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 GB00B07V4P80 2. Reason for the notification (please state Yes/No): An acquisition or disposal of voting rights: ( No) An acquisition or disposal of financial instruments which may result in the acquisition of shares already issued to which voting rights are attached: ( No ) An event changing the breakdown of voting rights: ( No ) Other (please specify): ( Yes: amendment to disclosure submitted on 27 February 2009 ) 3. Full name of person(s) subject to the notification obligation: UBS Investment Bank 4. Full name of shareholder(s) (if different from 3.): UBS AG London Branch 5. Date of the transaction (and date on which the threshold is crossed or reached if different): 25 FEBRUARY 2009 6. Date on which issuer notified: 27 FEBRUARY 2009 7. Threshold(s) that is/are crossed or reached: BELOW NOTIFIABLE THRESHOLD 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 GB00B07V4P80 Below notifiable threshold Resulting situation after the triggering transaction Class/type of shares if Number of Number of voting % of voting rights possible using the ISIN shares rights CODE Direct Direct Indirect Direct Indirect GB00B07V4P80 Below Below Below notifiable notifiable notifiable threshold threshold threshold 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 Below notifiable threshold 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: 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

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