Son of a high school principal, Infosys co-founder K Dinesh was a director of the company for three decades, from its founding in 1981 to 2011 when he stepped down; he continues to hold a minority stake. These days, he and his wife back various social causes and support social entrepreneurs in the area of health care and education. He sits on the board of hospital chain Narayana Health, and is also a patron of the Association of Healthcare Providers (India).
Fast Fact: At a recent Silicon Valley conference, he said the biggest challenge for Infosys today is "how to keep a humble culture when you have an embarrassment of riches".