Sanofi (SNY) 6-K Gilles SCHNEPP takes over as Chairman of the Appointments, Governance and CSR Committee of Sanofi

Exhibit 99.1

Press Release Source: Sanofi (EURONEXT: SAN) (NASDAQ: SNY)

Gilles SCHNEPP takes over as Chairman of the Appointments, Governance and CSR Committee of Sanofi

PARIS – December 16, 2021 - On December 15, 2021, the Board of Directors appointed Gilles Schnepp, an independent director of Sanofi, as Chairman of the Appointments, Governance and CSR Committee. Gilles Schnepp leaves his position on the Audit Committee.

This appointment follows Serge Weinberg’s decision to step down as Chairman of the Appointments, Governance and CSR Committee, as he will no longer be an independent director in December 2021, after 12 years of service on the Board of Directors of the group, in accordance with the Afep-Medef Code.

As Serge Weinberg’s term of office will expire at the end of the 2023 General Meeting, this decision will also enable the Group to continue preparing his succession in the best possible way.

About Sanofi

Sanofi is dedicated to supporting people through their health challenges. We are a global biopharmaceutical company focused on human health. We prevent illness with vaccines, provide innovative treatments to fight pain and ease suffering. We stand by the few who suffer from rare diseases and the millions with long-term chronic conditions. With more than 100,000 people in 100 countries, Sanofi is transforming scientific innovation into healthcare solutions around the globe.

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Felix Lauscher

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investor.relations@sanofi.com

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