Havas reported first quarter revenue rose three percent to €389M -- about $537M -- on an organic basis on strong gains in North America and the UK.

Chairman and CEO Yannick Bollore called the organic growth "very satisfactory," singling out account wins for PayPayl in North America, Iglo in Europe and Pao de Açucar in Brazil.

Key Havas PR wins for the quarter included AOR duties for Au Bon Pain in North America, digital and PR work for NetJets, Nations Cup PR for Danone in the UK, and retailer Go Outdoors (UK).

North America is "back in positive terrain" for the marketing conglomerate with organic growth of 3.7% to €130M. While the UK shined (+11.7% to €52M), Spain, the Netherlands and Switzerland held back European growth overall as France was flat at €80M.

While revenue was flat compared to Q1 of 2013, Havas took a €12M hit on the euro strengthening against the dollar and South American currencies.

Havas shares spiked more than three percent today after the Omnicom-Publicis deal fell apart, sparking speculation that Havas could be a takeover target.