Western Digital Corporation

Western Digital Corporation is an American data storage company that designs, manufactures, and sells hard disk drives for cloud data centers, client computing devices, and consumer storage applications, generating $11.8 billion in trailing-twelve-month revenue through the third quarter of fiscal 2026. Headquartered in San Jose, California, and founded in 1970, the company completed the separation of its Flash memory business into Sandisk Corporation in February 2025, emerging as a focused pure-play HDD manufacturer at the moment the AI-driven data economy began demanding hard drives at a scale and pace the industry has never seen before.

This is a story about a fifty-year-old company that shed half its business into the worst NAND downturn in a decade, only to find itself the beneficiary of the largest structural demand shift in data storage history. The AI buildout — training, inference, agentic AI, and the emerging physical AI data loop — all converge on one immutable fact: data created must be stored, and the cheapest, most reliable way to store exabytes at scale is a hard disk drive. Western Digital, alongside Seagate, is one of two companies that can deliver those drives at the volumes hyperscalers require. The file turns on a single question: how durable is the demand super-cycle, and what does the market already discount about its ending?