View of the Ipsen logo at the company's headquarters in Boulogne-Billancourt near Paris, France, February 18, 2025.  REUTERS/Abdul Saboor
View of the Ipsen logo at the company's headquarters in Boulogne-Billancourt near Paris, France, February 18, 2025. REUTERS/Abdul Saboor
Home » News » Business & Economy » French biotech company Ipsen to buy Kartos Therapeutics for $450 million
Business & Economy

French biotech company Ipsen to buy Kartos Therapeutics for $450 million

June 29 (Reuters) – Ipsen will buy U.S.-based Kartos Therapeutics for $450 million to expand its oncology pipeline with a late-stage blood cancer treatment, the French biotech company said on Monday.

• The deal gives Ipsen navtemadlin, an investigational oral therapy being evaluated in a Phase III trial for patients with myelofibrosis, a rare blood cancer.

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• Kartos shareholders will be eligible for up to $1.3 billion in additional milestone payments tied to regulatory and sales targets.

• Initial trial data is expected in 2027, potentially paving the way for the therapy to be launched as early as 2028.

• Ipsen says the acquisition will boost core operating income from 2029.

• The deal is expected to close by the end of the third quarter of this year, subject to antitrust clearance.

(Reporting by Lucie Barbier and Margaux PerrinEditing by David Goodman)

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By Reuters | Reuters | © Copyright Thomson Reuters 2026.

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