Aptus Endosystems is a privately held, emerging medical device company that is engaged in the development of minimally invasive endograft devices. The company also offers delivery systems and fixation technology for the treatment of abdominal aortic aneurysms. Aptus Endosystems operates a more than 12,000-square-foot facility. The company performs an endovascular repair procedure that better approximates traditional open surgical repair. Aptus Endosystems has been operational since 2002 and is located in Sunnyvale, Calif.