Merial Acquires Merck Manufacturing Facility in Barceloneta, Puerto Rico

Paris, France - December 4, 2014 - Sanofi announced that Merial, its animal health

company, is acquiring the Merck manufacturing facility in Barceloneta, Puerto Rico. The proposed

transaction requires approval from the United States Federal Trade Commission.

If approved, the acquisition will allow Merial to expand its global manufacturing operations and

make use of the site’s expertise in chewables’ manufacturing technology. As part of the agreement,

Merial will retain the approximately 200 Merck Barceloneta employees currently employed at this

formulation and packaging site.

"The Barceloneta manufacturing operation aligns well with Sanofi and Merial’s global business and

manufacturing strategies,” said Merial CEO and Sanofi EVP Carsten Hellmann. “This addition to

Merial’s global manufacturing network, which spans nine countries, enables Merial to further extend

its global production capabilities to deliver high-quality and innovative medicines that enhance the

health and well-being of animals. We look forward to assuming responsibility for this global

production site and welcoming its experienced employees to Merial.”

The formulation and packaging operations of the site were put up for sale by Merck. The

Barceloneta production facility has been involved in and will maintain responsibility for

manufacturing and packaging Merial’s industry-leading Heartgard® and Heartgard® Plus products.

About Heartgard and Heartgard Plus

Heartgard and Heartgard Plus are products used to help prevent heartworm disease in dogs and

cats. If not treated, this disease can be fatal. Heartgard is one of the top 5 best-selling animal health

products of all time. Heartgard Plus, which is also used to treat and control roundworms and

hookworms in dogs, today is the number 1 choice for heartworm prevention in dogs by U.S.

veterinarians.

About Merial

Merial is a world-leading, innovation-driven animal health company, providing a comprehensive

range of products to enhance the health, well-being and performance of a wide range of animals.

Merial employs around 6,200 people and operates in more than 150 countries worldwide with more

than to €2 billion of sales. Merial is a Sanofi company. www.merial.com

About Sanofi

Sanofi, a global 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).2/2

Sanofi Forward-Looking Statements

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as amended. Forward-looking statements are statements that are not historical facts. These statements include

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including post marketing, decisions by regulatory authorities, such as the FDA or the EMA, regarding whether and when

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decisions regarding labelling and other matters that could affect the availability or commercial potential of such product

candidates, the absence of guarantee that the product candidates if approved will be commercially successful, the future

approval and commercial success of therapeutic alternatives, the Group’s ability to benefit from external growth

opportunities, trends in exchange rates and prevailing interest rates, the impact of cost containment policies and

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Statement Regarding Forward-Looking Statements” in Sanofi’s annual report on Form 20-F for the year ended December

31, 2013. Other than as required by applicable law, Sanofi does not undertake any obligation to update or revise any

forward-looking information or statements.