StockCIK 1073404
GERDAU S.A. (GGB): Insider Trades and Fund Holdings
In the past 12 months, GERDAU S.A. insiders reported 0 open-market purchases worth $0 and 3 sales worth $740K; 0 of the sales were reported as made under a 10b5-1 trading plan.
0Insider buys, 12 months
$0Bought by insiders, 12 months
$740KSold by insiders, 12 months
2Tracked funds holding
Recent insider trades
Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Sep 25, 2026.
| Filed | Insider | Type | Value |
|---|---|---|---|
| Sep 25 | Claudio JohannpeterOther | ▼ SELL | $423K |
| Sep 21 | Rafael Gamboa LopesOther | ▼ SELL | $264K |
| Aug 14 | Marcos Zilles MattielloOther | ▼ SELL | $53K |
Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings
Insiders who traded in the past year
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| Claudio Johannpeter | Other | 0 | $0 | 1 | $423K |
| Rafael Gamboa Lopes | Other | 0 | $0 | 1 | $264K |
| Marcos Zilles Mattiello | Other | 0 | $0 | 1 | $53K |
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Tracked funds that report GGB
From each fund's latest 13F. Holdings are as of quarter end and are filed up to 45 days later.
| Fund | Shares | Value | Change |
|---|---|---|---|
| Renaissance Technologies | 6,902,124 | $27.9M | ▼ −36.9% |
| Bridgewater Associates | 271,680 | $1.10M | ▲ +464.0% |
Source: SEC Form 13F-HR filings, retrieved Oct 28, 2026. How we read filings
Reading these numbers
Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →