WESTERN DIGITAL CORP 4

Western Digital Corp. Chief Legal Officer & Corporate Secretary Cynthia L. Tregillis had RSU/dividend-equivalent vesting with tax-share withholding and then sold 432 shares of common stock under a Rule 10b5-1 plan, ending with 116,643 directly held shares.

On June 3, 2026, Western Digital Corp. Chief Legal Officer & Corporate Secretary Cynthia L. Tregillis exercised stock options (coded “M”) for 6 shares of common stock at a reporting price of $0.00, and concurrently 6.6834 dividend equivalent rights were converted into 6.6834 shares of common stock on a one‑for‑one basis in connection with the vesting of related restricted stock units. Also on June 3, 2026, 699 shares of common stock were withheld (coded “F”) at $594.11 per share (approximately $415,000) to satisfy tax obligations arising from the vesting of securities, leaving her with 117,075 directly held shares after that withholding. On June 5, 2026, pursuant to a pre‑arranged Rule 10b5‑1 trading plan adopted on March 6, 2026, she sold 432 shares of common stock at $545.60 per share (approximately $236,000), reducing her direct holdings to 116,643 shares. Her reported holdings also include 611 shares acquired under the company’s Employee Stock Purchase Plan on May 31, 2026. Overall, the Form 4 reflects routine equity vesting and related tax withholding combined with a modest, pre‑planned open‑market sale, leaving Tregillis with a substantial residual equity position in Western Digital.

Filing Facts

CIK

106040

Ticker

WDC

Form

4

Source Type

sec

Accession

0001266824-26-000121

Alert Tier

8