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Portnoy Law Firm Announces Class Action on Behalf of Regeneron Pharmaceuticals, Inc. Investors
GlobeNewswire Inc.·
The Portnoy Law Firm has filed a class action lawsuit on behalf of Regeneron Pharmaceuticals investors who purchased securities between August 1, 2025 and May 15, 2026. The lawsuit alleges that Regeneron made false statements about its Phase III Fianlimab-Libtayo clinical trial, misrepresenting the study's prospects while downplaying risks. The trial ultimately failed to reach statistical significance on its primary endpoint, causing Regeneron's stock to drop approximately 10% on May 15, 2026.
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