Defendant
1 case as defendant.
AT&T Enterprises, LLC is a wholly-owned subsidiary of AT&T Inc., an American multinational telecommunications company headquartered in Dallas, Texas. While the legal entity AT&T Enterprises, LLC was formed in May 2024 through an internal corporate restructuring, it is the successor in interest to AT&T Corp., which traces its origins back to the American Telephone and Telegraph Company founded in 1885. Its parent company, AT&T Inc., is publicly traded on the New York Stock Exchange under the ticker symbol "T", with a market capitalization of $186.83 billion and an estimated 149,900 employees as of December 31, 2025.
AT&T Enterprises, LLC provides a broad range of telecommunications services, having assumed the services previously offered by AT&T Corp. These offerings include local and long-distance telephone services, wireless voice and data networks, broadband internet access (DSL and fiber), and various internet communication and web management services. It also offers carrier and internet backbone services, business and residential broadband, and private network services.
The company's patent litigation posture is that of an operating company defending against assertions. AT&T Enterprises, LLC has one tracked case as a defendant and no cases as a plaintiff. This single case, Headwater Research LLC v. AT&T Services, Inc. et al., is filed in the Eastern District of Texas, a venue known for its patent litigation activity.
The notable tracked case, Headwater Research LLC v. AT&T Services, Inc. et al., commenced on July 11, 2025. The plaintiff, Headwater Research LLC, has been identified as a Non-Practicing Entity (NPE) in other litigation and has a history of asserting patent portfolios against major telecommunications and mobile device companies, securing significant verdicts against entities like Verizon and Samsung. The formation of AT&T Enterprises, LLC itself was part of a strategic internal reorganization by AT&T Inc. to streamline its corporate structure by converting certain subsidiaries from corporations to limited liability companies, aiming for greater operational efficiencies.
Headwater Research LLC filed a patent infringement suit against AT&T Services, Inc., AT&T Enterprises, LLC, and AT&T Mobility LLC in the Eastern District of Texas on July 11, 2025. The case status implies it was recently filed.