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Founders

Who Founded Sanofi?

Jean-François Dehecq, René Sautier · Founded 2004 · HQ today: Paris, France

Who founded Sanofi?

Sanofi was founded by Jean-François Dehecq, René Sautier in 2004. It is now led by Belén Garijo.

Founders
Jean-François Dehecq, René Sautier
Founded
2004
Headquarters
Paris, France
Number of founders
2
Current CEO
Belén Garijo (since 2026)
Where was Sanofi founded?
Sanofi was founded in Paris, France in 2004.
When was Sanofi founded?
Sanofi was founded in 2004.
Who started Sanofi?
Sanofi was founded by Jean-François Dehecq and René Sautier.
How old is Sanofi?
Sanofi is 22 years old as of 2026.

Founding Story

Sanofi began in 1973 as the healthcare subsidiary of the French state-controlled oil group Elf Aquitaine, with Jean-François Dehecq leading it. It grew through acquisitions, merged with L'Oréal's drug unit Synthélabo in 1999, and in 2004 won a hostile takeover of the larger Franco-German Aventis, itself formed from Rhône-Poulenc and Hoechst. The combined Sanofi-Aventis shortened its name to Sanofi in 2011.

Jean-François Dehecq

Co-founder 1973

Background

Engineer by training who worked at France's SNPA, later part of Elf Aquitaine, before leading its healthcare diversification.

Role at Sanofi S.A.

Jean-François Dehecq led Sanofi from its creation as Elf Aquitaine's health subsidiary in 1973. He drove the 1999 merger with Synthélabo and the 2004 takeover of Aventis, served as CEO of Sanofi-Aventis until the end of 2006 and remained chairman until 2010. (Exact birth year remains publicly undisclosed).

René Sautier

Co-founder 1973

Background

Elf Aquitaine executive associated with the oil group's move into healthcare in the early 1970s.

Role at Sanofi S.A.

René Sautier is credited alongside Jean-François Dehecq with setting up Sanofi as Elf Aquitaine's pharmaceutical arm in 1973. Public records on his later role are limited. (Exact birth year remains publicly undisclosed).

Sanofi S.A.: CEO & Leadership History

Full timeline →

Belén Garijo

Chief Executive Officer

2026 – Present

The board hired her to strengthen execution discipline and capital allocation. She previously led Merck KGaA and worked at Sanofi for 15 years.

Olivier Charmeil

Interim Chief Executive Officer

2026 – 2026

Provided continuity during the leadership transition.

Paul Hudson

Former Chief Executive Officer

2019 – 2026

Grew Dupixent into a ~$17.7B (EUR15.7B) product; the board did not renew his mandate in February 2026 amid concerns over pipeline productivity.

Olivier Brandicourt

Chief Executive Officer

2015 – 2019

Olivier Brandicourt served as chief executive of Sanofi S.A. from 2015 to 2019.

Keep researching Sanofi

Who Founded Sanofi? FAQ

Who were the founders of modern Sanofi?

Modern Sanofi was founded in May 1973 by French industrial engineers Jean-François Dehecq and René Sautier under the sponsorship of French state oil conglomerate Elf Aquitaine (led by Pierre Guillaumat).

What was the original corporate entity and purpose of Sanofi in 1973?

Originally registered as "Omnium Financier Aquitaine pour l'Hygiène et la Santé" (abbreviated to Sanofi), the subsidiary was created by Elf Aquitaine to diversify petrodollar revenues into high-value pharmaceuticals, animal health, and cosmetics.

Who was Jean-François Dehecq and what was his early background?

Born in 1940 in Saint-Saulve, France, Jean-François Dehecq graduated as an engineer from the École Nationale Supérieure des Arts et Métiers. After working in highway infrastructure and Elf Aquitaine's refining operations, he was tapped by Sautier to build an integrated French pharmaceutical champion.

Who was René Sautier and what was his role in the founding?

René Sautier was a senior financial director at Elf Aquitaine who conceived the idea of building a diversified French healthcare group through acquisition. He served as Sanofi's first Chairman and mentor to Jean-François Dehecq until his retirement.

What historical 18th-century roots are embedded within Sanofi?

Through subsidiary acquisitions, Sanofi traces heritage directly back to Laboratoires Dausse (founded in 1718 in Paris by apothecary master Dausse) and Laboratoires Midy (founded in 1718 by apothecary François Midy), making Sanofi's operational lineage over 300 years old.

What early pharmaceutical acquisitions built Sanofi in the 1970s and 1980s?

Under Dehecq, Sanofi methodically acquired family-owned French pharmaceutical laboratories: Labaz, Parcor (developer of landmark antiplatelet ticlopidine/Plavix precursor), Clin-Midy, and Pasteur Institute production assets, assembling a formidable medicine portfolio.

What was Jean-François Dehecq's nickname and reputation in French business?

Dehecq was affectionately nicknamed "Le Grand" (The Giant) due to his imposing 6-foot-4 stature, booming voice, fierce national patriotism, and paternalistic devotion to his employees, famously resisting foreign hostile takeovers.

How did the founders transition Sanofi into a completely independent public company?

In the late 1990s, as Elf Aquitaine prepared to merge with Total, Dehecq negotiated Sanofi's independence, orchestrating the 1999 merger with L'Oréal's pharmaceutical arm Synthélabo to form Sanofi-Synthélabo, diluting oil ownership and establishing full corporate autonomy.

What was the founders' vision for a European pharmaceutical champion?

Dehecq believed passionately that Europe could not surrender life sciences leadership to American and Swiss conglomerates. He engineered the audacious 2004 takeover of German-French rival Aventis specifically to create an unassailable European pharmaceutical titan.

When did Jean-François Dehecq retire from Sanofi?

Dehecq stepped down as CEO in 2006 after 33 years at the helm, continuing as Chairman of the Board until May 2010, remaining one of the most revered figures in French industrial history.

What civic and national roles did Jean-François Dehecq hold?

Dehecq served as Chairman of the French National Industry Conference (CNI) advising French presidents and was decorated with the Grand Officer of the Legion of Honor, recognized for creating hundreds of thousands of French high-tech jobs.

What enduring legacy did the founders leave behind for modern Sanofi?

Dehecq and Sautier took a modest oil-industry corporate venture with zero pharmaceutical patents in 1973 and built it through audacity, engineering discipline, and strategic mergers into one of the top five healthcare companies on Earth.

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Content is for informational purposes only. Not financial advice. Data sourced from SEC filings, annual reports, and public records. See our full disclaimer and methodology.