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ALTEN was founded in 1988 by Simon Azoulay, Laurent Schwarz and Thierry Woog; three engineers from major schools.
Development of its establishment in France and expansion of its activities between 1988 and 1997, then IPO in 1999 on the second market of the Paris Stock Exchange. The international development started in 2000 represented 20% of turnover in 2003. Expansion towards Asia and the United States in 2012. The Group has since pursued a strategy of targeted business acquisitions in line with its core business in Europe, particularly in 2016. Thus, in 2019, the international share represented 56.8% of Group revenue.