PART of Stream, the corporate software and printing company, is to be floated in the United States, the company said last night. The move is part of a restructure of the company, which has factories in Dublin and Derry, planned by the Irish president of its international division, Mr Paul Kavanagh. R.R. Donnelley & Sons currently owns about 80 per cent of the outstanding shares of Stream International Holdings. The firm said that after the completion of the initial public offering, it will control less than 40 per cent of Stream International, and less than a majority interest in Corporate Software & Technology and Modus Media International, which are also to be spun off.