Bill Ackman said that the chief executive of Nike apologized over a billboard that “made light of the Holocaust” by using the slogan “Never again” — though the apparel giant has not confirmed the billionaire hedge fund manager’s claim. “I spoke to Elliott Hill, CEO of @Nike who apologized for the gaffe,” Ackman wrote on X on Monday.

Nike faced backlash on Monday for allegedly making light of Holocaust with advertisement during the London Marathon over the weekend. The company has since apologized.