NEW YORK, July 21, 2025 /PRNewswire/ -- Rosen Law Firm, a global investor rights law firm, announces the filing of a class action lawsuit on behalf of purchasers of securities of Biohaven Ltd. (NYSE: BHVN) between March 24, 2023 and May 14, 2025, both dates inclusive (the "Class Period"). A class action lawsuit has already been filed. If you wish to serve as lead plaintiff, you must move the Court no later than September 12, 2025.So What: If you purchased Biohaven securities during the Class Period you may ...