Established as an oil marketing entity on June 30, 1959, Indian Oil Company Ltd was renamed Indian Oil Corporation Ltd (IOCL) on September 1, 1964, following its merger with Indian Refineries Ltd. The integrated refining and marketing entity has since grown into India’s largest commercial enterprise.

It is the country’s number one company in the prestigious Fortune ‘Global 500’ listing of the world’s largest corporates. IOCL is currently at the 85th position in the list.

IOCL has a strong workforce of over 34,000 employees. In the company, operations are strategically structured along the following verticals: Refineries, Pipelines, Marketing, R&D Centre and Business Development - E&P, Petrochemicals and Natural Gas.

It's world class research and development (R&D) centre, established in 1972, has state-of -the-art facilities and has delivered pioneering results in lubricants technology, refining process, pipeline transportation, bio-fuels and fuel-efficient appliances.

IOCL and its subsidiaries own and operate 10 of India’s 22 refineries, and its cross-country network of over 11,000 km of crude oil, product and gas pipelines is the largest in the country, meeting the vital energy needs of consumers in an efficient and environment-friendly manner.