Sanofi — Report Publication Announcement 2013

Mar 8, 2013

Filing of the 2012 U.S. Form 20-F and French "Document de Référence" containing the Annual Financial Report

Paris, France – March 8, 2013 – Sanofi (EURONEXT: SAN and NYSE: SNY) announced today the filing of its Form 20-F with the U.S. Securities and Exchange Commission (SEC) and its "Document de Référence" containing its Annual Financial Report with the French market regulator Autorité des marchés financiers (AMF).

These documents are available on the "Investors" page of the company's corporate website (www.sanofi.com) under the heading "Regulated Information in France." In addition, the Form 20-F is available on the website of the SEC (www.sec.gov), and the "Document de Référence" is available on the website of the AMF (www.amf-france.org). Shareholders may receive a hard copy of these documents, each of which contains our complete audited financial statements, free of charge, upon request.

About Sanofi

Sanofi, a global and diversified healthcare leader, discovers, develops and distributes therapeutic solutions focused on patients' needs. Sanofi has core strengths in the field of healthcare with seven growth platforms: diabetes solutions, human vaccines, innovative drugs, consumer healthcare, emerging markets, animal health and the new Genzyme. Sanofi is listed in Paris (EURONEXT: SAN) and in New York (NYSE: SNY).

Contacts:

Media Relations Investor Relations Jean-Marc Podvin Sébastien Martel Tel.: + (33) 1 53 77 46 46 Tel.: + (33) 1 53 77 45 45 mr@sanofi.com ir@sanofi.com