MERCK & CO revenue for the last year amounted to 50.61 B CHF, the most of which — 45.11 B CHF — came from its highest performing source at the moment, Pharmaceutical, the year earlier bringing 48.09 B CHF. The greatest contribution to the revenue figure was made by United States — last year it brought MERCK & CO 23.98 B CHF, and the year before that — 25.16 B CHF.