Sirius XM Holdings Inc. is a leading audio entertainment company that provides satellite radio and online radio services. They generate revenue primarily through subscription fees, advertising, and the sale of radios and accessories. Founded in 1990 and headquartered in New York City, Sirius XM merged with XM Satellite Radio in 2008, creating a dominant force in the satellite radio industry. They offer a wide range of content, including music, sports, talk, and news, catering to diverse audiences.