TORONTO, May 18 /CNW/ - Constellation Software Inc. (TSX:CSU) announced today it will host its first quarter conference call and live audio webcast on Tuesday, May 23, 2006 at 5 p.m. ET. Mark Leonard, Chairman and President and Barry Symons, Chief Financial Officer will discuss the Company's operating results and financial performance for the period ended March 31, 2006. The Company will release its results after market close on the day of the call. To access the call please dial 416-644-3421 or 1-800-814-4862. The webcast will be accessible at www.csisoftware.com. A replay of the conference call will be available as of 7 p.m. ET the same day until midnight, May 30, 2006. To access the replay please dial 416-640-1917 or 1-877-289-8525 followed by the passcode 21189453 followed by the number sign. About Constellation Software Inc. 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.