Oil & Natural Gas Corporation Ltd.

ONGC, state-owned exploration and production major, has become the country's most-valued company with market capitalization of over Rs 2.86 lakh crore. The company has surpass Tata Group's software services company TCS.

On April 18, 2013 the company commanded a market value of Rs 286,223 crore, the highest for any listed company in India. This is about Rs 2,289 crore more than TCS' market capitalization of Rs 283,934 crore. Shares of ONGC ended 1.73% higher, while shares of TCS dipped 0.58% at the end of day's trade.

ONGC is a premier oil and gas company in India, accounting for 71% of the country’s crude oil production and 54% of its natural gas production in 2011-12. It is also a significant producer of value added products such as liquefied petroleum gas (LPG), superior kerosene oil (SKO), and naphtha. GoI is the majority shareholder in ONGC, with a 69% equity stake as of now.