Toronto, Canada, March 18, 2015 — Constellation Software Inc. (“Constellation”) (TSX: CSU) today announces the ex-dividend date for the quarterly dividend payable on April 3, 2015. In a press release dated February 25, 2015 the record date was set to March 18, 2015. Due to a late notification to the Toronto Stock Exchange, the ex-dividend date for this dividend will be March 19, 2015. The dividend will be paid on April 3, 2015.

For more information please contact Jamal Baksh at (416) 861-9677.

About Constellation Software Inc.

Constellation’s common shares are listed on the Toronto Stock Exchange under the symbol “CSU”. Constellation acquires, manages and builds vertical market software businesses.

For further information, contact:

Jamal Baksh

Chief Financial Officer

(416) 861-9677

info@csisoftware.com

www.www.csisoftware.com

March 18th 2015

About Constellation Software Inc.

Constellation Software acquires, manages and builds vertical market software businesses.

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