Q3FY26 Highlights: •Revenue of$3.34 billion, up45%year-over-year•GAAP gross margin of50.2%; non-GAAP gross margin of50.5%•GAAP diluted EPS of$8.20; non-GAAP diluted EPS of$2.72•Cash flow from operations of$1.12 billion; free cash flow of$978 million•Q4FY26 revenue expected to be up36% to 44%year-over-year•Q4FY26 non-GAAP gross margin expected to be in the range of51% to 52% SAN JOSE, Calif.—April30, 2026—Western Digital Corporation (Nasdaq: WDC) today reported fiscalthird quarter 2026 financial results for the period endedApril3, 2026. “WD started calendar year 2026 with great execution, driving strong sequential and year-over-year revenue growth inall our end markets, while expanding gross and operating margins. Gross margin exceeded 50%, reflecting ourcontinued delivery of innovationacross an expanding set of customers. Given our confidence in the durability of ourbusiness, we are also announcing a 20% increase in the quarterly cash dividend on the company’s common stock to$0.15 per share,” said Irving Tan, CEO of WD. “The demand drivers are clear: Virtually every AI workload, fromtraining, inference, agentic AI to physical AI, creates data that is stored persistently and cost-efficiently on HDDs.” Q3FY26Financial Highlights ($ in millions, except per share amounts) Business Outlook for FiscalFourthQuarter of 2026 “Our business continues to strengthen with visibility extending as we continue to build momentum across all our endmarkets, driven by innovation, strongcustomer engagements, and disciplined execution. We have also strengthenedour balance sheet while deploying our robust free cash flow to drive shareholder returns,” said Kris Sennesael, CFOof WD. “For our fiscal fourth quarter of 2026, at the mid-point of the ranges provided in the table below, we expectrevenues of $3.65 billion, non-GAAP gross margin of 51.5%, with non-GAAP EPS of $3.25.” (1)Weprovide earnings guidance only on a non-GAAP basis because certain information necessary to reconcile such guidanceto GAAP is difficult to estimate or cannot be allocated or quantified with certainty and is dependent on future events outsideof our control. Please refer to the section titled “Non-GAAP Guidance” under “Discussion Regarding the Use of Non-GAAPFinancial Measures” inthis press release for additional information regarding the non-GAAP measures,includingquantification of known expected adjustment items. Dividend WD’s Board of Directors declared a cash dividend of $0.15 per share of the company’s common stock, which will bepaid on June 17, 2026 to stockholders of record as of the close of business on June 5, 2026. WD’s Fiscal Third Quarter 2026 Conference Call WD will host a conference call to discuss its fiscal third quarter 2026 results and business outlook for the fiscal fourthquarter of 2026 today at 1:30 p.m. Pacific / 4:30 p.m. Eastern. The live and archived conference call and the earningspresentation can be accessed online atinvestor.wdc.com. About WD WD, also known as Western Digital, builds the storage infrastructure that powers certainty in the AI-driven dataeconomy. At the forefront of innovation, WD partners with the world’s leading hyperscalers, cloud service providers,and enterprises to enablereliable storage solutions that are proven and trusted at scale. Driven by a culture ofinnovation and execution, WD helps customers store, protect, and use the world’s data with confidence. Follow WDon LinkedIn and learn more at www.wd.com. Basis of Presentation On February 21, 2025 (the “Separation Date”), Western Digital Corporation (“WDC”) completed the previouslyannounced separation (the “Separation”) of its Flash business unit into a separate company, Sandisk Corporation(“Sandisk”). The financial and operating results of Sandisk subsequent to the Separation Date are no longer consolidated intoWDC’s financial and operating results. For all periods prior to the Separation Date, the historical results of WDC arereflected on a continuing operations basis with the historical results of Sandisk for such periods reflected asdiscontinued operations in WDC’s financial highlights and condensed consolidated statements of operations includedin this release. Forward-Looking Statements This press release contains forward-looking statements within the meaning of federal securities laws, includingstatements regarding expectations for: the company’s business outlook and operational and financial performance forthe fiscalfourthquarter of2026and beyond, and demand and market conditions for our products and growthopportunities. These forward-looking statements are based on management’s current expectations and are subject torisks and uncertainties that could cause actual results to differ materially from those expressed or implied in theforward-looking statements. Key risks and uncertainties that could cause actual results to differ materially from thoseexpressed or implied in the forward-looking statements include: adverse global or regio