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illionaire hedge fund manager Ken Griffin has expanded his luxury real estate portfolio with the $45 million purchase of a duplex at 740 Park Ave., Manhattan's most prestigious co-op building. The property, previously owned by Julia Koch, widow of David Koch, was listed for over $60 million in early 2022 before being reduced to $48 million.

    Griffin, founder of Citadel, already owns a $238 million apartment at 220 Central Park South, widely considered Manhattan's top condo building. His latest acquisition cements his presence in the city's most exclusive residential enclaves, where high-profile figures like billionaire Ronald Lauder and former Treasury Secretary Steven Mnuchin reside.

    The prewar unit was originally purchased by the Kochs for $17 million in 2004. Griffin's global real estate holdings include a $122 million London mansion, an $84.45 million Hamptons estate, a record-breaking $107 million compound in Miami, and an extensive Palm Beach portfolio valued at over $1 billion.

    The sale was brokered by Corcoran's Leighton Candler, Bradley Comisar, and Jennifer Reardon. Griffin's real estate empire continues to grow with this latest addition, solidifying his position as a major player in the luxury property market.