By CapitalSnitch Research Desk · updated Oct 11, 2026 · data from SEC filings and official Congress disclosures
908 Devices Inc. insiders have only been selling lately: six insiders sold about $10 million of stock over 12 months, with no open-market purchases.
Selling on its own is common and often pre-planned (10b5-1 plans, taxes, diversification), so it matters more when it is unusually heavy or broad.
Zooming out by quarter: 7 quarters in a row of net selling by insiders. Insiders bought in 1 of the last 7 full quarters. 112 investment managers listed MASS in their latest 13F filings (Q2 2026); more funds bought than sold.
Are insiders buying or selling MASS stock?
In the last 12 months 908 Devices Inc. insiders made open-market purchases worth about $0 and sales worth about $10 million. Data comes from SEC Form 4 filings, updated every 30 minutes on CapitalSnitch.
When was the last insider trade in MASS?
The most recent open-market insider trade in MASS was filed on 2026-10-09.
How many institutions own MASS?
112 investment managers reported holding MASS in SEC Form 13F filings for Q2 2026.
Has any member of Congress traded MASS?
No congressional trades in MASS were reported in the past two years. The full list is free on CapitalSnitch.
Free weekly email: the week's biggest insider buys and Congress trades, every Monday. No spam, one-click unsubscribe.
Public-record data for research and education, not investment advice. Insider sales are often pre-planned (10b5-1).
Congress data: Data derived from public disclosures filed under the Ethics in Government Act and the STOCK Act, republished free for public transparency and news reporting. Disclosures may lag the trade by 45 days or more and show amounts only as ranges. This data may not be used for credit rating, loan underwriting, solicitation of money (political, charitable or other), direct-mail or commercial targeting (5 U.S.C. 13107).