The acquisition - which ends a two-month-long auction of Onyx - represents the fifth-largestbiotechnology deal in history. It gives Amgen full rights to Kyprolis, the new multiple myeloma drug that analysts expect to reach annual peak sales in excess of $2 billion.
The world's largest biotechnology company will also gain a revenue stream from the liver and kidney cancer drug Nexavar that Onyx shares with Bayer AG