CONSTELLATION SOFTWARE INC revenue for the last year amounted to 14.49 B CAD, the most of which — 10.13 B CAD — came from its highest performing source at the moment, Maintenance and Other Recurring, the year earlier bringing 8.08 B CAD. The greatest contribution to the revenue figure was made by United States — last year it brought CONSTELLATION SOFTWARE INC 6.17 B CAD, and the year before that — 5.12 B CAD.