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CORPORATEPRESENTATIONMAY2017

TSX-V:ATY|OTC:ATCMF|ATICOMINING.COM 1

TSX-V:ATY|OTC:ATCMF|ATICOMINING.COM

CAUT IONARY NOTES AND QP

Certain statements in this presenta-on cons-tute forward-looking statements and as such are based on anassumed setofeconomic condi-onsandcoursesof ac-on.These includees-matesof futureproduc-on levels,expecta-ons regardingmine produc-on costs, expected trends in mineral prices and statements that describeA-coMiningCorpora-on’sfutureplans,objec-vesorgoals.Thereisasignificantriskthatactualresultswillvary,perhapsmaterially, fromresultsprojecteddependingonsuchfactorsaschanges ingeneraleconomiccondi-onsand financial markets, changes in prices for silver and other metals, technological and opera-onal hazards inA-co’sminingandminedevelopmentac-vi-es,risksinherentinmineralexplora-on,uncertain-esinherentinthees-ma-onofmineral reserves,mineral resources,andmetal recoveries, the-mingandavailabilityoffinancing,governmentalandotherapprovals,poli-calunrestorinstabilityincountrieswhereA-coisac-ve,labourrela-onsandotherriskfactors.TheCompanyhasnotbaseditsproduc-ondecisionsandongoingmineproduc-ononmineralreservees-mates,preliminaryeconomicassessmentsorfeasibilitystudies,andhistoricallysuchprojectshaveincreaseduncertaintyandriskoffailure.Mineralresourcesthatarenotmineralreservesdonothavedemonstratedeconomicviability.Dr.DemetriusPohl,PhD,istheQualifiedPersonforA-co,asdefinedbyNa-onalInstrument43-101.Dr.Pohlwasalso responsible forensuring that the informa-oncontained in thispresenta-on isanaccurate summaryof theoriginalreportsprovidedtoA-coandhasapprovedthescien-ficandtechnicalcontentofthispresenta-on.

NON-GAAPFINANCIALMEASURESCashcostperpoundofpayablecopperproducedandcashcostpertonneofprocessedorearekeyperformancemeasuresthatmanagementusestomonitorperformance.Inaddi-on,cashcostsareanindustrystandardmethodofcomparingcertaincostsonaperunitbasis;however,thesedonothaveastandardizedmeaningandmaydifferfrommethodsusedbyothercompanieswithsimilardescrip-ons.Managementbelievesthatcertaininvestorsusethesenon-GAAPfinancialmeasurestoevaluatetheCompany’sperformance.Theseperformancemeasureshavenomeaningunder IFRSand,therefore,amountspresentedmaynotbecomparabletosimilardatapresentedbyotherminingcompanies.

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AT ICO MIN ING CORPORAT ION Companysnapshot

MANAGEMENT&DIRECTORS

STRATEGY

ELROBLEMINE,COLOMBIA

SHARESTRUCTURE

CASHBALANCE*

*AsofDecember31st,2016

§  ~18%foundinggroup§  ~49%ins-tu-onalshareholders§  ~33%retailshareholders

§  Successfultrackrecordcrea-ngshareholdervalue

§  Industryexper-seandextensiveregionalnetworkinLa-nAmerica

§  Buildaleadingmid--erCu-Auproducerthroughorganicgrowthandacquisi-ons,focusedonhighmarginopera-onsinLa-nAmerica

§  90%Ownershipofproducingmineandsurroundingclaims§  ElRoblehasminedhighgradeCu-Aumaterialforover30years§  M&Iresourceof1.87Mtat3.46%Copper,2.27g/tGold§  6,679hectarecon-guousunderexploredlandpackagewith10kilometerfavorablegeologicalcontactzoneprospec-veforVMSmineraliza-on

§  US$3.6million

3


2016 2017

CAP ITAL STRUCTURE Tightsharestructure

TSX.V ATYOTC ATCMFSharesoutstanding 98.2millionOp-onsoutstanding 7.8millionFullydiluted 105.9million

TopinsXtuXonalshareholdersü  Ingalls&Snyderü  Frontdealü  ResourceCapitalFundsü  Gold2000

InsXtuXonalcoverageü  PIFinancialü  M-Partners

InsXtuXonalwatchlistü  Canaccordü  EightCapitalPartners

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ATY.Vsharepriceperformance


FernandoE.Ganoza,B.Sc.Engineering,MBAChiefExecuXveOfficerandDirectorFernandoisaMiningEngineerwithover15yearsofmanagementexperienceinLa-nAmericaincludingkeyrolesinthedevelopmentofminesinPeruandMexicoasProjectManagerandCountryManagerforCanadianbasedproducerFortunaSilverMines.

JorgeR.Ganoza,B.Sc.EngineeringPresidentandDirectorJorgehasover40yearsexperienceinLa-nAmericanminingindustryholdingseniorleadingrolesinthefoundinganddevelopmentofprivateandpublicminingcompanies.

JosephA.Salas,B.Sc.GeologicalEngineeringSr.ExploraXonManagerJosephhasover20yearsexperienceinexplora-on,minegeology,projectevalua-onanddevelopmentwithvastexper-seingold-copperandcopper-molybdenumporphyriesinColombiaandPeru.

BillTsang,CPA,CAChiefFinancialOfficerBillisaCharteredProfessionalAccountantwithmorethan10yearsoffinancialaccoun-ngandaudi-ngexperienceinthemineralexplora-onandminingindustry.

MANAGEMENT SuccessfultrackrecordinLaXnAmerica

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D IRECTORS SuccessfultrackrecordinLaXnAmerica

LuisD.Ganoza,B.Sc.Engineering,MBA,M.ScChairmanoftheBoardLuis holds theposi-onof Chief FinancialOfficer inFortuna Silver Mines Inc. and has over 12 yearsexperience in the financial management of publicminingcompanies.

FernandoE.Ganoza,B.Sc.Engineering,MBAChiefExecuXveOfficerandDirectorFernandoisaMiningEngineerwithover15yearsofmanagementexperienceinLa-nAmerica includingkeyroles inthedevelopmentofmines inPeruandMexico as Project Manager and CountryManagerforCanadianbasedproducerFortunaSilverMines.JorgeR.Ganoza,B.Sc.EngineeringPresidentandDirectorJorge has over 40 years experience in La-nAmerican mining industry holding senior leadingroles in the founding and development of privateandpublicminingcompanies.Previously to joiningA-co, Mr. Ganoza held the posi-on of VP ofOpera-onsinFortunaSilverMinesInc.

MarioSzotlenderDirectorMario, co-founder of Fortuna Silver Mines, isalso a Director of Radius Gold Inc. andEndeavourSilverCorp.

MichaelWinnDirectorMichael has over 20 years experience in theresourcesector,andisthePresidentofSeabordCapitalCorp.whichprovidesinvestmentanalysisandfinancialservicestocompaniesopera-ngintheenergyandminingsectors.LuisF.SáenzDirectorMr. Sáenz is a finance execu-ve with over 20years experience in mining finance and metalstradingwithafocusonLa-nAmerica.

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GROWTHSTRATEGY Focusedonmedium-sizedhighgradeCu-AuassetsinLaXnAmerica

§  Evaluatemedium-sizedadvancedexplora3onopportuni3esinColombia(VMSandcentralCu-Autrend),Peru(southerncopperbelt)andChile(northerncopperbelt)

§  Acquiremid-sizeprivateorpublicsmallscaleproducingmineswithexplora-onpoten-al

§  Focusonsustainableorganicgrowthatcurrentopera-on

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E L ROBLE MINE , COLOMBIA

§  ElRoblemineistheonlyCu-AuVMSdepositinproduc-oninColombia

§  3.5hoursawayfromthecityofMedellinviapaved145kilometerhighway

§  Powergrid,abundantwaterandminefacili-esonsite

ExcellentlocaXonandmineinfrastructure

ElRobleMine

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E L ROBLE MINE , COLOMBIA InproducXonforover30years

LocaXon CarmendeAtrato,Colombia

Ownership 90%

Typeofdeposit Mafic-typeVolcanicMassiveSulphide

CommodiXes Cu,Au,Ag

Processing Standardgrinding,millingandflota-oncircuit

OperaXon 800tpdundergroundmine

EndProduct Cu(+Au,Ag)Concentrate

M&IResource 1.87Mtat3.46%Copper,2.27g/tGold

800tpdprocessingfacility

*

*

* Duringtheop:ontermanduptoNovember22nd2013,theCompanywasnotresponsibleforminingorforresourcedevelopmentandgainednoincomefromtheminingopera:ons

**TheCompanyisbasing2017guidanceonyearendedDecember31,2015financialandproduc:onresults.

PleaserefertoCau:onaryNoteonForwardLookingStatementsatthebeginningofthisdocument.

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**

**

1,412

9,07912,044

18,724

543%

33%

55%

02,0004,0006,0008,00010,00012,00014,00016,00018,00020,000

2013 2014 2015 2016 2017

(000s)lbs

CopperProducXon

2,297

9,53810,994 11,159315%

15%

2%

0

2,000

4,000

6,000

8,000

10,000

12,000

2013 2014 2015 2016 2017

oz

GoldProducXon


E L ROBLE MINE , COLOMBIA ProducXonSummary 2013* 2014 2015 Q22016 Q32016 Q42016 2016 Q12017

ProducXonCopper(000slbs) 1,412 9,079 12,044 4,786 4,515 5,146 18,724 5,046

Gold(ounces) 2,297 9,538 10,994 2,948 2,813 2,832 11,519 2,550

MineTonnesmined 69,901 139,154 179,995 63,112 63,112 64,314 244,717 63,468

MillTonnesprocessed 69,895 133,332 178,095 64,246 61,886 62,870 242,717 62,885

Tonnesprocessedperday 303 462 638 814 766 790 788 810

Coppergrade(%) 1.07 3.37 3.26 3.63 3.48 3.92 3.71 3.89

Goldgrade(g/t) 1.56 3.3 2.78 2.20 2.08 2.19 2.17 1.92

RecoveriesCopper(%) 89.6 91.4 94.1 93.0 94.6 94.7 94.2 93.5

Gold(%) 65.2 66.9 69.2 65.0 67.9 63.8 66.1 65.8

ConcentrateCopperandGoldconcentrates(dmt) 3,294 19,418 29,024 10,718 10,221 10,881 41,494 10,566

Payablecopperproduced(000slbs) 1,341 8,625 11,428 4,547 4,312 4,887 17,776 4,790

CashCostperpoundofpayablecopperproduced(1) N/A 0.82 1.00 0.96 1.35 1.19 1.10 TBA

*Duringtheop:ontermanduptoNovember22nd2013,theCompanywasnotresponsibleforminingorforresourcedevelopmentandgainednoincomefromtheminingopera:onsNote:Metalproduc:onfiguresaresubjecttoadjustmentsbasedonfinalsePlement(1)  Netofby-productcredits(refertonon-GAAPFinancialMeasures)

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E L ROBLE MINE , COLOMBIA Majorscale-upcomponentscompletedtoachieve800tpd

NewtailingsfacilityEntrancetonewlevel1880adit

§  Firstandsecondphaseofthenewtailingsfacilitycompleted

§  Facilitybuilttointerna-onalstandards

§  Thirdphaseconstruc-onwillcommenceasrequiredbyopera-onalneeds

§  Fivebyfive,830meteradit

§  Directaccesstothenewlydiscoveredresources

§  Improvedundergrounddrillaccess

§  Capacitybeyond800tpd

800tpdprocessingfacility

§  Upgradestothecrushingandmillingcircuitincludinganewconecrusherandstrongerballmillmotors

§  Addi-onalflota-oncells

§  Upgradestothethickenerandvacuumdrumfilter

§  Newonsitelab

ADIT TAILINGSFACILITY PROCESSINGFACILITY

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EXPLORAT ION PROGRAMMineoverviewfromArchietarget

AdministraXveoffices

Mill

Coreshack

TailingsdaminremediaXon

ElRobleMine,Colombia

New1880adit

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E L ROB L E M INE V I C IN I T Y E XP LORAT ION PROGRAM Resourceupdatecompleted

Undergrounddrilling

§  HighCu-Augradesdefinedbelowthe2000metereleva-on,previousoperator’slowestproduc-onlevelatthecurrentlyproducingmine

§  Measuredandindicatedresourceof1.87Mtat3.46%Copper,2.27g/tGoldand8.87g/tSilverusingacut-offgradeof0.93%CuEq

§  Poten-altofurtherincreaseresourceattheElRoblemineasmineraliza-onisopenalongstrikeandatdepth

Coreshack

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E L ROB L E M I N E V I C I N I T Y E X P LORA T I ON P ROGRAM

Highgrademassivesulfidediscovered

ElRobleLongSecXon

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E L ROB L E M I N E V I C I N I T Y E X P LORA T I ON P ROGRAM

HighgrademineralizaXonconXnuesatdepth Intercept(m)

Body HoleID From To Interval(m) Cu(%) Au(g/t) Ag(g/t)Goliath ATDHR-01 109.2 151.0 41.7 6.54 1.82 7.43

Including 109.2 111.0 1.7 9.00 4.81 22.2 121.0 123.0 2.0 6.87 10.27 11.4 125.0 141.0 16.0 7.13 1.00 3.87 143.0 145.0 2.0 14.85 0.91 15.15

ATDHR-12 113.9 132.1 18.15 10.30 2.10 6.59Including

113.9 118.0 4.10 11.06 6.46 17.57120.0 122.0 2.00 15.91 0.78 3.23122.0 126.0 4.00 17.45 1.06 3.94

ATDHR-20 128.0 148.4 20.40 5.25 1.28 6.16

Maximus ATDHR-04 61.0 102.0 41.0 6.49 17.57 13.26Including 75.0 85.0 10.0 3.00 3.59 12.77

85.0 95.0 10.0 18.40 8.63 19.29 95.0 97.0 2.0 3.92 250.0 21.2 97.0 102.0 5.0 6.05 7.21 13.20

ATDHR-05 70.0 79.0 9.0 2.50 2.31 16.17Including 75.5 77.0 1.5 3.81 9.41 145.5

77.0 78.0 1.0 10.82 1.60 0.00ATDHR-17 71.8 160.5 88.70 5.41 2.48 10.83Including

71.8 75.2 3.40 11.50 7.22 13.77100.3 104.1 3.80 7.17 3.89 18.20141.1 149.5 8.45 12.96 1.09 12.70

Zeus ATDHR-26 144.0 263.7 119.7 6.89 6.26 16.50Including 145.8 156.3 10.43 11.68 14.14 33.83ATD-0003 158.8 245.20 86.4 5.04 3.71 8.69ATD-0004 155.7 225.75 70.1 6.26 1.85 7.93Including 186.4 225.75 39.53 7.50 1.31 5.67ATDHR-28 242.8 292.0 49.20 4.11 2.32 6.36Including 257.4 266.5 9.12 6.69 1.71 7.07

2012-15ExploraXonHighlights

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E L ROB L E M INE D I S TR I C T E XP LORAT ION UPS ID E

§  6,679con-guoushectarepropertywithlimitedandintermipentexplora-onoverthepast40years

§  10,000metersofdrillingbyKennecopandNipetsuattheminevicinitytodefinethehistoricalresources(1982-1986)

§  Con-nuousexplora-onprogramsbyA-cooverthepast5years,havedefined16regionaldrilltargets.

PastexploraXonprogramsfocusedonminevicinity

ElRoblemineandsurroundingclaims

ElRobleMineVMSwithaMeasuredand

Indicatedresourceof1.87Mt3.46%Cu,2.27g/tAuand8.00

g/tAg

ZeusmassivesulfideCoreshownfromhole26:119mof6.9%Cu,6.3g/tAu

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E L ROB L E M INE D I S TR I C T E XP LORAT ION UPS ID E

§  A-coiden-fiedandmappeda10kmstra-graphiccontactbetweenbasaltflowsandpelagicsedimentsthatcontrolmineraliza-on

§  Geochemicalprogram(1)andgeophysicalsurveys(2)haveoutlinedmul-pleVMStargetsoverthe10kmfavorablecontact

§  Only3of15districtgeochemicaltargetshavehadpreliminarydrilltes-ng;Archie,SanLorenzoandSantaAnita

§  A-coplanstocon-nuedrillingattheSantaAnitatargetandtodrilltestatleast2newtargetsin2017

§  Poten-alformoretargetstobediscoveredduringdistrictexplora-onoftheheavilyvegetatedterrain

PotenXaltodiscoveraddiXonalVMSbodies

(1)Geochemicalprogramcorrespondstorockchipandsoilsampling(2)GeophysicalsurveysconductedincludeIP,VTEM,magne-csurvey,

gravityanddown-holeEMGeologicalmapoffavorablecontactwithinElRobleclaims

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INVESTMENT H IGHL IGHTS Buildingaleadingmid-XerCu-Auproducer

ü Proventeamofminedevelopersandmineoperators

ü Industryexper-seandregionalnetworkü Focusedondevelopingandopera-nghighmarginmid-

sizedCu-Audeposits

ü Inproduc-onandgenera-ngcashflowatElRoblemine

ü UpsideatElRoblemine’sunderexploredlargelandpackagewithmul-plegeochemicalandgeophysicalVMSanomalies

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CORPORATEOFFICESuite501–543GranvilleSt.VancouverBCV6C1X8T:+1.604.633.9022

CONTAC T I N FORMAT I ON

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[email protected]



APPENDIX

ElRoblemineanalystvisit

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E L ROB L E M INE V I C IN I T Y E XP LORAT ION PROGRAM ResourceEsXmateTable

Note:1.  Themineralresourcees-mateupdatewaspreparedinaccordancewiththedefini-onsintheCanadianNa-onalInstrument43-101andbasedondatafrom

230drillholestotaling27,945meterscompletedbyA-co,during2010anduptoJune2015.2.  MineralResourcesareasdefinedbyCIMDefini:onStandardsonMineralResourcesandMineralReserves;3.  TheElRobleminecurrentlycontainsnoMineralReserves;4.  MineralResourcesthatarenotMineralReservesdonothavedemonstratedeconomicviability;5.  Therearenoknownlegal,poli-cal,environmentalorotherrisksthatcouldmateriallyaffectthepoten-aldevelopmentoftheMineralResourcesatElRoble;6.  ElRobleMineralResourcesarees-matedandreportedasofJune30,2015;7.  ElRobleMineralResourcesarees-matedandreportedataCuEquivalentof0.93%Cu,withCuEquivalentin%usingaCupriceofUSD$6,172/tonneCu

metalandUSD$1,200/tr.Oz.Auandcopperandgoldrecoveriesof93.5%and73%,respec-vely;8.  Totalsmaynotaddduetoroundingprocedures.

ContainedMetal

CuEqCutoff(%)

Tonnes(000)

CuEq(%)

Cu(%)

Au(g/t)

Ag(g/t)

CuLbs(000)

Auoz(000)

Agoz(000)

MeasuredResources

0.93% 791 4.94 3.68 2.61 10.06 64,189 66 256

IndicatedResources

0.93% 1,074 4.27 3.29 2.02 8.00 78,023 70 276

[email protected]%CuEq.

0.93% 1,865 4.55 3.46 2.27 8.87 142,212 136 532

InferredResources

0.93% 255 4.75 4.1 1.34 5.21 23,042 11 43

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VMS DEPOS ITS Typicallyoccurinclusters

VMSDeposit

§  Volcanogenicmassivesulfidemineraldepositsareformedatornearthesea-floorbyvolcanicac-vity

§  VMSdepositsgenerallyoccurinclusters;raretofindjustasingledeposit

§  Over1,000knowndepositsfrom<1Mttoover300Mt,averagesize2.87Mttonnesof1.82%Cuand1.4g/tAu

§  Itispossibletoes-matethesizeandgradeoffuturediscoveriesinadistrictbasedontheknowndistribu-onofVMSdeposits

§  ColombiarepresentsanewVMSprovinceinSouthAmerica.

VMSdepositstypicallyoccurinclusters

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E L ROBLE MINE EXPLORAT ION UPS IDE

§  Mappingofmainlithologiesfor10kilometersthroughtheElRoblepropertythatcontrolmineraliza-on-stra-graphiccontactbetweenbasaltflowsandpelagicsediments

§  Wellunderstoodoccurrenceofmineraliza-oninfavorablelithology

§  Knowledgegainedfrommineinformsregionalexplora-on

§  Structuralcontrolss-llneedtobebeperunderstood

Wellunderstoodgeologicalmodel

SchemaXcRegionalConceptSecXon

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