Aventis

French-German company

Written and fact-checked byThe Editors of Encyclopaedia Britannica

Updated: Nov. 12, 2026

Date:: 1999 - present

Headquarters:: Strasbourg

Areas Of Involvement:: pharmaceutical

Ticker:: SNY

Share price:: $48.46 (mkt close, Nov. 12, 2026)

Market cap:: $116.04 bil.

Annual revenue:: $50.98 bil.

Earnings per share (prev. year):: $2.01

CEO:: Ms. Belen Garijo Lopez M.D.

Sector:: Health Care

Industry:: Pharmaceuticals

Aventis, former French pharmaceutical company founded in 1999 through the merger of the German firm Hoechst and the French company Rhône-Poulenc. With headquarters in Strasbourg, France, Aventis was the product of the first transnational merger to combine large rival companies from France and Germany. It became part of the French pharmaceutical conglomerate Sanofi-Aventis in 2004.

This article was most recently revised and updated by The Editors of Encyclopaedia Britannica