Citadel CEO Ken Griffin paid nearly $45M for a dinosaur skeleton at auction Fox BusinessBillionaire investor Ken Griffin pays $45 million for dinosaur fossil, shattering auction records FortuneLargest ever stegosaurus skeleton sold to billionaire Ken Griffin for $44.6M New York Post Citadel CEO Ken Griffin just bought a $45M dinosaur skeleton Business InsiderRecord-Setting Stegosaurus Sells for Nearly $45 Million at Sotheby’s Barron’s