Director/PDMR Shareholding

Cookson Group PLC 14 June 2007 NOTIFICATION OF TRANSACTIONS OF DIRECTORS, PERSONS DISCHARGING MANAGERIAL RESPONSIBILITY OR CONNECTED PERSONS This form is intended for use by an issuer to make a RIS notification required by DR 3.1.4R(1). (1) An issuer making a notification in respect of a transaction relating to the shares or debentures of the issuer should complete boxes 1 to 16, 23 and 24. (2) An issuer making a notification in respect of a derivative relating to the shares of the issuer should complete boxes 1 to 4, 6, 8, 13, 14, 16, 23 and 24. (3) An issuer making a notification in respect of options granted to a director /person discharging managerial responsibilities should complete boxes 1 to 3 and 17 to 24. (4) An issuer making a notification in respect of a financial instrument relating to the shares of the issuer (other than a debenture) should complete boxes 1 to 4, 6, 8, 9, 11, 13, 14, 16, 23 and 24. Please complete all relevant boxes in block capital letters. 1. Name of the issuer COOKSON GROUP plc .................................... 2. State whether the notification relates to (i) a transaction notified in accordance with DR 3.1.4R(1)(a); or (ii) DR 3.1.4(R)(1)(b) a disclosure made in accordance with section 324 (as extended by section 328) of the Companies Act 1985; or (iii) both (i) and (ii) III .................................... 3. Name of person discharging managerial responsibilities/director JEFFREY LINDSAY HEWITT .................................... 4. State whether notification relates to a person connected with a person discharging managerial responsibilities/director named in 3 and identify the connected person IN RESPECT OF DIRECTOR NAMED IN 3, JEFFREY LINDSAY HEWITT .................................... 5. Indicate whether the notification is in respect of a holding of the person referred to in 3 or 4 above or in respect of a non-beneficial interest IN RESPECT OF DIRECTOR NAMED IN 3, JEFFREY LINDSAY HEWITT .................................... 6. Description of shares (including class), debentures or derivatives or financial instruments relating to shares ORDINARY 10p SHARES .................................... 7. Name of registered shareholders(s) and, if more than one, the number of shares held by each of them BARCLAYSHARE NOMINEES LIMITED .................................... .................................... 8 State the nature of the transaction REINVESTMENT OF DIVIDEND .................................... .................................... 9. Number of shares, debentures or financial instruments relating to shares acquired 56 ORDINARY 10p SHARES .................................... 10. Percentage of issued class acquired (treasury shares of that class should not be taken into account when calculating percentage) Less than 0.01% .................................... 11. Number of shares, debentures or financial instruments relating to shares disposed N/A .................................... 12. Percentage of issued class disposed (treasury shares of that class should not be taken into account when calculating percentage) N/A .................................... 13. Price per share or value of transaction 692.375p .................................... 14. Date and place of transaction 12 JUNE 2007, LONDON .................................... 15. Total holding following notification and total percentage holding following notification (any treasury shares should not be taken into account when calculating percentage) 5,722 ORDINARY 10p SHARES, 0.003% .................................... 16. Date issuer informed of transaction 14 JUNE 2007 .................................... If a person discharging managerial responsibilities has been granted options by the issuer complete the following boxes 17 Date of grant .................................... 18. Period during which or date on which it can be exercised .................................... 19. Total amount paid (if any) for grant of the option .................................... 20. Description of shares or debentures involved (class and number) .................................... .................................... 21. Exercise price (if fixed at time of grant) or indication that price is to be fixed at the time of exercise .................................... 22. Total number of shares or debentures over which options held following notification .................................... 23. Any additional information .................................... 24. Name of contact and telephone number for queries RACHEL FELL, DEPUTY SECRETARY, COOKSON GROUP plc, 020 7822 0000 .................................... Name and signature of duly authorised officer of issuer responsible for making notification RACHEL FELL, DEPUTY SECRETARY, COOKSON GROUP plc, 020 7822 0000 .................................... Date of notification 14 JUNE 2007 .................................... END This information is provided by RNS The company news service from the London Stock Exchange

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