Japan's Sumitomo Dainippon Pharma Co. Ltd. plans to pay $3 billion to acquire Roivant Sciences Ltd.'s ownership interests in five biopharma companies, plus options to acquire up to six more from the prolific company-builder. The deal, slated to close in October, would give Sumitomo Dainippon controlling interests in Myovant Sciences Inc., Urovant Sciences Inc., Enzyvant Therapeutics Inc. and Altavant Sciences Inc., as well as an equity stake of more than 10% in Roivant itself.