Swedish Orphan Biovitrum AB is an international biopharmaceutical company dedicated to treatments in the areas of haematology, immunology and specialty care, based in Stockholm, Sweden. In 2020 it had a revenue of SEK 15.261 billion and 1,509 employees. History Sobi traces its origins to a subsidiary of Kärnbolaget Aktiebolag Biokemisk Industri in the 1930s, which changed its name to in 1951 and merged with to become KabiVitrum in the 1970s. Sobi has been involved in the process development and manufacturing of recombinant protein drugs since the technology was first developed around 30 years ago, then as part of KabiVitrum. Biovitrum was formed in 2001 through the merger of several units of Pharmacia (now Pfizer) and spun off to a consortium of investors led by Nordic Capital and MPM Capital Funds. Operations included a research unit focused on metabolic diseases, a process development unit for protein drugs and a plasma product operation. In 2002 Sobi sold its plasma operation to Octapharma as part of efforts to concentrate operations on protein-based and small molecular drugs. In 2004, Biovitrum started to manufacture the active protein component for Wyeth’s (now Pfizer’s) ReFacto® and ReFacto/Xyntha® drugs for treatment of hemophilia, and marketing of specialty pharmaceuticals (ReFacto, Mimpara and Kineret®) was initiated in the Nordic region. In 2005, the research and development portfolio was expanded through the acquisition of Arexis, a Swedish biotech company, and the following year a partnership was formed with Syntonix (subsequently Biogen Idec) to jointly develop a drug for hemophilia B, a long-lasting recombinant factor IX Fc fusion protein candidate, rFIXFc. This partnership was extended the following year to also include the development of a long-lasting recombinant factor VIII Fc fusion protein candidate, rFVIIIFc, for the treatment of hemophilia A. In 2008, an agreement with Amgen regarding the acquisition of the products Kepivance and Stemgen as well as a global license for Kineret was signed In 2009, Sobi and partner Biogen Idec took the decision to enter final registration studies for the recombinant factor FIXFc. The company also received positive data regarding its Kiobrina phase II program, an investigational enzyme replacement therapy to improve growth in preterm infants who receive pasteurized breast milk or infant formula. In 2010, Biovitrum acquired Swedish Orphan International Holding AB, a pioneer in orphan drugs, and Swedish Orphan Biovitrum AB (publ) was formed. In addition, the decisions to advance both hemophilia projects as well as Kiobrina into