Sept 21 (Reuters) - Constellation Software Inc CSU.TO :
* CONSTELLATION SOFTWARE INC. FILES PRELIMINARY PROSPECTUS IN CONNECTION WITH PROPOSED TOPICUS.COM SPIN OUT
* CONSTELLATION SOFTWARE - WILL REMAIN SIGNIFICANT SHAREHOLDER OF TOPICUS.COM
* CONSTELLATION SOFTWARE - CURRENT CO'S SHAREHOLDERS ENTITLED TO RECEIVE, PRO RATA, BY WAY OF DIVIDEND-IN-KIND, SUBORDINATE VOTING SHARES IN TOPICUS.COM