Biogen IncPomerantz LLP is investigating Biogen for securities fraud related to the Phase 2 CELIA study missing its primary endpoint, causing a 6.43% stock drop.

Pomerantz LLP is investigating claims on behalf of investors of Biogen Inc. The investigation concerns whether Biogen and certain of its officers and/or directors have engaged in securities fraud or other unlawful business practices. On May 14, 2026, Biogen announced topline results from the Phase 2 CELIA study evaluating diranersen in early Alzheimer’s disease, and although the company described the results as compelling, the study missed its primary dose-response endpoint. Following this news, Biogen’s stock price fell $13.16 per share, or 6.43%, to close at $191.37 per share on May 14, 2026.
Biogen IncPomerantz LLP is investigating Biogen for securities fraud related to the Phase 2 CELIA study missing its primary endpoint, causing a 6.43% stock drop.