Alexion Pharmaceuticals, Inc. (Alexion) is a biopharmaceutical company focused on serving patients with severe and ultra-rare disorders through the development and commercialization of life-transforming therapeutic products. Its marketed product Soliris (eculizumab) is the first and only therapeutic approved for patients with two ultra-rare and severe disorders resulting from chronic uncontrolled activation of the complement component of the immune system: paroxysmal nocturnal hemoglobinuria (PNH), an ultra-rare and life-threatening blood disorder, and atypical hemolytic uremic syndrome (aHUS), an ultra-rare and life-threatening genetic disease. On February 7, 2012, it acquired Enobia Pharma Corp. (Enobia). On February 8, 2011, it acquired patents and assets from Orphatec Pharmaceuticals GmbH (Orphatec). On January 28, 2011, it acquired Taligen Therapeutics, Inc. (Taligen). It acquired Asfotase alfa in February 2012.