MASSENGILL MATTHEW E 4

What Happened

• Matthew E. Massengill, a director of Western Digital Corporation (WDC), sold a total of 36,926 shares on February 5, 2026 in multiple open‑market transactions. The individual trades ranged from 400 to 7,000 shares at prices between $256.12 and $268.53 per share, generating total proceeds of approximately $9,616,466 (about $9.62M). The weighted average sale price across these transactions was roughly $260.43 per share.
• These were sales (not purchases), and they were carried out pursuant to a pre‑existing Rule 10b5‑1 trading plan (adopted November 6, 2025), which typically reflects pre‑scheduled transactions rather than contemporaneous discretionary selling.

Key Details

• Transaction date: February 5, 2026 (Form 4 filed Feb 6, 2026 — timely).
• Total shares sold: 36,926; total proceeds: ~$9.62 million; approximate weighted average price: ~$260.43/share.
• Price range reported across grouped trades: approximately $256.12 (low) to $268.53 (high); footnotes provide per‑group weighted averages and per‑group price ranges.
• Shares owned after the transactions: not specified in the information provided in this summary (not disclosed in the transaction details supplied).
• Notable footnote: F1 — sales were effected pursuant to a Rule 10b5‑1 trading plan adopted 11/06/2025. Several other footnotes (F2–F12) give weighted-average prices and specific intra-group price ranges and state the filer will provide further breakdowns if requested.

Context

• Because these sales were made under a 10b5‑1 plan, they were likely pre‑arranged and do not necessarily indicate the director’s current view of the company; they are routine disclosures of insider sales. Purchases tend to carry more immediate informational weight for investors.