Constellation Software Inc. is a Canadian vertical market software company headquartered in Toronto, Ontario. It is listed on the Toronto Stock Exchange under the ticker CSU and is a constituent of the S&P/TSX 60. The company was founded in 1995 by Mark Leonard, a former venture capitalist, and went public in 2006. Its core strategy is the acquisition and permanent ownership of vertical market software businesses — software companies servicing a specific industry niche rather than a horizontal market. Since its founding, Constellation has acquired over 850 businesses across more than 100 industry vertical worldwide. Constellation is widely studied by investors and capital allocators for its disciplined, decentralized acquisition model and its long-term compounding track record. Since its IPO, the stock has compounded at approximately 30% per annum. Wikipedia