Dawnrays Pharmaceutical Holdings Ltd. operates as an investment holding company, which engages in the development, manufacturing and selling of cephalosporin antibiotics, and various system specific medicines. It operates through Intermediates and Bulk Medicines and Finished Drugs. The Intermediates and Bulk Medicines segment engages in the manufacturing and selling of intermediates and bulk medicines. The Finished Drugs segment engages in the manufacturing and selling of antibiotics finished drugs and non-antibiotics finished drugs. The company was founded on December 8, 1995 and is headquartered in Hong Kong.