WESTERN DIGITAL CORP — Director's Dealing 2026

Feb 4, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTERN DIGITAL CORP (WDC)
CIK: 0000106040
Period of Report: 2026-02-02

Reporting Person: Tan Irving (Director, Chief Executive Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-02	Common Stock	S	981	$242.2291	Disposed	642605	Direct
2026-02-02	Common Stock	S	1298	$243.5023	Disposed	641307	Direct
2026-02-02	Common Stock	S	800	$245.005	Disposed	640507	Direct
2026-02-02	Common Stock	S	1005	$247.2636	Disposed	639502	Direct
2026-02-02	Common Stock	S	1100	$248.9518	Disposed	638402	Direct
2026-02-02	Common Stock	S	200	$249.485	Disposed	638202	Direct
2026-02-02	Common Stock	S	1000	$252.151	Disposed	637202	Direct
2026-02-02	Common Stock	S	100	$253.4	Disposed	637102	Direct
2026-02-02	Common Stock	S	100	$255.0	Disposed	637002	Direct
2026-02-02	Common Stock	S	1000	$256.761	Disposed	636002	Direct
2026-02-02	Common Stock	S	1500	$257.8168	Disposed	634502	Direct
2026-02-02	Common Stock	S	2096	$258.6534	Disposed	632406	Direct
2026-02-02	Common Stock	S	2250	$259.9268	Disposed	630156	Direct
2026-02-02	Common Stock	S	2444	$260.8377	Disposed	627712	Direct
2026-02-02	Common Stock	S	3626	$261.8351	Disposed	624086	Direct
2026-02-02	Common Stock	S	100	$262.55	Disposed	623986	Direct
2026-02-02	Common Stock	S	400	$250.71	Disposed	623586	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 May 12, 2025.

F2: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $242.02 to a high of $242.68. 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 $243.29 to a high of $243.52. 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.

F4: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $244.66 to a high of $245.29. 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 $246.98 to a high of $247.82. 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 $248.24 to a high of $249.16. 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 $249.39 to a high of $249.58. 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 $252.00 to a high of $252.68. 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.

F9: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices
ranging from a low of $256.25 to a high of $257.19. 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.

F10: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices
ranging from a low of $257.29 to a high of $258.20. 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.

F11: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices
ranging from a low of $258.29 to a high of $258.96. 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.

F12: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices
ranging from a low of $259.40 to a high of $260.35. 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.

F13: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $260.45 to a high of $261.37. 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.

F14: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $261.50 to a high of $262.41. 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.

F15: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices
ranging from a low of $250.62 to a high of $250.80. 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.