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.
Hindustan Organic Chemicals Limited Hindustan Organic Chemicals Limited (HOCL) is Government of India owned company based in Mumbai, Maharashtra. It was established in 1960 to indigenise manufacture of basic chemicals and to reduce country’s dependence on import of vital organic chemicals. Its products are Phenol, Acetone, Nitrobenzene, Aniline, Nitrotoluenes, Chlorobenzenes & Nitrochlorobenzenes. Basic Organic Chemicals includes Pesticides, Drugs & Pharmaceuticals, Dyes & Dyestuffs, Plastics, Resins & Laminates, Rubber Chemicals, Paints, Textile Auxiliaries & Explosives.