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:

Baillie Gifford & Co

 

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):

13 JANUARY 2009

 

6. Date on which issuer notified:

14 JANUARY 2009

 

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

5%

 

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                           14,809,320          6.97%   
                                                                      
GB00B07V4P80                                                          
                                                                      

 

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 Indirect   Direct Indirect
                                                                                     
                                                                                     
Ordinary Shares                        12,584,520          12,584,520        5.92    
                                                                                     
GB00B07V4P80                                                                         
                                                                                     

 

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           
                                        
                                        
12,584,520             5.92             
                                        

 

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

In the narrative below, the figures in [ ] indicate the amount of voting rights
and the percentage held by each controlled undertaking where relevant.

Baillie Gifford & Co, a discretionary investment manager, is the parent
undertaking of an investment management group.

Its wholly-owned subsidiary undertaking Baillie Gifford Overseas Limited
[474,853; 0.2%] is also a discretionary investment manager.

Its wholly-owned subsidiary undertaking Baillie Gifford & Co Limited [364,000;
0.2%] is an OEIC Authorised Corporate Director and Unit Trust Manager which has
delegated its discretionary investment management role to Baillie Gifford & Co.

Its wholly-owned subsidiary undertaking Baillie Gifford Life Limited [848,400;
0.4%] is a life assurance company which procures discretionary investment
management services from Baillie Gifford & Co in respect of its own account
shareholdings.

 

Proxy Voting:

 

10. Name of the proxy holder:

N/A

 

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:

N/A

 

14. Contact name:

RACHEL FELL, DEPUTY SECRETARY, COOKSON GROUP PLC

 

15. Contact telephone number:

+  44 (0) 20 7822 0000