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AEA Technology PLC (AAT)

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Tuesday 13 November, 2007

AEA Technology PLC

Holding(s) in Company

AEA Technology PLC
13 November 2007

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES



1. Name of listed company



AEA Technology plc



2. Name of shareholder having a major interest



Artemis Investment Management Limited



3. Please state whether notification indicates that it is regarding the holding
of the shareholder named in 2 above; in respect of a non-beneficial interest; or
in the case of an individual holder if it is a holding of that person's spouse
or children under the age of 18



As 2 above plus certain of its investment clients



4. Name of the registered holder(s) and, if more than one holder, the number of
shares held by each of them



Institutional Special Situations    1,473,212

Artemis Special Situations         11,265,168

Prudential Staff Pension Scheme    1,637,087

Akzo Nobel Pension Scheme          1,641,874

Pearson                            1,663,387



5. Number of shares / amount of stock acquired



N/A



6 Percentage of issued class (any treasury shares held by the listed company
should not be taken into account when calculating percentage)



N/A



7. Number of shares / amount of stock disposed



1,700,120



8 Percentage of issued class (any treasury shares held by the listed company
should not be taken into account when calculating percentage)



1.4%



9. Class of security



Ordinary £0.1222p



10. Date of transaction



22 October 2007



11. Date listed company informed



13 November 2007



12. Total holding following this notification



17,680,728



13. Total percentage holding of issued class following this notification (any
treasury shares held by the listed company should not be taken into account when
calculating percentage)



14.24%



14. Any additional information



None



15. Name of contact and telephone number for queries



Philip Roper 0870 190 8145



16. Name and signature of duly authorised officer of the listed company
responsible for making this notification



Philip Roper (Company Secretary)



Date of notification



13 November 2007



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