In 2019, Roger Federer paid $50 million for a 3% stake in On; two years later, his stake was worth $300 million Nov 8, 2026 @ 4:01amTennisAthlon SportsThe stake later made Roger Federer a billionaire, then slipped him back below the mark. Read moreIn 2019, Roger Federer paid $50 million for a 3% stake in On; two years later, his stake was worth $300 million