-market purchases.
- 9 13F filers hold GGB among their 50 largest positions, worth $319.5M combined. The biggest bets by portfolio weight are Contrarian Capital Management, L.l.c. (25.2%), Aquamarine Financial (Cayman) Ltd (3.7%) and Ninety One North America, Inc. (1.8%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
- No member of Congress has disclosed a trade in GGB.
- GGB last closed at $4.74 on Oct 29, 2026.
GGB insider trading
Between Aug 1, 2026 and Oct 29, 2026, 5 GGB insiders filed 5 sales worth $1.3M on SEC Form 4, and no open-market purchases.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Sep 25, 2026 | Johannpeter Claudio | Vice-Chairman of Board | Sale | 85,607 | $4.94 | $423K | SEC |
| Sep 21, 2026 | Lopes Rafael Gamboa | Executive Vice President | Sale | 51,800 | $5.09 | $264K | SEC |
| Aug 14, 2026 | Mattiello Marcos Zilles | Senior Management | Sale | 10,387.111 | $5.11 | $53K | SEC |
| Aug 12, 2026 | Johannpeter Andre Bier Gerdau | Chairman of Board of Directors | Sale | 99,200 | $4.94 | $490K | SEC |
| Aug 10, 2026 | Japur Rafael Dorneles | VP, CFO and IR Officer | Sale | 10,000 | $5.10 | $51K | SEC |
Who owns GGB? Hedge funds and superinvestors
9 13F filers hold GGB among their 50 largest positions, worth $319.5M combined. The biggest bets by portfolio weight are Contrarian Capital Management, L.l.c. (25.2%), Aquamarine Financial (Cayman) Ltd (3.7%) and Ninety One North America, Inc. (1.8%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Contrarian Capital Management, L.l.c.Hedge fund | 25.2% | $77.0M | 19,069,112 | +0.0% shares | Q2 2026 |
| Donald Smith & Co., Inc.Hedge fund | 1.3% | $70.7M | 17,490,810 | -27.5% shares | Q2 2026 |
| Aquamarine Financial (Cayman) LtdHedge fund | 3.7% | $67.6M | 16,726,171 | +0.0% shares | Q2 2026 |
| Ninety One North America, Inc.Hedge fund | 1.8% | $38.8M | 8,211,800 | — | Q3 2026 |
| Itau Unibanco Holding S.A.Bank & trust | 0.7% | $34.3M | 8,511,525 | +37.1% shares | Q2 2026 |
| Engineers Gate Manager LPHedge fund | 0.4% | $28.3M | 7,010,275 | — | Q2 2026 |
| Navi International - Administradora e Gestora de Recursos Financeiros Ltda.Institutional asset manager | 1.6% | $2.2M | 550,000 | +0.0% shares | Q2 2026 |
| Larch Capital Partners LLCAsset manager | 0.1% | $506K | 125,136 | -6.7% shares | Q2 2026 |
| Kapitalo Investimentos LtdaInvestment manager | 0.0% | $89K | 18,806 | -98.7% shares | Q3 2026 |
Each manager counts with its latest 13F (Q3 2026: 2, Q2 2026: 7). Screen GGB in the grand portfolio →
GGB stock trades by members of Congress
No member of Congress has disclosed a trade in GGB.
GGB questions and answers
Are insiders buying GGB stock?
Between Aug 1, 2026 and Oct 29, 2026, 5 GGB insiders filed 5 sales worth $1.3M on SEC Form 4, and no open-market purchases.
Which hedge funds own GGB?
9 13F filers hold GGB among their 50 largest positions, worth $319.5M combined. The biggest bets by portfolio weight are Contrarian Capital Management, L.l.c. (25.2%), Aquamarine Financial (Cayman) Ltd (3.7%) and Ninety One North America, Inc. (1.8%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
Has Congress traded GGB?
No member of Congress has disclosed a trade in GGB.
Who is the largest holder of GGB?
Among 13F filers, Contrarian Capital Management, L.l.c. reports the largest GGB position, $77.0M (19,069,112 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Contrarian Capital Management, L.l.c.'s: 25.2% of its portfolio.
Cite or share this
Free to use with a link back. The data updates every filing day.