Constellation Software
| Company type | Public | 
|---|---|
| Industry | IT services | 
| Founded | 1995 | 
| Founders | Mark Leonard | 
| Headquarters | , | 
| Area served | Worldwide | 
| Key people | 
 | 
| Services | Custom Computer Programming Services | 
| Revenue | US$8.407 billion (2023) | 
| US$62 millions (2023) | |
| Total assets | US$10.899 billion (2023) | 
| Total equity | US$1.961 billion (2023) | 
| Number of employees | 56,000 | 
| Website | www | 
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 1995. It went public in 2006, and now has over 56,000 employees spread over six operating segments.