WESTERN DIGITAL CORP 4

Cynthia L. Tregillis, Chief Legal Officer & Corporate Secretary of Western Digital Corp. (WDC), reported RSU/dividend equivalent conversions, tax-withholding sales, and a small Rule 10b5-1 sale totaling 106 common shares sold and over 1,400 shares withheld for taxes, ending with 118,443 shares owned.

On May 20–21, 2026, Western Digital Corp. Chief Legal Officer & Corporate Secretary Cynthia L. Tregillis reported a series of routine equity compensation-related transactions, including the vesting and conversion of restricted stock units and related dividend equivalent rights into common stock, along with share withholdings to cover tax obligations and a small discretionary sale under a pre-established Rule 10b5-1 trading plan. On May 20, 2026, 3 shares were acquired via an option/RSU-related transaction and 3.6301 dividend equivalent rights were converted into 3.6301 common shares, while 379 shares (approximately $174,000) were withheld for taxes at $459.62 per share, leaving 119,647 shares owned. On May 21, 2026, 10 additional shares were acquired from RSU/option activity and 10.5887 dividend equivalent rights were converted into 10.5887 common shares, with 1,108 shares withheld for tax at $486.46 per share (about $539,000) and 106 shares sold at $458.87 per share (about $48,600) under the 10b5-1 plan, resulting in 118,443 common shares held directly. Using the indicated transaction prices as a proxy (roughly $460–$486 per share), her post-transaction common stock holdings are worth on the order of $55–$58 million.

Filing Facts

CIK

106040

Ticker

WDC

Form

4

Source Type

sec

Accession

0001266824-26-000099

Alert Tier

7