Citadel founder Ken Griffin buys huge stegosaurus skeleton for $44.6 million MarketWatchThe Woman Who Sold the World’s Most Expensive Dinosaur The New York TimesHere’s who bought the record-setting “Apex” Stegosaurus for $45 million CBS NewsCitadel’s Ken Griffin buys a stegosaurus for $45 million in a record auction sale CNBCBillionaire investor Ken Griffin pays $45 million for dinosaur fossil, shattering auction records Fortune