INSIDER
01Overview02Follow the Money03Daily Brief04Live05Congress06Corporate Insiders07Government Money08Political Influence09Institutions10Washington Network11Follow the Power12Disclosure Clock13AI Investigator14Watchlist
ConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodologyMatch reviewLaunch readiness
Data sources

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

RH CHAIN…
OverviewFollow the MoneyDaily BriefLiveCongressCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodologyMatch reviewLaunch readiness
01Overview02Follow the Money03Daily Brief04Live05Congress06Corporate Insiders07Government Money08Political Influence09Institutions10Washington Network11Follow the Power12Disclosure Clock13AI Investigator14Watchlist
ConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodologyMatch reviewLaunch readiness
OverviewFollow the MoneyDaily BriefLiveCongressCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodologyMatch reviewLaunch readiness
Data sources
SEC FORM 45h ago
HOUSE PTR5h ago
SEC 13F5h ago
ROBINHOOD CHAIN5h ago
SEC FORM 4/Tax withholdingVerified data

Howell Stephen Mitchell Jr. reported RIOT

COO · Riot Platforms, Inc. · Common Stock

Side
F
Value
$374K
Shares
29.5K
Price
$12.67
Executed
Jan 1, 2026
Disclosed
Jan 5, 2026
Disclosure timeline4 days from execution to publication · legal deadline 2 business days
Jan 1 executedJan 5, 2026 disclosed

RIOT · 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
15/ 100 · ROUTINE
Methodology →
  • Transaction type0 / 20

    Tax withholding — administrative, little informational value

  • Relative size+7 / 25

$374K reported value · 2.1% of prior position

  • Filing timing0 / 15

    Disclosed 2 business days after execution (deadline: 2)

  • Historical behavior+8 / 15

    First recorded trade by this actor in this security

  • 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 · RIOT

    ScoreActorSecuritySideValueExecutedDisclosedLagSourceEvidence
    12
    HM
    Howell Stephen Mitchell Jr.COO
    RIOTRiot Platforms, Inc.
    Gift
    		G—
    21.2K sh
    		Aug 12, 2026Aug 14, 2026
    traded Aug 12, 2026
    		+2dSEC FORM 4

    Evidence

    4
    WD
    Werner Ryan D.SVP, CAO
    RIOTRiot Platforms, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$59K
    2,501 sh
    		Aug 5, 2026Aug 7, 2026
    traded Aug 5, 2026
    		+2dSEC FORM 4

    Evidence

    4
    WD
    Werner Ryan D.SVP, CAO
    RIOTRiot Platforms, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$224K
    9,802 sh
    		Aug 5, 2026Aug 7, 2026
    traded Aug 5, 2026
    		+2dSEC FORM 4

    Evidence

    7
    WD
    Werner Ryan D.SVP, CAO
    RIOTRiot Platforms, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$779K
    35.4K sh
    		Aug 5, 2026Aug 7, 2026
    traded Aug 5, 2026
    		+2dSEC FORM 4

    Evidence

    23
    LJ
    Leverton JaimeDirector
    RIOTRiot Platforms, Inc.
    Grant or award
    		A—
    8,347 sh
    		Jul 1, 2026Jul 6, 2026
    traded Jul 1, 2026
    		+5dSEC FORM 4

    Evidence

    23
    TJ
    Turner Michael JohnDirector
    RIOTRiot Platforms, Inc.
    Grant or award
    		A—
    8,347 sh
    		Jul 1, 2026Jul 6, 2026
    traded Jul 1, 2026
    		+5dSEC FORM 4

    Evidence

    23
    MD
    Mouton DouglasDirector
    RIOTRiot Platforms, Inc.
    Grant or award
    		A—
    8,347 sh
    		Jul 1, 2026Jul 6, 2026
    traded Jul 1, 2026
    		+5dSEC FORM 4

    Evidence

    21
    HM
    Howell Stephen Mitchell Jr.COO
    RIOTRiot Platforms, Inc.
    Tax withholding
    		F$526K
    22.0K sh
    		Jul 1, 2026Jul 6, 2026
    traded Jul 1, 2026
    		+5dSEC FORM 4

    Evidence

    12
    WD
    Werner Ryan D.SVP, CAO
    RIOTRiot Platforms, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$761K
    25.4K sh
    		Jun 22, 2026Jun 24, 2026
    traded Jun 22, 2026
    		+2dSEC FORM 4

    Evidence

    19
    LJ
    Les JasonDirector, CEO
    RIOTRiot Platforms, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$1.89M
    62.7K sh
    		Jun 22, 2026Jun 24, 2026
    traded Jun 22, 2026
    		+2dSEC FORM 4

    Evidence

    11
    WD
    Werner Ryan D.SVP, CAO
    RIOTRiot Platforms, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$997K
    37.6K sh
    		May 27, 2026May 29, 2026
    traded May 27, 2026
    		+2dSEC FORM 4

    Evidence

    9
    GJ
    Gibbs JonathanCDCO (See Remarks)
    RIOTRiot Platforms, Inc.
    Disposition to issuer
    		D—
    1.15M sh
    		Apr 12, 2026Apr 14, 2026
    traded Apr 12, 2026
    		+2dSEC FORM 4

    Evidence

    13
    HM
    Howell Stephen Mitchell Jr.COO
    RIOTRiot Platforms, Inc.
    Grant or award
    		A—
    197.3K sh
    		Jan 1, 2026Jan 5, 2026
    traded Jan 1, 2026
    		+4dSEC FORM 4

    Evidence

    21
    GJ
    Gibbs JonathanCDCO
    RIOTRiot Platforms, Inc.
    Grant or award
    		A—
    473.6K sh
    		Jan 1, 2026Jan 5, 2026
    traded Jan 1, 2026
    		+4dSEC FORM 4

    Evidence

    17
    GJ
    Gibbs JonathanCDCO
    RIOTRiot Platforms, Inc.
    Grant or award
    		A—
    236.8K sh
    		Jan 1, 2026Jan 5, 2026
    traded Jan 1, 2026
    		+4dSEC FORM 4

    Evidence

    17
    HM
    Howell Stephen Mitchell Jr.COO
    RIOTRiot Platforms, Inc.
    Grant or award
    		A—
    394.6K sh
    		Jan 1, 2026Jan 5, 2026
    traded Jan 1, 2026
    		+4dSEC FORM 4

    Evidence

    19
    GJ
    Gibbs JonathanCDCO
    RIOTRiot Platforms, Inc.
    Tax withholding
    		F$942K
    60.9K sh
    		Dec 1, 2025Dec 3, 2025
    traded Dec 1, 2025
    		+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
    0002025334-26-000002
    Machine-readable
    Structured copy

    Timestamps

    Event (reported)
    Jan 1, 2026
    Published
    Jan 5, 2026
    Ingested by INSIDER
    Nov 5, 04:24 UTC
    Last re-read
    Nov 5, 04:24 UTC

    Extracted facts

    Filer
    Howell Stephen Mitchell Jr.
    Role
    COO
    Transaction
    Tax withholdingAs filed: “F”
    Asset
    Riot Platforms, Inc.
    Ticker
    RIOT
    Shares
    29.5K
    Price per share
    $12.67
    Value
    $373,537
    Execution date (reported)
    Jan 1, 2026
    Owned after transaction
    1.44M shares
    Days from execution to publication
    4

    Calculation

    Value = shares × reported price per share

    • Shares: 29.5K
    • Price: $12.67

    = $373,537

    What this establishes

    Howell Stephen Mitchell Jr. filed this Form 4 reporting a tax withholding of RIOT on Jan 1, 2026. It became public on Jan 5, 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
    COO
    Howell Stephen Mitchell Jr.cik:0002025334
    Issuer
    Riot Platforms, Inc.cik:0001167419

    Revision history · 0

    No field has changed since this record was first ingested.

    Company events

    No records

    No material filings recorded for this issuer.