BHG Acquisition Corp. has filed for a $350 million IPO, with Credit Suisse and Deutsche Bank Securities serving as co-lead underwriters. The Greenwich, Conn.-based blank check acquisition company is led by Cliff Robbins, a former partner with both General Atlantic and KKR, who currently runs an investment manager firm called Blue Harbour Group. The only other listed manager is Avenue Capital Group chief executive Marc Lasry, who will serve as a director.