The billionaire Ronald Perelman's lawsuit accusing New York City art gallery owner Larry Gagosian of defrauding him into overpaying for a Cy Twombly painting has been thrown out by a unanimous state appeals court.

Despite being a "sophisticated" plaintiff, Perelman "conducted no due diligence" to determine the value of Twombly's "Leaving Paphos Ringed With Waves" before agreeing to buy it for $10.5 million, the Manhattan court said on Thursday.