Holding(s) in Company

STM Group PLC
26 July 2007


                                 STM Group plc

                            ('STM' or the Company')


                             Holding(s) in Company



The Company has been informed that as at close of business on 24 July 2007, Rock
Holdings Limited a company registered in the Isle of Man, held an interest in
3,670,367 shares in STM Group plc of which 3,090,367 shares have been
transferred into Rock Holdings Limited's own name from STM Fidecs Nominees
Limited at nil consideration. This holding comprises approximately 10.31% of the
issued share capital of STM Group.


Rock Holdings Limited is connected to Arron Banks and Paul Chase-Gardener, who
also hold interests, directly, in the shares of STM group as follows:


Arron Banks: 89,590; and
Paul Chase Gardener: 305,000.


Together Rock Holdings Limited, Arron Banks and Paul Chase-Gardener are
interested in 4,064,957 shares of STM Group, which comprises approximately
11.42% of the issued shares of STM Group.


STM Fidecs Nominees Limited has also made transfers as follows:


1,465,689 ordinary shares transferred into the name of Nightingale Equities Inc
at nil consideration; such transfer now representing 4.12 % of the Company's
issued share capital held by Nightingale Equities Inc.


22,222 and 100,000 respectively have been transferred into private names, also
at nil consideration.


Following the above transactions STM Fidecs Nominees Limited is now interested
in 1,880,424 ordinary shares representing 5.28 % of the Company's current issued
share capital.



For further information:


STM Group plc                                Tel: [phone]
Tim Revill, Chief Executive Officer


Daniel Stewart & Company plc                 Tel: [phone]
Lindsay Mair




                      This information is provided by RNS
            The company news service from the London Stock Exchange