Item 5. Other Information

Insider Trading Arrangements

During the quarter ended October 3, 2025, the following director adopted a trading arrangement for the purchase or sale of securities of Western Digital that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) of the Exchange Act (“Rule 10b5-1 Plan”):

• Martin I. Cole, a director of the Company, adopted a Rule 10b5-1 Plan on August 1, 2025. Under this plan, up to an aggregate of 22,000 shares of the Company’s common stock may be sold before the plan expires on October 30, 2026.