Holding(s) in Company

6 Mar 2009 17:22

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:

AEGON UK Group of Companies

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):

5 March 2009

6. Date on which issuer notified:

6 March 2009

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

3% 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 ISIN GB00B07V4P80 38,238,946 38,238,946

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 ISIN GB00B07V4P80 93,238,946 88,207,280 5,031,666 3.19 0.18 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 93,238,946 3.37

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

AEGON UK Group of companies - parent undertaking of:

AEGON Asset Management UK plc

AEGON Investment Management UK ltd

AEGON ICVC Proxy Voting:

10. Name of the proxy holder:

AEGON UK Group of companies

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:

AEGON UK Group of companies - consists of:

AEGON Asset Management UK plc

AEGON Investment Management UK Ltd

AEGON ICVC 14. Contact name:

RACHEL FELL, DEPUTY SECRETARY, COOKSON GROUP PLC

15. Contact telephone number:

+ 44 (0) 20 7822 0000