(Reuters) - UnitedHealth Group unit OptumRx Corp agreed to buy pharmacy benefit manager Catamaran Corp in a deal worth $12.78 billion.
UnitedHealth's offer of $61.50 per share represents a premium of 27 percent to CATAMARAN (CTRX.NQ)s Friday close of $48.32 on the Nasdaq.
(Reporting by Sneha Banerjee in Bengaluru; Editing by Savio D'Souza)
