4 September 2015

                                   Acacia Mining plc                               

                                        LSE:ACA                                    

                              ("Acacia" or the "Company")                          

                     Conversion Rate for the 2015 Interim Dividend                 

    Further to the announcement of the arrangements for the 2015 final dividend
    provided with the Company's 2015 interim results, Acacia has determined that
    the exchange rate to be applied to the 2015 interim dividend is £1.00=
    US$1.5234. The sterling equivalent of the dividend of 1.4 cents per share will
    be approximately 0.9 pence per share.

    The final dividend will be paid on 25 September 2015 to shareholders on the
    register on 28 August 2015.

    ENQUIRIES

    For further information, please visit our website: http://www.acaciamining.com/
    or contact:

    Acacia Mining plc                      +44 (0)20 7129 7150                   

    Giles Blackham, Investor Relations Manager