Calliditas Therapeutics AB (publ), a commercial-stage bio-pharmaceutical company, focused on identifying, developing, and commercializing novel treatments in orphan indications with an initial focus on renal and hepatic diseases with significant unmet medical needs in the United States, Europe, and Asia. It offers Nefecon (TARPEYO/Kinpeygo), an oral formulation of budesonide to reduce the loss of kidney function in adults with immunoglobulin A nephropathy. The company's lead compound is Setanaxib, a NOX inhibitor that is in Phase 2b clinical trial for the treatment of primary biliary cholangitis; and in Phase 2 clinical trial for the treatment of squamous cell carcinoma of the head and neck cancer and idiopathic pulmonary fibrosis, as well as for solid tumors and Alport Syndrome. Calliditas Therapeutics AB (publ) was incorporated in 2004 and is headquartered in Stockholm, Sweden. As of September 13, 2024, Calliditas Therapeutics AB (publ) operates as a subsidiary of Asahi Kasei Corporation.