Mukesh Ambani's wealth has reached $101.8 billion as shares of Reliance Industries Ltd rise. He is now the 12th richest person in the world and owns 42% of the company. Ambani's rise in wealth has been steadier than that of Gautam Adani. Ambani, 66, has helped build Reliance into India’s largest company by market value. In recent years, the business has diversified beyond its fossil-fuel origins toward technology and renewable energy. While Jio shares have only gained about 1% since going public in August, the company remains India’s third-largest shadow lender by market value.