MASS Stock: Insider Activity, Filings & Research

908 Devices Inc. (MASS)Drillr’s hub for MASS insider activity, SEC filings, earnings signals and AI research. Over the trailing 3 months, MASS insiders filed 0 open-market buys and 19 sales (SEC Form 4).

MASS insider trading activity (SEC Form 4)

Sentiment
0/100
Buys (3m)
0
Sells (3m)
19
Net (3m)
-$3.4M
Insider trades by month Buys Sells
Sep
Oct
Feb
Mar
Apr
May
Context3-month price +28.5%Institutions mixed (13F)
DateInsiderTypeSharesPrice
May 29, 2026AWM Investment Company, Inc.10 percent ownerSell170,442$8.66
May 29, 2026Brown Christopher D.directorSell30,000$9.00
May 29, 2026AWM Investment Company, Inc.10 percent ownerSell1,500$8.25
May 29, 2026Griffith Joseph H. IVofficer: Chief Financial OfficerSell6,940$9.03
May 29, 2026AWM Investment Company, Inc.10 percent ownerSell15,000$8.25
May 13, 2026AWM Investment Company, Inc.10 percent ownerSell5,000$8.25
May 11, 2026Kenneweg Johnofficer: SVP, Sales & Product MarketingSell18,255$8.11
May 8, 2026AWM Investment Company, Inc.10 percent ownerSell5,000$8.00
May 8, 2026AWM Investment Company, Inc.10 percent ownerSell57,365$8.06
May 8, 2026AWM Investment Company, Inc.10 percent ownerSell3,025$8.20
May 8, 2026AWM Investment Company, Inc.10 percent ownerSell12,819$8.20
May 7, 2026Brown Christopher D.directorSell20,000$7.23
May 4, 2026Kenneweg Johnofficer: SVP, Sales & Product MarketingSell7,787$6.83
May 4, 2026Kenneweg Johnofficer: SVP, Sales & Product MarketingOption26,042
Apr 29, 2026Kenneweg Johnofficer: SVP, Sales & Product MarketingGrant26,042

Source: MASS SEC Form 4 filings, latest May 29, 2026. For informational purposes only — not investment advice.

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