Apax Partners, a private equity firm, completed the acqusition of a majority stake in Porsolt, a contract research organization. Financial terms were not disclosed. "The arrival of Apax as a major investor allows Porsolt to continue to provide outstanding services and quality science to our customers, while growing to meet the increased global demand for preclinical research services. We are looking forward to working with Apax, an ideal partner with vast experience and resources to assist with implementing key strategies and realizing our combined vision," Guillaume Froget, Porsolt President and CEO of Porsolt.