Holding(s) in Company

Synairgen plc

("Synairgen" or the "Company")

Holdings in Company

Synairgen plc (AIM: SNG) has received notification that, on 15 May 2013, Mr Michael Underwood transferred 500,000 ordinary shares of 1p each in the capital of the Company ("Ordinary Shares") to his wife, Mrs P A Underwood for nil consideration.

Following this transfer, Mr Underwood's holding (as defined in the AIM Rules for Companies) in the Company remains unchanged at 3,970,588 Ordinary Shares, representing 5.28% of the Company's total voting rights.

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