Reliance Industries was originally a single company founded by Dhirubhai Ambani that later split into two separate companies led by his sons Mukesh Ambani and Anil Ambani in 2005. Reliance Industries Limited, led by Mukesh Ambani, is India's largest private sector conglomerate operating in petroleum refining and marketing, petrochemicals, oil and gas exploration, and retail. It also has major subsidiaries and associates operating across various industries.