Amgen Inc. (NASDAQ:AMGN) ranks among the top picks for a retirement portfolio. On September 26, Amgen Inc. (NASDAQ:AMGN) unveiled a $650 million upgrade to its manufacturing facility in Juncos, Puerto Rico, which is estimated to create around 750 additional jobs. The investment will help to improve medicine production capacities and incorporate innovative technology across the operations process. Pixabay/Public Domain The announcement builds on Amgen’s recent investments, which include a$1 billion expa ...