Pharma Stock Roundup: LLY's New Deal, GSK & SNY's Pipeline Updates

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This week, Eli Lilly LLY announced plans to acquire SiteOne Therapeutics to expand its pain pipeline. Moderna MRNA announced that the U.S. Department of Health and Human Services (“HHS”) has terminated the award for the late-stage development of its H5 avian flu vaccine. GSK plc GSK and Sanofi SNY announced pipeline data. Merck MRK and Japan’s Daiichi Sankyo voluntarily withdrew their regulatory application seeking approval for their HER3-directed antibody-drug conjugate, patritumab deruxtecan, in the United States.

Here's a recap of the week’s most important stories.

Lilly to Acquire SiteOne Therapeutics in $1B Deal

Lilly announced a definitive agreement to acquire private biotech, SiteOne Therapeutics, which will add novel non-opioid medicines for pain management to its pipeline portfolio. SiteOne Therapeutics makes small-molecule inhibitors of sodium channels to treat pain and other neuronal hyperexcitability disorders. Its lead pipeline candidate is STC-004, a phase II ready Nav1.8 inhibitor being studied for the treatment of pain. For the deal, Lilly will make a payment of up to $1.0 billion in cash, which includes an upfront payment and subsequent milestone payments.

Phase III Study on GSK/SPRO’s Oral Antibiotic Stopped Early for Efficacy

GSK and partner Spero Therapeutics announced that a phase III study on their oral antibiotic candidate, tebipenem HBr for the potential treatment of complicated urinary tract infections (cUTIs), was stopped early for efficacy. The decision followed a review by an Independent Data Monitoring Committee, based on a planned interim analysis of data from the phase III PIVOT-PO study on tebipenem HBr. The study met the primary endpoint of non-inferiority of tebipenem HBr compared to intravenous imipenem-cilastatin in hospitalized adult patients with cUTI.

If approved by the FDA, tebipenem HBr will become the first oral carbapenem antibiotic treatment for cUTI, providing patients a novel alternative to hospital-based intravenous treatment. Carbapenem antibiotics are the standard of care treatments for cUTI, which can at present only be administered via IV administration.

The companies plan to file a regulatory application to the FDA in the second half of 2025, which will include the latest data from the PIVOT-PO study.

The European Medicines Agency’s Committee for Medicinal Products for Human Use gave a positive opinion recommending approval for the Blenrep (belantamab mafodotin) combination therapy to treat relapsed or refractory multiple myeloma. European Commission’s decision on the regulatory application is expected in the third quarter of 2025.