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Altimmune, Inc. Sued for Securities Law Violations – Investors Should Contact Levi & Korsinsky for More Information – ALT

Key Takeaway: Altimmune, Inc. is currently embroiled in a class action securities lawsuit initiated by Levi & Korsinsky, LLP, representing investors who believe they were misled about the company's financial health. The lawsuit stems from Altimmune's Phase 2b MASH trial results for Pemvidutide, which failed to achieve statistical significance, leading to a dramatic stock price drop of 53.2% in one day. The class action seeks to recover losses for those adversely affected from August 10, 2023, to June 25, 2025, allowing impacted investors to request appointment as lead plaintiff until October 6, 2025. The suit accuses Altimmune of providing inflated expectations that contributed to the loss.

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CONCERNS & RISKS

  • Altimmune is facing a class action lawsuit due to alleged securities fraud.
  • The company's stock price fell 53.2% in one day after disappointing Phase 2 trial results.
  • Investors are reportedly adversely affected by inflated expectations set by the company prior to the trial.
  • The results from the trial failed to meet statistical significance, raising concerns among investors.

Full Press Release Details

NEW YORK, Aug. 14, 2025 (GLOBE NEWSWIRE) -- Levi & Korsinsky, LLP notifies investors in Altimmune, Inc. ("Altimmune" or the "Company") (NASDAQ: ALT) of a class action securities lawsuit.
CLASS DEFINITION: The lawsuit seeks to recover losses on behalf of Altimmune investors who were adversely affected by alleged securities fraud between August 10, 2023 and June 25, 2025. Follow the link below to get more information and be contacted by a member of our team:
ALT investors may also contact Joseph E. Levi, Esq. via email at jlevi@levikorsinsky.com or by telephone at (212) 363-7500.
CASE DETAILS: According to the complaint, on June 26, 2025, Altimmune published a press release announcing topline results from the IMPACT Phase 2b MASH trial of Pemvidutide in the Treatment of MASH. While defendants had continuously provided inflated expectations ahead of these results, the analysis showed a pointed failure by the Company to achieve statistical significance in its analysis of the fibrosis reduction primary endpoint in its IMPACT Phase 2b MASH trial. In particular, while a positive trend in fibrosis improvement was observed, statistical significance was not met due to a higher-than-expected placebo response. When questioned about this concerning miss, defendants answered indifferently, attributing this result to the Phase 2 nature of the trial and stated that Altimmune was hoping for better results following the Phase 3 trial. Following this news, the price of Altimmune’s common stock declined dramatically. From a closing market price of $7.71 per share on June 25, 2025, Altimmune’s stock price fell to $3.61 per share on June 26, 2025, a decline of 53.2% in the span of just a single day.
WHAT'S NEXT? If you suffered a loss in Altimmune during the relevant time frame, you have until October 6, 2025 to request that the Court appoint you as lead plaintiff. Your ability to share in any recovery doesn't require that you serve as a lead plaintiff.
NO COST TO YOU: If you are a class member, you may be entitled to compensation without payment of any out-of-pocket costs or fees. There is no cost or obligation to participate.
WHY LEVI & KORSINSKY: Over the past 20 years, the team at Levi & Korsinsky has secured hundreds of millions of dollars for aggrieved shareholders and built a track record of winning high-stakes cases. Our firm has extensive expertise representing investors in complex securities litigation and a team of over 70 employees to serve our clients. For seven years in a row, Levi & Korsinsky has ranked in ISS Securities Class Action Services’ Top 50 Report as one of the top securities litigation firms in the United States.
Levi & Korsinsky, LLP
Joseph E. Levi, Esq.
33 Whitehall Street, 17th Floor

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Frequently Asked Questions

What is the Altimmune class action lawsuit about?

The lawsuit aims to recover losses for investors affected by alleged securities fraud from August 10, 2023, to June 25, 2025.

What happened to Altimmune's stock price recently?

Altimmune's stock fell from $7.71 to $3.61 per share, a drop of 53.2%, after disappointing trial results.

How can Altimmune investors join the lawsuit?

Investors can request to be lead plaintiff until October 6, 2025, without out-of-pocket costs.

Who can I contact for more information about the lawsuit?

Contact Joseph E. Levi, Esq. at jlevi@levikorsinsky.com or call (212) 363-7500.

Is there a cost to participate in the Altimmune lawsuit?

No, class members may be entitled to compensation with no fees or costs involved.

Last updated: Aug 14, 2025