The Blackstone Group has taken a majority stake in Mumbai-based CMS Computers and set-up up a company by carving out the IT infrastructure management and outsourced business services division. The new company's valuation is estimated to be around Rs 500-550 crore. Blackstone is understood to have taken slightly less than 55 per cent stake, and Rajiv Kaul — appointed as its executive vice chairman and CEO — is understood to have taken a minority stake of around 5 per cent. Till recently, Kaul was a global partner with Actis Capital LLP based out of London. Prior to that, he was with Microsoft for over 10 years. His last assignment at Microsoft was as senior director for emerging markets, including BRIC-based in Redmond and the US. […]