WESTERN DIGITAL CORP (WDC)

Western Digital, founded in 1970 and headquartered in San Jose, California, is an S&P 500 company and a developer, manufacturer, and provider of data storage devices and solutions based on hard disk drive (HDD) technology. Its HDDs provide reliable, cost-effective, high-capacity storage for cloud data centers, enterprise storage systems, edge computing, smart video, and client and consumer devices. The company sells under the Western Digital and WD brands and holds approximately 4,700 active patents covering data storage and magnetic recording technologies.

Its portfolio is organized around three end markets. Cloud, its largest and fastest growing market, offers high-capacity enterprise HDDs for public and private cloud environments, data centers, and smart video systems. Client provides OEM and channel customers with HDDs for desktops and notebooks, designed for performance, reliability, capacity, low cost per gigabyte, quiet acoustics, and low power consumption. Consumer offers HDD external storage products sold globally through retail and channel partners. Its high-capacity roadmap includes ePMR, OptiNAND, UltraSMR, heat-assisted magnetic recording (HAMR), and triple stage actuators.

Customers include hyperscale cloud service providers, neoclouds, computer manufacturers and OEMs, resellers, distributors, and retailers worldwide, with some long-term agreements. Sales and marketing teams are located across the Americas, Asia Pacific, Europe, and the Middle East. International sales were 60% of net revenue in 2026, 55% in 2025, and 58% in 2024. Three customers accounted for 16%, 15%, and 13% of 2026 net revenue. Demand depends heavily on the buying patterns of large Cloud customers and on industry cyclicality and macroeconomic factors. Products are generally warranted for up to five years.

The company designs and manufactures substantially all of the recording heads and magnetic media in its HDDs, and relies on an external supply base for other components and materials, with some sourced from sole or single source providers. It also uses contract manufacturers when strategically advantageous. Vertically integrated assembly and test operations are in Thailand, Malaysia, the Philippines, China, and California. It employed approximately 40,000 people at the end of 2026, about 88% in Asia Pacific. Competitors include Seagate Technology Holdings plc and Toshiba Electronic Devices & Storage Corporation, as well as NAND flash suppliers and storage systems and solutions providers.