Constellation Software is a Canadian diversified software company. It is based in Toronto, Canada, is listed on the Toronto Stock Exchange, and is a constituent of the S&P/TSX 60.

The company was founded by Mark Leonard, a former venture capitalist, in 1996. It went public in 2006, and now has 13,000 employees spread over 6 operating segments.

Traded as:           TSX: CSU;     S&P/TSX 60 component

Industry:              IT services

Founded:            1995; 25 years ago

Founders:           Mark Leonard

Headquarters:   Toronto, Ontario, Canada

Services:              Custom Computer Programming Services

Website:              www.csisoftware.com