INVESTOR RELATIONS

TR-1(i): NOTIFICATION OF MAJOR INTERESTS IN SHARES

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

STM Group PLC

2. Reason for the notification (please state Yes/No): ( )

An acquisition or disposal of voting rights: ( Yes )

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 the notification obligation:

F&C Asset Management plc

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

See Box 9 below

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

10 February 2012

6. Date on which issuer notified:

13 February 2012

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

5%

8. Notified details:

A: Voting rights attached to shares:

Class/type of shares if possible using the ISIN CODE	Situation previous to the Triggering transaction
	Number of shares	Number of voting Rights
IM00B1S9KY98 Ord 0.1p	3,427,122	3,427,122

Resulting situation after the triggering transaction (vii)

Class/type of shares if possible using the ISIN CODE	Number of shares	Number of voting rights		% of voting rights
	Direct	Direct	Indirect	Direct	Indirect
IM00B1S9KY98 Ord 0.1p			5,732,263		13.32%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument	Expiration Date	Exercise/Conversion Period	Number of voting rights that may be acquired if the instrument is exercised/ converted.	% of voting rights
n/a	n/a	n/a	n/a	n/a

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument	Exercise price	Expiration date	Exercise/Conversion Period	Number of voting rights instrument refers to	% of voting rights
					Nominal	Delta
n/a	n/a	n/a	n/a	n/a	n/a	n/a

Total (A+B+C)

Number of voting rights	% of voting rights
0	0.00%

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

F&C Asset Management plc:-

Proxy Voting:

10. Name of the proxy holder:

F&C Asset Management plc

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

n/a

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

n/a

13. Additional information:

n/a

14. Contact name:

Mike Bassi, F&C Asset Management plc

15. Contact number:

0131 718 1093