Constellation Acquires the Shares of GROUPE PCMS

TORONTO, ONTARIO--(Marketwire - Jan. 23, 2013) - Constellation Software Inc. ("Constellation") (TSX:CSU), announced today that it has completed, through its wholly-owned subsidiary N. Harris Computer Corporation ("Harris"), the acquisition of Montreal based Groupe PCMS ("PCMS").

Daniel Desaulniers, Group President of Harris Quebec and Healthcare, stated, "This acquisition allows us to significantly enhance our human resource information suite ('HRIS'). Along with other PCMS products, the RH INO suite (www.rh-ino.com/en) improves our already successful HRIS offering for the Quebec market. We are very pleased to welcome the new employees and customers to our company.

Pierre Marc Charron, President of PCMS, commented, "Given the considerable consolidation and challenge that has taken place in the Quebec software market, it is time that our company engaged in similar consolidation in order to better match the size of the organizations we serve. The sale of our PCMS to Harris will create a strong business solution partner for our customers and allow the company to achieve its full potential".

About Constellation Software Inc.

Constellation's common shares are listed on the Toronto Stock Exchange under the symbol "CSU". Constellation Software is an international provider of market leading software and services to a number of industries across both the public and private sectors. The Company acquires, manages and builds vertical market software businesses that provide mission-critical software solutions. Further information about Constellation may be obtained from its website at www.csisoftware.com.

About N. Harris Computer Corporation

Harris is a leading provider of financial management and Customer Information Systems (CIS) software solutions. Since 1976, Harris has focused on providing feature-rich and robust turnkey solutions to Public Sector, Schools, Utility, and Healthcare agencies throughout North America. Harris' focus is on creating long-term relationships with its customers and ensuring that it meets the changing needs of its customers over time. Further information about Harris may be obtained from its website at www.harriscomputer.com.

About Groupe PCMS

Created in 1997, the group's reputation developed around our software expertise in managing absenteeism. Implemented in over 200 locations in Quebec, our solutions now manage in excess of 250,000 employees in Quebec's health network, school boards and private organizations, employing between 200 and 9,000 employees. Groupe PCMS has two divisions: pcmsconseil and pcmslab. pcmsconseil ensures the delivery of quality integrated services and pcmslab, the continuity in developing creative solutions. To learn more about Groupe PCMS visit us online at www.pcms.com.