RELX PLC revenue for the last year amounted to 9.82 B CHF, the most of which — 3.36 B CHF — came from its highest performing source at the moment, Risk, the year earlier bringing 3.25 B CHF. The greatest contribution to the revenue figure was made by North America — last year it brought RELX PLC 5.71 B CHF, and the year before that — 5.59 B CHF.