GSK completes acquisition of efimosfermin alfa from Boston Pharmaceuticals

GSK plc (GSK) announced the completion of its previously announced acquisition of efimosfermin alfa from Boston Pharmaceuticals. Efimosfermin is a Phase 3-ready, “potential best-in-class” investigational specialty medicine aimed at treating and preventing the progression of SLD. GSK has acquired BP Asset IX, Inc., a subsidiary of Boston Pharmaceuticals, to access efimosfermin. The total cash consideration for this acquisition amounts to up to $2B, comprising an upfront payment of $1.2B and up to $800M in success-based milestone payments. GSK will also be responsible for success-based milestone payments as well as tiered royalties for efimosfermin owed to Novartis Pharma AG (NVS), the company noted. “GSK, based on its work in human genetics and disease phenotyping, believes efimosfermin has potential to address more advanced stages of SLD due to its direct antifibrotic mechanism of action, and sees opportunity in combination with GSK’990, a siRNA therapeutic in development for other subsets of patients with SLD,” the company stated. Kaivan Khavandi, SVP & Global Head, Respiratory, Immunology & Inflammation R&D, GSK said: “The close of our acquisition for efimosfermin alfa represents a significant expansion of our hepatology pipeline aimed at addressing steatotic and viral drivers of liver disease. Efimosfermin is a key growth opportunity for GSK with multiple development options and potential first launch in 2029. We look forward to unlocking the potential of this medicine for patients.”