Billionaire Mukesh Ambani-led RIL improved eight positions to grab the 19th position on the Platts Top 250 Global Energy Company Rankings for 2013.
ONGC held on its 22nd ranking, the position it had in 2012, while RIL improved from last time's 27th rank.
This year's list is topped by Exxon Mobil Corp, with Chevron Corp in second place.
Coal India improved its ranking from 48 to 43 while power utility NTPC went to 49th rank from 62 in 2012.
Dion Global Solutions Ltd