WESTERN DIGITAL CORP — Director's Dealing 2025

Dec 3, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTERN DIGITAL CORP (WDC)
CIK: 0000106040
Period of Report: 2025-12-01

Reporting Person: Cole Martin I (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-12-01	Common Stock	S	100	$157.5	Disposed	41333	Direct
2025-12-01	Common Stock	S	500	$158.9787	Disposed	40833	Direct
2025-12-01	Common Stock	S	600	$159.8867	Disposed	40233	Direct
2025-12-01	Common Stock	S	900	$161.1691	Disposed	39333	Direct
2025-12-01	Common Stock	S	400	$162.1175	Disposed	38933	Direct
2025-12-01	Common Stock	S	451	$163.1648	Disposed	38482	Direct
2025-12-01	Common Stock	S	2539	$164.2035	Disposed	35943	Direct
2025-12-01	Common Stock	S	510	$164.952	Disposed	35433	Direct

Footnotes

F1: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 1, 2025.

F2: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $158.55 to a high of $159.52. 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.

F3: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $159.56 to a high of $160.15. 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.

F4: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $160.67 to a high of $161.63. 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.

F5: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $161.67 to a high of $162.65. 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.

F6: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $162.74 to a high of $163.73. 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.

F7: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $163.75 to a high of $164.72. 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.

F8: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $164.79 to a high of $165.10. 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.