Additional Listing

Embargoed Release:11:00hrs Friday 26th August 2005

                                  SOPHEON PLC                                  

                           Conversion of loan stock                            

Sopheon plc announces that an investor has exercised conversion rights in
respect of £100,000 nominal value of convertible loan stock resulting in the
issue of 833,333 ordinary shares, at a conversion price of 12p per ordinary
share. Application has been made for the new ordinary shares, which are subject
to certain lock-in requirements, to be admitted to trading on AIM and dealings
are expected to commence on 2 September 2005.

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    
                                                                           
Floor van Maaren      Citigate First Financial    Tel : + 31 (0) 205 754   
                                                  010