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CSL strikes rare disease drug deal worth up to $1.6 billion with Swiss firm Alentis

By Thomson Reuters Oct 4, 2026 | 5:17 PM

Oct 5 (Reuters) – Australia’s CSL said on Monday it had entered into an agreement with Switzerland-based Alentis Therapeutics to co-develop ​and co-promote a treatment for rare ‌kidney and liver diseases, in a deal worth up to $1.6 billion before development funding.

Under the partnership, CSL will make an upfront payment of $355 million, while ‌Alentis ​is eligible for up to $1.2 ⁠billion in commercial milestone ⁠payments.

The deal gives the Australian biotech giant rights to jointly develop and commercialise lixudebart, a potential first-in-class treatment being studied for ​rare kidney and liver diseases.

Lixudebart, formerly known as ALE.F02, is currently in a ⁠Phase 2 trial for a ⁠rare autoimmune kidney disease that ​can cause irreversible kidney damage and end-stage renal ​disease.

The drug was granted orphan drug designation — ‌a special status granted by the US FDA to investigational therapies intended to prevent, diagnose, or treat rare diseases or conditions — for ⁠the treatment of idiopathic pulmonary fibrosis, or chronic lung disease, in 2024.

The companies also plan to advance ⁠the drug ‌as a potential treatment for ⁠focal segmental glomerulosclerosis (FSGS), a chronic kidney ​disease, ‌and primary sclerosing cholangitis (PSC), a chronic ​liver disease ⁠for which there is currently no approved therapy.

Once commercialised, global profits from the drug will be shared 55% to CSL and 45% to Alentis.

(Reporting by Rajasik Mukherjee in Bengaluru; Editing by ​Nia Williams)