Blocklisting - Interim Review

1 Jul 2011 09:59

BLOCK LISTING SIX MONTHLY RETURN Date: 1 July 2011 Name of applicant: Cookson Group plc Name of scheme: Cookson Group Executive Share Option Schemes (CGESOS) Cookson Group Employee Share Savings Scheme (CGESSS) Period of return: From: 1 January 2011 To: 30 June 2011

Balance of unallotted securities under CGESOS - 117,664 ordinary £1 shares scheme(s) from previous return:

CGESSS - 30,918 ordinary £1 shares Plus: The amount by which the block Nil scheme(s) has been increased since the date of the last return (if any increase has been applied for):

Less: Number of securities issued/ CGESOS - 6,727 ordinary £1 shares allotted under scheme(s) during period

(see LR3.5.7G): CGESSS - Nil

Equals: Balance under scheme(s) not CGESOS - 110,397 ordinary £1 shares yet issued/allotted at end of period:

CGESSS - 30,918 ordinary £1 shares

Following the cessation of the Cookson Group Employee Share Savings Scheme, no further returns will be made in respect of this scheme.

Name of contact: Silvana Glibota-Vigo

Telephone number of contact: 020 7822 0000

Name of person making return: Silvana Glibota-Vigo, Company Secretarial Assistant, Cookson Group plc