Regeneron Pharmaceuticals, Inc. (REGN) Investors: September 14, 2026 Lead Plaintiff Deadline in Class Action Lawsuit Accessibility Statement Skip Navigation National shareholder rights firm Hagens Berman is investigating the legal claims and urges Regeneron investors with substantial losses to submit your losses now. The firm also invites persons who may be able to assist in the investigation to contact its attorneys. Class Period: Aug. 1, 2025 – May 15, 2026Lead Plaintiff Deadline: Sept. 14, 2026Visit: htt ...