The Citadel founder paid $45 million for a duplex at 740 Park Ave. that had been owned by Julia Koch, the widow of billionaire businessman David Koch, according to people familiar with the matter.

Hollywood power couple Colin Jost and Scarlett Johansson have scored a deal on a Park Avenue co-op. The pair bought Penthouse ...

And more than a few residents have been the subjects of tabloid scandals. 740 Park was once home to one of the world's largest private collections of Mark Rothko works. The former owner ...

Photo is of a home recently listed at 740 Park; not owner's actual residence Not all residents are in finance. Fashion designer Vera Wang paid $23.1 million for her father's residence at 740 Park ...

Now, he’s added yet another trophy to his real-estate holdings: a duplex at New York’s most storied cooperative, 740 Park Avenue.

The Citadel founder paid US$45mil for a duplex at 740 Park Ave that had been owned by Julia Koch, the widow of billionaire businessman David Koch, according to people familiar with the matter.

Ken Griffin spent $45 million on a duplex in Manhattan's 740 Park Avenue.STAN HONDA/Getty Images Billionaire Ken Griffin bought a duplex in Manhattan for $45 million. Griffin owns over a quarter ...