No further details were available, except that the group had retained its 45 (£27.59) price target. Its shares were trading at 36.75 (£22.53) at 3pm yesterday.
Publicis is the world's fifth-largest advertising and communications group. It owns the eponymous Publicis, media planning and buying firm Optimedia, Saatchi & Saatchi, a 50% stake in Zenith Media and sales promotion agency Triangle.