On Holding lists 10 executives, led by David Allemann, Co-Founder, Co-CEO & Executive Co-Chairman (age 54). Frank Sluis is the company's Chief Financial Officer.
The average age of the executives with a known age is 54; the youngest is 48 and the oldest 57.
Titles, ages and pay from company filings.

Co-Founder, Co-CEO & Executive Co-Chairman
Co-Founder, Co-CEO & Executive Co-Chairman
President & COO
Co-Founder & Executive Director
Chief Financial Officer
Chief Technology Officer
Head of Investor Relations
General Counsel & Company Secretary
Chief Marketing Officer
Chief Human Resources Officer
David Allemann (Co-Founder, Co-CEO & Executive Co-Chairman), age 54.
Frank Sluis (Chief Financial Officer).
David Allemann (Co-Founder, Co-CEO & Executive Co-Chairman), Caspar Coppetti (Co-Founder, Co-CEO & Executive Co-Chairman), Scott Maguire (President & COO), Olivier Bernhard (Co-Founder & Executive Director) and Frank Sluis (Chief Financial Officer), and 5 more.