Additional Listing

FOR IMMEDIATE RELEASE                                          11 November 2004

                                  SOPHEON PLC                                  

                              Additional Listing                               

Sopheon plc announces that it has issued 4,166,667 ordinary shares of 5p each
in connection with the exercise of conversion rights in respect of £500,000
nominal value of convertible loan stock, at a conversion price of 12p per
ordinary share. As described in Sopheon's announcement of 25 June 2004, the
terms of the loan stock, of which approximately £1.5m now remains unconverted,
were recently modified such that it no longer carries an interest coupon, and
such that any unconverted loan stock will automatically convert into equity at
maturity on 31 December 2005. Application has been made for the new ordinary
shares to be admitted to trading on AIM and dealings are expected to commence
on 16 November 2004.

For further information contact:

Barry Mence, Chairman Sopheon plc                 Tel : + 44 (0) 1483 685  
                                                  735                      
Arif Karimjee, CFO                                                         
                                                                           
Adam Reynolds         Hansard Communications      Tel : + 44 (0) 207 245   
                                                  1100                     
Andrew Tan                                                                 
                                                  + 44 (0) 7957 203 685    
                                                                           
Barbara Jansen        Citigate First Financial    Tel : + 31 (0) 205 754   
                                                  010                      

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