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) : ( Yes - New Exemption Trading book DTR 5.1.3 (4) ) 3. Full name of person(s) subject to the notification obligation: THE GOLDMAN SACHS GROUP, INC 4. Full name of shareholder(s) (if different from 3.): GOLDMAN SACHS & CO. GOLDMAN SACHS ASSET MANAGEMENT INTERNATIONAL GOLDMAN SACHS ASSET MANAGEMENT, L.P. 5. Date of the transaction (and date on which the threshold is crossed or reached if different): 1 AUGUST 2007 6. Date on which issuer notified: 3 AUGUST 2007 7. Threshold(s) that is/are crossed or reached: 15% 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 29,043,726 15.01% 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 Direct Indirect Direct Indirect GB00B07V4P80 28,860,764 14.91 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 28,860,764 14.91 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: The interest in 27,282 shares arose from an interest held by Goldman, Sachs & Co., a wholly-owned direct subsidiary of GS Inc, acting as custodian for its customers. These shares are, or will be, registered in the name of Goldman Sachs Securities (Nominees), Limited. The interest in 20,910 shares arose from an interest held by Goldman, Sachs & Co., a wholly-owned direct subsidiary of GS Inc, acting as discretionary manager. These shares are, or will be, registered in the name of Goldman Sachs Securities (Nominees), Limited. The interest in 8,347,067 shares arose from the interest held by Goldman Sachs Asset Management International, a wholly-owned subsidiary of GS Inc acting as discretionary manager. It is believed that some of these shares are, or will be, registered in the name of Goldman Sachs Securities (Nominees), Limited ("GSSN"). The interest in 20,465,505 shares arose from the interest held by Goldman Sachs Asset Management, LP a wholly owned subsidiary of GS Inc acting as discretionary manager. It is believed that some of these shares are, or will be, registered in the name of Goldman Sachs Securities (Nominees), Limited ("GSSN"). 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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