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Data sources

Public disclosures only. Scores flag unusual patterns and are not evidence of wrongdoing. Not investment advice.

RH CHAIN…
OverviewDaily BriefLiveCongressCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProMethodologyMatch reviewLaunch readiness
01Overview02Daily Brief03Live04Congress05Corporate Insiders06Government Money07Political Influence08Institutions09Washington Network10Follow the Power11Disclosure Clock12AI Investigator13Watchlist
ConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProMethodologyMatch reviewLaunch readiness
OverviewDaily BriefLiveCongressCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProMethodologyMatch reviewLaunch readiness
Data sources
SEC FORM 439m ago
HOUSE PTR39m ago
SEC 13F39m ago
ROBINHOOD CHAIN39m ago
SEC FORM 4/Open-market saleVerified data

Mattiello Marcos Zilles sold GGB

Senior Management · GERDAU S.A. · Preferred shares

Side
SELL
Value
$53K
Shares
10.4K
Price
$5.11
Executed
Jun 8, 2026
Disclosed
Aug 14, 2026
Disclosure timeline67 days from execution to publication · legal deadline 2 business days
Jun 8 executedAug 14, 2026 disclosed

GGB · daily

Yahoo Finance chart API
▲Execution▼Disclosure●Material company filing●Other disclosed buy●Other disclosed sellUnofficial public endpoint; daily OHLCV, split-adjusted. Replace with a licensed feed for production.

Insider Score

Experimental signal
61/ 100 · NOTABLE
Methodology →
  • Transaction type+12 / 20

    Open-market sale

  • Relative size+16 / 25

    $53K reported value · 100.0% of prior position

  • Filing timing+15 / 15

    Disclosed 49 business days after execution (deadline: 2)

  • Historical behavior+8 / 15

    First recorded trade by this actor in this security

  • Frequency & clustering+10 / 15

    2 other actors traded the same direction within 14 days

  • Market events0 / 10

    No material company filing within 60 days after the trade

    • The Insider Score measures how far a disclosure deviates from normal filing patterns. A high score is a prompt for research, not evidence of illegal insider trading.

    Other disclosed activity · GGB

    ScoreActorSecuritySideValueExecutedDisclosedLagSourceEvidence
    44
    JC
    Johannpeter ClaudioVice-Chairman of Board
    GGBGERDAU S.A.
    Open-market sale
    		SELL$423K
    85.6K sh
    		Sep 23, 2026Sep 25, 2026
    traded Sep 23, 2026
    		+2dSEC FORM 4

    Evidence

    40
    LG
    Lopes Rafael GamboaExecutive Vice President
    GGBGERDAU S.A.
    Open-market sale
    		SELL$264K
    51.8K sh
    		Sep 17, 2026Sep 21, 2026
    traded Sep 17, 2026
    		+4dSEC FORM 4

    Evidence

    26
    WF
    Wahrhaftig Marcos Eduardo FaracoExecutive Vice President
    GGBGERDAU S.A.
    Grant or award
    		A$404K
    107.7K sh
    		Jul 15, 2026Aug 27, 2026
    traded Jul 15, 2026
    		+43dSEC FORM 4

    Evidence

    40
    JG
    Johannpeter Andre Bier GerdauChairman of Board of Directors
    GGBGERDAU S.A.
    Open-market sale
    		SELL$490K
    99.2K sh
    		Aug 10, 2026Aug 12, 2026
    traded Aug 10, 2026
    		+2dSEC FORM 4

    Evidence

    29
    JD
    Japur Rafael DornelesVP, CFO and IR Officer
    GGBGERDAU S.A.
    Open-market sale
    		SELL$51K
    10.0K sh
    		Aug 6, 2026Aug 10, 2026
    traded Aug 6, 2026
    		+4dSEC FORM 4

    Evidence

    54
    DW
    Da Cunha Gustavo WerneckCEO and Board Member
    GGBGERDAU S.A.
    Open-market purchase
    		BUY$782K
    165.2K sh
    		Jun 12, 2026Jun 15, 2026
    traded Jun 12, 2026
    		+3dSEC FORM 4

    Evidence

    47
    WY
    Wang Chia YuanSenior Management
    GGBGERDAU S.A.
    Open-market sale
    		SELL$139K
    30.9K sh
    		Jun 2, 2026Jun 3, 2026
    traded Jun 2, 2026
    		+1dSEC FORM 4

    Evidence

    40
    MM
    Metz MauricioExecutive Vice President
    GGBGERDAU S.A.
    Open-market sale
    		SELL$34K
    7,000 sh
    		Jun 2, 2026Jun 3, 2026
    traded Jun 2, 2026
    		+1dSEC FORM 4

    Evidence

    36
    MM
    Metz MauricioExecutive Vice President
    GGBGERDAU S.A.
    Open-market sale
    		SELL$24K
    5,000 sh
    		May 26, 2026May 28, 2026
    traded May 26, 2026
    		+2dSEC FORM 4

    Evidence

    36
    JD
    Japur Rafael DornelesVP, CFO and IR Officer
    GGBGERDAU S.A.
    Open-market sale
    		SELL$24K
    5,000 sh
    		May 22, 2026May 26, 2026
    traded May 22, 2026
    		+4dSEC FORM 4

    Evidence

    54
    PR
    Peres Cesar Obino da RosaOfficer
    GGBGERDAU S.A.
    Open-market sale
    		SELL$37K
    8,000 sh
    		May 19, 2026May 22, 2026
    traded May 19, 2026
    		+3dSEC FORM 4

    Evidence

    36
    MM
    Metz MauricioExecutive Vice President
    GGBGERDAU S.A.
    Open-market sale
    		SELL$24K
    5,000 sh
    		May 13, 2026May 15, 2026
    traded May 13, 2026
    		+2dSEC FORM 4

    Evidence

    17
    DW
    Da Cunha Gustavo WerneckCEO and Board Member
    GGBGERDAU S.A.
    Grant or award
    		A—
    432.8K sh
    		May 8, 2026May 12, 2026
    traded May 8, 2026
    		+4dSEC FORM 4

    Evidence

    53
    DW
    Da Cunha Gustavo WerneckCEO and Board Member
    GGBGERDAU S.A.
    Open-market sale
    		SELL$2.11M
    432.9K sh
    		May 8, 2026May 12, 2026
    traded May 8, 2026
    		+4dSEC FORM 4

    Evidence

    38
    MM
    Metz MauricioExecutive Vice President
    GGBGERDAU S.A.
    Open-market sale
    		SELL$9,380
    2,000 sh
    		May 5, 2026May 8, 2026
    traded May 5, 2026
    		+3dSEC FORM 4

    Evidence

    47
    WY
    Wang Chia YuanSenior management
    GGBGERDAU S.A.
    Open-market sale
    		SELL$190K
    40.0K sh
    		May 5, 2026May 7, 2026
    traded May 5, 2026
    		+2dSEC FORM 4

    Evidence

    56
    DW
    Da Cunha Gustavo WerneckCEO and Board Member
    GGBGERDAU S.A.
    Open-market sale
    		SELL$396K
    88.0K sh
    		Apr 28, 2026May 5, 2026
    traded Apr 28, 2026
    		+7dSEC FORM 4

    Evidence

    43
    WY
    Wang Chia YuanSenior management
    GGBGERDAU S.A.
    Open-market sale
    		SELL$91K
    20.0K sh
    		Apr 30, 2026May 4, 2026
    traded Apr 30, 2026
    		+4dSEC FORM 4

    Evidence

    51
    UC
    Uhlein ClemirSenior Management
    GGBGERDAU S.A.
    Open-market sale
    		SELL$173K
    38.3K sh
    		Apr 28, 2026Apr 30, 2026
    traded Apr 28, 2026
    		+2dSEC FORM 4

    Evidence

    46
    WY
    Wang Chia YuanSenior Management
    GGBGERDAU S.A.
    Open-market sale
    		SELL$344K
    76.7K sh
    		Apr 28, 2026Apr 30, 2026
    traded Apr 28, 2026
    		+2dSEC FORM 4

    Evidence

    Evidence

    Verified data

    Read directly from the primary public document; every field below is as reported by the filer.

    Source

    Document
    SEC Form 4
    Publisher
    U.S. Securities and Exchange Commission (EDGAR)
    Document ID
    0002120298-26-000002
    Machine-readable
    Structured copy

    Timestamps

    Event (reported)
    Jun 8, 2026
    Published
    Aug 14, 2026
    Ingested by INSIDER
    Nov 5, 02:22 UTC
    Last re-read
    Nov 5, 02:22 UTC

    Extracted facts

    Filer
    Mattiello Marcos Zilles
    Role
    Senior Management
    Transaction
    Open-market saleAs filed: “S”
    Asset
    GERDAU S.A.
    Ticker
    GGB
    Shares
    10.4K
    Price per share
    $5.11
    Value
    $53,078
    Execution date (reported)
    Jun 8, 2026
    Owned after transaction
    0 shares
    Days from execution to publication
    67

    Calculation

    Value = shares × reported price per share

    • Shares: 10.4K
    • Price: $5.11

    = $53,078

    What this establishes

    Mattiello Marcos Zilles filed this Form 4 reporting a open-market sale of GGB on Jun 8, 2026. It became public on Aug 14, 2026. The filing establishes the reported transaction and the filer's stated role. It does not establish why the trade was made or what the filer knew.

    Extraction

    Method
    Form 4 XML
    Confidence
    1.00
    Senior Management
    Mattiello Marcos Zillescik:0002120298
    Issuer
    GERDAU S.A.cik:0001073404

    Revision history · 0

    No field has changed since this record was first ingested.

    Company events

    No records

    No material filings recorded for this issuer.