Low-profile member of the sprawling Raheja property clan built a separate diversified empire that includes interests in cement, tiles and batteries. A revival in the auto sector recharged shares of his Exide Industries, which has two-thirds of the market for auto batteries and today accounts for close to half of his fortune. Exide's insurance arm is likely to benefit from a new rule raising the cap on foreign ownership in insurance companies from 26 to 49 percent.