Transaction in Own Shares

Aggreko PLC

3 May 2012

Aggreko PLC: Transaction in Own Shares

Aggreko PLC ("Aggreko") announced on 14 March 2012 that it had sent a letter to the holders of its B Shares outlining a proposed purchase offer in relation to its B Shares to be made by Aggreko, subject to certain conditions (the "Further Purchase Offer").

The B Shares were created pursuant to the return of approximately £150 million of cash approved by Shareholders on 5 July 2011, details of which were contained in the Circular to Shareholders dated 10 May 2011 (the "Circular").

The terms of the Further Purchase Offer enabled Shareholders to sell some or all of their B Shares at 55.5 pence per B Share, free of all dealing expenses and commissions.

Valid elections for the Further Purchase Offer were received from Shareholders in respect of 2,947,585 B Shares, representing 44.23 per cent. of the outstanding B Shares. These B Shares have been purchased by the Company from those Shareholders for 55.5 pence per B Share. The purchased B Shares will be cancelled.

The remaining 3,716,146 B Shares, representing 55.77 per cent. of the B Shares arising pursuant to the Capital Reorganisation, will continue to be in issue.

Terms defined in the Circular have the same meaning when used in this announcement.

For further information:

Capita Registrar Helpline - 0871 664 0321 from within the UK- +44 20 8639 3399 from outside the UK

Calls to the 0871 664 0321 number cost 10 pence per minute (including VAT) plus your service provider's network extras. Calls to the helpline from outside the UK will be charged at applicable international rates. Different charges may apply to calls from mobile telephones and calls may be recorded and randomly monitored for security and training purposes.

None of the Existing Ordinary shares, New Ordinary Shares or the B Shares have been or will be registered under U.S. Securities Act of 1933 as amended (the "Securities Act") or the securities laws of any other U.S. jurisdiction, and none of them may be offered or sold in the United States unless pursuant to an exemption from, or in a transaction not subject to the registration requirements of, the Securities Act.

The release, publication or distribution of this announcement in certain jurisdictions may be restricted by law and therefore persons in such jurisdictions into which this announcement is released, published or distributed should inform themselves about and observe such restrictions.

This announcement does not constitute, or form part of, an offer to sell or the solicitation of an offer to subscribe for any securities, nor the solicitation of any vote or approval in any jurisdiction, nor shall there be any sale, issue or transfer of the securities referred to in this announcement in any jurisdiction in contravention of applicable law.

END