The owner of Saatchi & Saatchi and Starcom MediaVest Group reported revenues of €2.10 billion, up 31.7 per cent year on year.
According to Publicis Groupe’s results for the first three months of 2015, the group experienced "challenges in several of its businesses" in the UK despite a "vibrant" market.
Maurice Lévy, the chairman and chief executive of Publicis Groupe, said: "Our revenue is up to slightly over 30 per cent, partly due to the positive impact of exchange rates, and partly to the inclusion of Sapient since completing the acquisition.
"As we’ll continue to see, this is one of the important milestones of the groupe’s transformation.
"We expected organic growth to be slightly down this quarter, but, on the contrary, it is up almost 1 per cent. This isn’t yet the growth rate we expect to see out of Publicis Groupe, but is nonetheless an encouraging return to growth."
Publicis Groupe’s European revenue climbed by 21.3 per cent year on year. When the impact of acquisitions and currency fluctuations are excluded organic growth was 1.7 per cent across Europe.