Regeneron Pharmaceuticals
Regeneron Pharmaceuticals, Inc. is an American biotechnology company headquartered in Westchester County, New York. Originally focused on neurotrophic factors and their regenerative capabilities, the company then branched out into the study of both cytokine and tyrosine kinase receptors. Regeneron has developed aflibercept, a VEGF inhibitor, and rilonacept, an interleukin-1 blocker.