Additional Listing

Sopheon PLC
18 November 2005


                                  SOPHEON PLC

                            Conversion of loan stock

Sopheon plc announces that an investor has exercised conversion rights in
respect of £40,000 nominal value of convertible loan stock resulting in the
issue of 333,333 ordinary shares, at a conversion price of 12p per ordinary
share. Application has been made for the new ordinary shares to be admitted to
trading on AIM, and dealings are expected commence on 24 November 2005.



FOR FURTHER INFORMATION CONTACT:

Barry Mence, Chairman     Sopheon plc                Tel: [phone]
Arif Karimjee, CFO

Adam Reynolds             Hansard Communications     Tel: [phone]
Andrew Tan                                           Tel: [phone]

Floor van Maaren          Citigate First Financial   Tel: [phone]


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