Hauck was founded in 1985 and boasts clients such as GlaxoSmithKline, Procter & Gamble and J Sainsbury. It has 90 staff, and pretax profits of £600,000 last year.
Incepta will pay £12.5m in either cash or a mix of cash and shares, with an initial payment of £4m.
David Wright, executive chairman of Incepta, said, "Hauck provides complementary expertise and resources to our current market research offering that includes Citigate DVL Smith."
Shares in Incepta were trading up 9.3% this morning at 46.4p.
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