Reliance Industries Limited was formally incorporated in 1966 as Reliance Textiles and Engineers, Ltd. , tracing its origins to Dhirubhai Ambani's 1958 trading venture . Headquartered at Maker Chambers IV, Nariman Point, Mumbai, India , the conglomerate operates across energy, petrochemicals, natural gas, retail, telecommunications, entertainment, and textiles . Reliance is India's largest public company by market capitalisation and revenue , ranked #88 in the Fortune Global 500 and #45 in Forbes Global 2000 in 2025 . The company reported revenue of approximately $117.1 billion in 2025 , with Mukesh Ambani serving as Chairman and Managing Director .