Coal India
 Coal India Limited (CIL) is an Indian state-controlled coal mining company headquartered in Kolkata West Bengal India. It is the largest coal producer company in the world and contributes around 81% of the coal production in India. It produced 452 million tonnes of coal during FY 2012–13 and earned a revenue of INR 882.81 billion from sale of coal in the same financial year. Union Government of India owns 61% of the shares in CIL and controls the operations of CIL through Ministry of Coal.