Microsoft

Microsoft Corporation, commonly known as Microsoft, is an American multinational technology company headquartered in Redmond, Washington, and was founded on April 4, 1975. It is a publicly traded company on Nasdaq under the ticker MSFT. As of July 2026, Microsoft has a market capitalization of approximately $2.95 trillion USD, employs 228,000 people, and reported a trailing 12-month revenue of $318 billion as of March 2026.

Microsoft develops, licenses, and sells a wide range of software, consumer electronics, and services. Its core product lines include the Windows operating systems, the Microsoft Office and Microsoft 365 suite of productivity applications, and the Xbox brand of video game consoles. The company is also a major provider of cloud computing services through Microsoft Azure, enterprise software such as Microsoft Dynamics 365, and internet services like Bing and LinkedIn.

In terms of patent litigation, Microsoft operates primarily as a defendant, frequently defending against patent infringement claims. The company's posture reflects that of an operating company that is often targeted by patent assertion entities, rather than an entity primarily asserting its own patent portfolio. This is consistent with its single tracked case as a defendant and zero as a plaintiff. Microsoft also proactively files Inter Partes Review (IPR) petitions to challenge asserted patents.

The company's single tracked case is Proxense, LLC v. Microsoft, in which Microsoft is the defendant in the Western District of Texas. Microsoft's patent disputes have covered various technologies, including server management code for Azure, back-end software for Skype, Surface Tablet hardware components, and virtual reality technology.