Citadel’s Ken Griffin buys a stegosaurus for $45 million in a record auction sale CNBCHedge fund billionaire Ken Griffin splurges $45m on VERY unusual purchase Daily MailT. Rex Dethroned? A Stegosaurus Fossil Sells for a Record $44.6 Million. The New York TimesStegosaurus Fossil Fetches Record-Breaking $44.6 Million At Auction IFLScienceBillionaire buys ‘finest stegosaurus specimen ever’ for $45 billion Quartz