Matthew E. Massengill
Matthew E. Massengill: Director at Western Digital. What Matthew E. Massengill holds in an AI or semiconductor company tracked on Silicon Floor, from their SEC filings, broken down: the shares held and how, then any restricted shares, options or other rights declared.
Western Digital (WDC)
Matthew E. Massengill holds 29,397 Western Digital shares (0.01% of the company), worth about $11.4M at the last price, according to the Form 4 of Feb 5, 2026.
- Shares held: 28,897 (0.01%), $11.2M — Held in their own name.
- Shares held: 500 (0.00%), $194,510.00 — Held through companies or funds.
Declarations
- Western Digital (WDC) — Form 4 of Sep 17, 2026 0001266824-26-000208
- Western Digital (WDC) — Form 4 of Jun 17, 2026 0001266824-26-000152
- Western Digital (WDC) — Form 4 of Mar 18, 2026 0001266824-26-000064
- Western Digital (WDC) — Form 4 of Feb 5, 2026: open-market sale of 2,600 at $256.63; open-market sale of 4,411 at $257.69; 29,397 shares after 0001266824-26-000008
- Western Digital (WDC) — Form 4 of Dec 18, 2025 0001266824-25-000287
- Western Digital (WDC) — Form 4 of Nov 20, 2025: grant or award of 1,585; 66,323 shares after 0001266824-25-000230
- Western Digital (WDC) — Form 4 of Sep 18, 2025 0001266824-25-000203
- Western Digital (WDC) — Form 4 of Jun 18, 2025 0001266824-25-000121
- Sandisk (SNDK) — Form 4 of Mar 3, 2025: grant or award of 4,840; 17,314 shares after 0001363249-25-000021
- Sandisk (SNDK) — Form 3 of Jan 31, 2025; 0 shares after 0001363249-25-000003
- Western Digital (WDC) — Form 4 of Nov 20, 2024: grant or award of 4,542; 56,230 shares after 0001266824-24-000119
Sources: SEC Schedules 13D and 13G (stakes above 5%, which count everything a person votes or can acquire within 60 days) and Forms 3, 4 and 5 (the shares a director, officer or 10% owner holds, filed within two business days of each trade). Values at the last price.
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