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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 435m ago
HOUSE PTR35m ago
SEC 13F35m ago
ROBINHOOD CHAIN35m ago
SEC FORM 4/Grant or awardVerified data

Gilson Michelle reported ACLX

CHIEF FINANCIAL OFFICER · Arcellx, Inc. · Arcellx, Inc. — Performance-based Restricted Stock Unit

Side
A
Value
—
Shares
59.0K
Price
—
Executed
Apr 28, 2026
Disclosed
Apr 28, 2026
Disclosure timeline0 days from execution to publication · legal deadline 2 business days
Apr 28 executedApr 28, 2026 disclosed

ACLX · 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
9/ 100 · ROUTINE
Methodology →
  • Transaction type0 / 20

    Grant or award — administrative, little informational value

  • Relative size+1 / 25

No reported dollar value · new position

  • Filing timing0 / 15

    Disclosed 0 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 · ACLX

    ScoreActorSecuritySideValueExecutedDisclosedLagSourceEvidence
    9
    MK
    Myers KristinDirector
    ACLXArcellx, Inc.
    Disposition to issuer
    		D—
    16.8K sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    MK
    Myers KristinDirector
    ACLXArcellx, Inc.
    Disposition to issuer
    		D—
    1,784 sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    GM
    Gilson MichelleCHIEF FINANCIAL OFFICER
    ACLXArcellx, Inc.
    Tender of shares
    		U—
    67.0K sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    GM
    Gilson MichelleCHIEF FINANCIAL OFFICER
    ACLXArcellx, Inc.
    Tender of shares
    		U—
    5,000 sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    GM
    Gilson MichelleCHIEF FINANCIAL OFFICER
    ACLXArcellx, Inc.
    Disposition to issuer
    		D—
    40.2K sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    GM
    Gilson MichelleCHIEF FINANCIAL OFFICER
    ACLXArcellx, Inc.
    Disposition to issuer
    		D—
    32.5K sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    GM
    Gilson MichelleCHIEF FINANCIAL OFFICER
    ACLXArcellx, Inc.
    Disposition to issuer
    		D—
    70.8K sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    GM
    Gilson MichelleCHIEF FINANCIAL OFFICER
    ACLXArcellx, Inc.
    Disposition to issuer
    		D—
    94.6K sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    GM
    Gilson MichelleCHIEF FINANCIAL OFFICER
    ACLXArcellx, Inc.
    Disposition to issuer
    		D—
    20.5K sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    GM
    Gilson MichelleCHIEF FINANCIAL OFFICER
    ACLXArcellx, Inc.
    Disposition to issuer
    		D—
    61.6K sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    GM
    Gilson MichelleCHIEF FINANCIAL OFFICER
    ACLXArcellx, Inc.
    Disposition to issuer
    		D—
    88.5K sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    GM
    Gilson MichelleCHIEF FINANCIAL OFFICER
    ACLXArcellx, Inc.
    Disposition to issuer
    		D—
    59.0K sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    HC
    Heery ChristopherCHIEF MEDICAL OFFICER
    ACLXArcellx, Inc.
    Tender of shares
    		U—
    23.7K sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    HC
    Heery ChristopherCHIEF MEDICAL OFFICER
    ACLXArcellx, Inc.
    Disposition to issuer
    		D—
    10.9K sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    HC
    Heery ChristopherCHIEF MEDICAL OFFICER
    ACLXArcellx, Inc.
    Disposition to issuer
    		D—
    43.6K sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    HC
    Heery ChristopherCHIEF MEDICAL OFFICER
    ACLXArcellx, Inc.
    Disposition to issuer
    		D—
    132.4K sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    HC
    Heery ChristopherCHIEF MEDICAL OFFICER
    ACLXArcellx, Inc.
    Disposition to issuer
    		D—
    40.0K sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    HC
    Heery ChristopherCHIEF MEDICAL OFFICER
    ACLXArcellx, Inc.
    Disposition to issuer
    		D—
    76.2K sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    HC
    Heery ChristopherCHIEF MEDICAL OFFICER
    ACLXArcellx, Inc.
    Disposition to issuer
    		D—
    60.1K sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    HC
    Heery ChristopherCHIEF MEDICAL OFFICER
    ACLXArcellx, Inc.
    Disposition to issuer
    		D—
    13.0K sh
    		Apr 28, 2026Apr 28, 2026
    traded Apr 28, 2026
    		+0dSEC 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
    0001930862-26-000008
    Machine-readable
    Structured copy

    Timestamps

    Event (reported)
    Apr 28, 2026
    Published
    Apr 28, 2026
    Ingested by INSIDER
    Nov 5, 04:02 UTC
    Last re-read
    Nov 5, 04:02 UTC

    Extracted facts

    Filer
    Gilson Michelle
    Role
    CHIEF FINANCIAL OFFICER
    Transaction
    Grant or awardAs filed: “A”
    Asset
    Arcellx, Inc. — Performance-based Restricted Stock Unit
    Ticker
    ACLX
    Shares
    59.0K
    Execution date (reported)
    Apr 28, 2026
    Owned after transaction
    59.0K shares
    Days from execution to publication
    0

    What this establishes

    Gilson Michelle filed this Form 4 reporting a grant or award of ACLX on Apr 28, 2026. It became public on Apr 28, 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
    CHIEF FINANCIAL OFFICER
    Gilson Michellecik:0001930862
    Issuer
    Arcellx, Inc.cik:0001786205

    Revision history · 0

    No field has changed since this record was first ingested.

    Company events

    No records

    No material filings recorded for this issuer.

    Source error

    Price history for ACLX is unavailable.

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