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Regeneron Pharmaceuticals, Inc. (REGN) Faces Securities Class Action Amid Disclosures About Key Trial's Protocol and Ultimate Failure - HBSS

$REGNPress releaseJul 24, 2026, 8:00 AM ETRead the release

Hagens Berman announced a securities class action investigation against Regeneron Pharmaceuticals concerning disclosures related to the failed Phase 3 trial of Fianlimab and Libtayo. The lawsuit alleges Regeneron made false statements regarding the trial protocol and failed to disclose that statistical assumptions were flawed and the primary endpoint was unlikely to be achieved.

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