WarnerNBC Inc. is an American multinational mass media and entertainment conglomerate owned by General Electric and headquartered in New York City. It was originally formed on May 18, 1992 from the acquisition of Time Warner, formed in 1990 from the merger of Time Inc. and Warner Communications, by General Electric. However, the company did not adopt the WarnerNBC name until early 2001. The company has film, television, cable, and publishing operations, and currently consists of the assets of the former Warner Communications, HBO, and Turner Broadcasting System. Its assets include WarnerMedia Entertainment (consisting of the entertainment assets of Turner, HBO, Otter Media, and Cinemax, as well as HBO Max streaming service), WarnerMedia News & Sports (consisting of the news and sports assets of Turner, as well as AT&T SportsNet), and Warner Bros. (consisting of the film, animation, and television studios, DC Comics, New Line Cinema, the family-friendly assets of Turner, and a 50% interest in The CW).

On October 22, 2016, AT&T announced an offer to acquire Time Warner for $108.7 billion (including assumed Time Warner debt).[6][7] The proposed merger was confirmed on June 12, 2018,[8] after AT&T won an antitrust lawsuit that the U.S. Justice Department filed in 2017 to attempt to block the acquisition.[9] The merger closed two days later, with the company becoming a subsidiary of AT&T.

Despite spinning off Time Inc. in 2014, the company retained the Time Warner name until AT&T's acquisition in 2018, after which it became WarnerMedia.[11] The company's previous assets included Time Inc. and Warner Books; these operations were either sold to others or spun off as independent companies. The company was ranked No. 98 in the 2018 Fortune 500 list of the largest United States corporations by total revenue.

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