Calliditas Therapeutics AB (publ), a commercial-stage specialty pharmaceutical company, focused on identifying, developing, and commercializing pharmaceuticals products for treatments in orphan indications with initial focus on renal and hepatic diseases. It offers Nefecon, an oral formulation of budesonide that is an immunosuppressant for the treatment of the autoimmune renal disease immunoglobulin A nephropathy. The company's lead product candidate is Setanaxib, a NOX inhibitor that is in Phase 2b/3 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 type 1 diabetic kidney disease. It also develops Budenofalk 3 mg oral capsules for the treatment of autoimmune hepatitis. The company was founded in 2004 and is headquartered in Stockholm, Sweden.