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: (   )

 

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): ( Yes, market transfer between indirect and direct
funds )

 

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       59,984,007*

Chase GA Group Nominees Limited         178,763,079*

Chase Nominees Limited                    8,261,497*

CUIM Nominee Limited                     34,912,967*

Vidacos Nominees Limited                    355,368*

Chase Nominees Limited                   15,855,457

Vidacos Nominees Limited                  1,123,944

 

 * denotes direct interest

 

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

22 April 2009

 

6. Date on which issuer notified:

23 April 2009

 

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

9% to 10% change at direct 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 shares  Number of voting 
                                                           Rights           
                                                                      
                                                                      
Ordinary Shares                                                       
                                                                      
                                                                      
GB00B07V4P80                                                          
                                                                      
                                                                      
                                        292,985,062      292,985,062  
                                                                      
                                                                      
                                                                      

 

 

Resulting situation after the triggering transaction

 

Class/type of shares if possible   Number of   Number of voting       % of voting    
using the ISIN CODE                shares      rights                 rights         
                                                                                     
                                   Direct      Direct      Indirect   Direct Indirect
                                                                                     
                                                                                     
Ordinary Shares                                                                      
                                                                                     
                                                                                     
GB00B07V4P80                       282,276,918 282,276,918 16,979,401 10.21  0.62    
                                                                                     

 

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           
                                        
                                        
299,256,319            10.83            
                                        

 

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

The voting rights are managed and controlled by Aviva Investors Global Services
Limited, with the following chain of controlled undertakings:

 

Aviva Investors Global Services Limited:

·        Aviva plc (parent company)

·        Aviva Group Holdings Limited (wholly owned subsidiary of Aviva plc)

·        Aviva Investors Holdings Limited (wholly owned subsidiary of Aviva
Group Holdings Limited)

·        Aviva Investors Global Services Limited (wholly owned subsidiary of
Aviva Investors Holdings Limited)

 

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