ACACIA MINING PLC - Nyanzaga Project Update

6 September 2018

Acacia Mining plc

LSE: ACA

(“Acacia” or the “Company”)

Nyanzaga Project Update

Further to the announcements made on 20 July 2018, the Tanzanian Fair Competition Commission (FCC) has now granted its approval for OreCorp Tanzania Limited (OreCorp Tanzania) to increase its interest in Nyanzaga Mining Company Limited (NMCL) to 51%. This move remains subject to: (i) the approval of the newly established Mining Commission, the application for which was lodged at the same time as the application for FCC approval; and (ii) the future payment of US$3 million to the Acacia Group.

In addition, members of the OreCorp Group have now entered into a completion agreement with Acacia and other members of the Acacia Group to allow OreCorp Tanzania to move to 100% ownership of NMCL, and thereby 100% ownership of the Nyanzaga Gold Project (Project). This move remains subject to: (i) the Tanzanian regulatory approvals referred to above; (ii) the grant of the Special Mining Licence (SML) in respect of the Project; and (iii) the making of a future payment of US$7 million. Following completion Acacia will retain a net smelter return production royalty over the Project, capped at US$15 million.

Both OreCorp and Acacia believe that a simplified ownership structure of NMCL is beneficial to the future development of the Project and would enable it to be best placed to provide significant benefits to Tanzania and all stakeholders.

ENQUIRIES

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

Acacia Mining plc

[phone]

Sally Marshak, General Manager - Investor Relations & Communications

Camarco

[phone]

Gordon Poole / Nick Hennis

About Acacia Mining plc

Acacia Mining plc (LSE:ACA) is the UK holding company of the Acacia Group, Tanzania’s largest gold miner and one of the largest producers of gold in Africa. The Acacia Group has three mines, all located in north-west Tanzania: Bulyanhulu, which is owned and operated by Bulyanhulu Gold Mine Limited, Buzwagi, which is owned and operated by Pangea Minerals Limited and North Mara, which is owned and operated by North Mara Gold Mine Limited.

The Acacia Group also has a portfolio of exploration projects in Kenya, Burkina Faso and Mali. Acacia is a UK public company headquartered in London. We are listed on the Main Market of the London Stock Exchange with a secondary listing on the Dar es Salaam Stock Exchange. Barrick Gold Corporation is our majority shareholder.

Disclaimer and forward-looking statements

This announcement is for information purposes only and does not constitute an invitation or offer to underwrite, subscribe for or otherwise acquire or dispose of any securities of Acacia in any jurisdiction. This announcement includes “forward-looking statements” that express or imply expectations of future events or results as opposed to historical facts. These statements include, financial projections and estimates and their underlying assumptions, statements regarding plans, objectives and expectations with respect to future production, operations, costs, projects, and statements regarding future performance. Forward-looking statements are generally identified by the words “plans,” “expects,” “anticipates,” “believes,” “intends,” “estimates” and other similar expressions. All forward-looking statements involve a number of risks, uncertainties and other factors, many of which are beyond the control of Acacia, which could cause actual results and developments to differ materially from those expressed in, or implied by, the forward-looking statements contained herein. Factors that could cause or contribute to differences between the actual results, performance and achievements of Acacia include, but are not limited to, changes or developments in political, economic or business conditions or national or local legislation or regulation in countries in which Acacia conducts - or may in the future conduct - business, industry trends, competition, fluctuations in the spot and forward price of gold or certain other commodity prices (such as copper and diesel), currency fluctuations (including the US dollar, South African rand, Kenyan shilling and Tanzanian shilling exchange rates), Acacia’s ability to successfully integrate acquisitions, Acacia’s ability to recover its reserves or develop new reserves, including its ability to convert its resources into reserves and its mineral potential into resources or reserves, and to process its mineral reserves successfully and in a timely manner, Acacia’s ability to complete land acquisitions required to support its mining activities, operational or technical difficulties which may occur in the context of mining activities, delays and technical challenges associated with the completion of projects, risk of trespass, theft and vandalism, changes in Acacia’s business strategy and ongoing implementation of operational reviews, as well as risks and hazards associated with the business of mineral exploration, development, mining and production and risks and factors affecting the gold mining industry in general. Although Acacia’s management believes that the expectations reflected in such forward-looking statements are reasonable, Acacia cannot give assurances that such statements will prove to be correct. Accordingly, investors should not place reliance on forward-looking statements contained in this announcement. Any forward-looking statements in this announcement only reflect information available at the time of preparation. Save as required under the Market Abuse Regulation or otherwise as may be required under applicable law, Acacia explicitly disclaims any obligation or undertaking publicly to update or revise any forward-looking statements in this announcement, whether as a result of new information, future events or otherwise. Nothing in this announcement should be construed as a profit forecast or estimate and no statement made should be interpreted to mean that Acacia’s profits or earnings per share for any future period will necessarily match or exceed its historical published profits or earnings per share.

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