ONGC

ONGC Videsh Limited :  overseas exploration and production activities.

Mangalore Refinery and Petrochemicals Limited (MRPL) : MRPL is a subsidiary of ONGC involved in the refining and marketing of petroleum products.

Petronet LNG Limited is joint venture between ONGC, Indian Oil Corporation Limited, Bharat Petroleum Croporation Limited.

ONGC Petro Additions Limited : It is a joint venture between ONGC, GAIL, and Gujarat State Petroleum Corporation (GSPC), engaged in petrochemical manufacturing.

Hindustan Petroleum Corporation Limited (HPCL): ONGC acquired a majority stake in HPCL, a leading oil refining and marketing company in India. ONGC acquired 51.11% in HPCL in 2018.

ONGC Tripura Power Company : It is a joint venture between ONGC, Infrastructure Leasing and Financial Services (IL&FS), and the Tripura government, involved in power generation.

ONGC Mittal Energy Limited : It is a joint venture between ONGC and Mittal Investments Sarl, focused on exploration and production activities.

ONGC Mangalore Petrochemicals Limited : It is a subsidiary of ONGC and MRPL, engaged in the production of petrochemicals.

ONGC Teri Biotech Limited : It is a joint venture between ONGC and The Energy and Resources Institute (TERI), working on biotechnology applications in the oil and gas industry.