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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 42h ago
HOUSE PTR2h ago
SEC 13F2h ago
ROBINHOOD CHAIN2h ago
SEC FORM 4/Open-market saleVerified data

Blumenstock Gerald M sold ACLS

EVP, Research, Dev. & Eng. · AXCELIS TECHNOLOGIES INC · Common Stock

Side
SELL
Value
$271K
Shares
3,034
Price
$89.46
Executed
Dec 11, 2025
Disclosed
Dec 12, 2025
Disclosure timeline1 days from execution to publication · legal deadline 2 business days
Dec 11 executedDec 12, 2025 disclosed

ACLS · 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
31/ 100 · ELEVATED
Methodology →
  • Transaction type+12 / 20

    Open-market sale

  • Relative size+11 / 25

    $271K reported value · 14.0% of prior position

  • Filing timing0 / 15

    Disclosed 1 business day 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 · ACLS

    ScoreActorSecuritySideValueExecutedDisclosedLagSourceEvidence
    5
    TC
    Tatnall ChristopherEVP Global Customer Operations
    ACLSAXCELIS TECHNOLOGIES INC
    Tax withholding
    		F$14K
    136 sh
    		Sep 15, 2026Sep 16, 2026
    traded Sep 15, 2026
    		+1dSEC FORM 4

    Evidence

    5
    RG
    Redinbo GregEVP and Chief Strategy Officer
    ACLSAXCELIS TECHNOLOGIES INC
    Tax withholding
    		F$22K
    208 sh
    		Sep 15, 2026Sep 16, 2026
    traded Sep 15, 2026
    		+1dSEC FORM 4

    Evidence

    9
    RD
    Ryzhik DavidSVP Interim CFO
    ACLSAXCELIS TECHNOLOGIES INC
    Tax withholding
    		F$13K
    76 sh
    		Jun 16, 2026Jun 17, 2026
    traded Jun 16, 2026
    		+1dSEC FORM 4

    Evidence

    8
    BM
    Blumenstock Gerald MEVP, Research, Dev. & Eng.
    ACLSAXCELIS TECHNOLOGIES INC
    Tax withholding
    		F$97K
    506 sh
    		Jun 15, 2026Jun 16, 2026
    traded Jun 15, 2026
    		+1dSEC FORM 4

    Evidence

    39
    MJ
    Mahoney Robert JohnEVP Global Operations
    ACLSAXCELIS TECHNOLOGIES INC
    Open-market sale
    		SELL$179K
    1,155 sh
    		Jun 2, 2026Jun 3, 2026
    traded Jun 2, 2026
    		+1dSEC FORM 4

    Evidence

    46
    ST
    Sutton ToddVP Corporate Controller
    ACLSAXCELIS TECHNOLOGIES INC
    Open-market sale
    		SELL$320K
    2,000 sh
    		May 27, 2026May 28, 2026
    traded May 27, 2026
    		+1dSEC FORM 4

    Evidence

    39
    BM
    Blumenstock Gerald MEVP, Research, Dev. & Eng.
    ACLSAXCELIS TECHNOLOGIES INC
    Open-market sale
    		SELL$177K
    1,161 sh
    		May 21, 2026May 22, 2026
    traded May 21, 2026
    		+1dSEC FORM 4

    Evidence

    39
    TC
    Tatnall ChristopherEVP Global Customer Operations
    ACLSAXCELIS TECHNOLOGIES INC
    Open-market sale
    		SELL$175K
    1,166 sh
    		May 20, 2026May 21, 2026
    traded May 20, 2026
    		+1dSEC FORM 4

    Evidence

    5
    MJ
    Mahoney Robert JohnEVP Global Operations
    ACLSAXCELIS TECHNOLOGIES INC
    Tax withholding
    		F$27K
    182 sh
    		May 18, 2026May 20, 2026
    traded May 18, 2026
    		+2dSEC FORM 4

    Evidence

    5
    RG
    Redinbo GregEVP MARKETING AND APPLICATIONS
    ACLSAXCELIS TECHNOLOGIES INC
    Tax withholding
    		F$16K
    111 sh
    		May 18, 2026May 20, 2026
    traded May 18, 2026
    		+2dSEC FORM 4

    Evidence

    5
    RG
    Redinbo GregEVP MARKETING AND APPLICATIONS
    ACLSAXCELIS TECHNOLOGIES INC
    Tax withholding
    		F$12K
    79 sh
    		May 18, 2026May 20, 2026
    traded May 18, 2026
    		+2dSEC FORM 4

    Evidence

    46
    QJ
    Quirk JeanneDirector
    ACLSAXCELIS TECHNOLOGIES INC
    Open-market sale
    		SELL$251K
    1,789 sh
    		May 19, 2026May 20, 2026
    traded May 19, 2026
    		+1dSEC FORM 4

    Evidence

    5
    ST
    Sutton ToddVP Corporate Controller
    ACLSAXCELIS TECHNOLOGIES INC
    Tax withholding
    		F$27K
    184 sh
    		May 18, 2026May 20, 2026
    traded May 18, 2026
    		+2dSEC FORM 4

    Evidence

    5
    MJ
    Mahoney Robert JohnEVP Global Operations
    ACLSAXCELIS TECHNOLOGIES INC
    Tax withholding
    		F$19K
    130 sh
    		May 18, 2026May 20, 2026
    traded May 18, 2026
    		+2dSEC FORM 4

    Evidence

    9
    MJ
    Mahoney Robert JohnEVP Global Operations
    ACLSAXCELIS TECHNOLOGIES INC
    Grant or award
    		A—
    1,947 sh
    		May 15, 2026May 19, 2026
    traded May 15, 2026
    		+4dSEC FORM 4

    Evidence

    8
    MJ
    Mahoney Robert JohnEVP Global Operations
    ACLSAXCELIS TECHNOLOGIES INC
    Tax withholding
    		F$58K
    372 sh
    		May 15, 2026May 19, 2026
    traded May 15, 2026
    		+4dSEC FORM 4

    Evidence

    5
    MJ
    Mahoney Robert JohnEVP Global Operations
    ACLSAXCELIS TECHNOLOGIES INC
    Tax withholding
    		F$9,466
    61 sh
    		May 15, 2026May 19, 2026
    traded May 15, 2026
    		+4dSEC FORM 4

    Evidence

    9
    RD
    Ryzhik DavidSVP Interim CFO
    ACLSAXCELIS TECHNOLOGIES INC
    Tax withholding
    		F$35K
    226 sh
    		May 15, 2026May 19, 2026
    traded May 15, 2026
    		+4dSEC FORM 4

    Evidence

    9
    TC
    Tatnall ChristopherEVP Global Customer Operations
    ACLSAXCELIS TECHNOLOGIES INC
    Tax withholding
    		F$26K
    170 sh
    		May 15, 2026May 19, 2026
    traded May 15, 2026
    		+4dSEC FORM 4

    Evidence

    13
    TC
    Tatnall ChristopherEVP Global Customer Operations
    ACLSAXCELIS TECHNOLOGIES INC
    Grant or award
    		A—
    3,504 sh
    		May 15, 2026May 19, 2026
    traded May 15, 2026
    		+4dSEC 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
    0001979418-25-000004
    Machine-readable
    Structured copy

    Timestamps

    Event (reported)
    Dec 11, 2025
    Published
    Dec 12, 2025
    Ingested by INSIDER
    Nov 5, 04:28 UTC
    Last re-read
    Nov 5, 04:28 UTC

    Extracted facts

    Filer
    Blumenstock Gerald M
    Role
    EVP, Research, Dev. & Eng.
    Transaction
    Open-market saleAs filed: “S”
    Asset
    AXCELIS TECHNOLOGIES INC
    Ticker
    ACLS
    Shares
    3,034
    Price per share
    $89.46
    Value
    $271,422
    Execution date (reported)
    Dec 11, 2025
    Owned after transaction
    18.7K shares
    Days from execution to publication
    1

    Calculation

    Value = shares × reported price per share

    • Shares: 3,034
    • Price: $89.46

    = $271,422

    What this establishes

    Blumenstock Gerald M filed this Form 4 reporting a open-market sale of ACLS on Dec 11, 2025. It became public on Dec 12, 2025. 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
    EVP, Research, Dev. & Eng.
    Blumenstock Gerald Mcik:0001979418
    Issuer
    AXCELIS TECHNOLOGIES INCcik:0001113232

    Revision history · 0

    No field has changed since this record was first ingested.

    Company events

    No records

    No material filings recorded for this issuer.