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: (No) An event changing the breakdown of voting rights: ( No ) Other (please specify) ( No ) 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): 20 June 2011 6. Date on which issuer notified: 21 June 2011 7. Threshold(s) that is/are crossed or reached: 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 B3WK547 Not disclosed 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 B3WK547 14,384,041 5.20 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 N/A Total (A+B+C) Number of voting % of voting rights rights 14,384,041 5.20 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: Vidacos Nominees Ltd (12,175,518 - 4.40%) State Street Nominees Ltd (1,170,879 - 0.42%) BNY (OCS) Nominees Ltd (1,037,644 - 0.38%) Pearl Group Limited Impala Holdings Limited Pearl Group Holdings (No 1) Ltd Ignis Asset Management Ignis Investment Services Ltd (indirect) 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