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 ...

He donated $8 million a few years ago. Billionaire Ken Griffin, the CEO of Miami-based Citadel, has boosted his gift to the Cox Science Center and Aquarium in West Palm Beach by $5 million.

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.

Ken Griffin is officially one property away from washing his hands of Chicago. The billionaire Citadel founder is close to wrapping up his Chicago selling spree with the offloading of two more ...

Gifting allows recipients to access the article for free. Billionaire Ken Griffin completed his sell-off of the top floors at No. 9 Walton yesterday, selling two penthouse floors for a combined ...

In February, high-end Miami Beach, Fla., real-estate agents buzzed that billionaire hedge-fund manager Ken Griffin had purchased the longtime Star Island home of Russian-born hospitality magnate ...

Billionaire Ken Griffin said President Donald Trump's latest tariffs amount to a hefty tax on families and are a "huge policy mistake." Griffin, a Republican mega-donor, isn't the only Wall Street ...

Ken Griffin’s losses on luxury Chicago real estate expanded to almost $30 million with sales of the final two floors out of the four he assembled within the No. 9 West Walton Street condo tower.