Key facts
- This page summarizes Claudio Johannpeter's Form 4 filing for GERDAU S.A. (GGB).
- 1 reported transaction and 3 derivative rows are listed below.
- Accepted by SEC: 25 Sep 2026, 16:32.
Claudio Johannpeter - 23 Sep 2026 Form 4 Insider Report for GERDAU S.A. (GGB)
- Reporting relationship
- Vice-Chairman of Board
- Issuer ticker
- GGB
- Reported as of
- 23 Sep 2026
- Net transaction value
- -$422,899
- SEC form
- 4
- Accepted by SEC
- 25 Sep 2026, 16:32:21 UTC
- Prior SEC filing
- 18 Mar 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/Claudio Johannpeter
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Claudio Johannpeter filed Form 4 for GERDAU S.A. (GGB) on 25 Sep 2026.
Change
- Previous filing in this sequence was filed on 18 Mar 2026.
- Current net transaction value: -$422,899.
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
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0002121148
Primary reporting owner
Johannpeter Claudio
- Relationship
- Vice-Chairman of Board
- Address
- AVENUE DOUTORA RUTH DE CARDOSO, 8501, 8TH FLOOR, PINHEIROS, SAO PAULO
- Signature
- /s/Claudio Johannpeter
- Signature date
- 25 Sep 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
GGB
transaction
Preferred shares
Sale
- Transaction value
- $422,899
- Shares
- -85,607
- Change %
- -100%
- Price
- $4.94
- Shares after
- 0
- Date
- 23 Sep 2026
- Ownership
- Direct
- Footnotes
- F1
GGB
holding
Common shares
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 702,952,615
- Date
- 23 Sep 2026
- Ownership
- Remarks
- Footnotes
- F5
GGB
holding
Preferred shares
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 283
- Date
- 23 Sep 2026
- Ownership
- Preferred shares held by an immediate family member (relationship: son).
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
- 106,519
- Date
- 23 Sep 2026
- Ownership
- Direct
- Underlying class
- Preferred shares
- Underlying amount
- 106,519
- Exercise price
- $3.79
- Footnotes
- F1, F2
GGB
holding
Derivative
Restricted Stock Units
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 116,745
- Date
- 23 Sep 2026
- Ownership
- Direct
- Underlying class
- Preferred shares
- Underlying amount
- 116,745
- Exercise price
- $3.56
- Footnotes
- F1, F3
GGB
holding
Derivative
Restricted Stock Units
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 105,670
- Date
- 23 Sep 2026
- Ownership
- Direct
- Underlying class
- Preferred shares
- Underlying amount
- 105,670
- Exercise price
- $4.05
- Footnotes
- F1, F4
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 5 footnotes
Footnote F1
The price is denominated in Brazilian reais and has been translated into U.S. dollars at the September 23, 2026 selling rate of R$5.1414 per US$1.00, as reported by the Central Bank of Brazil.
Footnote F2
Restricted stock units vest on February 12, 2027.
Footnote F3
Restricted stock units vest on February 12, 2028.
Footnote F4
Restricted stock units vest on February 12, 2029.
Footnote F5
The Reporting Person has a 20% interest in Klapar Participacoes S.A.. Klapar Participacoes S.A holds a 25% equity interest in INDAC - Investimentos e Participacoes S.A. INDAC owns 57% of Grupo Gerdau Empreendimentos Ltda. INDAC holds 100% of Acoter Participacoes Ltda. Acoter Participacoes Ltda. owns the remaining 43% of Grupo Gerdau Empreendimentos Ltda. Grupo Gerdau Empreendimentos Ltda., together with INDAC, jointly controls Gerdau Metalurgica S.A. The Reporting Person disclaims beneficial ownership of the reported securities except to the extent of their pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose.