TR-1: Notifications of Major Interests in Shares

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached:

AEA Technology plc

2. Reason for notification (yes/no)

An acquisition or disposal of voting rights

X

An acquisition or disposal of financial instruments which may result in the acquisition of shares already issued to which voting rights are attached 

An event changing the breakdown of voting rights

Other (please specify):______________

3. Full name of person(s) subject to notification obligation:

Artemis Investment Management Limited

4. Full name of shareholder(s) (if different from 3):

Artemis UK Special Situations Fund

Institutional Special Situations

Pearson

Prudential Staff Pension Scheme

Akzo Nobel Pension Scheme

5. Date of transaction (and date on which the threshold is crossed or reached if different):

21 December 2009

6. Date on which issuer notified:

22 December 2009

7. Threshold(s) that is/are crossed or reached:

14%

8: Notified Details

A: Voting rights attached to shares

Class/type of shares

If possible use ISIN code

Situation previous to the triggering transaction

Resulting situation after the triggering transaction

Number of shares

Number of voting rights

Number of shares

Number of voting rights

Percentage of voting rights

Direct

Indirect

Direct

Indirect

GB0031793945

32,213,821

32,213,821

31,713,821

31,713,821

13.86%

B: Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date

Exercise/ conversion period/date 

No. of voting rights that may be acquired (if the instrument exercised/converted)

Percentage of voting rights

Total (A+B)

Number of voting rights

Percentage of voting rights

31,713,821

13.86%

9. Chain of controlled undertakings through which the voting rights and /or the financial instruments are effectively held, if applicable:

Proxy Voting:

10. Name of proxy holder:

11. Number of voting rights proxy holder will cease to hold:

12. Date on which proxy holder will cease to hold voting rights:

13. Additional information:

14. Contact name:

Nicola Collins

15. Contact telephone name:

0131 718 0429