INVESTOR AB CLASS B revenue for the last year amounted to 5.33 B EUR, the most of which — 10.23 B EUR — came from its highest performing source at the moment, Listed Companies, the year earlier bringing -2.47 B EUR. The greatest contribution to the revenue figure was made by United States — last year it brought INVESTOR AB CLASS B 3.21 B EUR, and the year before that — 2.79 B EUR.