NEW YORK, Sept. 02, 2025 (GLOBE NEWSWIRE) -- WHY: Rosen Law Firm, a global investor rights law firm, reminds purchasers of securities of Altimmune, Inc. (NASDAQ: ALT) between August 10, 2023 and June 25, 2025 (the “Class Period”), of the important October 6, 2025 lead plaintiff deadline. SO WHAT: If you purchased Altimmune securities you may be entitled to compensation without payment of any out of pocket fees or costs through a contingency fee arrangement. WHAT TO DO NEXT: To join the Altimmune class acti ...