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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 49m ago
HOUSE PTR8m ago
SEC 13F8m ago
ROBINHOOD CHAIN8m ago
SEC FORM 4/Option exerciseVerified dataRule 10b5-1 plan

McCallion Kevin J. reported MASS

SVP, Products and Production · 908 Devices Inc. · 908 Devices Inc. — Stock Option (right to buy)

Side
M
Value
—
Shares
2,693
Price
—
Executed
Apr 10, 2026
Disclosed
Apr 14, 2026
Disclosure timeline4 days from execution to publication · legal deadline 2 business days
Apr 10 executedApr 14, 2026 disclosed

MASS · 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
0/ 100 · ROUTINE
Methodology →
  • Transaction type0 / 20

    Option exercise — administrative, little informational value

  • Relative size+1 / 25

No reported dollar value · new position

  • Filing timing0 / 15

    Disclosed 2 business days after execution (deadline: 2)

  • Historical behavior+4 / 15

    3 prior trades recorded 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

  • Pre-arranged plan-10

    Executed under a Rule 10b5-1 trading plan

    • 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 · MASS

    ScoreActorSecuritySideValueExecutedDisclosedLagSourceEvidence
    0
    BD
    Brown Christopher D.Director
    MASS908 Devices Inc.
    Option exercise · 10b5-1 plan
    		M—
    60.0K sh
    		Oct 7, 2026Oct 9, 2026
    traded Oct 7, 2026
    		+2dSEC FORM 4

    Evidence

    0
    BD
    Brown Christopher D.Director
    MASS908 Devices Inc.
    Option exercise · 10b5-1 plan
    		M$105K
    60.0K sh
    		Oct 7, 2026Oct 9, 2026
    traded Oct 7, 2026
    		+2dSEC FORM 4

    Evidence

    9
    BD
    Brown Christopher D.Director
    MASS908 Devices Inc.
    Open-market sale · 10b5-1 plan
    		SELL$357K
    30.0K sh
    		Oct 7, 2026Oct 9, 2026
    traded Oct 7, 2026
    		+2dSEC FORM 4

    Evidence

    13
    GH
    Griffith Joseph H. IVChief Financial Officer
    MASS908 Devices Inc.
    Open-market sale · 10b5-1 plan
    		SELL$65K
    5,000 sh
    		Oct 6, 2026Oct 8, 2026
    traded Oct 6, 2026
    		+2dSEC FORM 4

    Evidence

    3
    KJ
    Kenneweg JohnSVP, Sales & Product Marketing
    MASS908 Devices Inc.
    Option exercise · 10b5-1 plan
    		M$21K
    21.4K sh
    		Sep 16, 2026Sep 17, 2026
    traded Sep 16, 2026
    		+1dSEC FORM 4

    Evidence

    6
    KJ
    Kenneweg JohnSVP, Sales & Product Marketing
    MASS908 Devices Inc.
    Open-market sale · 10b5-1 plan
    		SELL$10K
    1,000 sh
    		Sep 15, 2026Sep 17, 2026
    traded Sep 15, 2026
    		+2dSEC FORM 4

    Evidence

    0
    KJ
    Kenneweg JohnSVP, Sales & Product Marketing
    MASS908 Devices Inc.
    Option exercise · 10b5-1 plan
    		M$960
    1,000 sh
    		Sep 15, 2026Sep 17, 2026
    traded Sep 15, 2026
    		+2dSEC FORM 4

    Evidence

    8
    KJ
    Kenneweg JohnSVP, Sales & Product Marketing
    MASS908 Devices Inc.
    Open-market sale · 10b5-1 plan
    		SELL$54K
    5,257 sh
    		Sep 17, 2026Sep 17, 2026
    traded Sep 17, 2026
    		+0dSEC FORM 4

    Evidence

    0
    KJ
    Kenneweg JohnSVP, Sales & Product Marketing
    MASS908 Devices Inc.
    Option exercise · 10b5-1 plan
    		M—
    1,000 sh
    		Sep 15, 2026Sep 17, 2026
    traded Sep 15, 2026
    		+2dSEC FORM 4

    Evidence

    0
    KJ
    Kenneweg JohnSVP, Sales & Product Marketing
    MASS908 Devices Inc.
    Option exercise · 10b5-1 plan
    		M$5,047
    5,257 sh
    		Sep 17, 2026Sep 17, 2026
    traded Sep 17, 2026
    		+0dSEC FORM 4

    Evidence

    17
    KJ
    Kenneweg JohnSVP, Sales & Product Marketing
    MASS908 Devices Inc.
    Open-market sale · 10b5-1 plan
    		SELL$216K
    21.4K sh
    		Sep 16, 2026Sep 17, 2026
    traded Sep 16, 2026
    		+1dSEC FORM 4

    Evidence

    0
    KJ
    Kenneweg JohnSVP, Sales & Product Marketing
    MASS908 Devices Inc.
    Option exercise · 10b5-1 plan
    		M—
    5,257 sh
    		Sep 17, 2026Sep 17, 2026
    traded Sep 17, 2026
    		+0dSEC FORM 4

    Evidence

    0
    KJ
    Kenneweg JohnSVP, Sales & Product Marketing
    MASS908 Devices Inc.
    Option exercise · 10b5-1 plan
    		M—
    21.4K sh
    		Sep 16, 2026Sep 17, 2026
    traded Sep 16, 2026
    		+1dSEC FORM 4

    Evidence

    9
    BD
    Brown Christopher D.Director
    MASS908 Devices Inc.
    Open-market sale · 10b5-1 plan
    		SELL$317K
    30.0K sh
    		Sep 2, 2026Sep 4, 2026
    traded Sep 2, 2026
    		+2dSEC FORM 4

    Evidence

    6
    KJ
    Knopp Kevin J.Director, President and CEO
    MASS908 Devices Inc.
    Open-market sale · 10b5-1 plan
    		SELL$207K
    20.0K sh
    		Aug 17, 2026Aug 17, 2026
    traded Aug 17, 2026
    		+0dSEC FORM 4

    Evidence

    6
    KJ
    Knopp Kevin J.Director, President and CEO
    MASS908 Devices Inc.
    Open-market sale · 10b5-1 plan
    		SELL$77K
    7,622 sh
    		Aug 13, 2026Aug 17, 2026
    traded Aug 13, 2026
    		+4dSEC FORM 4

    Evidence

    6
    KJ
    Knopp Kevin J.Director, President and CEO
    MASS908 Devices Inc.
    Open-market sale · 10b5-1 plan
    		SELL$3,153
    348 sh
    		Aug 10, 2026Aug 12, 2026
    traded Aug 10, 2026
    		+2dSEC FORM 4

    Evidence

    3
    KJ
    Knopp Kevin J.Director, President and CEO
    MASS908 Devices Inc.
    Open-market sale · 10b5-1 plan
    		SELL$28K
    2,747 sh
    		Aug 12, 2026Aug 12, 2026
    traded Aug 12, 2026
    		+0dSEC FORM 4

    Evidence

    16
    KJ
    Knopp Kevin J.Director, President and CEO
    MASS908 Devices Inc.
    Open-market sale · 10b5-1 plan
    		SELL$1.14M
    115.7K sh
    		Aug 11, 2026Aug 12, 2026
    traded Aug 11, 2026
    		+1dSEC FORM 4

    Evidence

    6
    BD
    Brown Christopher D.Director
    MASS908 Devices Inc.
    Open-market sale · 10b5-1 plan
    		SELL$85K
    9,442 sh
    		Aug 10, 2026Aug 12, 2026
    traded Aug 10, 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
    0002115341-26-000012
    Machine-readable
    Structured copy

    Timestamps

    Event (reported)
    Apr 10, 2026
    Published
    Apr 14, 2026
    Ingested by INSIDER
    Nov 5, 04:04 UTC
    Last re-read
    Nov 5, 04:04 UTC

    Extracted facts

    Filer
    McCallion Kevin J.
    Role
    SVP, Products and Production
    Transaction
    Option exerciseAs filed: “M”
    Asset
    908 Devices Inc. — Stock Option (right to buy)
    Ticker
    MASS
    Shares
    2,693
    Price per share
    $0
    Execution date (reported)
    Apr 10, 2026
    Owned after transaction
    0 shares
    Rule 10b5-1 plan
    Yes, as checked by the filer
    Days from execution to publication
    4

    What this establishes

    McCallion Kevin J. filed this Form 4 reporting a option exercise of MASS on Apr 10, 2026. It became public on Apr 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
    SVP, Products and Production
    McCallion Kevin J.cik:0002115341
    Issuer
    908 Devices Inc.cik:0001555279

    Revision history · 0

    No field has changed since this record was first ingested.

    Company events

    No records

    No material filings recorded for this issuer.