Leidos Biomedical Research, Inc., part of Leidos Holdings, Inc., is an American company located in Reston, VA. The firm engages in cancer research.\nThe company says this about itself: Leidos is a Fortune 500�� science and technology solutions and services leader working to solve the world's toughest challenges in the defense, intelligence, homeland security, civil, and health markets. The company's 32,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Virginia, Leidos reported annual revenues of approximately $7.04 billion for the fiscal year ended December 30, 2016.