FISERV INC revenue for the last year amounted to 17.37 B CHF, the most of which — 8.75 B CHF — came from its highest performing source at the moment, Merchant. The greatest contribution to the revenue figure was made by United States and Canada — last year it brought FISERV INC 15.79 B CHF, and the year before that — 13.66 B CHF.