Block Listing Application

24 May 2011

Amerisur Resources plc

Block Listing Application

Amerisur Resources plc, the oil and gas explorer and developer focused on South America, announces that it has made an application in respect of a block listing of 5,000,000 ordinary shares of 0.1 pence each in the Company to be admitted to trading on AIM on 31 May 2011.

The block listing is in respect of Ordinary Shares to be allotted pursuant to future exercises of options under the Company's Unapproved Share Option Scheme. The shares, when allotted, will be issued fully paid up and will rank pari passu in all respects with the existing ordinary shares of the Company.

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