MERCK KGAA O.N. revenue for the last year amounted to 21.16 B EUR, the most of which — 8.92 B EUR — came from its highest performing source at the moment, Life Science, the year earlier bringing 9.28 B EUR. The greatest contribution to the revenue figure was made by United States — last year it brought MERCK KGAA O.N. 5.65 B EUR, and the year before that — 5.91 B EUR.