NTPC Ltd is the largest power generating company in India both in terms of installed capacity and generated output. The company is engaged in the business of generation and sale of bulk power. NTPC had installed capacity of more than 51,000 megawatt (MW) at end December 2017. The NTPC group contributed 24% of the total power generation in India during financial year 2016-17. NTPC was ranked 400th in the 2016, Forbes Global 2000' ranking of the World's biggest companies. The Government of India held 62.28% stake in NTPC as on 31 December 2017. NTPC has two segments: generation and other business. Their other business includes providing consultancy, project management and supervision, oil and gas exploration, and coal mining.

The company operates their stations at a level of efficiency that exceeds the average in India, based upon availability factor and average plant load factor (PLF). They have developed a long term technology roadmap for the induction of high efficiency equipment, including supercritical and ultra-supercritical machines at their new plants. Their subsidiaries include NTPC Electric Supply Company Ltd, NTPC Hydro Ltd, NTPC Vidyut Vyapar Nigam Ltd, Pipavav Power Development Company Ltd, Kanti Bijlee Utpadan Nigam Ltd and Bhartiya Rail Bijlee Company Ltd.

NTPC