Organic growth for the French company behind Euro RSCG and MPG slowed from 3.5% in the first quarter to 2.1% in the second quarter, echoing the experience of its larger rivals Publicis Groupe and WPP.
Pre-tax profits came in at €79m, up 11.3% from €71m in the first half of 2011.
David Jones, chief executive of Havas, said: "All our regions continued to deliver growth in the first half led by Asia, Latin America, digital, media and healthcare."
The UK registered organic first half revenue growth of 1.1%, Europe overall registered 1.5% and North America 2%. Asia Pacific and Africa were faster on 10.5% and Latin America was on 8%.
Havas has given Yannick Bolloré, the son of chairman and major shareholder Vincent Bolloré, a more senior role, on the recommendation of Jones.
Previously a vice-president at Havas, Yannick Bolloré is now directeur général délégué, the same title as Hervé Philippe.
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