SEC Form 4 · accession 0001266824-26-000166

WESTERN DIGITAL CORP · WDC

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

Reporting owner

Irving Tan

Officer — Chief Executive Officer · Director

Period of report

Aug 11, 2026

Accepted (ET)

Aug 12, 2026 · 9:24 pm EDT

Rule 10b5-1 plan

yes — trade under a plan

Issuer CIK

0000106040

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I
Common Stock^F2	Aug 11, 2026	S	2,478	$441.4838	D	593,488	D
Common Stock^F3	Aug 11, 2026	S	989	$442.2155	D	592,499	D
Common Stock^F4	Aug 11, 2026	S	1,840	$443.3465	D	590,659	D
Common Stock^F5	Aug 11, 2026	S	1,880	$444.6745	D	588,779	D
Common Stock^F6	Aug 11, 2026	S	4,822	$445.4508	D	583,957	D
Common Stock^F7	Aug 11, 2026	S	6,445	$446.3812	D	577,512	D
Common Stock^F8	Aug 11, 2026	S	1,546	$447.1831	D	575,966	D

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 5, 2026.
F2Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $440.77 to a high of $441.66. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F3Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $441.94 to a high of $442.73. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F4Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $443.00 to a high of $443.91. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F5Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $444.00 to a high of $444.94. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F6Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $445.00 to a high of $445.99. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F7Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $446.00 to a high of $446.99. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F8Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $447.00 to a high of $447.88. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.