Amgen Inc. revenue for the last year amounted to 28.19 B USD, the most of which — 26.91 B USD — came from its highest performing source at the moment, Human Therapeutics, the year earlier bringing 24.80 B USD. The greatest contribution to the revenue figure was made by United States — last year it brought Amgen Inc. 19.81 B USD, and the year before that — 18.59 B USD.