Old Mutual plc Share Interest

Old Mutual PLC
24 January 2006

                                 Old Mutual plc

                                 Share interests


Old Mutual plc (the 'Company') announces that it has received notice today from
Credit Suisse Securities (Europe) Limited that Credit Suisse had a notifiable
interest, for the purposes of Part VI of the UK Companies Act 1985, at 20
January 2006 of approximately 3.04% of the total issued ordinary shares of 10p
each in the Company by virtue of an aggregate holding of 124,398,766 shares held
through the following entities:

Credit Suisse Securities (Europe) Limited 124,353,140*
Credit Suisse International 45,626
* Interest arising by virtue of the right to redelivery of equivalent securities
under stock lending arrangements.

                                                                 24 January 2006



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