Roger Federer Stops Being a Billionaire After Drop in Footwear Brand Shares Forbes estimates that Federer owns a roughly 2.5% stake in On, a Swiss athletic footwear company Tennis legend Roger Federer is no longer a billionaire, according to Forbes estimates, after the fall in the share price of On Holding, a sporting goods company in which he has a stake. The shares plummeted on Tuesday morning (11), after the company released second quarter results below sales expectations Post navigation Porto is the stage for the closing of the Tour of Portugal by bike