Irving Tan - 03 Mar 2026 Form 4 Insider Report for WESTERN DIGITAL CORP (WDC)

Role: Chief Executive Officer, Director
Signature: By: /s/ Sandra Garcia Attorney-in-Fact For: Irving Tan
Issuer symbol: WDC
Transactions as of: 03 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 05 Mar 2026, 19:54:58 UTC
Previous filing: 27 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Tan Irving	Chief Executive Officer, Director	C/O WESTERN DIGITAL CORPORATION, 5601 GREAT OAKS PARKWAY, SAN JOSE	By: /s/ Sandra Garcia Attorney-in-Fact For: Irving Tan	05 Mar 2026	0001729518

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	WDC	Common Stock	Options Exercise		+92	+0.01%	$0.000000^*	622,655	03 Mar 2026	Direct	F1
transaction	WDC	Common Stock	Tax liability		-3,512	-0.56%	$250.61^*	619,143	03 Mar 2026	Direct	F2

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	Options Exercise		-93	-9.6%	$0.000000^*	876	03 Mar 2026	Common Stock	93		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 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.
F2	Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).