Portrait of Mark Leonard & family

Rank #1401

Mark Leonard & family

Net worth $3.0B

Software · Canada

Born
May 06, 1956
Age
70
Source
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

Net worth over time

Biography

  • 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."

Financial assets

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