Ratan Tata, the former Tata Group chairman who transformed a staid and sprawling Indian conglomerate into a global powerhouse with a string of high-profile acquisitions, has died at the age of 86. Ratan Tata, the former Tata Group chairman who transformed a staid and sprawling Indian conglomerate into a global powerhouse with a string of high-profile acquisitions, has died at the age of 86. Businesses, Community and Society, Government and Politics Latest business news