Item 5. Other Information

Insider Trading Arrangements

During the quarter ended January 2, 2026, the following director or officer (as defined in Rule 16a-1(f) of the Exchange Act) 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”):

• Brian Scott Davis, Executive Vice President and Chief Sales and Marketing Officer of the Company, adopted a Rule 10b5-1 Plan on November 3, 2025. Under this plan, up to an aggregate of 30,000 shares of the Company’s common stock may be sold before the plan expires on August 14, 2026.

• Matthew E. Massengill, a director of the Company, adopted a Rule 10b5-1 Plan on November 6, 2025. Under this plan, up to an aggregate of 36,926 shares of the Company’s common stock may be sold before the plan expires on May 15, 2026.