Core Insights - Western Digital Corporation (WDC) reported strong financial performance in Q4 fiscal 2025, with non-GAAP earnings of $1.66 per share, exceeding estimates by 12.2% and up from $1.44 in the prior year [1] - The company’s quarterly revenues reached $2.61 billion, a 30% increase year over year, driven by demand for high-capacity storage solutions [2] - For fiscal 2025, revenues surged 51% year over year to $9.5 billion, with significant growth in shipments of high-capacity drives [3] Financial Performance - WDC's Q4 revenues from the Cloud end market, which constitutes 90% of total revenues, increased by 36% year over year to $2.6 billion [5] - Non-GAAP gross margin improved to 41.3%, up 610 basis points year over year, attributed to a shift towards higher-capacity drives and effective cost control [6] - Non-GAAP operating income rose 147% year over year to $732 million, while operating expenses decreased by 16% to $345 million [9] Market Dynamics - The demand for high-capacity storage is being driven by cloud computing and generative AI, which require extensive and cost-effective storage solutions [2] - WDC shipped 190 exabytes of storage in Q4, marking a 32% increase year over year, with nearline drives and 26TB CMR and 32TB UltraSMR products seeing significant demand [3][8] Strategic Developments - On February 21, 2025, WDC split its HDD and Flash businesses into two separate public companies, with the new SanDisk focusing on Flash and AI growth [4] - The company repurchased $149 million in stock during the quarter and authorized up to $2 billion in buybacks, reflecting strong cash flow [11] Future Outlook - For Q1 fiscal 2026, WDC anticipates non-GAAP revenues of $2.7 billion, a 22% year-over-year increase, and non-GAAP earnings of $1.54 per share [12][13]

Higher mass capacity revenues were driven by stronger nearline cloud demand. Mass capacity revenues surged 40% year over year to $2 billion. In the June quarter, nearline drives accounted for 91% of the total mass capacity exabytes shipped. Nearline shipments to cloud and edge data centers comprised most of the mass capacity volume. In addition to strong demand from cloud providers, nearline sales to enterprise and OEM customers saw slight quarter-over- quarter growth, and demand is expected to remain stead ...