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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 43m ago
HOUSE PTR3m ago
SEC 13F3m ago
ROBINHOOD CHAIN2m ago
SEC FORM 4/Grant or awardVerified data

Otitoju Kolawole A. reported MASS

Chief Bus. & Strategy Officer · 908 Devices Inc. · 908 Devices Inc. — Stock Option (right to buy)

Side
A
Value
—
Shares
146.8K
Price
—
Executed
Apr 21, 2026
Disclosed
Apr 22, 2026
Disclosure timeline1 days from execution to publication · legal deadline 2 business days
Apr 21 executedApr 22, 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
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 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 · MASS

    ScoreActorSecuritySideValueExecutedDisclosedLagSourceEvidence
    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

    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

    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

    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

    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

    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

    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$5,047
    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—
    5,257 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

    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

    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
    BD
    Brown Christopher D.Director
    MASS908 Devices Inc.
    Open-market sale · 10b5-1 plan
    		SELL$77K
    8,358 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

    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

    9
    KJ
    Knopp Kevin J.Director, President and CEO
    MASS908 Devices Inc.
    Open-market sale · 10b5-1 plan
    		SELL$307K
    30.2K sh
    		Aug 11, 2026Aug 12, 2026
    traded Aug 11, 2026
    		+1dSEC 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
    0002127645-26-000004
    Machine-readable
    Structured copy

    Timestamps

    Event (reported)
    Apr 21, 2026
    Published
    Apr 22, 2026
    Ingested by INSIDER
    Nov 5, 04:03 UTC
    Last re-read
    Nov 5, 04:03 UTC

    Extracted facts

    Filer
    Otitoju Kolawole A.
    Role
    Chief Bus. & Strategy Officer
    Transaction
    Grant or awardAs filed: “A”
    Asset
    908 Devices Inc. — Stock Option (right to buy)
    Ticker
    MASS
    Shares
    146.8K
    Price per share
    $0
    Execution date (reported)
    Apr 21, 2026
    Owned after transaction
    146.8K shares
    Days from execution to publication
    1

    What this establishes

    Otitoju Kolawole A. filed this Form 4 reporting a grant or award of MASS on Apr 21, 2026. It became public on Apr 22, 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 Bus. & Strategy Officer
    Otitoju Kolawole A.cik:0002127645
    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.