About Regeneron Pharmaceuticals, Inc.
Regeneron Pharmaceuticals, Inc. is a biotechnology company that works to discover, develop and commercialize medicines for serious diseases. The company was incorporated in New York State in 1988, and its shares have traded publicly since 1991. Its medicines and pipeline are aimed at eye diseases, allergic and inflammatory diseases, cancer, cardiovascular and metabolic diseases, pain, hematologic conditions, infectious diseases and rare diseases.
The company's corporate and research and development headquarters are in Tarrytown, New York, where its principal executive offices are also located. Other New York locations include Rensselaer, which handles large-scale biologics, and Sleepy Hollow and Armonk. Regeneron also reports sites in Basking Ridge, New Jersey, Washington, D.C., Limerick and Dublin in Ireland, and London in the United Kingdom. The company reported about 15,410 employees in 2025.
| Type | Organization |
|---|---|
| New York offices | Tarrytown, Rensselaer, Sleepy Hollow, Armonk |
| Phone | 914-847-7000 |
| Website | regeneron.com |
| Registered NY attorneys | 85 |
Organization profile based on its official website and public sources (reviewed October 29, 2026). Attorney list from the New York State Unified Court System registration data. Not affiliated with Regeneron Pharmaceuticals, Inc..
Registered attorneys
Joseph Larosa Currently registered Salvatore Colletti Currently registered Patrice Ettinger Currently registered Patricia O'Byrne Currently registered Lee Stoller Currently registered Richard Bornstein Currently registered Annabel Nau Currently registered Alessandra Ravetti-Jaeger Currently registered Jennifer Gordon Currently registered Seana Smith Currently registeredRegistration status can change at any time. Confirm any attorney's current status through the official New York Attorney Search.