SEC Form 4 reporting owner

Massengill Matthew E

Massengill Matthew E has filed 14 Form 4 transactions reported between December 18, 2025 and September 17, 2026, as Director of WESTERN DIGITAL CORP.

Name as filed: MASSENGILL MATTHEW E

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$8.9M
10 lines
Companies
1
with Form 4 filings
Latest transaction
Sep 17, 2026
transaction date

Roles and reported holdings

  • WDCWESTERN DIGITAL CORP
    Dec 18, 2025 – Sep 17, 2026

    Director

    Held indirectly (latest line)0 sh as of Feb 5, 2026 · Form 4

    24 months: $8.9M sold

Transaction history

All 14 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Sep 17, 2026WDCDirectorGrant or awardCode A · direct10—Form 4
Jun 17, 2026WDCDirectorGrant or awardCode A · direct6—Form 4
Mar 18, 2026WDCDirectorGrant or awardCode A · direct12—Form 4
Feb 5, 2026WDCDirectorOpen-market saleCode S · indirect400$107K@ $268.06Form 4
Feb 5, 2026WDCDirectorOpen-market saleCode S · indirect916$244K@ $265.92Form 4
Feb 5, 2026WDCDirectorOpen-market saleCode S · indirect2,200$583K@ $264.99Form 4
Feb 5, 2026WDCDirectorOpen-market saleCode S · indirect2,300$604K@ $262.77Form 4
Feb 5, 2026WDCDirectorOpen-market saleCode S · indirect3,597$941K@ $261.71Form 4
Feb 5, 2026WDCDirectorOpen-market saleCode S · indirect5,987$1.6M@ $260.57Form 4
Feb 5, 2026WDCDirectorOpen-market saleCode S · indirect4,915$1.3M@ $259.59Form 4
Feb 5, 2026WDCDirectorOpen-market saleCode S · indirect7,000$1.8M@ $258.67Form 4
Feb 5, 2026WDCDirectorOpen-market saleCode S · indirect4,411$1.1M@ $257.69Form 4
Feb 5, 2026WDCDirectorOpen-market saleCode S · indirect2,600$667K@ $256.63Form 4
Dec 18, 2025WDCDirectorGrant or awardCode A · direct21—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.