OpenAI OpCo, LLC is a Delaware limited liability company with its principal place of business at 3180 18th Street, San Francisco, California. It is an operating subsidiary inside the OpenAI corporate group: corporate disclosure statements filed in federal litigation state that OpenAI OpCo, LLC (formerly OpenAI LP) is a subsidiary of OpenAI Global, LLC, which sits under OAI Corporation, itself a subsidiary of OpenAI Group PBC — the for-profit public benefit corporation created in the October 28, 2025 recapitalization. The nonprofit OpenAI Foundation controls OpenAI Group PBC by appointing its board. OpenAI was founded in 2015. The company is private (no ticker), though it has filed a confidential draft S-1; reporting cited post-March-2026 valuation figures around $852 billion. Employee count was not verified in the sources reviewed.
Operations. OpenAI OpCo is the group's product-facing entity and holds assets such as the "ChatGPT" trademark application. Its offerings include the ChatGPT assistant (consumer subscription tiers and business/enterprise editions) and related features such as Memory, Search, Deep Research, Projects and Shopping Research, plus the OpenAI API platform with model access, vector stores and file search, alongside image and video generation tools. Revenue is reported in the tens of billions of dollars annually.
Litigation posture. This is a classic operating-company-defendant profile: 1 tracked case, 0 as plaintiff, 1 as defendant. It is being sued, not asserting patents. The single tracked matter is venued in the plaintiff-friendly U.S. District Court for the Eastern District of Texas, Marshall Division.
Notable case. Many Worlds 2T Innovations LLC v. OpenAI OpCo, LLC, No. 2:26-cv-00774 (E.D. Tex., filed Aug. 31, 2026, assigned to Judge Rodney Gilstrap), alleges infringement of five patents (U.S. Nos. 8,676,742; 8,843,433; 10,699,202; 12,307,388; 12,299,603) covering personalized search, vector retrieval, recommendation and probabilistic content generation, targeting ChatGPT features and OpenAI vector-search tooling. The complaint seeks royalties, enhanced damages for willful infringement and an injunction. Many Worlds 2T Innovations appears to be a patent-holding plaintiff with no operating products identified; that characterization was not independently verified here. These are allegations only.