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:

STANDARD LIFE INVESTMENTS LTD

 

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

VIDACOS NOMINEES

 

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

20 MAY 2010

 

6. Date on which issuer notified:

     21 MAY 2010

 

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

8%

 

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               
                                                                      
                                                                      
GB00B3WK5475                        22,075,214        22,075,214      
                                                                      

 

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     Indirect  Direct Indirect
                                                                                     
                                                                                     
GB00B3WK5475                         22,288,487  13,691,858 8,596,629 4.953  3.11    
                                                                                     

 

B: Qualifying 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                                            
                                                                                     

 

C: Financial Instruments with similar economic effect to Qualifying Financial
Instruments

Resulting situation after the triggering transaction

 

Type of financial  Exercise  Expiration Exercise/         Number of voting rights       % of voting  
instrument         price     date       Conversion period instrument refers to          rights       
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                        Nominal Delta
                                                                                                     
                                      N/A                                                            
                                                                                                     

 

Total (A+B+C)

Number of voting       % of voting      
rights                 rights           
                                        
                                        
22,288,487             8.063            
                                        

 

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:

RACHEL FELL, DEPUTY SECRETARY, COOKSON GROUP PLC

 

15. Contact telephone number:

+ 44 (0)20 7822 0000