Simpson Thacher represented BofA Securities, Inc. (the “Underwriter”) in connection with the secondary offering by affiliates of Thomas H. Lee Partners, L.P. and Advent International Corporation of an aggregate of 7,000,000 shares of Syneos Health, Inc.’s (“Syneos Health”) common stock. In connection with the offering, Syneos Health repurchased 400,000 shares of its common stock from the selling stockholders.~~Syneos Health is a leading global biopharmaceutical solutions organization providing a full suite of clinical and commercial services to customers in the biopharmaceutical, biotechnology and medical device industries. Syneos Health offers both stand-alone and integrated biopharmaceutical product development solutions through its Contract Research Organization and Contract Commercial Organization, ranging from Early Phase (Phase I) clinical trials to the full commercialization of biopharmaceutical products, with the goal of increasing the likelihood of regulatory approval and commercial success.~~The Simpson Thacher team included Roxane Reardon, Sean Dougherty and Humberto Romero Carrillo (Capital Markets); Marcy Geller and Scott Grundei (Tax); Vanessa Burrows (Healthcare); Lori Lesser and Bobbie Burrows (IP); and Jennie Getsin (FINRA).