Constellation Software Inc.TSX: CSU

Certain Officers and Directors of Constellation Software Establish Automatic Share Purchase and Disposition Program

· Issued by Constellation Software Inc. via CNW

TORONTO, Dec. 15 /CNW/ - Constellation Software Inc. ("Constellation") (TSX: CSU) today announced that it has been advised that eight of its officers and directors have each entered into agreements with a brokerage firm to adopt automatic share purchase and disposition plans in accordance with applicable securities laws. The plans allow for the purchase and disposition of Constellation common shares in a systematic manner based upon pre-determined criteria. Details regarding the plans adopted by officers and directors are contained in the table below.

Proposed Purchases
                                   Transaction   No. of    Limit
Name            Office                  Period   shares    price
----------------------------------------------------------------
Mark Leonard    President,       April 1, 07 -   20,000  $ 17.50
                 Constellation    April 30, 07
                 Software Inc.
Mark Leonard    President,        May 1, 07 -    20,000  $ 17.25
                 Constellation     May 31, 07
                 Software Inc.
Mark Leonard    President,       June 1, 07 -    20,000  $ 17.50
                 Constellation    June 30, 07
                 Software Inc.
Mark Leonard    President,       July 1, 07 -    20,000  $ 17.75
                 Constellation    July 31, 07
                 Software Inc.
Mark Leonard    President,        Aug 1, 07 -    20,000  $ 18.00
                 Constellation     Aug 31, 07
                 Software Inc.
Mark Leonard    President,       Sept 1, 07 -    20,000  $ 18.25
                 Constellation    Sept 30, 07
                 Software Inc.
Mark Leonard    President,        Oct 1, 07 -    20,000  $ 18.50
                 Constellation     Oct 31, 07
                 Software Inc.
Mark Leonard    President,        Nov 1, 07 -    20,000  $ 18.75
                 Constellation     Nov 30, 07
                 Software Inc.
Mark Leonard    President,        Dec 1, 07 -    20,000  $ 19.25
                 Constellation     Dec 31, 07
                 Software Inc.
Stephen         Director,         Jan 1, 07 -    25,000  $ 21.00
 Scotchmer       Constellation     Mar 30, 07
                 Software Inc.
Dexter Salna    President,        Dec 15, 06 -   30,000  $ 20.00
                 Constellation     Dec 15, 07
                 Homebuilder
                 Systems Inc.


Proposed Dispositions
                                                               % of total
                                   Transaction   No. of   Limit  holdings
Name            Office                  Period   shares   price       (1)
-------------------------------------------------------------------------
Mark Leonard    President,       April 1, 07 -   10,000  $ 25.00    0.7%
                 Constellation    April 30, 07
                 Software Inc.
Mark Leonard    President,        May 1, 07 -    10,000  $ 25.25    0.7%
                 Constellation     May 31, 07
                 Software Inc.
Mark Leonard    President,       June 1, 07 -    10,000  $ 25.75    0.7%
                 Constellation    June 30, 07
                 Software Inc.
Mark Leonard    President,       July 1, 07 -    10,000  $ 26.00    0.7%
                 Constellation    July 31, 07
                 Software Inc.
Mark Leonard    President,        Aug 1, 07 -    10,000  $ 26.50    0.7%
                 Constellation     Aug 31, 07
                 Software Inc.
Mark Leonard    President,       Sept 1, 07 -    10,000  $ 26.75    0.7%
                 Constellation    Sept 30, 07
                 Software Inc.
Mark Leonard    President,        Oct 1, 07 -    10,000  $ 27.25    0.7%
                 Constellation     Oct 31, 07
                 Software Inc.
Mark Leonard    President,        Nov 1, 07 -    10,000  $ 27.75    0.7%
                 Constellation     Nov 30, 07
                 Software Inc.
Mark Leonard    President,        Dec 1, 07 -    10,000  $ 28.00    0.7%
                 Constellation     Dec 31, 07
                 Software Inc.
Ian Keaveny     Chairman,         Jan 1, 07 -    50,000  $ 21.50   33.3%
                 Trapeze           Dec 31, 07
                 Software Inc.
Jeff Bender     CEO, N. Harris    Jan 1, 07 -    16,000  $ 21.00   17.7%
                 Computer Corp.    Dec 31, 07
Brock Philp     CEO, Gary Jonas   Jan 1, 07 -    18,000  $ 25.00   28.6%
                 Computing Ltd     Dec 31, 07
John Billowits  President of      Jan 1, 07 -     2,000  $ 23.50    6.1%
                 Club Division,    Dec 31, 07
                 Gary Jonas
                 Computing Ltd
John Billowits  President of      Jan 1, 07 -     2,000  $ 24.50    6.1%
                 Club Division,    Dec 31, 07
                 Gary Jonas
                 Computing Ltd
John Billowits  President of      Jan 1, 07 -     1,000  $ 26.00    3.0%
                 Club Division,    Dec 31, 07
                 Gary Jonas
                 Computing Ltd
Bernard         VP Business       Jan 1, 07 -     4,000  $ 35.00    2.5%
 Anzarouth       Development,      Dec 31, 07
                 Constellation
                 Software Inc.
Bernard         VP Business       Jan 1, 07 -     6,000  $ 37.00    3.8%
 Anzarouth       Development,      Dec 31, 07
                 Constellation
                 Software Inc.
Bernard         VP Business       Jan 1, 07 -     8,000  $ 39.00    5.1%
 Anzarouth       Development,      Dec 31, 07
                 Constellation
                 Software Inc.
Bernard         VP Business       Jan 1, 07 -    10,000  $ 41.00    6.3%
 Anzarouth       Development,      Dec 31, 07
                 Constellation
                 Software Inc.

Under each trading plan, the purchases and dispositions will occur from time to time and will be under the direction of the independent broker engaged by each officer or director. As of December 14, 2006, to our knowledge, the aforementioned participants were the only directors, officers or employees who had adopted automatic share purchase and disposition plans. Additional directors, officers and employees may establish such programs in the future.

About Constellation Software Inc.:

Constellation Software Inc.'s common shares are listed on the Toronto Stock Exchange under the symbol "CSU". Constellation 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.

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.