Sanofi US Company History Timeline

(5,872 Jobs)

In 1973 French cosmetics firm L’Oréal purchased a majority ownership in Synthélabo and continued to develop the company’s global market for prescription drugs.

Found in the year 1973 as a spin-off of Elf Aquitaine the popular oil company of France, Sanofi had a late start.The name got into the big league of pharmaceutical companies of France within a span of ten years.


In 1980, the Clin Midy group was acquired by Sanofi.


The two companies eventually merged to form Rhône-Poulenc Rorer in 1990.


The company was founded in 1994 and is headquartered in Paris, France.“


The two young groups Sanofi and Synthélabo merged in May 1999 to create a major new pharmaceutical player.

In December 1999, Rhône-Poulenc and Hoechst Marion Roussel formalized their merger with the creation of the Franco-German group Aventis, one of the world’s largest pharmaceutical companies.

International competition and consolidation in the pharmaceutical industry, however, led to the merger that created Sanofi-Synthélabo SA in 1999.

Aventis Aventis, former French pharmaceutical company founded in 1999 through the merger of the German firm Hoechst and the French company Rhône-Poulenc.


In August 2004, Sanofi-Synthelabo acquired Aventis.

Sanofi-Aventis, French pharmaceutical company founded in 2004 through the merger of Sanofi-Synthélabo SA and a much larger French firm, Aventis.

In 2004 a proposed bid for Aventis by Swiss firm Novartis AG prompted Sanofi-Synthélabo to acquire its larger domestic rival.

The landmark merger between Sanofi and Aventis took place in the year 2004 with the government of France playing a major part in finalising the deal.


On May 6, 2011, sanofi-aventis simplified its name to Sanofi.”

Following lengthy negotiations, Sanofi-Aventis announced in 2011 that it was purchasing the United States biotechnology company Genzyme for about $20 billion.

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Bridgewater, NJ
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