Gene Zamiska - 18 Sep 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
Issuer symbol: WDC
Transactions as of: 18 Sep 2025
Net transactions value: $0
Form type: 4
Filing time: 22 Sep 2025, 18:26:26 UTC
Previous filing: 28 Aug 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	22 Sep 2025	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	+56%	$0.000000	72	18 Sep 2025	Common Stock	26		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.