Compusource Corporation acquired by Constellation Software Inc.


Constellation Software Inc.

Toronto, Canada, August 7, 2009 — Constellation Software Inc. (“Constellation”) (TSX: CSU)
announced today that it has completed, through its wholly-owned subsidiary Jonas Software,
(“Jonas”) the acquisition of Compusource Corporation. (“Compusource”) of La Palma, CA. The acquisition of Compusource further strengthens Jonas” position in the construction market and represents its entry into the Moving & Storage and Metal Service Center verticals.

“The addition of Compusource provides us with a number of market leading products that will help us further our growth objectives” said Will Anderson, General Manager, of the Jonas Construction Division. “We look forward to working with the Compusource team to continue to enhance their product and service offerings.”

Compusource Founder, Chairman and CEO David Roberts commented, “For over 35 years we have been providing excellent software systems and support to specific vertical markets. We believe that joining the Jonas team will not only maintain that record of success, but provide an opportunity to grow and improve our products and service.”

About Constellation:
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 to address the specific needs of its customers in those industries.

About Jonas:
Jonas is a leading provider of enterprise management software solutions to the Club, Foodservices and Construction Management industries. Jonas has over 7,000 customers, in over 15 countries worldwide. Jonas employs over 350 individuals consisting of a cross-section of industry experts and technology professionals.

About Compusource:
Founded in 1971, Compusource has evolved into a leading developer and marketer of application software, computer equipment, and training/support programs for the Moving & Storage, Metal Center and Construction industries. In partnership with their customers Compusource has achieved success through a central focus is on building long-term mutually beneficial relationships. Headquartered in La Palma, CA, with an Eastern Regional Office in Norcross, GA and a Southwestern Regional Office in Carrollton, TX., Compusource employs trained professionals that provide prompt and comprehensive support to clients throughout North America.

Forward Looking Statements

Certain statements herein may be “forward looking” statements that involve known and unknown risks, uncertainties and other factors that may cause the actual results, performance or achievements of Constellation or the industry to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. These statements reflect current assumptions and expectations regarding future events and operating performance and speak only as of the date hereof. Forward looking statements involve significant risks and uncertainties, should not be read as guarantees of future performance or results, and will not necessarily be accurate indications of whether or not such results will be achieved. A number of factors could cause actual results to vary significantly from the results discussed in the forward looking statements. These forward looking statements are made as of the date hereof and Constellation assumes no obligation to update any forward looking statements to reflect new events or circumstances.

For further information, contact:
John Billowits
Chief Financial Officer
(416) 861-2279
info@csisoftware.com
www.csisoftware.com