Ratan Tata is the former chairman of Tata Group, one of India's largest conglomerates. He was born in 1937 and took over as chairman of Tata Sons in 1991. Under his leadership, Tata Group's revenues grew manifold as he expanded the company globally through acquisitions like Tetley, Jaguar Land Rover, and Corus. Ratan Tata is renowned for his visionary leadership and transforming Tata into a global business. He retired as chairman in 2012 but remains involved through his roles as chairman emeritus of Tata Sons and various boards.