REGN Investor Alert: Levi & Korsinsky Investigates Regeneron Pharmaceuticals, Inc. (REGN) for Potential Securities Fraud

NEW YORK--(BUSINESS WIRE)--Regeneron Pharmaceuticals (NASDAQ: REGN) shares dropped sharply after the Company disclosed on May 16, 2026, that its Phase 3 trial of fianlimab plus Libtayo in first-line metastatic melanoma failed to meet its primary endpoint versus Merck's Keytruda. Shareholders who lost money on REGN are encouraged to submit their information here. You may also contact Joseph E. Levi, Esq. via email at jlevi@levikorsinsky.com or by telephone at (212) 363-7500. During the Q1 2026 e.