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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 ChainProofTradingTokenProAccountMethodologyMatch reviewLaunch readiness
01Overview02Daily Brief03Live04Congress05Corporate Insiders06Government Money07Political Influence08Institutions09Washington Network10Follow the Power11Disclosure Clock12AI Investigator13Watchlist
ConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodologyMatch reviewLaunch readiness
OverviewDaily BriefLiveCongressCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodologyMatch reviewLaunch readiness
Data sources
SEC FORM 438s ago
HOUSE PTR45m ago
SEC 13F45m ago
ROBINHOOD CHAIN45m ago
SEC FORM 4/Open-market purchaseVerified data

Da Cunha Gustavo Werneck bought GGB

CEO and Board Member · GERDAU S.A. · Preferred shares

Side
BUY
Value
$782K
Shares
165.2K
Price
$4.73
Executed
Jun 12, 2026
Disclosed
Jun 15, 2026
Disclosure timeline3 days from execution to publication · legal deadline 2 business days
Jun 12 executedJun 15, 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
54/ 100 · NOTABLE
Methodology →
  • Transaction type+20 / 20

    Open-market purchase

  • Relative size+19 / 25

    $782K reported value · new position

  • Filing timing0 / 15

    Disclosed 1 business day after execution (deadline: 2)

  • Historical behavior+15 / 15

    Reverses direction: 4 prior trades the other way

  • Frequency & clustering0 / 15

    No clustered activity in the dataset

  • 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

    61
    MZ
    Mattiello Marcos ZillesSenior Management
    GGBGERDAU S.A.
    Open-market sale
    		SELL$53K
    10.4K sh
    		Jun 8, 2026Aug 14, 2026
    traded Jun 8, 2026
    		+67dSEC 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

    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

    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

    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

    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

    32
    MM
    Metz MauricioExecutive Vice President
    GGBGERDAU S.A.
    Open-market sale
    		SELL$4,530
    1,000 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
    0002120774-26-000004
    Machine-readable
    Structured copy

    Timestamps

    Event (reported)
    Jun 12, 2026
    Published
    Jun 15, 2026
    Ingested by INSIDER
    Nov 5, 03:53 UTC
    Last re-read
    Nov 5, 03:53 UTC

    Extracted facts

    Filer
    Da Cunha Gustavo Werneck
    Role
    CEO and Board Member
    Transaction
    Open-market purchaseAs filed: “P”
    Asset
    GERDAU S.A.
    Ticker
    GGB
    Shares
    165.2K
    Price per share
    $4.73
    Value
    $781,510
    Execution date (reported)
    Jun 12, 2026
    Owned after transaction
    165.2K shares
    Days from execution to publication
    3

    Calculation

    Value = shares × reported price per share

    • Shares: 165.2K
    • Price: $4.73

    = $781,510

    What this establishes

    Da Cunha Gustavo Werneck filed this Form 4 reporting a open-market purchase of GGB on Jun 12, 2026. It became public on Jun 15, 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
    CEO and Board Member
    Da Cunha Gustavo Werneckcik:0002120774
    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.