Who principally owns the parent company of Hindustan Zinc Limited  ?
Hindustan Zinc Hindustan Zinc Limited (HZL) is an integrated mining and resources producer of zinc, lead, silver and cadmium. It is a subsidiary of Vedanta Resources PLC. HZL is the world's second largest zinc producer. Its FY2015 revenues were Rs. 147.9 billion.
Chugai Pharmaceutical Co. Chugai Pharmaceutical Co., Ltd. (中外製薬株式会社 , Chūgai Seiyaku Kabushikigaisha ) is a subsidiary drug manufacturer operating in Japan controlled by Hoffmann–La Roche, which owns 62% of the company as of 30 June 2014. Previous to Roche's takeover in 2002, Chugai was a pioneering discoverer of many important pharmaceutical compounds. The company is headquartered in Tokyo. Osamu Nagayama is the current representative director, chairman, and CEO. Tatsuro Kosaka is the current representative director, president, and COO.