Born in Punjab, India, Gurbaksh Chahal is an Indian-American entrepreneur, philanthropist and author. He dropped out of high school in 1998 to work at his first venture, an advertising network called ClickAgents, which was bought by ValueClick (now known as Conversant) in 2000. In 2004, Chahal formed BlueLithium, which specialized in behavioral targeting of banner advertising. Yahoo bought BlueLithium in October 2007. In 2009, Chahal started his third company, now known as RadiumOne, from which he was fired after pleading guilty to misdemeanor battery charges in 2014. Chahal launched his fourth company, Gravity4, in July 2014.