Western Digital’s AI-driven HDD duopoly is operationally exceptional, but at $548.56 the stock is priced for near-perfect execution and substantial multiple support.
Overview
Western Digital has transformed from a dual-technology storage conglomerate into a pure-play enterprise HDD supplier after completing the SanDisk spin-off on February 21, 2025. Approximately 89% of late-FY26 revenue came from Cloud, versus 5% from Client and 6% from Consumer, aligning the business with hyperscale data-center capacity demand. **The core investment case is that AI-driven data creation and HDD economics remain structurally attractive:** magnetic storage offers lower capital cost per terabyte and superior total cost of ownership for warm and cold data than flash. WDC’s 2026 capacity is 100% pre-sold, while LTAs extend commitments through 2028. Q4 FY26 revenue rose 43.8% year over year to $3.747 billion, non-GAAP gross margin reached 54.4%, non-GAAP operating margin reached 44.2%, and non-GAAP diluted EPS was $3.56. FY26 revenue was $12.919 billion and free cash flow was $3.511 billion. Management guided Q1 FY27 revenue to $4.1 billion plus or minus $100 million, gross margin to 55.0%–56.0%, and EPS to $4.00 plus or minus $0.15. However, after a 176% year-to-date rally, the stock trades near multi-year highs and approximately 29.8x trailing earnings. The report therefore views the business positively but the shares as fully valued, with multiple compression the principal near-term risk.