Holding(s) in Company

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                   Ben van Bilderbeek
obligation:

4. Full name of shareholder(s) (if different from 3.):           Mutual Holdings Ltd     (see
                                                                   box 9 for further details)
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       % of voting rights
the ISIN CODE        Shares       Voting       shares        rights
                                  Rights       Direct        Direct    Indirect     Direct    Indirect
Ordinary Shares of   60,000,001   60,000,001   60,000,001              60,000,001             70.875
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                                         70.875%


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

Ben van Bilderbeek is one of the beneficiaries of a trust which controls 70.875% of the shares of Mutual Holdings
Limited (formerly Plexus International Limited).  The 60,000,001 shares are held by Mutual Holdings Limited in the
Company.


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




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