Griffin's new apartment unit spans 8,500 sq ft on the fourth and fifth floors of 740 Park Ave.
NEW YORK: Billionaire Ken Griffin has added another luxury home to his collection, buying an apartment in one of Manhattan’s most exclusive co-op buildings.
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.
