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 qualifying financial instruments which may result
in the acquisition of shares already issued to which voting rights are
attached: ( No )

 

An acquisition or disposal of instruments with similar economic effect to
qualifying financial instruments: (Yes )

 

An event changing the breakdown of voting rights: ( No )

 

Other (please specify) ( No )

 

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

BlackRock, Inc.

 

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

 

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

2 June 2011

 

6. Date on which issuer notified:

    3 June 2011

 

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

Holding has gone below 5%

 

8. Notified details:

 

A: Voting rights attached to shares

 

Class/type of shares   Situation previous to the Triggering           
if possible using the  transaction                                    
ISIN CODE                                                             
                                                                      
                       Number of shares       Number of voting Rights 
                                                                      
                                                                      
                                                                      
GB00B3WK5475           12,568,604                        12,568,604   
                                                                      

 

Resulting situation after the triggering transaction

 

Class/type of shares  Number of shares   Number of voting rights     % of voting rights  
if possible using the                                                                    
ISIN CODE                                                                                
                                                                                         
                      Direct             Direct     Indirect         Direct    Indirect  
                                                                                         
                                                                                         
                                                                                         
GB00B3WK5475          N/A                N/A        10,808,718       N/A       3.91      
                                                                                         

 

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

 

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

 

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

Resulting situation after the triggering transaction

 

Type of     Exercise price   Expiration date  Exercise/Conversion Number of voting     % of voting rights
financial                                     period              rights instrument                      
instrument                                                        refers to                              
                                                                                                         
                                                                                                         
                                                                                                         
                                                                                       Nominal   Delta   
                                                                                                         
CFD                                                               1,515,546            0.55      0.55    
                                                                                                         

 

Total (A+B+C)

Number of voting     % of voting rights 
rights                                  
                                        
                                        
                                        
12,324,264           4.46               
                                        

 

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

BlackRock Investment Management (UK) Limited - 12,324,264 (4.46%)

 

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:

SILVANA GLIBOTA-VIGO, COMPANY SECRETARIAL ASSISTANT, COOKSON GROUP PLC

 

15. Contact telephone number:

+ 44 (0)20 7822 0000