Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

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

Aggreko plc

2 Reason for the notification (please tick the appropriate box or boxes):

An acquisition or disposal of voting rights

 x

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

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

An event changing the breakdown of voting rights

Other (please specify):

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

 Prudential plc group of companies

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

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

 28 May 2009

6. Date on which issuer notified:

 29 May 2009

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

 See item 13

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

Resulting situation after the triggering transaction

Number of Shares

Number of Voting Rights

Number of shares

Number of voting rights

% of voting rights

Direct

Direct

Indirect

Direct

Indirect

 GB0001478998

18,127,884 

18,127,884

18,170,717

18,170,717

6.65%

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

Total (A+B+C)

Number of voting rights

Percentage of voting rights

 18,170,717

 6.65%

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

Prudential plc (Parent Company)

M&G Group Limited (wholly owned subsidiary of Prudential plc)

M&G Investment Management Limited (wholly owned subsidiary of M&G Limited)

M&G Limited (wholly owned subsidiary of M&G Group Limited) 

Proxy Voting:

10. Name of the proxy holder:

 N/A

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:

 As per 5.1.2 the non-exempt holdings for Prudential plc are now above 3%.

14. Contact name:

 Peter Kennerley

15. Contact telephone number:

 0141 225 5900

Registered Holder

Holding

%

Prudential plc

18,170,717

6.65 Total Notifiable Interest

HSBC Seoul GL Basics Mother FD

2,779

JNL/M&G Global Basics Fund

7,029

JP Morgan Nominees

299,161

Nortrust Nominee Ltd A/C MHF01

60,049

Nortrust Nominee Ltd A/C MKK01

5,464,167

Nortrust Noms Ltd

9,147

Nortrust Noms Ltd A/C MEJ01 

4,400,000

PRUCLT HSBC GIS NOT (K) PAC AC

6,762,532

PRUCLT HSBC GIS NOM (UK) PPL AC

1,165,853

M&G Group Limited

17,871,556

6.54

HSBC Seoul GL Basics Mother FD

2,779

JNL/M&G Global Basics Fund

7,029

Nortrust Nominee Ltd A/C MHF01

60,049

Nortrust Nominee Ltd A/C MKK01

5,464,167

Nortrust Noms Ltd

9,147

Nortrust Noms Ltd A/C MEJ01 

4,400,000

PRUCLT HSBC GIS NOT (K) PAC AC

6,762,532

PRUCLT HSBC GIS NOM (UK) PPL AC

1,165,853

M&G Investment Management Limited

17,811,507

6.52

HSBC Seoul GL Basics Mother FD

2,779

JNL/M&G Global Basics Fund

7,029

Nortrust Nominee Ltd A/C MKK01

5,464,167

Nortrust Noms Ltd

9,147

Nortrust Noms Ltd A/C MEJ01 

4,400,000

PRUCLT HSBC GIS NOT (K) PAC AC

6,762,532

PRUCLT HSBC GIS NOM (UK) PPL AC

1,165,853

M&G Limited

17,871,556

6.54

HSBC Seoul GL Basics Mother FD

2,779

JNL/M&G Global Basics Fund

7,029

Nortrust Nominee Ltd A/C MHF01

60,049

Nortrust Nominee Ltd A/C MKK01

5,464,167

Nortrust Noms Ltd

9,147

Nortrust Noms Ltd A/C MEJ01 

4,400,000

PRUCLT HSBC GIS NOT (K) PAC AC

6,762,532

PRUCLT HSBC GIS NOM (UK) PPL AC

1,165,853