Investors can contact the law firm at no cost to learn more about recovering their losses LOS ANGELES, Aug. 06, 2025 (GLOBE NEWSWIRE) -- The Portnoy Law Firm advises Altimmune, Inc. ("Altimmune" or the "Company") (NASDAQ: ALT) investors of a class action representing investors that bought securities between August 10, 2023 and June 25, 2025, inclusive (the "Class Period"). Altimmune investors have until October 6, 2025 to file a lead plaintiff motion. Investors are encouraged to contact attorney Lesley F. P ...