Holding(s) in Company

RNS Number:5788U
Plexus Holdings Plc
10 April 2007


TR-1:               notification of major interests in shares


1. Identity of the issuer or the underlying issuer of existing           Plexus Holdings plc
shares to which voting rights are attached:

2. Reason for the notification (please tick the appropriate box or boxes):
An acquisition or disposal of voting rights
An acquisition or disposal of financial instruments which may result in the acquisition of
shares already issued to which voting rights are attached
An event changing the breakdown of voting rights
Other (please specify):  Declaration of notifiable interest under FSA transitional      X
provisions

3. Full name of person(s) subject to the notification                 Mutual Holdings Ltd
obligation:

4. Full name of shareholder(s) (if different from 3.):

5. Date of the transaction and date on which the threshold is                    N/A
crossed or reached:

6. Date on which issuer notified:                                           20 March 2007

7. Threshold(s) that is/are crossed or reached:                                Above 3%

8. Notified details:


A: Voting rights attached to shares
Class/type of shares Situation previous to the Resulting situation after the triggering transaction
                     Triggering transaction
 if possible using   Number of    Number of    Number of     Number of voting rights % of voting rights
the ISIN CODE        Shares       Voting       shares
                                  Rights       Direct        Direct       Indirect   Direct    Indirect
Ordinary Shares of   60,000,001   60,000,001   60,000,001    60,000,001              74.83
1p (GB00B0MDF233)




B: Financial Instruments
Resulting situation after the triggering transaction
Type of financial    Expiration date Exercise/ Conversion      Number of voting rights    % of voting
instrument                           Period/ Date              that may be acquired if    rights
                                                               the instrument is
                                                               exercised/ converted.



Total (A+B)
Number of voting rights                            % of voting rights
60,000,001                                         74.83%


9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively
held, if applicable:



Proxy Voting:

10. Name of the proxy holder:

11. Number of voting rights proxy holder will cease to hold:

12. Date on which proxy holder will cease to hold voting rights:

13. Additional information:

14. Contact name:                            Graham Stevens

15. Contact telephone number:                0207 589 8555




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