Hedge fund billionaire Ken Griffin closed a deal to buy the most expensive home ever sold in the U.S., paying around $238 million for a New York penthouse overlooking Central Park.

The deal is the largest in Griffin's recent $700 million global real estate shopping spree, believed to be the largest ever for a U.S. billionaire. Over the past few years, the founder and CEO of Citadel has purchased the most expensive homes in Chicago, Miami and New York. He has spent more than $200 million to buy land in Palm Beach, Florida, for a home he plans to build there. And this week, news broke that he purchased a $122 million property in London, which was the most expensive sale in that city in a decade.

A spokeswoman for Citadel couldn't immediately be reached for comment.