RSO Records was a record label formed by rock and roll and musical theatre impresario Robert Stigwood in 1973. The "RSO" stands for the Robert Stigwood Organisation. The company's main headquarters were at 67 Brook Street, in London's Mayfair. It underwent four distribution stages: by Atlantic Records from March 1973 to December 1975, by Polydor Records from January 1976 to December 1977, as an independent label from January 1978 to around October 1981, and finally by PolyGram Records from around November 1981 until the label's end in 1983.
RSO managed the careers of several superstars (Bee Gees, Yvonne Elliman, Eric Clapton, Andy Gibb), and, as a record label, released the soundtracks to Fame, Sparkle, The Empire Strikes Back, Return of the Jedi, Times Square, Grease (over 30 million copies sold worldwide), and Saturday Night Fever (over 35 million copies sold worldwide). The release of the latter two albums made RSO one of the most financially successful labels of the 1970s.