13F Pro

SEC Form 4 reporting owner

Knopp Kevin J.

Knopp Kevin J. has filed 18 Form 4 transactions reported between February 1, 2026 and August 17, 2026, as President and CEO of 908 Devices Inc..

Name as filed: Knopp Kevin J.

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$2.6M
12 lines
Companies
1
with Form 4 filings
Latest transaction
Aug 17, 2026
transaction date

Roles and reported holdings

  • MASS908 Devices Inc.
    Feb 1, 2026 – Aug 17, 2026

    President and CEO

    Held directly555,968 sh as of Aug 17, 2026 · Form 4

    24 months: $2.6M sold

Transaction history

All 18 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Aug 17, 2026MASSPresident and CEOOpen-market saleCode S · direct20,000$207K@ $10.35Form 4
Aug 13, 2026MASSPresident and CEOOpen-market saleCode S · direct7,622$77K@ $10.06Form 4
Aug 12, 2026MASSPresident and CEOOpen-market saleCode S · direct2,747$28K@ $10.07Form 4
Aug 11, 2026MASSPresident and CEOOpen-market saleCode S · direct30,170$307K@ $10.16Form 4
Aug 11, 2026MASSPresident and CEOOpen-market saleCode S · direct115,748$1.1M@ $9.83Form 4
Aug 10, 2026MASSPresident and CEOOpen-market saleCode S · direct348$3K@ $9.06Form 4
Jul 2, 2026MASSPresident and CEOOpen-market saleCode S · direct222$2K@ $9.07Form 4
Jun 26, 2026MASSPresident and CEOOpen-market saleCode S · direct2,798$25K@ $9.09Form 4
Jun 25, 2026MASSPresident and CEOOpen-market saleCode S · direct16,388$149K@ $9.10Form 4
Jun 24, 2026MASSPresident and CEOOpen-market saleCode S · direct40,535$370K@ $9.14Form 4
Jun 23, 2026MASSPresident and CEOOpen-market saleCode S · direct3,422$31K@ $9.06Form 4
Feb 2, 2026MASSPresident and CEOGrant or awardCode A · direct90,043—Form 4
Feb 2, 2026MASSPresident and CEOGrant or awardCode A · direct205,978—Form 4
Feb 2, 2026MASSPresident and CEOOpen-market saleCode S · direct34,764$215K@ $6.18Form 4
Feb 1, 2026MASSPresident and CEOOption exerciseCode M · direct66,288—Form 4
Feb 1, 2026MASSPresident and CEOOption exerciseCode M · direct17,007—Form 4
Feb 1, 2026MASSPresident and CEOOption exerciseCode M · direct13,449—Form 4
Feb 1, 2026MASSPresident and CEOOption exerciseCode M · direct11,255—Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.