Altimmune, Inc. (ALT)

Bronstein, Gewirtz & Grossman, LLC is investigating potential claims on behalf of purchasers of Altimmune, Inc. (“Altimmune” or “the Company”) (NASDAQ: ALT). Investors who purchased Altimmune securities are encouraged to obtain additional information and assist the investigation.

The investigation concerns whether Altimmune has violated federal securities laws.

Investigation Details

On June 26, 2025, Altimmune issued a press release announcing “topline results from the IMPACT Phase 2b trial of pemvidutide in metabolic dysfunction-associated steatohepatitis (MASH).” Although Altimmune described the results as “positive,” the press release reported that “[t]he effects on fibrosis improvement without worsening of MASH in an ITT analysis”—a key efficacy endpoint—”were 31.8% and 34.5% for pemvidutide 1.2 mg and 1.8 mg, respectively compared with 25.9% for placebo (differences not statistically significant).”

On this news, Altimmune’s stock price fell $4.10 per share, or 53.18%, to close at $3.61 per share on June 26, 2025.

What’s Next?

If you are aware of any facts relating to this investigation or purchased Altimmune securities, you can assist this investigation. You can also contact Peretz Bronstein or his client relations manager, Nathan Miller, of Bronstein, Gewirtz & Grossman, LLC: 332-239-2660

There is No Cost to You

We represent investors in class actions on a contingency fee basis. That means we will ask the court to reimburse us for out-of-pocket expenses and attorneys’ fees, usually a percentage of the total recovery, only if we are successful.

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Bronstein, Gewirtz & Grossman, LLC is a nationally recognized firm that represents investors in securities fraud class actions and shareholder derivative suits. Our firm has recovered hundreds of millions of dollars for investors nationwide.

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Contact

Bronstein, Gewirtz & Grossman, LLC
Peretz Bronstein or Nathan Miller
332-239-2660 | [email protected]