Key facts
- This page summarizes Marcos Zilles Mattiello's Form 3/A - Amendment filing for GERDAU S.A. (GGB).
- 0 reported transactions and 1 derivative row are listed below.
- Accepted by SEC: 14 Aug 2026, 08:45.
Marcos Zilles Mattiello - 06 Aug 2026 Form 3/A - Amendment Insider Report for GERDAU S.A. (GGB)
- Reporting relationship
- Senior management
- Issuer ticker
- GGB
- Reported as of
- 06 Aug 2026
- Net transaction value
- $0
- SEC form
- 3/A - Amendment
- Accepted by SEC
- 14 Aug 2026, 08:45:30 UTC
- Original report date
- 17 Mar 2026
- Prior SEC filing
- 14 Aug 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Marcos Zilles Mattiello
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
Marcos Zilles Mattiello filed Form 3/A - Amendment for GERDAU S.A. (GGB) on 14 Aug 2026.
Change
- Previous filing in this sequence was filed on 14 Aug 2026.
- Current net transaction value: $0.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Official SEC source
View source filing
Ownership activity is grounded in SEC Form 3/A - Amendment disclosures.
Reporting Owners (1)
CIK 0002120298
Primary reporting owner
Mattiello Marcos Zilles
- Relationship
- Senior management
- Address
- AVENUE DOUTORA RUTH DE CARDOSO, 8501, 8TH FLOOR, PINHEIROS, SAO PAULO
- Signature
- /s/ Marcos Zilles Mattiello
- Signature date
- 14 Aug 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
GGB
holding
Preferred shares
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 8,997
- Date
- 06 Aug 2026
- Ownership
- Direct
GGB
holding
Preferred shares
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 10,387
- Date
- 06 Aug 2026
- Ownership
- Direct
- Footnotes
- F1
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
GGB
holding
Derivative
Restricted Stock Units
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- Date
- 06 Aug 2026
- Ownership
- Direct
- Underlying class
- Preferred shares
- Underlying amount
- 18,119
- Exercise price
- $4.04
- Footnotes
- F2
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 2 footnotes
Footnote F1
American Depositary Receipts.
Footnote F2
Restricted stock units vest on March, 1, 2029 (American Depositary Receipts).