Regeneron Pharmaceuticals, Inc. announced that Robert J. Terifay has resigned as Executive Vice President, Commercial Effective January 5, 2018, and related positions. Mr. Terifay has been placed on a personal leave of absence as he requested for medical reasons through July 31, 2018. During his leave of absence, he will be able to participate in the company's health insurance plans and other similar plans, but will not receive any cash compensation. After the conclusion of his leave of absence on July 31, 2018, Mr. Terifay will retire. Thereafter, Mr. Terifay will be eligible for his continued participation in Regeneron's health insurance plans subsidized by Regeneron through January 31, 2020. The company is conducting a search for Mr. Terifay's replacement.