Blackstone Inc. BX is closing in on an acquisition of software developer Civica for $2.5 billion, The Wall Street Journal reported Tuesday. The seller on the deal is Partners Group Holding AG, another private-equity firm that paid about $1.3 billion for Civica in 2017. The purchase by Blackstone Group could be announced as early as Wednesday, the WSJ reported, citing people familiar with the firm. Spokespeople from Blackstone and Partners Group did not respond to a MarketWatch request for comment.