Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARES

 

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

COOKSON GROUP PLC

 

2. Reason for the notification (please state Yes/No):

 

An acquisition or disposal of voting rights: ( Yes)

 

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) : (    )

 

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

     Aviva plc & its subsidiaries    

 

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

     Registered Holders:

 

     BNY Norwich Union Nominees Limited 1,905,987*

     Chase GA Group Nominees Limited    5,458,217*

     Chase Nominees Limited           402,106*

     CUIM Nominee Limited   1,663,069*

     Chase Nominees Limited           523,381

     CUIM Nominee Limited   174,221

 Vidacos Nominees Limited       73,315

 

     * denotes direct interest

 

5. Date of the transaction (and date on which the threshold is crossed or
reached if different):

11 December 2007

 

6. Date on which issuer notified:

12 December 2007

 

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

5% to 4% change at combined interest level

 

8. Notified details:

……………..

 

 

A: Voting rights attached to shares

 

Class/type of shares if possible         Situation previous to the    
using the ISIN CODE                       Triggering transaction      
                                                                      
                                     Number of     Number of voting   
                                     shares        Rights             
                                                                      
                                                                      
Ordinary Shares                                                       
                                                                      
                                                                      
GB00B07V4P80                                                          
                                                                      
                                                                      
                                     11,303,296    11,303,296         
                                                                      

 

 

Resulting situation after the triggering transaction

 

Class/type of shares if possible using Number of   Number of voting   % of voting    
the ISIN CODE                          shares      rights             rights         
                                                                                     
                                       Direct      Direct    Indirect Direct Indirect
                                                                                     
                                                                                     
Ordinary Shares                                                                      
                                                                                     
                                                                                     
GB00B07V4P80                                                                         
                                                                                     
                                                                                     
                                       9,429,349   9,429,349 770,917  4.45   0.36    
                                                                                     

 

B: Financial Instruments

Resulting situation after the triggering transaction

 

Type of      Expiration Exercise/      Number of voting rights that may be   % of    
financial    Date       Conversion     acquired if the instrument is         voting  
instrument              Period/ Date   exercised/ converted.                 rights  
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                      N/A                                            
                                                                                     

 

 

Total (A+B)

Number of voting       % of voting      
rights                 rights           
                                        
                                        
10,200,296             4.80             
                                        

 

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

See Section 4

 

Proxy Voting:

 

10. Name of the proxy holder:

     See Section 4

 

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

N/A

 

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

N/A

 

13. Additional information:

 

 

14. Contact name:

RACHEL FELL, DEPUTY SECRETARY, COOKSON GROUP PLC

 

15. Contact telephone number:

020 7822 0000