Daiichi Sankyo Co., Ltd. engages in the research, development, manufacture, and sale of pharmaceuticals. The company is headquartered in Chuo-Ku, Tokyo-To and currently employs 19,765 full-time employees. The company went IPO on 2005-09-28. The firm is involved in the research, development, manufacture and sale of pharmaceuticals, as well as the provision of intermediates and basic materials for pharmaceutical producing in Japan, the United States, Europe and other markets. The firm is also engaged in the research, development, manufacture and sale of over-the-counter drugs and vaccines, the provision of administrative services such as human resources and accounting services, real estate leasing and insurance agency business.