SEC Form 4 reporting owner

Brown Christopher D.

Brown Christopher D. has filed 17 Form 4 transactions reported between February 1, 2026 and September 2, 2026, as a reporting owner of 908 Devices Inc..

Name as filed: Brown Christopher D.

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$1.8M
14 lines
Companies
1
with Form 4 filings
Latest transaction
Sep 2, 2026
transaction date

Roles and reported holdings

  • MASS908 Devices Inc.
    Feb 1, 2026 – Sep 2, 2026

    Reporting owner

    Held directly775,559 sh as of Sep 2, 2026 · Form 4

    24 months: $1.8M sold

Transaction history

All 17 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Sep 2, 2026MASSOpen-market saleCode S · direct30,000$317K@ $10.58Form 4
Aug 11, 2026MASSOpen-market saleCode S · direct8,358$77K@ $9.23Form 4
Aug 10, 2026MASSOpen-market saleCode S · direct9,442$85K@ $9.03Form 4
Aug 5, 2026MASSOpen-market saleCode S · direct20,000$170K@ $8.49Form 4
Jul 2, 2026MASSOpen-market saleCode S · direct2,200$20K@ $9.02Form 4
Jun 30, 2026MASSOpen-market saleCode S · direct20,000$177K@ $8.84Form 4
Jun 23, 2026MASSOpen-market saleCode S · direct9,900$89K@ $9.04Form 4
Jun 4, 2026MASSOpen-market saleCode S · direct100$900@ $9.00Form 4
Jun 3, 2026MASSOpen-market saleCode S · direct20,000$175K@ $8.73Form 4
May 28, 2026MASSOpen-market saleCode S · direct30,000$270K@ $9.00Form 4
May 6, 2026MASSOpen-market saleCode S · direct20,000$145K@ $7.23Form 4
Apr 10, 2026MASSOpen-market saleCode S · direct17,578$124K@ $7.07Form 4
Apr 9, 2026MASSOpen-market saleCode S · direct7,392$52K@ $7.04Form 4
Apr 8, 2026MASSOpen-market saleCode S · direct15,030$106K@ $7.05Form 4
Feb 1, 2026MASSOption exerciseCode M · direct10,992—Form 4
Feb 1, 2026MASSOption exerciseCode M · direct7,418—Form 4
Feb 1, 2026MASSOption exerciseCode M · direct5,027—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.