Ratan Tata, who has a $1 billion net worth, is the chairman of the Tata Group and several other significant Tata businesses.
Ratan Tata's tenure at Tata Sons has contributed to his wealth.
He began by sifting limestone and taking care of the blast furnace on the ground level in Jamshedpur.
He was appointed Director of NELCO in 1971, while the company was struggling.
He was able to increase the market share by 23%, but the economic and labour problems caused the business to swiftly go into decline.
He assisted in turning around the Empress Mills, but when he was denied the Rs 50 lakh he required, the business struck rock bottom and was closed in 1986.
Following JRD Tata's resignation in 1981, Ratan assumed control of Tata Industries and later rose to the post of global chairman of the Tata group.