Philadelphia, Pennsylvania--(Newsfile Corp. - September 21, 2026) - National plaintiffs' law firm Berger Montague PC announces a class action lawsuit against Datavault AI Inc. (NASDAQ: DVLT) ("Datavault" or the "Company") on behalf of investors who purchased or acquired Datavault securities during the period from September 4, 2024 through October 30, 2025 (the "Class Period").Investor Deadline: Investors who purchased or acquired Datavault securities during the Class Period may, no later than October 5, 20 ...