Indian Oil Corporation Limited (IOCL) commonly known as IndianOil is an Indian state owned oil and gas company headquartered in New Delhi. It is the largest commercial enterprise in the country, with a net profit of INR 19,106 crore (USD 2,848 million) for the financial year 2016–17.

The Subsidiaries of the Indian Oil Corporation Limited is given below

Indian Subsidiaries
Chennai Petroleum Corporation Limited
Refining of petroleum products

IndianOil - CREDA Biofuels Limited
Plantation of Jatropha and extraction of oil for Bio-diesels

Indian Catalyst Private Limited
Manufacturing of FCC catalyst / additive

Foreign Subsidiaries
IndianOil (Mauritius) Ltd. Mauritius Terminalling, Retailing & Aviation refuelling

Lanka IOC PLC,Sri Lanka
Retailing, Terminalling & Bunkering
IOC Middle East FZE, UAE Lube blending & marketing of lubricants

IOC Sweden AB, Sweden
Investment company for E&P Project in Venezuela

IOCL (USA) Inc., USA
Participation in Shale Gas Asset Project

IndOil Global B.V. Netherlands
Exploration & Production