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: IGNIS INVESTMENT SERVICES LIMITED 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): 10 NOVEMBER 2010 6. Date on which issuer notified: 11 NOVEMBER 2010 7. Threshold(s) that is/are crossed or reached: 4% 8. Notified details: Nominee holdings 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 B3WK547 N/A 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 B3WK547 11,114,427 4.02 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 11,114,427 4.02 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: Pearl Group Limited Impala Holdings Limited Pearl Group Holdings (No 1) Ltd Ignis Asset Management Ltd Ignis Investment Services Ltd (indirect) Vidacos Nominees Ltd (8,691,019 - 3.14%) State Street Nominees (1,628,587 - 0.59%) BNY (OCS) Nominees Ltd (794,821 - 0.29%) 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

Companies

Vesuvius (VSVS)
UK 100

Latest directors dealings