That’s an 83% premium to AMBI’s closing price on Friday; some excerpts from the jointly issued PR: Daiichi Sankyo Company, Ltd. and Ambit Biosciences (AMBI) jointly announced today that they have entered into a definitive merger agreement under which Daiichi Sankyo will acquire all of the outstanding common stock of Ambit Biosciences for $15 per share in cash through a tender offer followed by a merger with a subsidiary of Daiichi Sankyo, or approximately $315 million on a fully diluted basis. In addition to the upfront cash payment, each Ambit Biosciences stockholder will receive one Contingent Value Right (CVR), entitling the holder to receive an additional cash payment of up to $4.50 for each share they own if certain commercialization related milestones are achieved. …The lead Ambit Biosciences drug candidate, quizartinib, is currently in phase 3 clinical trials among patients with acute myeloid leukemia (AML), who express a genetic mutation in FLT3 and who are refractory to or relapsed after first-line treatment with or without hematopoietic stem cell transplantation (HSCT) consolidation. Daiichi Sankyo is Japan’s largest pharmaceutical company.