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MASS insider trading

908 Devices Inc. — open-market insider buys and $1M+ sells from SEC Forms 3, 4 and 5.
Insider buys · 24 mo
3
Bought · 24 mo
$174k
Buys · last 90 days
0 · $0
Most recent buy
2025-05-19

Recent insider filings

FiledInsiderTypeSharesPriceValue
2026-08-12Knopp Kevin J.
President and CEO
Sold115,748$9.83$1.1M
2026-05-29AWM Investment Company, Inc.
10% owner
Sold170,442$8.66$1.5M
2025-05-19Knopp Kevin J.
President and CEO
Bought15,000$4.44$67k
2025-05-15Spoto Mark
Director
Bought10,000$4.29$43k
2025-05-14Knopp Kevin J.
President and CEO
Bought15,000$4.32$65k

Most active insider buyers

InsiderRoleBuysTotal bought
Knopp Kevin J.President and CEO2$131k
Spoto MarkDirector1$43k

See MASS on the chart

Every insider buy and sell for MASS plotted on the price, the full two-year history, cluster scores and daily updates — in the members area, $29/month. A free quarterly sample of the whole dataset needs no account.

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Data from the SEC EDGAR ownership filings, refreshed daily. Only open-market purchases (transaction code P) and sales of $1M or more are shown; grants, option exercises and tax withholding are excluded because they run on schedules set years earlier. Not investment advice.