Holding(s) in Company

Cookson Group PLC
17 March 2006


17 March 2006


Cookson Group plc  - Holding(s) in Company


Cookson Group plc was informed on 17 March 2006 that, on 16 March 2006, Standard
Life Investments disposed of 95,860 shares on behalf of Standard Life Group.
This decreased the total held as a notifiable interest (including material
interests only) to 13,292,908 shares being 6.95% of the issued stock of that
class.


No. of shares held                             Registered Name

13,292,908                                     Vidacos Nominees


Standard Life also continues to hold a non-material interest of c.5% in the
shares of Cookson Group plc.


Cookson Group plc
265 Strand
London WC2R 1DB
Tel:   [phone]
Fax:   [phone]
Web:   www.cooksongroup.co.uk


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