Investigation in Progress — No Complaint Filed Yet
BG&G is actively investigating potential securities fraud claims against Biogen Inc.. If a complaint is filed, this page will be updated. Investors are encouraged to contact us now to preserve their rights.
Bronstein, Gewirtz & Grossman, LLC is investigating potential claims on behalf of purchasers of Biogen Inc. (“Biogen” or “the Company”) (NASDAQ: BIIB). Investors who purchased Biogen securities are encouraged to obtain additional information and assist the investigation.
The investigation concerns whether Biogen has violated federal securities laws.
Biogen Investigation Details
On May 14, 2026, Biogen revealed that the topline data from its Phase 2 CELIA study for diranersen failed to meet its primary endpoints. Following this news, Biogen’s stock price dropped 6.4% on the same day.
What’s Next for Biogen Investors?
If you are aware of any facts relating to this investigation or purchased Biogen securities, you can assist this investigation. You can also contact Peretz Bronstein or his client relations manager, Nathan Miller, of Bronstein, Gewirtz & Grossman, LLC: 917-590-0911
BIIB — Stock Performance
About Bronstein, Gewirtz & Grossman, LLC
We represent investors in class actions on a contingency fee basis. That means we will ask the court to reimburse us for out-of-pocket expenses and attorneys' fees, usually a percentage of the total recovery, only if we are successful.
Bronstein, Gewirtz & Grossman, LLC is a nationally recognized firm that represents investors in securities fraud class actions and shareholder derivative suits. Our firm has recovered hundreds of millions of dollars for investors nationwide.
“Our practice centers on restoring investor capital and ensuring corporate accountability, which serves to uphold the essential integrity of the marketplace.”