NEW YORK, Aug. 06, 2025 (GLOBE NEWSWIRE) -- Gainey McKenna & Egleston announces that a securities class action lawsuit has been filed in the United States District Court for the District of Maryland on behalf of all persons or entities who purchased the securities of Altimmune, Inc. (“Altimmune” or the “Company”) (NASDAQ: ALT) between August 10, 2023 and June 25, 2025, both dates inclusive (the “Class Period”). The Complaint alleges that Defendants provided overwhelmingly positive statements to investors wh ...