INVESTORS & MEDIA

Regeneron Named Among Top Two Global Biopharmaceutical Employers by Science Magazine for Fifth Year in a Row

Tarrytown, New York (October 29, 2015) - Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) today announced that Science magazine has ranked Regeneron as one of the world's top two biopharmaceutical employers for the fifth consecutive year. This year, the company was named number two, following first place rankings in 2012, 2013 and 2014 and a second place ranking in 2011.

The ranking indicates that Regeneron earned high marks among survey respondents for being an innovative leader in industry, treating employees with respect, engendering employee loyalty, operating in a manner that is socially responsible, having a clear vision and producing important, quality research.

"Regeneron has built a unique science-driven culture that empowers each individual to help deliver on our mission of translating science into new medicines for people with serious diseases," said George D. Yancopoulos, M.D., Ph.D., President, Regeneron Laboratories and Chief Scientific Officer, Regeneron. "Today more than 4,000 people make up the Regeneron team, and we continue to grow rapidly as we bring new medicines to patients and advance our innovative pipeline. We are always looking for talented individuals who bring a passion for innovative thinking, scientific exploration and collaboration."

The Science and Science Careers 2015 annual Top Employers Survey polled employees in the biotechnology, biopharmaceutical, pharmaceutical and related industries to determine the best employers in these industries, as well as their driving characteristics. Survey respondents rated Regeneron highly based on 23 characteristics, including a research-driven environment, respect and loyalty toward employees, ability to adapt to change and financial strength.

According to Science, the 2015 global survey results were based on over 5,700 responses from North America (57 percent), Europe (27 percent) and Asia/Pacific Rim (11 percent).

For the complete feature including individual company rankings, please visit www.sciencecareers.org/TopEmployers2015.

About Regeneron Pharmaceuticals, Inc. Regeneron (NASDAQ: REGN) is a leading science-based biopharmaceutical company based in Tarrytown, New York that discovers, invents, develops, manufactures and commercializes medicines for the treatment of serious medical conditions. Regeneron commercializes medicines for high LDL cholesterol, eye diseases and a rare inflammatory condition and has product candidates in development in other areas of high unmet medical need, including oncology, rheumatoid arthritis, asthma, atopic dermatitis, pain and infectious disease. For additional information about the company, please visit www.regeneron.com or follow @Regeneron on Twitter.

Your Media Contact at Regeneron: Alexandra Bowie, Tel. 914.847.3407 E-Mail: alexandra.bowie@regeneron.com