Arthrosi Therapeutics is headquartered in San Diego, CA, and is focused on developing pozdeutinurad, a potentially best-in-class, highly potent and selective next generation URAT1 inhibitor to reduce serum urate levels, flares and tophi in patients with progressive gout. The rights to pozdeutinurad in Greater China are held by ApicHope.

The acquisition strengthens Sobi’s gout franchise by adding pozdeutinurad (AR882), an investigational next-generation, once-daily oral URAT1 inhibitor currently being evaluated in two fully recruited global Phase 3 clinical studies for the potential management of progressive and tophaceous gout and expected to read out in 2026. Pozdeutinurad complements Sobi’s pipeline by adding a potentially best-in-class URAT1 inhibitor for patients sub-optimally treated with first-line therapies, the company states.

“The acquisition of Arthrosi allows us to expand our gout pipeline with a highly differentiated new asset”, says Guido Oelkers, President and CEO of Sobi. “Pozdeutinurad has the potential to become the therapy of choice for patients who have progressive gout with persistent and unresolved symptoms despite first-line therapy. The product has the potential to materially accelerate our growth until the mid 2030s, and beyond. We welcome all members of the talented Arthrosi team and are looking forward to working closely together to be able to offer this therapy to patients as soon as possible.”

The transaction is subject to the satisfaction of customary closing conditions and is expected to close in H1 2026.

Sobi plans to fund the upfront payment mainly through debt in the form of existing credit facilities and a new credit facility provided by Handelsbanken and Danske Bank.