SEC Form 4 · accession 0001266824-26-000213

WESTERN DIGITAL CORP · WDC

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Officer — Chief Executive Officer · Director

Period of report

Sep 17, 2026

Accepted (ET)

Sep 21, 2026 · 6:36 pm EDT

Rule 10b5-1 plan

box not checked

Issuer CIK

0000106040

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1	Sep 20, 2026	M	57	$0.00	A	266,704	D
Common Stock^F2	Sep 20, 2026	F	1,091	$441.36	D	265,613	D
Common Stock	holding	—	—		—	112,500	I	By Trust via Inv Co
Common Stock	holding	—	—		—	209,000	I	by Personal Inv. Co.

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Dividend Equivalent Rights^F3	—	Sep 17, 2026	A	83	A	—	—	Common Stock	83	857	D
Dividend Equivalent Rights^F1	—	Sep 20, 2026	M	57	D	—	—	Common Stock	57	800	D

F1The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.
F2Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).
F3The dividend equivalent rights accrued on previously awarded restricted stock units (RSUs) which vest proportionately with the RSUs to which they relate. Each dividend equivalent right represents a contingent right to receive one share of the Issuer's common stock or the cash value thereof.