Osram Opto is a wholly owned subsidiary of Siemens AG and one of the two largest light source manufacturers in the world. Its headquarters is located in the German city of Munich. OSRAM opened production bases in Guangzhou, Foshan and Kunshan respectively in mainland China, nearly 40 sales offices in mainland China, nearly 8,000 employees in China and an office in Taiwan. Its subsidiary Foshan Electrical and Lighting Co., Ltd., a company listed in Shenzhen Stock Exchange.