Billionaire Ken Griffin has added to his pricey real-estate roster.
Griffin, the founder of the hedge fund Citadel, has reportedly acquired the most expensive U.S. home ever, a penthouse in New York that sold for about $238 million, according to The Wall Street Journal.
The apartment, which is within the 220 Central Park high-rise and measures about 24,000 square feet, was purchased by Griffin in 2015, the Journal says.

Ken Griffin
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