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WDCWestern Digital

Matthew Massengill

Director at Western Digital, as of Sep 21, 2026Sold $9.6M of stock in the past 12 months: 100% under a disclosed plan.

Updated Oct 15, 2026 from SEC filings · covers Oct 16, 2025 to Oct 15, 2026
21K
shares held after the latest filing, Western Digital
Vested shares reported on Forms 3, 4 and 5 only. Not the insider's whole wealth.
37K
shares sold, past 12 months
1
days with sales
$9.6M
largest single day, Feb 5, 2026
2
companies filed for

Share of stake sold at Western Digital is not shown: most of their shares vested during the period, so a percentage would mislead. Why

Selling by month

Oct 2025 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.

Disclosed planOne dollar scale for every month; the tallest bar is labeled
OctNovDecJanFeb 2026: $9.6M under a disclosed plan$9.6MFebMarAprMayJunJulAugSepOct

Pattern

What the filings show, past 12 months. Nothing here rates or predicts.

Roles from filings

Every company we track where this person has filed, newest filing first.

CompanyTitleFirst filingLatest filing
Western Digital (WDC)DirectorSep 23, 2003Sep 21, 2026
Sandisk (SNDK)Former DirectorMar 4, 2025Mar 4, 2025

Also a director at

Sandisk (SNDK) (no filing in the last 18 months)

Recent filings

The last 2 days with transactions, newest first, one line per trade date. Each number links to an SEC filing.

This page shows only what this person reported on SEC ownership filings. See the methodology. Spotted something wrong? Report an error.