Warner Music Group (WMG), also known as Warner Music, is an American major global record company headquartered in New York City. The largest American-owned music conglomerate worldwide, it is one of the 'big three' recording companies (the third largest in the global music industry). The company operates some of the largest and most successful recording labels in the world, including its flagship labels Warner Bros. Records, Parlophone Records and Atlantic Records. WMG also owns Warner/Chappell Music, one of the world's largest music-publishing companies.

Formerly owned by Time Warner, the world's largest media conglomerate, the company was publicly traded on the New York Stock Exchange until May 2011, when it announced its privatization and sale to Access Industries, which was completed in July 2011. With a multi-billion dollar annual turnover, WMG employs in excess of 4,000 people and has operations in more than 50 countries throughout the world.

Warner/Chappell Music dates back to 1811 and the creation of Chappell & Company, a sheet music and instrument merchant in London. In 1929, Jack Warner, president of Warner Bros. Pictures Inc., founded Music Publishers Holding Company (MPHC) to acquire music copyrights as a means of providing inexpensive music for films and, in 1987, Warner Bros.' corporate parent, Warner Communications, acquired Chappell & Company. Its printed music operation, Warner Bros. Publications, was sold to Alfred Publishing on June 1, 2005.

Among the historic compositions of which the publishing rights are controlled by WMG are the works of Cole Porter, Richard Rodgers and Lorenz Hart. In the 1930s and 1940s, Chappell Music also ran a profitable orchestration division for Broadway musicals, with house arrangers of the caliber of Robert Russell Bennett, Don Walker, Ted Royal and Hans Spialek. Between them they had orchestrated 90 percent of the productions seen up to the war years.

Reissues
WMG's Rhino Entertainment reissues recordings from the WMG vaults and their aforementioned Rhino Handmade sublabel issues limited edition albums of lesser known and cult status recordings from the WMG vaults.