Citigroup Inc.

Citigroup Inc. (commonly known as Citi) is a publicly-traded global financial services holding company headquartered in New York, New York. The current company was formed through the 1998 merger of Citicorp and Travelers Group, with predecessor institutions dating back to the founding of the City Bank of New York in 1812. As one of the largest banking institutions in the United States, Citigroup employs approximately 240,000 people. It trades on the New York Stock Exchange under the ticker symbol "C" and reported revenue of approximately $85 billion for the trailing twelve months of 2025. Its market capitalization was over $213 billion as of May 2026.

Citigroup operates as a diversified financial services company providing a broad range of products for consumers, corporations, governments, and institutions. Its major divisions are the Institutional Clients Group and Personal Banking and Wealth Management. Key services include investment and corporate banking, sales and trading, treasury and trade solutions, securities services, retail banking through its Citibank subsidiary, and one of the largest credit card issuing businesses in the U.S. The company also offers wealth management services to a global client base.

Based on the provided data, Citigroup is an operating company that has been a defendant in patent litigation. The company's record of one tracked case as a defendant and zero as a plaintiff is characteristic of a large technology-using enterprise defending itself against patent assertions, rather than initiating patent litigation itself. This defensive posture is common for major financial institutions. The single case was filed in the Eastern District of Texas, a jurisdiction historically favored by patent plaintiffs.

The tracked case, Cyberfone Systems, LLC v. Citigroup Inc., was filed in 2014. The plaintiff, Cyberfone Systems, LLC, was a subsidiary of Marathon Patent Group, a patent licensing and monetization company, and filed infringement lawsuits against a large number of defendants across various industries. In related litigation, the patent asserted by Cyberfone in its broader campaign was ultimately found to be invalid by the courts for claiming an abstract idea.