Mukesh Ambani-led Reliance Industries (RIL) has ended Indian Oil Corporation Limited’s 10-year reign as India’s largest company on Fortune India 500 list. With revenue of ₹5.81 lakh crore in 2018-19, the Mukesh Ambani-led conglomerate also became the first privately-held company to become India’s largest corporation, Fortune India said. ONGC was ranked third, the same as in 2018.