David Beerman Editor Editor David Beerman WarnerMedia Warner Media, LLC is an American multinational mass media and entertainment conglomerate corporation owned by AT&T and headquartered in New York City , United States . It was originally formed in 1990 by Steve Ross and formerly known as Time Warner from 1990 to 2001 and 2003 to 2018, from the merger of Time Inc. and the original Warner Communications. The company has film, television and cable operations, with its assets including WarnerMedia Studios & Networks (consisting of the entertainment and family-friendly assets of Turner Broadcasting , HBO , and Cinemax as well as Warner Bros. , which itself consists of the film, animation, and television studios DC Comics , New Line Cinema , and, together with ViacomCBS , a 50% interest in The CW television network); WarnerMedia News & Sports (consisting of the news and sports assets of Turner Broadcasting, as well as AT&T SportsNet ); WarnerMedia Commercial (...