It's the only race that seems to matter between the Ambani brothers, the race to riches. Mukesh's Reliance Industries is India's most valuable company by a long shot. The stock price has doubled in one year and 31 per cent in the last month, making Mukesh's share worth Rs 1,58,000 crore. Add to that his shares in Reliance Petroleum, which has surged more than 130 per cent in a year and more than 45 per cent in a month, adding another Rs 1,045 crore to his kitty.