Harj Taggar is an entrepreneur, investor, and Managing Partner at Y Combinator. He began his entrepreneurial journey after leaving the University of Oxford's law school in 2006 to move to Silicon Valley. In 2007, Taggar co-founded Auctomatic, a platform designed to help online sellers manage auctions and marketplace listings. He co-founded the company with his brother Kulveer, Patrick Collison, and John Collison.