20 October 2017

    Results for the 3 months ended 30 September 2017 (Unaudited)

    Based on IFRS and expressed in US Dollars (US$)

    Acacia Mining plc ("Acacia'') reports third quarter results

    "Our business has continued to be resilient in the face of the challenges in
    Tanzania and delivered production of 191,203 ounces during the quarter at
    all-in sustaining costs of US$939 per ounce sold", said Brad Gordon, Chief
    Executive Officer of Acacia Mining. "Whilst production at Buzwagi was
    especially pleasing, the continued restrictions on the export of gold/copper
    concentrate, together with a lack of refunds of VAT have further impacted our
    balance sheet, with our cash position falling to US$95 million at the end of
    the quarter. In order to preserve our balance sheet and the long-term viability
    of our business we took a range of actions including the transition of
    Bulyanhulu to a reduced operational state, changing the processing flow sheet
    at Buzwagi to enable the mine to sell all of the gold it produces, and securing
    a US$1,300/oz floor price for the majority of our gold sales until February
    2018. We note yesterday's announcement that a framework agreement has been
    signed, which highlights the progress in the discussions between Barrick Gold
    Corporation and the Government of Tanzania. We continue to seek further
    clarification on the agreement and as yet no formal proposal has been put to
    Acacia."

    Operational Highlights

      * Gold production of 191,203 ounces, 7% lower than Q3 2016, with gold sales
        of 132,787 ounces
      * AISC1 of US$939 per ounce sold, 6% below Q3 2016 and cash costs1 of US$616
        per ounce sold, 3% higher than Q3 2016
          + Q3 AISC, assuming sales ounces equalled Q3 production, would have been
            approximately US$820 per ounce
      * Bulyanhulu commenced the transition to Reduced Operations ("ROP"),
        announced in September, and process is ahead of schedule
      * Buzwagi completed a processing trial in September and will only produce
        saleable gold doré for the rest of the mine's life

    Financial Highlights

      * Q3 revenue of US$171 million, 40% lower than Q3 2016, impacted by the ban
        on concentrate exports, resulting in the loss of gross revenue during the
        quarter of approximately US$90 million
      * Q3 EBITDA1 of US$50 million, 60% lower than Q3 2016, mainly due to the
        lower sales, with adjusted EBITDA of US$77 million
      * Net earnings1 of US$16 million (US3.9 cents per share), down from US$53
        million in Q3 2016, with adjusted net earnings of US$35 million, down 32%
        from Q3 2016
      * Paid corporate tax relating to North Mara of US$9 million in Q3, bringing
        year-to-date provisional corporate tax paid to US$26 million

      * Cash on hand of US$95 million as of 30 September with net cash of US$24
        million
      * US$23 million of Bulyanhulu ROP costs, primarily related to contract exits
        and retrenchments, were accrued in Q3 2017 and treated as other charges,
        with majority of cash flow impact together with expected working capital
        outflows due in Q4 2017

                                              Three months ended 30    Nine months ended   
                                                    September             30 September     
                                                                                           
    (Unaudited)                                      2017      2016          2017      2016
                                                                                           
    Gold production (ounces)                      191,203   204,726       619,406   616,751
                                                                                           
    Gold sold (ounces)                            132,787   206,488       445,225   607,451
                                                                                           
    Cash cost (US$/ounce)1                            616       598           588       626
                                                                                           
    AISC (US$/ounce)1                                 939       998           907       961
                                                                                           
    Net average realised gold price (US$/           1,279     1,330         1,248     1,250
    ounce)1                                                                                
                                                                                           
    (in US$'000)                                                                           
                                                                                           
    Revenue                                       170,602   284,695       562,266   789,642
                                                                                           
    EBITDA 1                                       50,302   124,825       211,717   309,707
                                                                                           
    Adjusted EBITDA1                               76,695   122,125       242,914   302,624
                                                                                           
    Net earnings                                   16,038    52,787        78,581    46,659
                                                                                           
    Basic earnings per share (EPS) (cents)            3.9      12.9          19.2      11.4
                                                                                           
    Adjusted net earnings1                         34,513    50,898       100,419   109,665
                                                                                           
    Adjusted net earnings per share (AEPS)            8.4      12.4          24.5      26.8
    (cents)1                                                                               
                                                                                           
    Cash (used in)/generated from operating      (22,784)    99,947      (21,469)   257,043
    activities                                                                             
                                                                                           
    Capital expenditure2                           35,619    52,900       128,075   138,072
                                                                                           
    Cash balance                                   95,321   302,061        95,321   302,061
                                                                                           
    Total borrowings                               71,000    99,400        71,000    99,400
                                                                                           

       1 These are non-IFRS measures. Refer to page 15 for definitions   2 Excludes
    non-cash capital adjustments (reclamation asset adjustments) and include land
    purchases recognised as long term prepayments

    Other Developments

    Update on Discussions between Barrick Gold Corporation and the Government of
    Tanzania

    In late July, the Government of Tanzania ("GoT") and Barrick Gold Corporation
    ("Barrick"), Acacia's majority shareholder, commenced discussions with the aim
    of resolving the current situation. As previously announced, the GoT and
    Barrick, hosted a press conference in Tanzania yesterday to provide an update
    on the ongoing discussions. Acacia has received a copy of the framework
    agreement referred to in Barrick's two releases on 19 October and is seeking
    further clarification. No formal proposal has been put to Acacia for
    consideration at this point in time. As stated at the press conference, any
    proposal agreed in principle between Barrick and the GoT will require Acacia's
    approval.  Acacia will consider any proposal once it receives the full details
    and a further update will be provided when appropriate.

    Bulyanhulu Reduced Operations

    In September 2017, Acacia decided to transition Bulyanhulu to Reduced
    Operations in order to preserve the viability of our business over the longer
    term. This decision was a direct result of the concentrate export ban and the
    deterioration of the operating environment in Tanzania as discussed below which
    together led to negative cash flow of approximately US$15 million per month at
    the mine, making normal operations at Bulyanhulu unsustainable. The ROP
    programme includes the preservation of all assets and equipment to enable the
    mine to resume underground operations in a timely manner should the export ban
    be lifted and the operating environment in Tanzania stabilise. The transition
    to ROP is expected to be complete in December and is tracking ahead of
    schedule, with all underground mining and the processing of underground ore
    having ceased.

    The process is expected to include total one-off costs of around US$25 million,
    with US$23 million of the costs accrued during Q3 2017. These primarily
    comprise US$16 million of employment severance costs and US$5 million of
    contract exit costs. Approximately US$2 million has been paid in Q3 2017, with
    the balance due in Q4 2017. In addition there will be a natural cash outflow of
    US$35 - US$40 million due to working capital outflows which will be incurred in
    Q4 2017. The mine will also incur an average of US$5 million of operational
    cash outflows per month during the transition period before reaching a steady
    state of approximately US$3 million a month in December.

    These costs are expected to be partly offset by the revenue from the
    retreatment of tailings, which is expected to re-commence during Q4 2017 once
    sufficient rainfall has been received in the region. Once operational, we
    expect this to deliver production of approximately 30,000 to 35,000 ounces of
    saleable doré per annum.

    Bulyanhulu Carrying Value Review

    The decision taken to transition Bulyanhulu to ROP during the quarter has
    driven the need to undertake a carrying value review to determine whether the
    recoverable amount of Bulyanhulu exceeds its carrying value. In the absence of
    clarity at this stage over the future operating conditions in Tanzania, for the
    purpose of the review we have assumed that the underground mine restarts in
    early 2019 and is able to export gold/copper concentrate and the only change to
    the fiscal regime is the increased royalty and clearing fee (movement from 4%
    to 7%) that was legislated earlier this year and which Acacia agreed to pay
    under protest. Our other key assumptions around gold price and discount rate
    remains unchanged from those used in the carrying value review performed in
    June 2017.

    Based on these assumptions it was determined that sufficient headroom exists,
    and as a result, no impairment losses have been recognised at this stage. Our
    assumptions do not take into account any impact of a negotiated settlement
    reached as a result of the negotiations underway between the Government of
    Tanzania and Barrick relating to the current in-country matters, as the terms
    of any possible settlement are currently not known. We are in the process of
    updating our life-of-mine plans and will run a further review of Bulyanhulu in
    light of these as well as any other potential changes to the operating and
    financial parameters, and will provide an update in due course.

    As was the case with the carrying value review performed in June 2017, we have
    assessed reasonably possible sensitivities and they likewise do not result in
    any impairment of carrying value.

    Buzwagi Processing Changes

    As previously announced, following a processing trial, Buzwagi made a change to
    its processing flow sheet in September so that going forward, all of the
    recovered gold at the mine will be saleable doré. Previously, Buzwagi produced
    both doré and gold/copper concentrate and during 2017, gold/copper concentrate
    has accounted for approximately 65% of Buzwagi's gold production. Since 3 March
    2017, however, the mine has been unable to export and sell its concentrate, and
    as such has only been selling approximately 35% of its gold production, whilst
    incurring 100% of the cost of production. With the processing change which
    requires the additional use of reagents in the leaching circuit at limited
    additional operating costs, the mine should be able to achieve gold recoveries
    of around 85% in Q4 2017, and sell an additional 8,000 - 10,000 ounces per
    month for the remainder of the year. Buzwagi previously planned to end
    concentrate production in Q2 2018, though as a result of the trial, the mine
    will only produce doré from now until the end of its life in 2020.

    Update on Tanzanian Operating Environment

    As previously announced, on 3 March 2017, the Ministry of Energy and Minerals
    of the Tanzanian Government announced a general ban on the export of metallic
    mineral concentrates. Since the export ban was imposed, impacting approximately
    35% of year to date group production, Acacia has seen a build-up of
    approximately US$270 million of concentrate inventory in Tanzania, based on
    current prices, with approximately 186,000 ounces of gold, 12.1 million pounds
    of copper and 159,000 ounces of silver contained in the unsold concentrate. As
    a result of the transition to ROP at Bulyanhulu, and the changes to the process
    flow sheet at Buzwagi, all of Acacia's mines are now solely producing doré, and
    as such we will not see further build-up in concentrate, although as previously
    disclosed this will result in less gold production than previously expected for
    2017. Acacia therefore expects to be able to sell all of the gold that it
    produces going forward even if there is no change to the status of the export
    ban on concentrate.

    In early July, new legislation came into force which made significant changes
    to the legal and regulatory framework governing the natural resources sector as
    a whole in Tanzania. Acacia continues to monitor the impact of the new
    legislation in light of its Mineral Development Agreements ("MDAs") with the
    Government of Tanzania. However, to minimise further disruptions to our
    operations we are, in the interim, satisfying the requirements imposed as
    regards the increased royalty rate applicable to metallic minerals such as
    gold, copper and silver of 6% (increased from 4%), in addition to the recently
    imposed 1% clearing fee on exports. These payments are being made under
    protest, without prejudice to our legal rights under the MDAs.

    International Arbitration Process

    As previously reported Bulyanhulu Gold Mine Limited ("BGML"), the owner and
    operator of the Bulyanhulu mine, and Pangea Minerals Limited ("PML"), the owner
    and operator of the Buzwagi mine have each referred their current disputes with
    the Government of Tanzania to arbitration in accordance with the dispute
    resolution processes agreed by the Government in its MDAs with BGML and PML.
    The commencement of arbitration was necessary to protect the rights of BGML and
    PML, although Acacia remains of the view that a negotiated resolution is the
    preferred outcome to the current disputes and the Company will continue to work
    to achieve this.

    Receipt of corporate tax assessments

    As previously announced, BGML and PML have received a series of Notices of
    Adjusted and Jeopardy Assessments (the "Assessments") from the Tanzania Revenue
    Authority ("TRA") for corporate income tax, covering the periods 2000 to 2017
    for BGML and 2007 to 2017 for PML. The Assessments were issued in respect of
    alleged under-declared export revenues, and appear to follow on from the
    findings of the First Presidential Committee announced on 24 May 2017, and the
    Second Presidential Committee announced on 12 June 2017. As we have stated
    previously, Acacia refutes each set of findings and re-iterates that it has
    fully declared all revenues. We have yet to receive copies of the reports
    issued by the First and Second Presidential Committees. The allegations made by
    the First and Second Committees are included in the matters that both BGML and
    PML have already referred to international arbitration.

    The Assessments assert that BGML owes the Government a total of approximately
    US$154 billion, and PML approximately US$36 billion. The Assessments claim a
    total of approximately US$40 billion of alleged unpaid taxes and approximately
    US$150 billion of penalties and interest owed. Acacia is in the process of
    disputing these Assessments and has requested the TRA's supporting
    calculations, which have not yet been received.

    In addition, post period end, PML was served with notices of adjusted corporate
    income tax and withholding tax assessments for tax years 2005 to 2011 with
    respect to the Tulawaka JV which was previously owned by PML. In 2014, the mine
    was transferred by PML to the Tanzanian state mining company (Stamico) in an
    attempt to support the development of a domestic mining industry. The new
    assessments appear to total approximately US$3 billion. Interest and penalties
    represent the vast majority of the new assessments. The TRA has not provided
    PML with any explanations or reasons for the adjusted assessments, or with the
    TRA's position on how the assessments have been calculated or why they have
    been issued.  Acacia is in the process of disputing these assessments.

    Indirect Taxation

    During the third quarter, Acacia incurred a further US$23 million of VAT
    outflows and received no VAT refunds, which together with the outflow in H1
    2017 has led to a total VAT outflow year to date of approximately US$74
    million. As a result, our total indirect tax receivables have increased to
    approximately US$175 million as at 30 September 2017.  Approximately US$10
    million is able to be offset against future North Mara corporate tax payments
    under a historic memorandum of settlement.

    As previously disclosed, the new legislation included an Amendment to the VAT
    Act 2015 so that no input tax credit can be claimed for the exportation of raw
    minerals, with effect from 20 July 2017. Bulyanhulu and Buzwagi have now
    received notices from the TRA that they are not eligible for any VAT relief
    from July 2017 on the basis that all production (both doré and concentrate) are
    "raw minerals".  At this stage there has been no equivalent notification at
    North Mara. Acacia disputes this as a matter of law and as a matter that is in
    contravention of the relevant terms of the MDAs.

    Contribution to Tanzania

    Tax Contribution

    In the third quarter of 2017, Acacia paid a total of US$35 million of taxes and
    royalties to the Tanzanian Revenue Authority. This is made up of provisional
    corporate tax payments of US$9 million, final taxes due on North Mara's 2016
    income tax assessment of US$3 million, royalties of US$12 million, payroll
    taxes of US$7 million and other taxes of US$4 million. If the gold/copper
    concentrate produced during the quarter was sold then approximately a further
    US$6 million would have been paid in royalties. The provisional corporate tax
    and final income tax payments have been offset against the indirect tax
    receivable under the existing Memorandum of Settlement ("MOS") entered into
    with the Tanzanian Government.

    Sustainable Contribution

    By the end of Q3, Acacia's Sustainable Communities team had either started or
    completed 75% of the 24 infrastructure projects planned for 2017. Despite the
    challenging operating environment, Acacia has remained committed to its 2017
    sustainable initiatives in and around its operations. In Q3, the following were
    the major projects implemented at each site:

      * Bulyanhulu: The mine is continuing the construction of the Bugarama Health
        Centre Phase 2. This project will cost US $532,000, with the mine
        contributing US$500,000 and the Msalala District Council contributing
        US$32,000. Phase 1 of the project was completed in 2016 at a cost of
        US$470,000. Phase 2 will add a general ward and an operating theatre to the
        clinic facilities. The health centre is a private-public partnership
        between the mine and Msalala District Council, which is managing the
        facility, and is responsible for staffing, furnishing, drugs supply and
        maintenance. In addition, we continued our partnership under the Joint
        Water Project Partnership with the Ministry of Water and Irrigation and the
        Districts of Msalala, Nyang'hwale and Shinyanga.
      * Buzwagi: At Buzwagi, we are close to completing the construction of the
        first of two dormitories at Mwendakulima Secondary School at a cost of
        almost US$100,000. The second wing will be started in Q4 at a similar cost.
        In addition, the mine completed its tree planting campaign of 400,000 trees
        at various areas within and outside the mining lease. A further 500,000
        seedlings are now being raised at a nursery for a rehabilitation programme
        to start during the coming wet season.
      * North Mara: During the quarter, we constructed and renovated 2 schools -
        Bwirege Secondary School and Genkuru Primary School at a total cost of over
        US$400,000. This will benefit approximately 1,500 students.

    Other development projects in the last quarter include continued support to
    2,700 students with uniforms and books under the CanEducate program and
    supporting sports through 3 coaching clinics in partnership with Sunderland
    Football Club that reached over 65 male and female coaches. We also
    strengthened our monitoring and evaluation of the development (livelihoods)
    projects under implementation to ensure we achieve the intended objectives.

    As part of improving the quality of education, we signed an MoU with Read
    International Tanzania to refurbish 6 libraries (2 per mine site, with 1
    belonging to a school and 1 within the community) as well as train teachers on
    how to effectively use libraries in order to encourage a reading culture. 
    University students are selected and trained to be volunteers in managing these
    facilities. The programme identifies existing infrastructure to use as
    libraries thus creating ownership of the facility by the school or community.
    All six libraries will be handed over at the end of November.

    During the reporting period, Dalberg, a development consultant, conducted
    scoping studies into Agriculture and SME development and the final report
    preparation is underway. Some of the emerging findings suggest that whilst
    agriculture is the key economic activity employing approximately 70% of the
    population around our mine sites, access to water is the key challenge. In
    order to catalyse economic growth in the agriculture sector, the greatest
    potential for impact would be in addressing cross cutting challenges on water
    access, good agricultural practice training, market linkages, and access to
    inputs. In addition, investment in SME capacity building for product
    differentiation and access to markets will enhance the performance of local
    SMEs and diversify the local economy which will contribute to thriving local
    economies. All the above activities are aligned to our Sustainable Communities
    strategy and local development plans.

    Entry into Gold Price Protection Measures

    In September, as part of on-going measures to mitigate cash outflows, Acacia
    bought put options covering 210,000 ounces of gold at a strike price of
    US$1,300 per ounce. The total cost of the options was US$3.2 million and they
    provide a minimum price for the majority of Acacia's planned doré production
    until February 2018 above our budgeted gold price of US$1,200 per ounce, with
    full upside exposure should the gold price trade above US$1,300 per ounce. The
    options will expire in equal instalments of 35,000 ounces per month over the
    period.

    Management Changes

    Post period end, Mark Morcombe, Chief Operating Officer, notified the Company
    that he will resign from his position at the end of the year. Mark has made
    significant contributions to the company's operating performance during his 18
    months in the position and the company wishes him well in his future
    endeavours.  We will provide further information on plans for his replacement
    when available.

    Outlook

    As previously announced, as a result of the reduction in operating activity at
    Bulyanhulu, Acacia expects annual production to be in the order of 750,000
    ounces, 100,000 ounces lower than the bottom of the previous guidance range of
    850,000-900,000 ounces. This revised guidance is based on limited production
    occurring beyond August at Bulyanhulu and marginally lower production at North
    Mara than previously planned due to underground development delays as a result
    of work permit issues for key contractors. The transition to production of gold
    doré only at Buzwagi is not expected to impact guidance.

    Previous AISC guidance of between US$880-920 per ounce sold remains unchanged
    (with cash costs per ounce sold of US$580-620 also unchanged) due to the impact
    of on-going cost-saving initiatives and a further reduction in capital
    expenditure guidance to approximately US$160 million. The one-off and on-going
    costs of the reduced operational state at Bulyanhulu are not included in our
    AISC calculation, though the ongoing tailings retreatment costs are included.

    Acacia is committed to strong cost discipline and is continuing to take steps
    to ensure the long-term viability of our business whilst we await an outcome of
    the discussions between Barrick and Government of Tanzania. During the third
    quarter Acacia made significant changes to both the Bulyanhulu and Buzwagi
    operations in order to preserve our balance sheet and ensure that we are able
    to sell all of the gold we produce going forward. These changes, together with
    the purchase of put options to achieve a floor price of US$1,300 per ounce for
    the majority of our production are expected to enable the Group to return to
    positive cash generation in early 2018. We continue to evaluate further steps
    to protect our balance sheet including a reduction in corporate overheads,
    expansionary drilling at North Mara and greenfield exploration activity.

    Key Statistics                           Three months ended      Nine months ended 30
                                                30 September              September      
                                                                                         
    (Unaudited)                                  2017       2016          2017       2016
                                                                                         
    Tonnes mined                      Kt        8,608      9,501        26,647     28,847
                                                                                         
    Ore tonnes mined                  Kt        4,221      2,146        11,433      6,835
                                                                                         
    Ore tonnes processed              Kt        2,004      2,351         6,864      7,251
                                                                                         
    Process recovery rate exc.        %         91.7%      91.8%         92.7%      92.2%
    tailings reclaim                                                                     
                                                                                         
    Head grade exc. tailings reclaim  g/t         3.3        3.4           3.4        3.3
                                                                                         
    Process recovery rate inc.        %         90.9%      87.5%         90.0%      88.4%
    tailings reclaim                                                                     
                                                                                         
    Head grade inc. tailings reclaim  g/t         3.3        3.1           3.1        3.0
                                                                                         
    Gold production                   oz      191,203    204,726       619,406    616,751
                                                                                         
    Gold sold                         oz      132,787    206,488       445,225    607,451
                                                                                         
    Copper production                 Klbs      3,832      3,557        12,897     11,984
                                                                                         
    Copper sold3                      Klbs         37      3,277         1,341     11,361
                                                                                         
    Cash cost per tonne milled exc.   US$/t        41         61            42         60
    tailings reclaim1                                                                    
                                                                                         
    Cash cost per tonne milled inc.   US$/t        41         53            38         52
    tailings reclaim1                                                                    
                                                                                         
    Per ounce data                                                                       
                                                                                         
         Average spot gold price2     US$/oz    1,278      1,335         1,251      1,260
                                                                                         
         Net average realised gold    US$/oz    1,279      1,330         1,248      1,250
    price1                                                                               
                                                                                         
         Total cash cost1             US$/oz      616        598           588        626
                                                                                         
         All-in sustaining cost1      US$/oz      939        998           907        961
                                                                                         
    Average realised copper price     US$/       2.68       2.17          2.98       2.14
                                      lbs                                                

    Financial results

                                              Three months ended 30     Nine months ended 
                                                    September             30 September    
                                                                                          
    (Unaudited, in US$'000 unless otherwise        2017        2016         2017      2016
    stated)                                                                               
                                                                                          
    Revenue                                     170,602     284,695      562,266   789,642
                                                                                          
    Cost of sales                             (105,538)   (175,327)    (349,505) (530,766)
                                                                                          
    Gross profit                                 65,064     109,368      212,761   258,876
                                                                                          
    Corporate administration                    (6,780)     (5,906)     (19,300)  (15,677)
                                                                                          
    Share based payments                            637    (20,089)        8,422  (39,724)
                                                                                          
    Exploration and evaluation costs            (5,295)     (5,540)     (21,445)  (16,690)
                                                                                          
    Corporate social responsibility expenses    (2,120)     (2,983)      (5,859)   (7,597)
                                                                                          
    Other (charges)/income                     (24,186)       8,273     (43,803)    10,441
                                                                                          
    Profit before net finance expense and        27,320      83,123      130,776   189,629
    taxation                                                                              
                                                                                          
    Finance income                                  261         657        1,804     1,147
                                                                                          
    Finance expense                             (2,982)     (3,023)      (8,436)   (8,403)
                                                                                          
    Profit before taxation                       24,599      80,757      124,144   182,373
                                                                                          
    Tax expense                                 (8,561)    (27,970)     (45,563) (135,714)
                                                                                          
    Net profit for the period                    16,038      52,787       78,581    46,659

    1 These are non-IFRS financial performance measures with no standard meaning
    under IFRS. Refer to "Non IFRS measures" on page 15 for definitions.

    2 Reflect the London PM fix price.

    3 Q3 2017 sales quantities relate to final sales adjustments of copper sales
    recorded during Q1 2017.

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

    Acacia Mining plc                             +44 (0) 207 129 7150                         

    Brad Gordon, Chief Executive Officer

    Andrew Wray, Chief Financial Officer

    Giles Blackham, Investor Relations

    Camarco                                       +44 (0) 20 3757 4980                         

    Gordon Poole / Billy Clegg / Nick Hennis

    About Acacia Mining plc

    Acacia Mining plc (LSE:ACA) is Tanzania's largest gold miner and one of the
    largest producers of gold in Africa. We have three mines, all located in
    north-west Tanzania: Bulyanhulu, Buzwagi, and North Mara and 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.
    Acacia reports in US dollars and in accordance with IFRS as adopted by the
    European Union, unless otherwise stated in this report.

    Conference call

    A conference call will be held for analysts and investors on 20 October 2017 at
    09:00 AM London time.

    The access details for the conference call are as follows:

          Participant dial in:           +44 20 3059 8125

          Password:                       Acacia Mining

    A recording of the conference call will be made available on the Company's
    website, www.acaciamining.com, after the call.

    FORWARD- LOOKING STATEMENTS

    This report includes "forward-looking statements" that express or imply
    expectations of future events or results. Forward-looking statements are
    statements that are not historical facts. These statements include, without
    limitation, 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 in this report.
    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
    including, the 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 report.

    Any forward-looking statements in this report only reflect information
    available at the time of preparation. Save as required under the Market Abuse
    Regulation or otherwise under applicable law, Acacia explicitly disclaims any
    obligation or undertaking publicly to update or revise any forward-looking
    statements in this report, whether as a result of new information, future
    events or otherwise. Nothing in this report 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 the historical published profits or earnings per share of
    Acacia.

    Operating Review

    Acacia delivered production of 191,203 in Q3 2017, a decrease of 7% compared to
    the prior year quarter, whilst AISC of US$939 per ounce sold was 6% lower
    compared to Q3 2016 despite a lower production base. Cash costs of US$616 per
    ounce sold were 3% higher than the prior year period. For reference purposes,
    if Q3 sales ounces equalled Q3 production, AISC would have been approximately
    US$820 per ounce and cash costs would have been approximately US$600 per ounce.

    North Mara achieved gold production of 72,011 ounces for the quarter, 36% lower
    than in Q3 2016, which was a record quarter. Whilst the Gokona underground mine
    contributed more ore tonnes than in Q3 2016, they were at lower grades as a
    result of delays in receiving work permits for our international development
    contractors which impacted on underground development and delayed the
    development of higher grade stopes, together with a focus on the lower grade
    West Zone. Gold ounces sold for the quarter of 74,585 ounces were 34% lower
    than the prior year quarter and broadly in line with the corresponding decrease
    in production. AISC increased by 32% to US$864 per ounce sold predominantly due
    to the lower production base.

    Buzwagi produced 69,097 ounces, which was 74% higher than Q3 2016 due to an 83%
    increase in head grade as a result of higher grade ore mined from the main ore
    zone at the bottom of the pit in Q3 2017. AISC per ounce sold of US$695 was 35%
    lower than Q3 2016 (US$1,076/oz), mainly driven by the higher production base.

    At Bulyanhulu, gold production of 50,094 ounces was 5% lower than Q3 2016,
    despite a 12% increase in production from underground mining. As expected,
    there was limited production during September 2017 after the decision to
    transition Bulyanhulu into reduced operations. Production for the quarter was
    also negatively impacted by continued drought in the Kahama district which
    resulted in a temporary halt in production from reprocessed tailings. AISC per
    ounce sold for the quarter of US$1,365 was 5% higher than Q3 2016 (US$1,300)
    mainly driven by the impact of lower sales ounces due to the inability to
    export metallic mineral concentrates, partly offset by lower overall direct
    mining costs due to the reduced operations programme.

    Total tonnes mined during the quarter amounted to 8.6 million tonnes, 9% lower
    than Q3 2016, mainly as a result of a 16% decrease in total tonnes mined at
    Buzwagi driven by lower waste movement as we getting closer to bottom of the
    pit. Ore tonnes mined of 4.2 million tonnes were 97% higher than Q3 2016 mainly
    due to higher ore tonnes from Buzwagi and North Mara (from both the Nyabirama
    open pit and the Gokona Underground).

    Ore tonnes processed amounted to 2.0 million tonnes, a decrease of 15% on Q3
    2016, resulting mainly from the temporary halt of the tailings retreatment at
    Bulyanhulu. The lower ore tonnes processed, combined with a 3% decrease in head
    grade, drove production 7% lower compared to Q3 2016 as set out above.

    Cash costs of US$616 per ounce sold for the quarter were 3% higher than in Q3
    2016, primarily due to:

      * Lower capitalisation of development costs mainly at Bulyanhulu due to
        delays in underground waste development activity and at North Mara due to
        lower waste stripping at Nyabirama (US$107/oz);
      * Lower co-product revenue as a result of the gold/copper concentrate export
        ban (US$60/oz); and
      * Lower production base (US$123/oz); offset by
      * Increased build-up of ore stockpiles at Buzwagi, as a result of the
        increased ore tonnes mined (US$111/oz);
      * Lower overall direct mining cost mainly at Bulyanhulu driven by lower
        underground activities (US$113/oz); and
      * Lower sales related cost driven by lower sales volumes, despite increased
        royalty rates and additional clearance fees charged (US$36/oz).


    Included in cash cost for the quarter, and ultimately cost of sales, is a
    credit of approximately US$32.1 million (US$209/oz) relating to the build-up of
    finished gold inventory due to concentrate sales delays which largely offsets
    the impact of the reduction in sales ounces in the cash cost per ounce sold
    calculation.

    All-in sustaining cost of US$939 per ounce sold for the quarter was 6% lower
    than Q3 2016, despite the lag in sales against production. This was driven by
    the impact of a much lower revaluation charge relating to future share-based
    payments compared to Q3 2016 (US$156/oz) and lower capitalised development
    costs at both Bulyanhulu and North Mara (US$141/oz), partly offset by the
    impact of lower sales ounces on individual cost items (US$222/oz) and the
    higher cash costs as discussed above (US$18/oz).

    If our sales ounces equalled production, AISC for the quarter would have been
    approximately US$820 per ounce sold, compared to US$1,028 per ounce sold on the
    same basis in Q3 2016, a decrease of 20%.

    Capital expenditure amounted to US$35.6 million compared to US$52.9 million in
    Q3 2016, the decrease mainly driven by lower capitalised development costs.
    Capital expenditure primarily comprised of capitalised development and
    stripping (US$22.6 million), expansion of the tailings storage facility and ore
    dumps at Buzwagi and North Mara (US$3.6 million), investment in mobile
    equipment and component change-outs at North Mara and Bulyanhulu (US$2.5
    million) and capitalised drilling mainly for resource and reserve development
    at North Mara's Gokona underground (US$2.4 million).

    Mine Site Review

    Bulyanhulu

    Key statistics

                                            Three months ended 30     Nine months ended 
                                                  September             30 September    
                                                                                        
    (Unaudited)                                    2017       2016        2017      2016
                                                                                        
    Key operational information:                                                        
                                                                                        
    Ounces produced                oz            50,094     52,504     172,636   209,573
                                                                                        
    Ounces sold                    oz            26,265     53,764     107,479   204,483
                                                                                        
    Cash cost per ounce sold1      US$/oz           863        808         812       700
                                                                                        
    AISC per ounce sold1           US$/oz         1,365      1,300       1,346     1,057
                                                                                        
    Copper production              Klbs           1,095      1,157       3,906     4,684
                                                                                        
    Copper sold2                   Klbs            (11)      1,107         588     4,261
                                                                                        
    Run-of-mine:                                                                        
                                                                                        
    Underground ore tonnes hoisted Kt               187        186         596       665
                                                                                        
    Ore milled                     Kt               189        168         612       670
                                                                                        
    Head grade                     g/t              9.0        9.4         8.6       9.3
                                                                                        
    Mill recovery                  %              88.9%      85.9%       90.1%     91.3%
                                                                                        
    Ounces produced                oz            48,683     43,661     153,279   183,744
                                                                                        
    Cash cost per tonne milled1    US$/t            104        228         124       192
                                                                                        
    Reprocessed tailings:                                                               
                                                                                        
    Ore milled                     Kt                82        419         905     1,199
                                                                                        
    Head grade                     g/t              1.3        1.5         1.4       1.5
                                                                                        
    Mill recovery                  %              42.0%      44.3%       46.8%     45.3%
                                                                                        
    Ounces produced                oz             1,411      8,843      19,356    25,829
                                                                                        
    Capital Expenditure                                                                 
                                                                                        
     - Sustaining capital          US$            2,881      4,892      11,480    16,398
                                   ('000)                                               
                                                                                        
     - Capitalised development     US$            8,152     18,648      39,206    47,086
                                   ('000)                                               
                                                                                        
     - Expansionary capital        US$               57        321       1,039     1,074
                                   ('000)                                               
                                                                                        
                                                 11,090     23,861      51,725    64,558
                                                                                        
     - Non-cash reclamation asset  US$              386    (3,062)         577     6,875
    adjustments                    ('000)                                               
                                                                                        
    Total capital expenditure      US$           11,476     20,799      52,302    71,433
                                   ('000)                                               

    1These are non-IFRS financial performance measures with no standard meaning
    under IFRS. Refer to 'Non-IFRS measures" on page 17 for definitions.

    2Q3 2017 sales quantities relate to final sales adjustments of copper sales
    recorded during Q1 2017.

    Operating performance

    Gold production amounted to 50,094 ounces, which was 5% lower than Q3 2016,
    despite a 12% increase in production from underground mining. As expected,
    limited production occurred during September following the decision to
    transition Bulyanhulu into reduced operations. Production for the quarter was
    also negatively impacted by continued drought in the Kahama district which
    resulted in a temporary halt in production from reprocessed tailings, which
    meant we lost about 6,000 ounces of production from reprocessing of tailings.
    The reprocessing of tailings is expected to re-start in Q4 2017, assuming
    adequate rainfall is received. Production during the quarter comprised 24,677
    ounces of gold in concentrate and 25,417 ounces of gold in doré.

    Gold sold for the quarter of 26,265 ounces, was 48% lower than production and
    51% lower than Q3 2016 mainly as a result of the inability to export
    concentrate, combined with the lower production base.

    Copper production of 1.1 million pounds for the quarter was 5% lower than Q3
    2016 mainly driven by lower copper grades. There were no copper sales recorded
    during the quarter due to the lack of exports of concentrate. Negative sales
    quantities for the quarter relate to final sales adjustments of copper sales
    recorded during Q1 2017.

    Underground ore tonnes hoisted were in line with the comparative quarter
    despite ceasing underground activities in the middle of September, given that
    Q3 2016 included a two week shutdown of the vertical shaft.

    Cash costs of US$863 per ounce sold were 7% higher than Q3 2016 (US$808/oz),
    mainly due to the lower production base (US$356/oz), lower capitalised
    development costs (US$290/oz) and lower co-product revenue (US$115/oz), partly
    offset by lower overall direct mining cost driven by lower underground
    activities (US$523/oz), as well as lower sales related costs due to lower sales
    volumes (US$93/oz). Included in cash costs is a credit of approximately US$18.1
    million (US$594/oz) relating to the build-up of finished gold inventory as a
    result of concentrate sales delays.

    AISC per ounce sold for the quarter of US$1,365 was 5% higher than Q3 2016
    (US$1,300/oz) driven by the impact of lower sales ounces on individual cost
    items (US$515/oz) and higher cash costs as discussed above (US$55/oz), partly
    offset by lower capitalised development costs (US$400/oz) and lower sustaining
    capital expenditure (US$77/oz).

    Capital expenditure for the quarter before reclamation adjustments amounted to
    US$11.1 million, 54% lower than Q3 2016 (US$23.9 million), mainly driven by
    lower capitalised development due to lower waste development during the current
    quarter (US$10.5 million) as well as a decrease in sustaining capital
    expenditure (US$2.0 million).

    Capital expenditure mainly consisted of capitalised underground development
    costs (US$8.2 million), investment in mobile equipment and component
    change-outs (US$1.0 million) and investment in power infrastructure through
    construction of a STATCOM centre for increased power stability (US$0.5
    million).

    Buzwagi

    Key statistics

                                            Three months ended 30     Nine months ended 
                                                  September             30 September    
                                                                                        
    (Unaudited)                                    2017       2016        2017      2016
                                                                                        
    Key operational information:                                                        
                                                                                        
    Ounces produced                oz            69,097     39,699     195,181   119,918
                                                                                        
    Ounces sold                    oz            31,938     39,284      85,032   119,688
                                                                                        
    Cash cost per ounce sold1      US$/oz           564        986         647     1,030
                                                                                        
    AISC per ounce sold1           US$/oz           695      1,076         742     1,108
                                                                                        
    Copper production              Klbs           2,738      2,400       8,991     7,300
                                                                                        
    Copper sold2                   Klbs              47      2,171         752     7,100
                                                                                        
    Mining information:                                                                 
                                                                                        
    Tonnes mined                   Kt             4,259      5,072      13,823    16,495
                                                                                        
    Ore tonnes mined               Kt             3,037      1,203       7,988     3,808
                                                                                        
    Processing information:                                                             
                                                                                        
    Ore milled                     Kt             1,020      1,063       3,215     3,245
                                                                                        
    Head grade                     g/t              2.2        1.2         2.0       1.2
                                                                                        
    Mill recovery                  %              94.0%      94.4%       95.7%     94.5%
                                                                                        
    Cash cost per tonne milled1    US$/t             18         36          17        38
                                                                                        
    Capital Expenditure                                                                 
                                                                                        
     - Sustaining capital          US$            2,238      1,087       3,103     3,318
                                   ('000)                                               
                                                                                        
     - Capitalised development     US$                -          -           -         -
                                   ('000)                                               
                                                                                        
                                                  2,238      1,087       3,103     3,318
                                                                                        
     - Non-cash reclamation asset  US$              215    (1,795)         214     1,212
    adjustments                    ('000)                                               
                                                                                        
    Total capital expenditure      US$            2,453      (708)       3,317     4,530
                                   ('000)                                               

    1These are non-IFRS financial performance measures with no standard meaning
    under IFRS. Refer to "Non-IFRS measures" on page 17 for definitions.

    2 Q3 2017 sales quantities relate to final sales adjustments of copper sales
    recorded during Q1 2017.

    Operating performance

    Gold production for the quarter of 69,097 ounces was 74% higher than in Q3 2016
    due to an 83% increase in head grade as a result of higher grade ore mined from
    the main ore zone at the bottom of the pit in Q3 2017. Production during the
    quarter was comprised of 32,833 ounces of gold in concentrate and 36,264 ounces
    of gold in doré.

    Gold sold for the quarter of 31,938 ounces, was 54% lower than production and
    19% behind Q3 2016, primarily due to the inability to export concentrate,
    slightly offset by a higher production base. Sales are expected to normalise
    and align with production in Q4 2017 due to the changes to the process flow
    sheet in September meaning that Buzwagi will solely produce doré until the end
    of its life in 2020, although recoveries are expected to fall to around 85% in
    Q4.

    Buzwagi is also experiencing similar water shortages to Bulyanhulu. To date,
    the mine has been able to largely mitigate the lack of rainfall through use of
    its large water storage facilities and purchase of water from the local
    authority. However if the onset of the rainy season is significantly delayed
    there may be an impact to processing operations during the quarter.

    Copper production of 2.7 million pounds for the quarter was 14% higher than the
    prior quarter period, mainly due to increased copper grades. There were no
    copper sales recorded during the quarter due to the lack of exports of
    concentrate. Sales quantities for the quarter relate to final sales adjustments
    of copper sales recorded during Q1 2017.

    Total tonnes mined of 4.3 million tonnes were 16% lower than Q3 2016, primarily
    due to the reduced need for waste movement as the pit nears the end of its
    life. Ore tonnes mined were 153% higher than 2016 as a result of the same
    effect.

    Cash costs for the quarter of US$564 per ounce sold were significantly lower
    than Q3 2016 (US$986/oz), a decrease of 43%, primarily driven by the higher
    production base (US$181/oz), increased investment in ore stockpiles as a result
    of increased focus on ore mining (US$267/oz), lower direct mining cost (US$66/
    oz), partly offset by lower co-product revenue in the form of copper
    concentrates (US$157/oz). Included in cash costs is a credit of approximately
    US$15.7 million (US$408/oz) relating to the build-up of finished gold inventory
    as a result of concentrate sales delays.

    AISC per ounce sold of US$695 was 35% lower than the Q3 2016 (US$1,076/oz).
    This was mainly driven by the lower cash costs as discussed above (US$422/oz).

    Capital expenditure before reclamation adjustments amounted to US$2.2 million,
    more than double that spent in Q3 2016 (US$1.1 million), mainly consisting of
    the expansion of the tailings storage facility which started during Q3 2017
    (US$1.9 million).

    North Mara

    Key statistics

                                           Three months ended 30     Nine months ended 
                                                 September             30 September    
                                                                                       
    (Unaudited)                                   2017       2016        2017      2016
                                                                                       
    Key operational information:                                                       
                                                                                       
    Ounces produced               oz            72,011    112,523     251,589   287,260
                                                                                       
    Ounces sold                   oz            74,585    113,440     252,715   283,280
                                                                                       
    Cash cost per ounce sold1     US$/oz           550        364         473       402
                                                                                       
    AISC per ounce sold1          US$/oz           864        655         774       694
                                                                                       
    Open pit:                                                                          
                                                                                       
    Tonnes mined                  Kt             3,977      4,140      11,727    11,374
                                                                                       
    Ore tonnes mined              Kt               813        655       2,349     2,050
                                                                                       
    Mine grade                    g/t              1.6        2.0         1.8       1.9
                                                                                       
    Underground:                                                                       
                                                                                       
    Ore tonnes trammed            Kt               185        103         501       313
                                                                                       
    Mine grade                    g/t              7.9       23.1         8.6      15.6
                                                                                       
    Processing information:                                                            
                                                                                       
    Ore milled                    Kt               714        701       2,133     2,137
                                                                                       
    Head grade                    g/t              3.4        5.4         4.0       4.5
                                                                                       
    Mill recovery                 %              91.5%      92.8%       92.2%     91.9%
                                                                                       
    Cash cost per tonne milled1   US$/t             57         59          56        53
                                                                                       
    Capital Expenditure                                                                
                                                                                       
     - Sustaining capital2        US$            5,016      4,497      17,193    14,578
                                  ('000)                                               
                                                                                       
     - Capitalised development    US$           14,456     22,629      47,738    53,680
                                  ('000)                                               
                                                                                       
     - Expansionary capital       US$            2,442        466       6,931       924
                                  ('000)                                               
                                                                                       
                                                21,914     27,592      71,862    69,182
                                                                                       
     - Non-cash reclamation asset US$              430    (2,868)         374     3,384
    adjustments                   ('000)                                               
                                                                                       
    Total capital expenditure     US$           22,344     24,724      72,236    72,566
                                  ('000)                                               

    1These are non-IFRS financial performance measures with no standard meaning
    under IFRS. Refer to 'Non-IFRS measures" on page 17 for definitions.

    2 Includes land purchases recognised as long term prepayments.

    Operating performance

    North Mara achieved gold production of 72,011 ounces for the quarter, 36% lower
    than in Q3 2016. Whilst the Gokona underground mine contributed more ore tonnes
    than in Q3 2016, they were at lower grades as a result of delays in receiving
    work permits for our international development contractors which impacted on
    underground development and delayed the development of higher grade stopes,
    together with a focus on the lower grade West Zone. In addition, we have also
    seen lower grade ore mined from the Nyabirama pit as we worked through the
    Stage 4 cutback of the pit and we saw increased ore tonnes at lower grades
    following grade control drilling. Gold ounces sold for the quarter of 74,585
    ounces were 34% lower than the prior year quarter and broadly in line with the
    corresponding decrease in production.

    Cash costs of US$550 per ounce sold were 51% higher than Q3 2016 (US$364),
    mainly driven by the lower production base (US$190/oz) and lower capitalisation
    of development costs mainly due to lower waste stripping at Nyabirama open pit
    (US$88/oz), partly offset by an increased investment in ore stockpiles in Q3
    2017 (US$120/oz).

    AISC of US$864 per ounce sold was 32% higher than Q3 2016 (US$655/oz) as a
    result of higher cash costs discussed above (US$186/oz) and the impact of lower
    sales volumes (US$152/oz), partly offset by lower capitalised development costs
    (US$110/oz).

    Capital expenditure for the quarter, before reclamation adjustments, of US$21.9
    million was 21% lower than in Q3 2016 (US$27.6 million). Key capital
    expenditure include capitalised stripping costs (US$10.6 million), capitalised
    underground development costs (US$3.8 million), capitalised drilling mainly for
    resource and reserve development at Gokona underground (US$2.4 million),
    investment in mobile equipment and component change-outs (US$1.5 million) and
    expenditure relating to TSF and lower grade ore dumps (US$1.7 million).

    Exploration Review

    Brownfield Exploration

    North Mara - Gokona Underground

    A total of 55 holes for 11,503 metres of extension and infill drilling were
    completed at Gokona underground during the third quarter (18,766 metres year to
    date), with a further 76 holes for 6,238m of grade control drilling undertaken
    (22,319 metres year to date). Extensive drilling was undertaken during the
    quarter to further delineate the western extension of the "Golden Banana" (East
    Zone) lode mineralisation between the Gokona Fault and the completed Gokona
    open pit. This zone is now known as "GB2" zone, and further wide and high grade
    intercepts continued to be returned from drilling, including but not limited
    to:

      * UGKD00341      35m @ 6.6 g/t Au from 35m    
                                                    
      * UGKD00349      10m @ 75.7 g/t Au from 64m   
                                                    
      * UGKD00326      22m @ 13.0 g/t Au from 49m   
                                                    
      * UGKD00328      52m @ 11.4g/t Au from 35m    
                                                    
      * UGKD00329      34m @ 8.4 g/t Au from 40m    
                                                    
      * UGKD00331      57m @ 31.8 g/t Au from 54m   
                                                    
      * UGKD_00306     32m @ 8.4g/t Au from 120m    
                                                    
      * UKGC_00334     12m @ 10.6g/t Au from 23m    
                                                    
      * UKGC_00353     23m @ 21.8 g/t Au from 53m   
                                                    
      * UKGC_00357     10m @ 17.2 g/t Au from 58m   
                                                    
      * UKGC_00386     11m @ 11.2 g/t Au from 75m   
                                                    

    Additionally, a programme of drilling was conducted to test for continuation of
    the eastern extremity of the main "Golden Banana" mineralisation, with several
    significant intersections returned showing that the zone may be extended to the
    east outside delineated resources.  Better results included:

      * UKGC_00361     11m @ 5.0 g/t Au from 18m    
                                                    
      * UKGC_00362       6m @ 6.7 g/t Au from 20m   
                                                    
      * UKGC_00364     11m @ 6.7 g/t Au from 23m    
                                                    
      * UKGC_00365       9m @ 7.4 g/t Au from 26m   
                                                    
      * UKGC_00366       8m @ 7.2 g/t Au from 30m   

    A programme of drilling was also conducted to test for offset continuation, at
    depth, below the interpreted low-angle fault that locally terminates the
    "Golden Banana" mineralisation.  Drilling in the quarter was successful at
    confirming the continuation of high grade gold mineralisation, with two holes
    retuning significant intersections from an area cross-cut by a series of later
    dykes, including:

      * UGKD339               9m @ 35.1 g/t Au from 162m
      * UGKD340             16m @ 19.7 g/t Au from 177m
      * UGKD340               1m @ 107.0 g/t Au from 207m

    Three underground diamond drill rigs were moved to the newly completed drill
    drive at the 1030mRL elevation, and will commence drilling of the Gokona
    Central area in the fourth quarter; with initial drilling testing
    mineralisation beneath the existing Gokona open pit. The latest planned
    programme will be comprised of approximately 50,000 metres of extensional and
    infill drilling per year for the next two years, with approximately 10,000
    metres to be drilled in the fourth quarter. This drilling is aimed at unlocking
    the potential of the full strike extent of the deposit to optimise mining
    efficiency.

    Note: all intersections are downhole widths with varying true thickness due to
    the holes being part of underground fan drilling

    North Mara - Nyabirama

    The programme of infill drilling to approximately 50 metre drill spacing was
    completed during the quarter with 7 holes for 4,160 metres drilled (17,145
    metres year to date). This drilling will be incorporated into technical work
    underway by our mine planning team as we investigate the potential for an
    underground mine at Nyabirama. Better results received during the quarter
    included:

      * NBD0165     7.7m @ 3.5 g/t Au from 218m, and                                    
                                                                                        
                    1.8m @ 7.5 g/t Au from 315.2m                                       
                                                                                        
      * NBD0166     2.0m @ 87.9 g/t Au from 236m incl. 1m @ 161g/t Au from 237m, and    
                                                                                        
      * NBD0167     5.0m @ 8.5 g/t Au from 464m incl. 1m @ 36g/t Au from 467m, and      
                                                                                        
                    7.0m @ 12.8 g/t Au from 473m incl. 1m @ 81g/t Au from 475m          
                                                                                        
      * NBD0168     2.0m @ 8.4 g/t Au from 378m,                                        
                                                                                        
                    5.0m @ 4.5 g/t Au from 419m                                         
                                                                                        
      * NBD0170     2.4m @ 7.6 g/t Au from 324m, and                                    
                                                                                        
                    5.2m @ 5.9 g/t Au from 366.8m, and                                  
                                                                                        
                    13.5m @ 20.1 g/t Au from 377.5m                                     

    Greenfield Exploration

    Kenya

    Four (4) to Seven (7) diamond core rigs drilled targets along the Liranda
    Corridor area on the Isulu (formerly Acacia), Bushiangala, Shigokho and
    Shibuname Prospects during Q3 2017.  Additionally, one reverse circulation (RC)
    rig completed reconnaissance drilling across gold-in-soil anomalies on the
    Barkalare and Kitson-Kerebe target areas in the Lake Zone gold camp of the West
    Kenya Project.

    West Kenya Project

    Drilling during Q3 within the Liranda Corridor was focused on better defining
    and constraining the resource model on the Isulu Prospect (formerly Acacia), as
    well as completing step-out drilling down plunge of the existing resource. At
    Bushiangala drilling was aimed at improving the confidence and understanding
    the geometries of the mineralised lodes. At the Shigokho and Shibuname
    Prospects drilling was designed to test the extension of mineralised intercepts
    from previous drilling and targeting additional resources close to Isulu. The
    Q3 programme consisted of 20 diamond core holes (including six core wedge
    holes) for 6,225 metres at the Isulu and Bushiangala Prospects and five diamond
    core holes for 1,282 metres at the Shigokho and Shibuname Prospects. In 2017,
    78 holes for 37,999m of diamond drilling have been completed on the Isulu -
    Bushiangala prospects.

    The drilling on the Isulu and Bushiangala Prospects has better defined the
    mineralisation to support the initial inferred resource of 1.3Moz. It has
    successfully bulked out some of the Isulu lodes through additional infill
    drilling as well as increasing the confidence at Bushiangala but has
    constrained the mineralisation in areas where we had expected some lateral
    extensions. As a result we do not expect any material increase in the resource
    by the end of 2017. We continue to believe 2Moz is a realistic target for the
    project based on our current understanding of the deposit and the recent
    drilling has helped to define targets with scope for incremental
    mineralisation, including along strike, which we plan to test in 2018. Better
    results from Isulu and Bushiangala received during Q3 included:

    Isulu Prospect (formerly Acacia)

      * LCD0158W1 - 2.5m @ 114 g/t Au from 892m and 1.0m @ 11.0 g/t Au from 898m,
      * LCD0158W3 - 3.7m @ 10.7 g/t Au from 925m and 0.6m @ 21.0 g/t Au from 931m,
      * LCD0161W1 -  2.0m @ 37.0 g/t Au from 995m and 1m @ 21.5 g/t Au from 1,003m,
      * LCD0161W3 - 2.0m @ 8.49 g/t Au from 958m and 4.0m @ 2.27g/t Au from 972m,
      * LCD0162W1 - 2.0m @ 7.52 g/t Au from 846m and 2.0m @ 2.07 g/t Au from 852m,
      * LCD0168  - 2.0m @ 7.06g/t Au from 698m, and 2.8m @ 3.81 g/t Au from 760m
      * LCD0175  - 3.0m @ 55.2 g/t Au from 129m

    Bushiangala Prospect

      * LCD0173  - 3.1m @ 7.07 g/t Au from 187m,
      * LCD0174  - 3.5m @ 6.70 g/t Au from 154m,
      * LCD0176  - 1.5m @ 12.0 g/t Au from 134m and  3.1m @ 12.0 g/t Au from 175m,
      * LCD0177  - 1.5m @ 10.5 g/t Au from 114m,
      * LCD0182  - 0.6m @ 8.19 g/t Au from 116m,
      * LCD0189  - 2.0m @ 12.7 g/t Au from 164m,
      * LCD0192  - 2.0m @ 23.1 g/t Au form 166m

    The current drill programme originally planned for approximately 48,000 metres
    of diamond core drilling, is planned to be completed in October 2017 with two
    rigs now operating and completing deep down-plunge extension holes targeting
    mineralisation between 800m and 1,000 metres vertical depth with the objective
    of increasing the Isulu Prospect Inferred resource.  Planning for 2018 drilling
    is currently underway to assess a series of evolving targets within 2km of the
    Isulu resource area.

    Burkina Faso

    During Q3 2017 we continued to explore our properties in the highly prospective
    Houndé Belt in southwest Burkina Faso. Acacia currently manages four joint
    ventures and an interest in over ~2,700km2 of prospective greenstone belt. A
    major component of Q3 and year-to-date work programmes in 2017, apart from
    drilling, has been to review the structural architecture of the land holding
    and complete a target generation exercise using airborne aeromagnetic and
    radiometric data and ground IP geophysical data where available. These target
    generation layers are now being used with our surface geochemical data layers
    to develop priority drilling targets, and to date we have delineated more than
    65 targets warranting follow-up by either mapping or reconnaissance drilling. 

    South Houndé Joint Venture - current ownership 50%, next stage earn-in to 70%
    (end 2018)

    During the quarter we continued to focus on both resource extensions to the
    Tankoro Resource and regional exploration programmes searching for new
    discoveries. During Q3 2017 work continued to focus on the Tankoro Resource
    area (MM and MC Zones), the Tankoro Corridor prospects (Tankoro SW, Guy,
    Phantom and Phantom East) and regional targets (Ouangoro, Tyikoro, Poyo/
    Werienkera and Bini West).  A total of 847 metres RC, 673 metres diamond core
    (DD) and 4,122 metres of Aircore (AC) were completed, bringing the year to date
    totals to 34,165 metres AC, 3,051 metres of RC and 6,664 metres of diamond core
    drilling. In addition to this, rock chips were collected on regional targets.

    Tankoro - MM and MC Zones1

    During Q3 we completed planned drilling to test the down-plunge extensions of
    higher grade gold mineralisation related interpreted cross structures at the MM
    and MC Zones within the Tankoro resource. A "results based" phased strategy was
    adopted "cycling" the rig between the Chewbacca, Yoda, Anakine and Jabba
    targets within the MM and MC parallel mineralised structures.  All holes
    drilled to date continued to intersect the targeted porphyries and cross
    structures, with the best potential at this stage interpreted to be depth
    extensions on the MC (Jabba) Zone where drilling has identified multiple
    mineralised porphyries and gold mineralisation in the surrounding intercalated
    sediments. Better results from drilling included:

      * FRC1082 - 2.2m @ 4.74g/t Au from 324.7m, 5m @ 2.18g/t Au from 370m and
        6.15m @ 6.33g/t Au from 419m;
      * FRC1083A - 3.5m @ 3.79g/t Au from 406.5m (including 1m @ 8.75g/t Au), 1.85m
        @ 8.03g/t Au from 429.85m and 1.05m @ 5.19g/t Au from 504m;
      * FRC1076 - 6m @ 11.9g/t Au from 231m, 6.7m @ 3.80g/t Au from 240.8m
        (including 4m @ 6.12g/t Au)

    The targeted higher grade lodes on the MM Zone were either lower grade that
    expected or had a shorter strike extent than expected, and as a result the
    future focus of deeper drilling will be on the MC (Jabba) Zone and areas
    outside those tested on the MM Zone to date. A review of the entire Tankoro
    mineralised trend is currently underway in order to better define potential
    open-pit and underground resource expansion targets, and to scope out the
    required drill programmes needed to fully test the core 9-10km strike extent of
    the resource area.

    Tankoro Corridor - Phantom, Phantom East & Phantom West1

    The MM & MC Zones host the bulk of the Tankoro project's 2.1Moz mineral
    resource and features several near-surface, higher-grade shoots which extend to
    depth and have potential for exploitation by underground mining.  The Phantom,
    Phantom West and Phantom East Zones represent potential extensions that could
    add shallow ounces to the global resource.  Limited drilling was undertaken
    during the quarter with a series of RC/DD holes drilled right before the end of
    the dry season.  Additional drilling is warranted in 2018 based on results of
    these first few holes showing potential to add 2-6g/t resource ounces,
    especially since Phantom, Phantom East, Phantom West (northeast resource
    extensions) and Kenobi and Obi (southwest extensions) have been only sparsely
    drilled relative to the rest of the system. The better results from RC/DD
    received during the quarter include:

      * Phantom East - FRC1081 - 1.85m @ 6.83g/t Au from 173.65m;
      * Phantom East - FRC1053RE1 - 5.5m @ 4.88g/t Au from 120m and  9m @ 4.85g/t
        Au from 129.5m,
      * Phantom - FRC1088 - 2.45m @ 2.42g/t Au from 145.4m
      * Phantom West - FRC1091 - 4.25m @ 2.12g/t Au from 248.45m.

    One sample of primary mineralisation at Phantom has been submitted for
    preliminary metallurgical test-work.

    Tankoro Southwest Extension1

    AC drilling was completed across multiple IP-geophysical and gold-soil
    geochemical targets on the southwest extensions of the Tankoro resource trend,
    known as the Djimbake area. A total of 33 holes for 1,992 metres were drilled
    for the quarter across 12 individual target area, bringing the YTD totals to
    114 holes for 6,948 metres. The AC drilling was following up previous anomalous
    AC drill results from Q4 2016, testing the southern extension of the Kenobi
    Trend, and testing for new mineralised zones. Assay results were only partially
    received at quarter-end with better results including:

      * 4m @ 1.46g/t Au   6m @ 1.11g/t Au  10m @ 1.73g/t Au                           
                                                                                      
      * 8m @ 1.19g/t Au   12m @ 0.66g/t Au 12m @ 0.51g/t Au                           
                                                                                      
      * 10m @ 0.96g/t Au  12m @ 0.63g/t Au 12m @ 0.55g/t Au                           
                                                                                      
      * 8m @ 2.57g/t Au   8m @ 4.25g/t Au  14m @ 0.87g/t Au                           
                                                                                      
      * 6m @ 1.33g/t Au   6m @ 1.99g/t Au  4m @ 1.17g/t Au                            
                                                                                      

    Gold anomalism in the AC drilling occurs in weathered and altered sediments and
    porphyritic intrusive rocks with observed alteration being carbonate, sericite
    and kaolinite; minor quartz veining was also observed co-incident with some
    better zones of gold anomalism.  Planned follow-up drilling includes infill and
    step-out AC traverses as well as some RC and diamond core drilling to determine
    the significance of the shallow oxide gold mineralisation and orientation/
    controls in fresh rock.

    Ouangoro Trend1

    Aircore drilling commenced at the beginning of the quarter on the Ouangoro
    Trend and has identified continuous gold anomalism along several interpreted
    NNE-trending linear geophysical features. A total of 15 holes for 970 metres
    were drilled for the quarter, bringing the YTD totals to 382 holes for 24,097
    metres on predominantly 200m and 400m spaced drill fences. Positive results
    have been returned from the majority of AC traverses including better results
    of:

      * 20m @ 0.67g/t Au from 28m (including 2m @   12m @ 1.73g/t Au                    
        3.09g/t Au)                                                                     
                                                                                        
      * 8m @ 0.86g/t from surface (including 2m @   10m @ 1.95 g/t Au                   
        2.32g/t Au)                                                                     
                                                                                        
      * 18m @ 0.61g/t Au from 6m (including 4m @    8m @ 1.10 g/t Au                    
        1.69g/t Au)                                                                     
                                                                                        
      * 2m @ 1.80g/t Au                             6m @ 1.40 g/t Au                    
                                                                                        
      * 6m @ 1.04g/t Au                             4m @ 1.16 g/t Au                    
                                                                                        
      * 4m @ 1.34g/t Au                             4m @ 1.58 g/t Au                    
                                                                                        

    Gold mineralisation and anomalism in drill chips, and observed in artisanal
    workings, is typically associated with quartz veins in sheared siltstone and
    sandstone units intruded by interpreted quartz-feldspar porphyries, with
    fresher drill chips show carbonate and silica-sericite alteration.Regionally
    the anomalous gold zones intersected in Aircore drilling occur on interpreted
    020-trending shear zones, often interpreted to be cross-cut by 070-trending
    structures (a possible control to higher grade shoots).The next phase of work
    being contemplated for the Ouangoro Trend is to complete trenching and
    IP-geophysical surveys to help better define the target structures and to look
    for local controls to higher grade mineralisation. Follow-up AC, RC and DD
    drilling will also be part of a phased follow-up programme in 2018.

    1 Drilling results are quoted as downhole intersections. True widths of
    mineralisation intersected by RC and DDH drilling are estimated to be
    approximately 70% to 80% of reported downhole intersection lengths, except as
    otherwise noted. The orientation of some of the mineralised units by AC
    drilling is not yet well understood.

    Pinarello & Konkolikan Joint Venture (Canyon Resources Limited) - current
    ownership 75%, potential to earn 100%

    Acacia has now earned 75% equity in the project and we have therefore entered
    the contributory/dilution phase of the JV agreement. Canyon Resources, our
    joint venture partner has elected to dilute, and the current programmes will
    increase Acacia's equity to approximately 89%.

    A total of 1,073 soil samples, 23,089 metres of Aircore drilling and 6,401
    metres of RC drilling have been completed during 2017.  Results from RC
    drilling completed in Q2 and received in Q3 2017 were mixed with broad zones of
    gold anomalism and narrow higher grade zones intersected at the Gaghny Prospect
    whilst hole PIRC0039 on the northern Pinarello licence following up the
    projected extension of the Tankoro Trend intersected 6m @ 11.1g/t Au from 28m,
    including 2m @ 32.4g/t Au from 28m.  A programme of RC and diamond core
    drilling is being designed to follow-up this intersection during Q4 2017 and
    into Q1 2018.

    Frontier JV - earning 100% through option payments

    Regional regolith and geological mapping has been completed for both licences.
    A regional 800m x 400m reconnaissance BLEG soil sampling programme, combined
    with termite mound, rock chip and quartz lag sampling programmes has also been
    completed. This work identified a number of significant large scale
    gold-in-soil anomalies (soils up to 3g/t Au). A 200m x 200m infill programme of
    soil sampling commenced in Q3 with a further 45 samples collected, bringing the
    year to date total to 7,780 soil samples.  The programme of soil sampling was
    suspended in early July due to the commencement of the wet season.

    Results from the soil sampling programmes received during the quarter continue
    to be encouraging with gold assays up to 3,841ppb Au (8.84g/t Au) reported. 
    Portable XRF work on the soil samples shows anomalous pathfinder elements
    including, Mo, W, As and K co-incident with several of the large-scale gold
    anomalies identified to date.  Work in Q4 2017 will involve continuing infill
    soil sampling, mapping, and XRF multi-element analysis in preparation for
    trenching and drilling in Q1 2018.

    Mali

    Tintinba - Bane Project - earning 95% through option payments

    The Tintinba-Bane Project consists of three permits covering approximately
    150km2. These properties are located within the Kénéiba Inlier of Western Mali,
    along the world class Senegal-Mali-Shear-Zone (SMSZ), which hosts more than 50
    million ounces of gold endowment. During the quarter, a ground-based gradient
    array induced polarisation geophysical survey was completed (31 line km) and
    interpreted. Results from IP, soils, drilling and mapped and interpreted
    geology have been used to refine existing and define new targets for drill
    testing. At least 25 targets with co-incident IP chargeability, resistivity,
    and surface gold-in-soil anomalism have been identified.

    RC drilling year to date has returned positive results from 8 of 13 gold
    anomalies tested including better results of; 4m @ 18.7g/t and 4m @ 5.62g/t,
    13m @ 1.11g/t, 15m @ 0.50g/t, 13m @ 0.50g/t, 25m @ 0.50g/t including 7m @ 1.01g
    /t, 17m @ 0.71g/t and 19m @ 0.55g/t.   Given the discovery history of several >
    3Moz deposits in the SMSZ, these results and the associated alteration on
    essentially single RC fences, across large-scale gold-in-soil anomalies can be
    considered very significant and warrant follow-up drilling.    Work in Q4 2017
    will involve trenching and follow-up reconnaissance drilling as required to
    better define the highest priority targets for a more extensive campaign of
    drilling.

    Non-IFRS Measures

    Acacia has identified certain measures in this report that are not measures
    defined under IFRS. Non-IFRS financial measures disclosed by management are
    provided as additional information to investors in order to provide them with
    an alternative method for assessing Acacia's financial condition and operating
    results, and reflects more relevant measures for the industry in which Acacia
    operates. These measures are not in accordance with, or a substitute for, IFRS,
    and may be different from or inconsistent with non-IFRS financial measures used
    by other companies. These measures are explained further below.

    Net average realised gold price per ounce sold is a non-IFRS financial measure
    which excludes from gold revenue:

    - Unrealised gains and losses on non-hedge derivative contracts; and

    - Export duties

    It also includes realised gains and losses on gold hedge contracts reported as
    part of cost of sales.

    Net average realised gold price per ounce sold have been calculated as follow:

    (US$000)                          Three months ended 30        Nine months ended 30    
                                            September                    September         
                                                                                           
    (Unaudited)                                2017      2016            2017          2016
                                                                                           
    Gold revenue                            169,828   275,897         555,687       760,511
                                                                                           
    Less: Realised gold hedge                     -   (1,331)               -       (1,331)
    losses                                                                                 
                                                                                           
    Net gold revenue                        169,828   274,566         555,687       759,180
                                                                                           
    Gold sold (ounces)                      132,787   206,488         445,225       607,451
                                                                                           
    Net average realised gold price           1,279     1,330           1,248         1,250
    (US$/ounce)                                                                            

    Cash cost per ounce sold is a non-IFRS financial measure. Cash costs include
    all costs absorbed into inventory, as well as royalties, and production taxes,
    and exclude capitalised production stripping costs, inventory purchase
    accounting adjustments, unrealised gains/losses from non-hedge currency and
    commodity contracts, depreciation and amortisation, reduced operation costs and
    corporate social responsibility charges. Cash cost is calculated net of
    co-product revenue. Cash cost per ounce sold is calculated by dividing the
    aggregate of these costs by total ounces sold.

    The presentation of these statistics in this manner allows Acacia to monitor
    and manage those factors that impact production costs on a monthly basis. Cash
    costs and cash cost per ounce sold are calculated on a consistent basis for the
    periods presented.

    The table below provides a reconciliation between cost of sales and total cash
    cost to calculate the cash cost per ounce sold.

                                       Three months ended 30         Nine months ended 30   
    (US$'000)                                September                     September        
                                                                                            
    (Unaudited)                                2017       2016             2017         2016
                                                                                            
    Cost of Sales                                                                           
                                                                                            
    Direct mining costs                      68,508    111,649          228,818      346,085
                                                                                            
    Third party smelting and                  1,498      5,589            8,236       19,228
    refining fees                                                                           
                                                                                            
    Realised losses on economic                 337      2,161              615        8,615
    hedges                                                                                  
                                                                                            
    Realised losses on gold hedges                -      1,331                -        1,331
                                                                                            
    Royalty expense                          12,213     12,895           30,895       35,429
                                                                                            
    Depreciation and amortisation*           22,982     41,702           80,941      120,078
                                                                                            
    Total                                   105,538    175,327          349,505      530,766
                                                                                            
    Total cost of sales                     105,538    175,327          349,505      530,766
                                                                                            
    Deduct: Depreciation and               (22,982)   (41,702)         (80,941)    (120,078)
    amortisation*                                                                           
                                                                                            
    Deduct: Realised losses on gold               -    (1,331)                -      (1,331)
    hedges                                                                                  
                                                                                            
    Deduct: Co-product revenue                (774)    (8,798)          (6,579)     (29,131)
                                                                                            
    Total cash cost                          81,782    123,496          261,985      380,226
                                                                                            
    Total ounces sold                       132,787    206,488          445,225      607,451
                                                                                            
    Total cash cost per ounce sold              616        598              588          626

    *Depreciation and amortisation includes the depreciation component of the cost
    of inventory sold

    All-in sustaining cost (AISC) is a non-IFRS financial measure. The measure is
    in accordance with the World Gold Council's guidance issued in June 2013. It is
    calculated by taking cash cost per ounce sold and adding corporate
    administration costs, share-based payments, reclamation and remediation costs
    for operating mines, corporate social responsibility expenses, mine exploration
    and study costs, realised gains and/or losses on operating hedges, capitalised
    stripping and underground development costs and sustaining capital expenditure.
    This is then divided by the total ounces sold. A reconciliation between cash
    cost per ounce sold and AISC for the key business segments is presented below:

    (Unaudited)        Three months ended 30 September 2017     Three months ended 30 September  
                                                                              2016               
                                                                                                 
    (US$/oz sold)      Bulyanhulu    North   Buzwagi Group*    Bulyanhulu  North   Buzwagi Group*
                                     Mara                                   Mara                 
                                                                                                 
    Cash cost per              863       550     564     616          808      364     986    598
    ounce sold                                                                                   
                                                                                                 
    Corporate                   60        28      50      51           30       20      29     29
    administration                                                                               
                                                                                                 
    Share based                (8)       (2)     (3)     (5)            8        7      11     97
    payments                                                                                     
                                                                                                 
    Rehabilitation              21        11       6      12            8        8       2      7
                                                                                                 
    CSR expenses                10        17       8      16            8       17      20     14
                                                                                                 
    Capitalised                310       194       -     170          347      199       -    200
    development                                                                                  
                                                                                                 
    Sustaining capital         109        66      70      79           91       40      28     53
                                                                                                 
    Total AISC               1,365       864     695     939        1,300      655   1,076    998

    * The group total includes a cost of US$16/oz of unallocated corporate related
    costs in Q3 2017, and a cost of US$95/oz in Q3 2016.

    (Unaudited)         Nine months ended 30 September 2017    Nine months ended 30 September 2016
                                                                                                  
    (US$/oz sold)       Bulyanhulu    North  Buzwagi  Group*   Bulyanhulu    North Buzwagi  Group*
                                       Mara                                   Mara                
                                                                                                  
    Cash cost per              812      473      647     588          700      402   1,030     626
    ounce sold                                                                                    
                                                                                                  
    Corporate                   42       25       49      43           23       22      26      26
    administration                                                                                
                                                                                                  
    Share based                (5)      (2)      (5)    (19)           10        7      11      65
    payments                                                                                      
                                                                                                  
    Rehabilitation              17       11        6      11            7        9       3       7
                                                                                                  
    CSR expenses                 9       10        8      13            6       14      11      13
                                                                                                  
    Capitalised                365      189        -     195          230      189       -     166
    development                                                                                   
                                                                                                  
    Sustaining capital         106       68       37      76           81       51      27      58
                                                                                                  
    Total AISC               1,346      774      742     907        1,057      694   1,108     961

    * The group total includes a cost of US$1/oz of unallocated corporate related
    costs in Q3 YTD 2017, and a cost of US$63/oz in Q3 YTD 2016.

    AISC is intended to provide additional information on the total sustaining cost
    for each ounce sold, taking into account expenditure incurred in addition to
    direct mining costs and selling costs.

    Where reference is made to AISC per ounce produced, this is calculated in a
    similar manner as set out above, but adjusted for the impact of the change in
    inventory charge/credit relating to finished gold inventory. This recalculated
    number is then divided by ounces produced.

    Cash cost per tonne milled is a non-IFRS financial measure. Cash costs include
    all costs absorbed into inventory, as well as royalties, co-product credits,
    and production taxes, and exclude capitalised production stripping costs,
    inventory purchase accounting adjustments, unrealised gains/losses from
    non-hedge currency and commodity contracts, depreciation and amortisation and
    corporate social responsibility charges. Cash cost is calculated net of
    co-product revenue. Cash cost per tonne milled is calculated by dividing the
    aggregate of these costs by total tonnes milled.

    EBITDA is a non-IFRS financial measure. Acacia calculates EBITDA as net profit
    or loss for the period excluding:

      * Income tax expense;
      * Finance expense;
      * Finance income;
      * Depreciation and amortisation; and
      * Impairment charges of goodwill and other long-lived assets.

    EBITDA is intended to provide additional information to investors and analysts.
    It does not have any standardised meaning prescribed by IFRS and should not be
    considered in isolation or as a substitute for measures of performance prepared
    in accordance with IFRS. EBITDA excludes the impact of cash costs of financing
    activities and taxes, and the effects of changes in operating working capital
    balances, and therefore is not necessarily indicative of operating profit or
    cash flow from operations as determined under IFRS. Other companies may
    calculate EBITDA differently.

    A reconciliation between net profit for the period and EBITDA is presented
    below:

    (US$000)                             Three months ended 30       Nine months ended 30  
                                               September                   September       
                                                                                           
    (Unaudited)                                  2017        2016          2017        2016
                                                                                           
    Net profit for the period                  16,038      52,787        78,581      46,659
                                                                                           
    Plus income tax expense                     8,561      27,970        45,563     135,714
                                                                                           
    Plus depreciation and amortisation         22,982      41,702        80,941     120,078
    *                                                                                      
                                                                                           
    Plus finance expense                        2,982       3,023         8,436       8,403
                                                                                           
    Less finance income                         (261)       (657)       (1,804)     (1,147)
                                                                                           
    EBITDA                                     50,302     124,825       211,717     309,707

    *Depreciation and amortisation includes the depreciation component of the cost
    of inventory sold.

    Adjusted EBITDA is a non-IFRS financial measure. It is calculated by excluding
    one-off costs or credits relating to non-routine transactions from EBITDA. It
    excludes other credits and charges that, individually or in aggregate, if of a
    similar type, are of a nature or size that requires explanation in order to
    provide additional insight into the underlying business performance. EBITDA is
    adjusted for items (a) to (f) as contained in the reconciliation to adjusted
    net earnings below.

    EBIT is a non-IFRS financial measure and reflects EBITDA adjusted for
    depreciation and amortisation and goodwill impairment charges.

    Adjusted net earnings is a non-IFRS financial measure. It is calculated by
    excluding certain costs or credits relating to non-routine transactions from
    net profit attributed to owners of the parent. It includes other credit and
    charges that, individually or in aggregate, if of a similar type, are of a
    nature or size that requires explanation in order to provide additional insight
    into the underlying business performance. Adjusted net earnings and adjusted
    earnings per share have been calculated as follows:

    (US$000)                             Three months ended 30       Nine months ended 30  
                                               September                   September       
                                                                                           
    (Unaudited)                                  2017        2016          2017        2016
                                                                                           
    Net earnings                               16,038      52,787        78,581      46,659
                                                                                           
    Adjusted for:                                                                          
                                                                                           
    Restructuring costs(a) 2                   15,399         800        18,703       2,925
                                                                                           
    One off legal settlements (b)               3,583           -         5,083           -
                                                                                           
    Insurance settlements(c)                        -     (3,500)             -     (3,500)
                                                                                           
    Reduced operational costs(d)3               7,411           -         7,411           -
                                                                                           
    Discounting of indirect taxes(e)                -           -             -     (6,508)
                                                                                           
    Prior year tax positions                        -           -             -      69,916
    recognised(f) 1                                                                        
                                                                                           
    Tax impact of the above                   (7,918)         811       (9,359)         173
                                                                                           
    Adjusted net earnings                      34,513      50,898       100,419     109,665

    1 For the year ended 31 December 2016, US$69.9 million represents a provision
    raised for the implied impact of an adverse tax ruling made by the Tanzanian
    Court of Appeal with respect to historical tax assessments of Bulyanhulu. As
    reported in Q1 2016, the impact of the ruling was calculated for Bulyanhulu and
    extrapolated to North Mara and Tulawaka as well and covers results up to the
    end of 2015. On a site basis, US$35.1 million was raised for Bulyanhulu,
    US$30.4 million for North Mara and US$4.4 million for Tulawaka.

    2 Restructuring costs for Q3 2017 mainly consist of severance costs incurred as
    part of the Bulyanhulu reduced operations programme.

    3 Reduced operational costs for Q3 2017 relate primarily to one-off contractor
    exit costs and inventory writedowns incurred as part of the Bulyanhulu reduced
    operations programme.

    Adjusted net earnings per share is a non-IFRS financial measure and is
    calculated by dividing adjusted net earnings by the weighted average number of
    Ordinary Shares in issue.

    Free cash flow is a non-IFRS measure and represents the change in cash and cash
    equivalents in a given period.

    Net cash is a non-IFRS measure and is calculated by deducting total borrowings
    from cash and cash equivalents.

    Mining statistical information - the following describes certain line items
    used in Acacia's discussion of key performance indicators:

      * Open pit material mined - measures in tonnes the total amount of open pit
        ore and waste mined.
      * Underground ore tonnes hoisted - measures in tonnes the total amount of
        underground ore mined and hoisted.
      * Underground ore tonnes trammed - measures in tonnes the total amount of
        underground ore mined and trammed.
      * Total tonnes mined includes open pit material plus underground ore tonnes
        hoisted.
      * Strip ratio - measures the ratio of waste?to?ore for open pit material
        mined.
      * Ore milled - measures in tonnes the amount of ore material processed
        through the mill.
      * Head grade - measures the metal content of mined ore going into a mill for
        processing.
      * Milled recovery - measures the proportion of valuable metal physically
        recovered in the processing of ore. It is generally stated as a percentage
        of the metal recovered compared to the total metal originally present.