CHALL.ENERGY GR. LS-,01 revenue for the last year amounted to 3.25 M EUR, the most of which — 3.33 M EUR — came from its highest performing source at the moment, Oil and Gas Exploration, Development and Production, the year earlier bringing 3.91 M EUR. The greatest contribution to the revenue figure was made by Trinidad & Tobago — last year it brought CHALL.ENERGY GR. LS-,01 3.33 M EUR, and the year before that — 3.91 M EUR.