Ken Griffin is the Chief Executive Officer and Co-Chief Investment Officer of Citadel, a leading hedge fund firm he founded in 1990. A then-19-year-old sophomore at Harvard University, Griffin started trading from his dorm room with a fax machine, a personal computer, and a telephone. He put a satellite dish on the roof to get real-time stock quotes. Today, he serves as one of the major options specialists and retail equity market makers in the United States. Griffin is also a passionate philanthropist, supporting educational and cultural causes that drive community engagement and improvement.