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Entity Subsidiaries

: Oil and Natural Gas Corporation Limited

Subsidiary	Percentage	From	To
Hindustan Petroleum Corporation Limited	51.11%	12/2000	12/2050
Mangalore Refinery and Petrochemicals Limited	72.00%	01/2000	12/2050
ONGC Mangalore Petrochemicals Limited	49.00%	12/2006	12/2050
ONGC Petro additions Ltd (OPaL)	49.36%	03/2017	12/2050