Director/PDMR Shareholding

Cookson Group PLC
07 April 2006



7 April 2006

Directors' Interests

Cookson Group plc



In accordance with the rules of the Cookson Group Long-Term Incentive Plan (the
'Plan') the executive Directors of Cookson Group plc have received their annual
allocations of Performance Shares.  In addition, Nick Salmon, Chief Executive,
and Mike Butterworth, Group Finance Director, have both chosen to invest in
Cookson shares and as a result have received allocations of Matching Shares,
also under the terms of the Plan.



Performance Shares were allocated to executive Directors on 6 April 2006, based
upon the mid-market closing price for shares in Cookson Group plc on 5 April
2006, of 553.25 pence.


Director                                                Performance Shares
N R Salmon                                                    86,308
M G Butterworth                                               46,543



In accordance with the rules of the Plan, the executive Directors have the
possibility to invest all or part of their Annual Incentive in shares in the
Company in return for which they would be granted an award of shares ('Matching
Shares').  In this regard Mr Salmon purchased 37,180 shares and Mr Butterworth
purchased 12,202 shares.  Details of these purchases were announced earlier
today.  As a result of these investments in Company shares, Messrs Salmon and
Butterworth were yesterday allocated 141,991 and 46,600 Matching Shares
respectively.



Awards of Performance and Matching Shares under the Plan will normally vest on
or shortly after the third anniversary of the award date.  The proportion of an
award that vests will be subject to the attainment of certain performance
conditions relating to the performance of the Company over the three financial
years to which the award relates.



As a result of the above, the revised interests of the respective Directors in
the shares of Cookson Group plc are as follows:-


Director        Existing Performance Existing Matching 2006 allocation   2006 allocation       Total      Total 
Allocation
                  Shares allocated   Shares allocated   of Performance     of Matching     Allocation of    of Matching
                under the Long-Term      under the     Shares under the Shares under the    Performance        Shares
                   Incentive Plan        Long-Term        Long-Term         Long-Term         Shares
                                      Incentive Plan    Incentive Plan   Incentive Plan
N R Salmon            156,705             57,964            86,308           141,991          243,013         199,955
M G Butterworth        40,636                -              46,543           46,600           87,179           46,600


Director                                    Current Shareholdings
N R Salmon                                          52,458
M G Butterworth                                     18,202




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








                      This information is provided by RNS
            The company news service from the London Stock Exchange