Calliditas Therapeutics AB clinical-stage biopharmaceutical company. It engages in the identification, development, and commercialization of novel treatments in orphan indications. The firm focuses on renal and hepatic diseases with significant unmet medical needs. It offers Nefecon, a proprietary, novel oral formulation of budesonide for the treatment of the autoimmune renal disease IgA nephropathy, or IgAN. The company was founded by Mikael Bender and Bengt Åke Julander on February 20, 2004 and is headquartered in Stockholm, Sweden.