Oil and Natural Gas Corporation Limited (ONGC) is India's largest crude oil and natural gas company, significantly contributing to the country's energy security with about 71% of domestic hydrocarbon production. As a Maharatna company under the Ministry of Petroleum and Natural Gas, ONGC employs around 26,000 professionals and operates across the entire hydrocarbon value chain, focusing on exploration and production both domestically and internationally through its subsidiary, ONGC Videsh Limited.

ONGC produces crude oil and natural gas, supplying major Indian refining and marketing companies. It also offers value-added products like LPG, naphtha, and kerosene. The company has downstream interests through Mangalore Refinery and Petrochemicals Limited and ONGC Petro Additions Limited, which operate refineries and petrochemical complexes. With advanced techniques for maximizing extraction efficiency, ONGC manages extensive infrastructure, including seismic teams, drilling rigs, and pipelines. Its operations extend globally, enhancing its role in meeting India's energy demands and supporting economic growth.