Mark Leonard & family
$2.9B
Born
May 06, 1956
Age
69
Source of Wealth
Software
Residence
Toronto, Ontario
Citizenship
Canada
Marital Status
Children
0
Education
Master of Business Administration, The University of Western Ontario - Richard Ivey School of Business; Bachelor of Arts/Science, University of Guelph
- Mark Leonard founded Canadian tech company Constellation Software in 1995.
- Constellation Software, also known as CSI, acquires, manages and builds software businesses.
- Leonard and members of his family own an estimated 7% of the company, which is listed on the Toronto Stock Exchange.
- He was Constellation's president until stepping down in October 2025. He remains on the board.
- After getting an MBA from the University of Western Ontario, Leonard worked in venture capital for 11 years.
- There are few known photos of the elusive billionaire, who has never talked to the press.
- According to Canada's Globe and Mail, Leonard worked "as a banker, valuator, mason, gravedigger, dog handler, bouncer, sapper, and wind energy researcher."
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