Gene Zamiska - Sep 18, 2025 Form 4 Insider Report for WESTERN DIGITAL CORP (WDC)

Role: SVP & Princ. Acctg Officer
Signature: By: /s/ Sandra Garcia Attorney-in-Fact For: Gene Zamiska
Stock symbol: WDC
Transactions as of: Sep 18, 2025
Transactions value $: $0
Form type: 4
Date filed: 9/22/2025, 06:26 PM
Previous filing: Aug 28, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Zamiska Gene M.	SVP & Princ. Acctg Officer	C/O WESTERN DIGITAL CORPORATION, 5601 GREAT OAKS PARKWAY, SAN JOSE	By: /s/ Sandra Garcia Attorney-in-Fact For: Gene Zamiska	2025-09-22	0001456385

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	WDC	Dividend Equivalent Rights	Award	$0	+26.1	+56.36%	$0.00	72.5	Sep 18, 2025	Common Stock	26.1		Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The 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.