Reliance Industries Limited engages in the hydrocarbon exploration and production, petroleum refining and marketing, petrochemicals, retail, digital, and financial services worldwide.
Oil and Natural Gas Corporation Limited explores for, develops, and produces crude oil and natural gas in India and internationally.
Indian Oil Corporation Limited, together with its subsidiaries, engages in the refining, pipeline transportation, and marketing of petroleum products in India.
Bharat Petroleum Corporation Limited refines crude oil and markets petroleum products in India.
Coal India Limited, together with its subsidiaries, produces and sells coal worldwide.
Petronet LNG Limited engages in the import, regasification, and supply of liquefied natural gas (LNG) in India.
Hindustan Petroleum Corporation Limited refines and markets petroleum products in India and internationally.
Oil India Limited explores for, develops, and produces crude oil and natural gas in India and internationally.
Aegis Logistics Limited, together with its subsidiaries, operates as an oil, gas, and chemical logistics company in the downstream oil and gas sector primarily in India.
Mangalore Refinery and Petrochemicals Limited manufactures and sells refined petroleum products in India.
India Infrastructure Trust, an infrastructure investment trust, engages in the transportation of natural gas in India.
The Great Eastern Shipping Company Limited, through its subsidiaries, engages in the shipping and offshore oilfield businesses in India and internationally.
Gujarat Mineral Development Corporation Limited engages in mining business in India.
Chennai Petroleum Corporation Limited produces and sells petroleum products in India.
Seamec Limited owns and operates multi support vessels for providing support services to offshore oilfields in India and internationally.
Hindustan Oil Exploration Company Limited engages in the exploration, development, and production of onshore and offshore crude oil and natural gas in India.
United Drilling Tools Limited manufactures and sells wire line and well service equipment, gas lift equipment, downhole tools, and OD casing pipes and connectors worldwide.
Reliance Industrial Infrastructure Limited engages in setting up/operating industrial infrastructure in India.
Asian Energy Services Limited, an oilfield service and reservoir imaging company, provides a suite of geophysical services related to land and well seismic services in India and internationally.
Jindal Drilling & Industries Limited provides drilling services to the oil and gas sector in India.
GP Petroleums Limited engages in formulating, manufacturing, and marketing industrial and automotive lubricants, process oils, transformer oils, greases, and other specialties in India and internationally.
Essar Shipping Limited provides sea transportation and contract drilling services in India, Singapore, Cyprus, the United Arab Emirates, and the United Kingdom.
Selan Exploration Technology Limited explores for and produces crude oil and natural gas in India.