FISERV INC COM STK USD0.01 revenue for the last year amounted to 18.04 B USD, the most of which — 8.13 B USD — came from its highest performing source at the moment, Acceptance, the year earlier bringing 7.29 B USD. The greatest contribution to the revenue figure was made by United States — last year it brought FISERV INC COM STK USD0.01 16.23 B USD, and the year before that — 15.25 B USD.