M&A news

Swedish Orphan Biovitrum AB (publ) Acquires Arthrosi Therapeutics, Inc.

Arthrosi Therapeutics, Inc. acquired by Sobi - Swedish Orphan Biovitrum AB (publ)

AcquisitionUSD1,500,000,000Manufacturing

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Arthrosi Therapeutics, Inc. logo
Acquired

Arthrosi Therapeutics, Inc.

Pharmaceutical Manufacturing

Deal value

USD1,500,000,000

December 13, 2025

Sobi - Swedish Orphan Biovitrum AB (publ) logo
Acquirer

Sobi - Swedish Orphan Biovitrum AB (publ)

Pharmaceutical Manufacturing

Sobi - Swedish Orphan Biovitrum AB (publ) has acquired Arthrosi Therapeutics, Inc. for $1,500,000,000. Arthrosi Therapeutics is a leading clinical-stage biotech company dedicated to advancing therapies for gout disease. Its proprietary oral drug candidate, AR882, is currently in clinical Phase 3 development, demonstrating its advanced stage in the therapeutic pipeline. This transaction signifies Sobi's strategic expansion into a specific therapeutic area with a late-stage asset.

Arthrosi's AR882 has shown promising results, exhibiting unprecedented sustained urate lowering in gout patients and a reduction of tophi during clinical trials. This efficacy positions the drug with exceptional potential to treat millions of patients suffering from gout and tophaceous gout. Arthrosi Therapeutics has articulated a commitment to transforming the treatment landscape and improving the lives of patients worldwide through its innovative drug development.

For Sobi, this acquisition is strategically important as it adds a specialized, high-potential asset to its portfolio. Leveraging Sobi's established infrastructure and expertise in rare disease and specialty care, the integration of AR882 is expected to accelerate its final development and commercialization path. The synergy between Arthrosi's scientific innovation and Sobi's operational capabilities aims to expedite market access for a drug addressing a significant unmet medical need.

The combined entity is poised to make a substantial impact on the lives of gout patients globally by bringing AR882 to market efficiently. This acquisition underscores a shared vision to enhance treatment options and address chronic disease challenges. Looking forward, the integration is expected to strengthen Sobi's position in the biopharmaceutical sector, offering a specialized solution for a large and underserved patient population.

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