Ken Griffin has left the building. The formerly Chicago-based billionaire on Tuesday sold his final two unfinished, full-floor condominiums in the building at 9 W. Walton St. on the Gold Coast for ...

The billionaire founder of Citadel offloaded his holdings within No. 9 West Walton Street, getting closer to completing a ...

Billionaire developer Ken Griffin has pledged another $5 million toward the Cox Science Center and Aquarium's expansion, raising his total contributions to $13 million, the center announced Friday.

Known more commonly as Ken Griffin, Kenneth Cordele Griffin was born in 1968. His interest in finance began early, and while still a student, he started investing from his Harvard dorm room. In 1986, ...

Known more commonly as Ken Griffin, Kenneth Cordele Griffin was born in 1968. His interest in finance began early, and while still a student, he started investing from his Harvard dorm room. In 1986, ...