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EDV: TSX FACTSHEET OCTOBER 2020 endeavourmining.com ENDEAVOUR  ABOUT US | FACT SHEET OCTOBER 2020

SENEGAL NIGER KARMA BURKINA FASO BOUNGOU MANA NABANGA HOUNDÉ GUINEA KALANA BANTOU BENIN

SIERRA TOGO NIGERIA LEONE FETEKRO GHANA CÔTE D’IVOIRE LIBERIA ITY AGBAOU REGIONAL OFFICE

Endeavour Mines Endeavour Development Projects

2020 TARGET Top 15 6 10Moz Global Gold Operational P&P Reserves Producer Mines +1Moz 1 Production at <$900/oz N o . 1 4 23Moz AISC Producer in Development M&I Resources West Projects 1

Acquired Etruscan 2010 (Agbaou project and Youga mine)

Merged with Adamus 2011 Endeavour Mining is a (Nzema mine) multi-asset gold producer focused on West Africa with a solid track record Acquired Avion 2012 (Tabakoto mine and of operational excellence, Houndé project) project development, exploration success and portfolio management Houndé Feasibility 2013 in the highly prospective Study published Greenstone Belt.

As a leading gold producer, Endeavour is committed to the principles of responsible 2014 Agbaou began mining and delivering sustainable value to its commercial production employees, stakeholders and the communities where it operates. Endeavour’s shares are listed on the Toronto Acquired Ity and formed a strategic partnership with Stock Exchange, under the trading symbol EDV 2015 and trade over-the-counter on the OTCQX under La Mancha who became a the symbol EDVMF. 30% shareholder

New CEO appointed Non-core Youga mine divested and True Gold 2016 (Karma mine) acquired Houndé construction began Five-year exploration strategy was launched Acquired Avnel (Kalana project) Houndé completed ahead of schedule and below budget 2017 Ity CIL plant construction began Non-core Nzema mine divested

1Moz indicated resource at Kari Pump 2018 (Houndé mine) Non-core Tabakoto mine divested Ity CIL plant completed ahead of schedule and below budget Upsize of Ity CIL plant to 5Mtpa 2019 1Moz Indicated resource at Kari West & Kari Center (Houndé mine)

2020 C$1 billion acquisition of SEMAFO 2 ENDEAVOUR MINING  WEST AFRICA: A GOLDEN OPPORTUNITY | FACT SHEET OCTOBER 2020

West Africa is one of the most attractive mining jurisdictions globally with many of the world’s leading gold producers operating there and investing in the region. UNDEREXPLORED AND HIGHLY PROSPECTIVE BIRIMIAN GREENSTONE BELT 4th 81% No.1 LARGEST GOLD GROWTH IN REGION GLOBALLY PRODUCING PRODUCTION OVER FOR RECENT REGION GLOBALLY PAST 15 YEARS DISCOVERIES +80Moz No.3 <$75/oz DISCOVERED IN REGION FOR ANNUAL DISCOVERY COST PAST DECADE EXPLORATION SPEND WHICH IS 3X LESS THAN THE GLOBAL AVERAGE

ENDEAVOUR: STRATEGICALLY POSITIONED IN WEST AFRICA WITH A STRONG TRACK RECORD OPERATORS | DEVELOPERS | EXPLORERS

Largest gold producer in West Africa Production and cost guidance either met or beaten over the past seven years Built four mines on schedule and within budget in the past decade with zero lost time injuries 8.4Moz of Indicated resources have been discovered since 2016 at a low discovery cost of <$15/oz Owns one of the largest exploration land packages in West Africa Has established a strong social license to operate with host countries and local communities WEST AFRICA: GOLDEN OPPORTUNITY 3

ATTRACTIVE MINING- MOVING FROM FRIENDLY JURISDICTION DEVELOPING TO EMERGING Responsible approach to mining MARKET STATUS development with modern environmental GDP growth rate amongst the highest in the standards world with controlled inflation of below 2% Swift permitting process which means Democratic elections held across most West timing from discovery to production can be African countries in past decade under three years Strong support from the IMF and World Bank Modern mining codes consistent with international principles Local governments are investing heavily in improved regional security with additional support from international partners Great human potential; significant improvement MALI NIGER in literacy and education over the past 10 years

SENEGAL Political and economic stability thanks to the BURKINA creation of a regional economic zone called the GUINEA FASO BISSAU BENIN West African Economic and Monetary Union CÔTE TOGO (UEMOA) which is similar to the European D’IVOIRE Union: • Common central bank for the eight francophone nations UEMOA Member States • Common currency (CFA Franc) which is pegged to the Euro • Fiscal and monetary policies tend to be aligned with guidance from IMF

CÔTE D’IVOIRE Population: 27.5m 2018 GDP: $43bn Unemployment rate: 2.5% 2018 GDP growth: 7.4% Literacy: 47.2% Corporate tax: up to 25% Internet users: 46.8% Mining royalties: up to 6%

BURKINA FASO Population: 20.8m 2018 GDP: $14.1bn Unemployment rate: 6.15% 2018 GDP growth: 6.8% Literacy: 41.2% Corporate tax: up to 27.5% Internet users: 16% Mining royalties: up to 5%

MALI Population: 19.5m 2018 GDP: $17.2bn Unemployment rate: 7.9% 2018 GDP growth: 4.9% Literacy: 35.5% Corporate tax: up to 25% Internet users: 13% Mining royalties: up to 6%

Sources: World Bank & CIA Factbook 2

4 ENDEAVOUR MINING  STRATEGIC POSITIONING ON TWO OF WEST AFRICA’S | FACT SHEET OCTOBER 2020

SENEGAL MOST PROLIFIC BELTS NIGER

Cavally River BURKINA FASO ITY BELT MALI Endeavour controls the full 125km stretch along the Ity Birimian Belt BENIN GHANA

GUINEA Toulepleu-Ity NIGERIA Greenstone CÔTE D’IVOIRE LIBERIA Ity Mine

C Ô T E D’IVOIRE LIBERIA

Birimian Greenstone Belts Mining Permits Exploration permits Deposits Cavally River Targets

0 Km 25 Toulepleu-Ity Greenstone

STRONG TRACK RECORD OF UNLOCKING EXPLORATION VALUE ACROSS THE GROUP

Screening and ranking +200 <$15/oz 8.4Moz methodology Exploration Discovery Discovered since disciplined approach targets cost mid-2016 EXPLORATION 5

HOUNDÉ BELT SENEGAL Endeavour has one of the largest footholds on the Hounde Belt, with two mines, a project NIGER and significant exploration tenements

MALI BURKINA FASO

BENIN Mana Mine GHANA CÔTE D’IVOIRE GUINEA NIGERIA

CÔTBirimianE Greenstone Belts D’IVOIRE Tarkwaian Type Sediments BURKINA LIBERIA Houndé Mine Exploration permits FASO JV Exploration Permits Mining Permits Deposits

Targets

0 Km 100

GHANA Bantou Exploration

Houndé Banfora Greenstone Greenstone Boromo Greenstone

C Ô TE D’IVOIRE

100% 5-YEAR DISCOVERY TARGET Excludes assets acquired in the SEMAFO transaction 80% 1.5Moz – 10Moz – Cumulative Indicated resources against 5-year discovery target 2.5Moz 15Moz 63% Indicated resources discovered 1.5Moz – 2.5Moz Indicated resources targeted 42% 2.1Moz 23% 1.9Moz 10% 1.3Moz 1.0Moz

H2–2016A 2017A 2018A 2019A 2020E 2021E Total 6 ENDEAVOUR MINING 

FETEKRO

ITY MINE

AGBAOU | FACT SHEET OCTOBER 2020

ABIDJAN

CÔTE D’IVOIRE

Ownership: 85% EDV, 10% Government, ITY MINE 5% SODEMI Production start date: 2019 for Ity CIL plant Mining method: Open Pit/Owner Mining The Ity mine is one of Endeavour’s cornerstone Processing technology: assets, it has the longest operating history of any 5Mtpa CIL Plant gold mine in Côte d’Ivoire, with more than 1.2Moz of Expected mine life: gold produced in its 20-plus years of operation. +10 years Workforce: The recent success of Endeavour’s near-mine exploration program which 940 discovered approximately 3.5Moz provided the opportunity to upgrade the small-scale, short life heap leach operation with a CIL plant. The CIL plant was successfully built ahead of schedule and below budget, achieving commercial production in Q2 2019. The mine has a production potential of 250koz/year over a +10-year life of mine at an attractive AISC. 235-255koz OPERATING PERFORMANCE Production 2020 Target 2017 2018 2019

Mining

Waste (kt) 5,237 2,901 8,320 Ore mined – Open Pit (kt) 1,410 1,127 5,733 $630-675/oz Processing AISC 2020 Target Ore processed (kt) 1,194 1,307 3,693

Grade (g/t) 1.85 2.49 1.88 Recovery (%) 83 81 86 3.1Moz Production (oz) 59,026 84,832 193,140 P&P Reserves As at December 31, 2019 Cash costs per ounce of gold sold

Cash cost 733 646 557

AISC ($/oz) 906 719 616 4.1Moz M&I Resources Current as at December 31, 2019 7

KARMA

OUAGADOUGOU HOUNDÉ MINE BOUNGOU MANA NABANGA

BANTOU

BURKINA FASO

Ownership: 90% EDV, 10% Government HOUNDÉ MINE Production start date: 2017 Mining method: Open Pit/Owner Mining Processing technology: The Houndé mine is one of Endeavour’s cornerstone 3Mtpa CIL Plant assets. The mine was built ahead of schedule Expected mine life: and below budget, with commercial production +10 years commencing in Q4-2017. Since then, the CIL plant has Workforce: consistently performed well and is able to operate at 1,860 more than 30% above nameplate capacity.

The goal is to delineate sufficient additional resources through near-mine exploration to sustain production above 250koz/year over a +10-year life of mine at an attractive AISC. In July 2020, a mining permit was granted and 230-250koz mining commenced at the Kari Pump deposit, part of the Kari Area, which will Production provide mill feed at significantly higher grades than the current active pits. 2020 Target OPERATING PERFORMANCE

2017 2018 2019

Mining

Waste (kt) 14,827 35,659 35,225 $865-895/oz AISC Ore mined – Open Pit (kt) 1,222 5,822 2,969 2020 Target

Processing

Ore processed (kt) 813 3,948 4,144 Grade (g/t) 2.75 2.29 1.83 2.2Moz Recovery (%) 95 94 93 P&P Reserves As at December 31, 2019 Production (oz) 68,754 277,218 223,304

Cash costs per ounce of gold sold

Cash cost 194 459 666

AISC ($/oz) 335 564 862 4.4Moz M&I Resources Current as at December 31, 2019 8 ENDEAVOUR MINING 

KARMA

BOUNGOU OUAGADOUGOU MINE MANA NABANGA | FACT SHEET OCTOBER 2020 HOUNDÉ BANTOU

BURKINA FASO

Ownership: 90% EDV, 10% Government BOUNGOU MINE Production start date: 2018 Mining method: Open Pit/Contractor Mining Processing technology: The Boungou mine is a low cost, high grade CIL Plant operation with significant exploration potential. Expected mine life: The mine was built on time and on budget by +7 years the previous owners, SEMAFO, and achieved Workforce: commercial production in Q3-2018. 280

The mine was placed on temporary care and maintenance in November 2019 in order to address regional security issues and started processing stockpiles in Q1-2020. Full mining operations are expected to restart in Q4-2020. The area around the mine is virtually unexplored and significant 130-150koz opportunity exists to identify additional resources. Production 2020 Target OPERATING PERFORMANCE

2018 2019

Mining

Waste (kt) 8,178 21,220 $680-725/oz AISC Ore mined – Open Pit (kt) 568 1,628 2020 Target Processing

Ore processed (kt) 368 1,000 Grade (g/t) 5.75 6.65 1.1Moz Recovery (%) 94 96 P&P Reserves As at December 31, 2019 Production (oz) 63,600 205,200

Cash costs per ounce of gold sold

Cash cost (US$/oz) 403 380 AISC (US$/oz) 596 497 1.7Moz M&I Resources As at December 31, 2019 9

KARMA

MANA MINE OUAGADOUGOU BOUNGOU NABANGA HOUNDÉ BANTOU

BURKINA FASO

Ownership: 90% EDV, 10% Government MANA MINE Production start date: 2008 Mining method: Open Pit/Owner Operator and Underground/Contractor Mining The Mana mine is located in the northern part Processing technology: of the highly prospective Houndé Greenstone CIL Plant Belt, approximately 60km north of Endeavour’s Expected mine life: Houndé mine. +8 years Workforce: The mine has been in operation for over a decade, producing over 2.1Moz 670 gold. Recent discoveries resulted in the development of the Siou underground mine, using the long-hole method, which was completed in Q1-2020. OPERATING PERFORMANCE 2016 2017 2018 2019 185-205koz Mining Production 2020 Target Waste – Open Pit (kt) 35,023 38,710 33,646 28,082

Ore mined – Open Pit (kt) 2,176 2,268 2,110 1,338

Total mined – – – – 100 Underground (kt) $1,050-1,120/oz Ore mined – – – – 100 AISC Underground (kt) 2020 Target Processing

Ore processed (kt) 2,753 2,740 2,574 2,061 Grade (g/t) 2.88 2.46 2.36 2.28 1.4Moz Recovery (%) 94 95 93 90 P&P Reserves As at December 31, 2019 Production (oz) 240,200 206,400 181,000 135,700

Cash costs per ounce of gold sold Cash cost (US$/oz) 548 655 796 762 4.1Moz AISC (US$/oz) 720 942 1,056 1,095 M&I Resources As at December 31, 2019 10 ENDEAVOUR MINING  FETEKRO

AGBAOU ITY MINE | FACT SHEET OCTOBER 2020

ABIDJAN

CÔTE D’IVOIRE

Ownership: 85% EDV, 10% Government, AGBAOU MINE 5% SODEMI Production start date: 2014 Mining method: Open Pit/Contractor Mining The Agbaou mine has been a significant cash Processing technology: flow contributor for Endeavour over the past CIL Plant several years. Expected mine life: 2-3 years In mid-2016, a secondary crusher was constructed and provides the flexibility Workforce: to blend oxide ore with higher grade, harder fresh ore. The plant is able to 1,140 maintain a sustainable throughput rate averaging more than 30% above nameplate capacity. OPERATING PERFORMANCE 2017 2018 2019 115-125koz Mining Production 2020 Target Waste (kt) 25,117 27,336 23,166

Ore mined – Open Pit (kt) 2,983 2,399 2,183

Processing Ore processed (kt) 2,906 2,830 2,699 $940-990/oz Grade (g/t) 2.02 1.70 1.62 AISC 2020 Target Recovery (%) 94 94 95

Production (oz) 177,191 141,335 137,537 Cash costs per ounce of gold sold 0.3Moz Cash cost (US$/oz) 557 677 622 P&P Reserves As at December 31, 2019 AISC ($/oz) 647 819 796

0.5Moz M&I Resources As at December 31, 2019 11

KARMA MINE

OUAGADOUGOU BOUNGOU MANA NABANGA HOUNDÉ BANTOU

BURKINA FASO

Ownership: 90% EDV, 10% Government KARMA MINE Production start date: 2016 Mining method: Shallow Open Pit/ Contractor Mining The Karma mine is a low-grade heap leach operation Processing technology: and consists of several gold deposits which are Heap Leach shallow, open pittable with little blasting required Expected mine life: and a low strip ratio. 2-3 years Workforce: In 2017, an optimization project was completed to lift the stacking capacity. 1,660 OPERATING PERFORMANCE

2016 2017 2018 2019

Mining 100-110koz Production Waste (kt) 11,451 12,217 15,690 2020 Target Ore mined (kt) 3,862 4,715 3,745

Processing

Ore processed (kt) 2,089 3,552 4,097 4,196

Grade milled (g/t) 1.16 1.07 0.95 0.91 $980-1,050/oz AISC Recovery (%) 90% 83% 82% 82% 2020 Target

Production (oz) 61,813 97,982 108,773 96,534

Cash costs per ounce of gold sold

Cash cost (US$/oz) 657 716 704 783 0.3Moz P&P Reserves AISC (US$/oz) 738 834 813 903 As at December 31, 2019

2.0Moz M&I Resources As at December 31, 2019 12 ENDEAVOUR MINING  PROVEN AND EXPERIENCED MINE BUILDERS | FACT SHEET OCTOBER 2020

Endeavour has successfully built four mines in West Africa over the past decade and established a strong construction track record for high quality projects. Synergies in plant design have been leveraged at the Agbaou, Houndé and Ity mines, with all plants currently operating above nameplate capacity.

Nzema* | Ghana Agbaou | Cote d’Ivoire

DFS, DESIGN, CONSTRUCT, COMMISSION AND OPERATE DFS, DESIGN, CONSTRUCT, COMMISSION AND OPERATE

Construction time: 14 months (2008–2010) Construction time: 14 months (2012–2014)

On Ahead of 0 Below Ahead of 0 budget schedule LTIs budget schedule LTIs

*divested in 2017

Houndé | Burkina Faso Ity CIL Project | Cote d’Ivoire

DESIGN, CONSTRUCT, COMMISSION AND OPERATE DESIGN, CONSTRUCT, COMMISSION AND OPERATE

Construction time: 17 months (2016–2017) Construction time: 18 months (2018–2019)

Below Ahead of 0 Below Ahead of 0 budget schedule LTIs budget schedule LTIs PROJECTS 13 PROJECT PIPELINE

While the main focus for 2020 is cash flow generation, Endeavour is also continuing to build optionality within its portfolio by advancing studies and conducting exploration on both the Fetekro and Kalana Projects.

Studies are underway with the aim of publishing a Preliminary Economic Assessment on Fetekro and a Preliminary Feasibility Study on Kalana in H2-2020.

Daoukro Cluster Bondoukou Cluster Côte d’Ivoire Kofi Trend Côte d’Ivoire Nabanga Mali Burkina Faso Boungou Ity Siguiri Fetekro Agbaou Guinea Côte d’Ivoire Fougadian Sia/Sianikoui Mali Barrick JV Houndé Trend Côte d’Ivoire Bantou Burkina Faso Mana Karma Houndé Liptako Mt. Ba/Gueya Kalana Niger Deep Agbaou Mali Liguidi Côte d’Ivoire Tiepleu Côte d’Ivoire Burkina Faso Ity Trend IMMEDIATE CASH FLOW NEAR-TERM GROWTH FROM PRODUCTION LONG-TERM UPSIDE FROM PROJECTS FROM GREENFIELD EXPLORATION

KEY FACTS Ownership: 65% Endeavour, Mining Method: Open pittable Resource (2020): 2.5Moz Indicated and 0.1Moz Inferred FETEKRO PROJECT Located in north-central Côte d’Ivoire, approximately 500km from Abidjan, within the northern-end of the Oumé-Fetekro greenstone belt, Fetekro was ranked as a top greenfield target, following our strategic exploration review in late 2016. A maiden resource for the Lafigué target was published in October 2018, with an updated indicated resource of 1.2Moz published in September 2019, on which an initial PEA was based, already demonstrating robust project economics including a pre-tax NPV5% of $372m and an IRR of 37% at a $1,500/oz gold price. In 2020, the Indicated resource for the Lafigué deposit has grown by 108% to 2.5Moz at 2.40g/t Au and the Lafigué resource estimate now encompasses a mineralized area extending over 2km long by 1km with the deposit remaining open at depth and along strike. The 2.5Moz Fetekro resource has been found at a very low discovery cost of $7.50 per Indicated resource ounce. The Lafigué resource is of high quality, with metallurgical testwork indicating gold recovery of over 95%, with a significant portion recoverable by gravity. There is no large relocation required and the property is located close to existing infrastructure. An updated PEA based on the larger 2.5Moz Indicated resource is expected to be published in the coming months. 14 ENDEAVOUR MINING  | FACT SHEET OCTOBER 2020

KALANA PROJECT Located approximately 270km South of Bamako, the capital city of KEY FACTS Mali, the Kalana Project was acquired in 2017. A feasibility study was Ownership: completed on the project in 2016 by the prior owner which confirmed 90% EDV, 10% Government the opportunity for a long life, low cost gold operation. of Mali Endeavour expects to take advantage of its construction expertise, Mining method: operating synergies and exploration experience to redesign and Open pittable optimize the current feasibility study, which is expected to increase Resource (2019): the annual production profile and improve already attractive project 3.0Moz M+I Resources economics. Endeavour has also identified additional resources that will as at December 31, 2019* be incorporated in the updated feasibility study, which is expected to be Reserve (2019): published in H2-2020. 1.96Moz P+P Reserves as at December 31, 2019*

*As per Avnel study dated March 30, 2016 PROJECTS 15

KEY FACTS Ownership: 100% Endeavour (Bantou area) 80.09% Endeavour/19.91% Sarama (Karankasso area) Mining method: Open pittable Reserve (2019): 2.2Moz Inferred Resources as at December 31, 2019 BANTOU PROJECT The Bantou Project was acquired by Endeavour in July 2020 as part of the SEMAFO acquisition. Located approximately 300km southwest of Ouagadougou, the capital city of Burkina Faso, Bantou is part of the Dynikongolo permit which is located along the prolific Houndé Greenstone Belt that hosts both the Mana and Houndé mines. Bantou currently consists of eight mineralized zones with diverse mineralization styles and grades. The project is host to an Inferred Resource comprised of three main areas with the majority of the tonnes and ounces centred on the Bantou and Bantou Nord Zones. The Bantou Nord Zone was discovered in 2019 and totals 1.1Moz of pit-constrained Inferred resources with a pit shell strip ratio of 1:1 and is located 1.5km north of the Bantou Zone.

KEY FACTS Ownership: 100% EDV Mining method: Open pittable and underground Reserve (2019): 0.8Moz Inferred Resources as at December 31, 2019

NABANGA PROJECT The Nabanga Project was acquired by Endeavour in July 2020 as part of the SEMAFO transaction. Located approximately 250km southeast of Ouagadougou, the capital city of Burkina Faso, Nabanga is an early stage project which consists of three exploration permits covering 178.5km²: Kamsongo, Napadé and Nabanga. The previous owners completed a Preliminary Economic Study on the project in September 2019 which indicated the potential for an economic project with an after-tax NPV (5%) of $100m based on an Inferred resource of 841koz. Endeavour will evaluate this project in the context of its overall exploration portfolio during H2-2020 and will determine next steps by the end of the year. 16 ENDEAVOUR MINING  ESG HIGHLIGHTS | FACT SHEET OCTOBER 2020

HEALTH & SAFETY OUR EMPLOYEES

At Endeavour, our approach to health We aim to be an employer of choice. We are and safety is simple – we believe that all committed to attracting and retaining top occupational injuries and work-related illnesses talent by providing a dynamic workplace that are preventable and our aim is ‘Zero Harm’. offers a range of experiences and career This is a collective responsibility involving all development opportunities and is respectful our employees, subcontractors and our host and inclusive and protects worker rights. communities and we require our contractors to Endeavour is a major employer in Côte d’Ivoire comply with our health and safety principles. and Burkina Faso. To support the development of our host FY-2019 PERFORMANCE countries, our long-term goal is to hire close to 100% of our workforce directly from the country in which the mine is located.

0 FATALITIES FY-2019 PERFORMANCE 30% REDUCTION IN GROUP AIFR 95% OF OUR WORKFORCE 44% ARE NATIONALS REDUCTION IN GROUP LTIFR 35% are from host communities Two West Africans promoted to 5.5% reduction in on-site malaria General Manager positions cases vs 10% target 8% female workforce Almost 50% reduction of malaria cases at our Houndé mine 8% women in management Malaria Incidence Rate 216.2 11% women in technical roles

2020 TARGET 2020 TARGET 10% reduction in Group AIFR and To increase our female LTIFR and onsite malaria cases workforce by 25% to 10% ESG HIGHLIGHTS 17

OUR ENVIRONMENT FY-2019 PERFORMANCE

We recognize that the long-term success of our business is dependent upon good stewardship of the environment across the 77% life cycle of our operations. OF PURCHASED ELECTRICITY We closely monitor and seek to continuously FROM THE GRID IS FROM improve our performance in energy RENEWABLE ENERGY SOURCES consumption, efficiency and emissions, water usage, biodiversity and waste management. 22% REDUCTION IN GHG EMISSION 2020 TARGET INTENSITY CO2-E/OZ GOLD PRODUCED Develop an Emissions Reduction Target informed by Energy intensity of 1.61kWh climate science and identify per ounce of gold produced pathways to achievement Augmented disclosure with Commence reporting in line Scope 3 emissions with TCFD

Emissions Scope 1 & 2

(tonnes CO2-e) 2017 2018 2019 Scope 1 315,209 326,405 216,345 2019 EMISSIONS Scope 2 9,137 34,850 35,955 SCOPE 1 & 2 Total 324,346 361,255 252,300

Emissions Scope 3 Calculated as 7,264 tCO2e 18 ENDEAVOUR MINING  | FACT SHEET OCTOBER 2020

ETHICAL BUSINESS OUR COMMUNITIES

Endeavour is committed to high standards of Our local communities are at the heart of our ethical business practices. operations’ livelihoods and fundamental to our day-to-day work. We are committed to building We have put in place a framework that and maintaining strong relationships in a fosters good governance, is practical for a transparent manner. These relationships are company of our size and satisfies our current underpinned by open and constructive dialogue listing and regulatory requirements. with our communities, host governments, NGOs and other local and national stakeholders FY-2019 PERFORMANCE across all stages of our mines’ life cycle.

REPORTED FY-2019 PERFORMANCE CASES OF BRIBERY $627m OF ECONOMIC VALUE 33% DISTRIBUTED FEMALE BOARD REPRESENTATION Implemented ESG targets $100m that are linked to both the PAID IN TAXES AND ROYALTIES short and long-term incentive TO HOST COUNTRIES compensation schemes Adopted the World Gold Council’s Responsible Gold $376m Mining Principles (RGMPs) 67% OF TOTAL BUDGET, as the primary ESG-reporting SPENT ON IN-COUNTRY SUPPLIERS framework 8/9 Directors are independent 3,394 indirect jobs created by our operations supporting 2020 TARGET 1,144 businesses Commence assurance of 2020 TARGET the RGMPs To implement a standardized Supplier Code of Conduct ESG HIGHLIGHTS 19

CASE STUDY ECODEV ECODEV is an economic development fund established by Endeavour to support local economic growth by promoting and investing in the creation of local long-term, sustainable, small and medium enterprises. Similar to a traditional investment fund, the aim is During 2019, ECODEV also evaluated the opportunity to co-invest with other partners to create successful to invest in the ‘Ranch du Tuy’ project, a cattle and sustainable businesses, which over time will feedlot with integrated slaughterhouse and meat allow Endeavour to exit its investments and redeploy production near the Houndé mine in Tuy Province, its capital into new ventures. Management of each Burkina Faso. Local co-investors have been identified project is led by ClassM, specialists in economic and negotiations are underway to finalize their development projects in Africa. investment in the project. In addition, land for the project was purchased and the Environmental In May 2019, ECODEV made its first investment and Social Impact Studies have started and are of $1 million in Mali Shi, a shea butter processing expected to be completed in 2020. This will then factory near Bamako, Mali. This project was enable construction of the Ranch du Tuy facilities to chosen as it will support approximately 120,000 start. This project is attractive because it will have female shea nut growers in Mali, including our a meaningful and positive impact for thousands of Kalana development project area and create the herders in the region surrounding the Houndé mine, first industrial shea butter factory in Mali. Mali Shi as well as benefiting local farmers who will supply has structured 32 formal cooperatives comprising the feedlot with maize and fodder. of over 4,500 women living in the Kalana area around Endeavour’s project, which supplied 450 tonnes of nuts during the 2019 harvest. The factory is expected to be commissioned during 2020, depending on COVID-19, and is targeting an annual commercial production of 10,000 tonnes of shea butter by 2025. 20 ENDEAVOUR MINING  RESERVES AND RESOURCES | FACT SHEET OCTOBER 2020

Current as at December 31, 2019

ON A 100% BASIS ON AN ATTRIBUTABLE BASIS

Resources shown Tonnage Grade Content Tonnage Grade Content inclusive of Reserves (Mt) (Au g/t) (Au koz) (Mt) (Au g/t) (Au koz)

ENDEAVOUR MINING TOTAL

Proven Reserves 26.2 2.05 1,731 22.5 2.06 1,491

Probable Reserves 129.9 2.08 8,670 113.3 2.08 7,566

P&P Reserves 156.1 2.07 10,401 135.8 2.07 9,058

Measured Resource (incl. reserves) 37.3 2.47 2,962 32.6 2.42 2,538

Indicated Resources (incl. reserves) 307.6 1.99 19,656 265.7 1.97 16,807

M&I Resources (incl. reserves) 344.8 2.04 22,628 298.4 2.02 19,354

Inferred Resources 110.1 1.78 6,289 101.2 1.77 5,774

ITY MINE (85% owned except 100% owned Le Plaque area)

Proven Reserves 9.4 1.05 318 8.0 1.05 271

Probable Reserves 52.7 1.67 2,825 45.6 1.67 2,464

P&P Reserves 62.1 1.57 3,144 53.6 1.57 2,734

Measured Resource (incl. reserves) 10.3 1.02 337 8.7 1.02 286

Indicated Resources (incl. reserves) 71.4 1.62 3,727 61.9 1.62 3,272

M&I Resources (incl. reserves) 81.7 1.55 4,064 70.6 1.55 3,558

Inferred Resources 18.3 1.33 782 15.7 1.33 673

HOUNDÉ MINE (90% owned)

Proven Reserves 1.8 1.57 89 1.6 1.57 80

Probable Reserves 30.9 2.09 2,075 27.8 2.09 1,867

P&P Reserves 32.6 2.06 2,164 29.4 2.06 1,948

Measured Resource (incl. reserves) 1.7 1.75 96 1.5 1.75 87

Indicated Resources (incl. reserves) 72.7 1.86 4,343 65.4 1.86 3,908

M&I Resources (incl. reserves) 74.4 1.85 4,439 67.0 1.85 3,995

Inferred Resources 7.9 1.89 480 7.1 1.89 432 RESERVES AND RESOURCES 21

ON A 100% BASIS ON AN ATTRIBUTABLE BASIS

Resources shown Tonnage Grade Content Tonnage Grade Content inclusive of Reserves (Mt) (Au g/t) (Au koz) (Mt) (Au g/t) (Au koz)

KARMA MINE (90% owned)

Proven Reserves 3.1 0.85 84 2.8 0.85 75

Probable Reserves 6.1 1.06 209 5.5 1.06 188

P&P Reserves 9.2 0.99 293 8.3 0.99 264

Measured Resource (incl. reserves) 0.3 0.38 4 0.3 0.38 3

Indicated Resources (incl. reserves) 52.3 1.21 2,038 47.0 1.21 1,834

M&I Resources (incl. reserves) 52.6 1.21 2,042 47.3 1.21 1,838

Inferred Resources 15.7 1.35 681 14.1 1.35 613

MANA MINE (90% owned)

Proven Reserves 3.3 3.56 374 2.9 3.56 336

Probable Reserves 11.8 2.73 1,034 10.7 2.72 934

P&P Reserves 15.0 2.91 1,407 13.6 2.90 1,270

Measured Resource (incl. reserves) 11.9 2.11 806 11.3 2.05 745

Indicated Resources (incl. reserves) 45.9 2.26 3,334 42.5 2.22 3,038

M&I Resources (incl. reserves) 57.7 2.23 4,139 53.8 2.19 3,783

Inferred Resources 8.9 2.66 766 8.4 2.62 706

BOUNGOU MINE (90% owned)

Proven Reserves 2.1 5.04 340 1.9 5.04 306

Probable Reserves 7.1 3.38 769 6.4 3.38 692

P&P Reserves 9.2 3.76 1,109 8.3 3.76 998

Measured Resource (incl. reserves) 2.1 6.05 401 1.9 6.05 361

Indicated Resources (incl. reserves) 11.0 3.68 1,298 9.9 3.68 1,168

M&I Resources (incl. reserves) 13.0 4.06 1,699 11.7 4.06 1,529

Inferred Resources 1.3 2.98 126 1.2 2.98 114

AGBAOU MINE (85% owned)

Proven Reserves 1.5 0.71 34 1.3 0.71 29

Probable Reserves 4.8 1.86 286 4.1 1.86 243

P&P Reserves 6.3 1.58 321 5.4 1.58 273

Measured Resource (incl. reserves) 1.5 0.76 38 1.3 0.76 32

Indicated Resources (incl. reserves) 6.0 2.49 481 5.1 2.49 409

M&I Resources (incl. reserves) 7.6 2.14 519 6.4 2.14 441

Inferred Resources 0.7 1.59 37 0.6 1.59 31 22 ENDEAVOUR MINING  ON A 100% BASIS ON AN ATTRIBUTABLE BASIS

Resources shown Tonnage Grade Content Tonnage Grade Content inclusive of Reserves (Mt) (Au g/t) (Au koz) (Mt) (Au g/t) (Au koz)

| FACT SHEET OCTOBER 2020 FETEKRO (65% owned)

Proven Reserves – – – – – –

Probable Reserves – – – – – –

P&P Reserves – – – – – –

Measured Resource (incl. reserves) – – – – – –

Indicated Resources (incl. reserves) 32.0 2.40 2,471 20.8 2.40 1,606

M&I Resources (incl. reserves) 32.0 2.40 2,471 20.8 2.40 1,606

Inferred Resources 0.8 2.52 66 0.5 2.52 43

KALANA PROJECT (80% owned)

Proven Reserves 5.1 3.00 492 4.1 3.00 394

Probable Reserves 16.6 2.76 1,472 13.3 2.76 1,177

P&P Reserves 21.7 2.81 1,964 17.4 2.81 1,571

Measured Resource (incl. reserves) 9.5 4.19 1,280 7.6 4.19 1,024

Indicated Resources (incl. reserves) 16.3 3.74 1,964 13.1 3.74 1,571

M&I Resources (incl. reserves) 25.8 3.92 3,254 20.7 3.92 2,603

Inferred Resources 1.9 4.41 265 1.5 4.41 212

BANTOU (100% owned)

Proven Reserves – – – – – –

Probable Reserves – – – – – –

P&P Reserves – – – – – –

Measured Resource (incl. reserves) – – – – – –

Indicated Resources (incl. reserves) – – – – – –

M&I Resources (incl. reserves) – – – – – –

Inferred Resources 51.1 1.37 2,245 48.7 1.35 2,110

NABANGA (100% owned)

Proven Reserves – – – – – –

Probable Reserves – – – – – –

P&P Reserves – – – – – –

Measured Resource (incl. reserves) – – – – – –

Indicated Resources (incl. reserves) – – – – – –

M&I Resources (incl. reserves) – – – – – –

Inferred Resources 3.4 7.69 841 3.4 7.69 841 NOTES TO THE RESERVES AND RESOURCES STATEMENT The mineral reserves and resources (“MRE”) were estimated as at 9. The Kalana Main deposit Mineral Resource is stated as per that December 31, 2019 in accordance with the provisions adopted by published by Avnel, which forms the basis on which the stated Mineral the Canadian Institute of Mining Metallurgy and Petroleum (CIM) and Reserves were estimated. incorporated into the NI 43-101. The Qualified Persons responsible for the In March 2019, Endeavour published an updated MRE for the Kalana mineral reserve and resource estimates are detailed in the following tables. Main deposit. The comparison between the Avnel MRE and the Endeavour The Qualified Persons listed below are independent of Endeavour, except MRE is demonstrated in the table below: Salih Ramazan, François Thibert and Kevin Harris. PREVIOUS 2016 UPDATED 2019 (on a 100% basis) M&I RESOURCE M&I RESOURCE MINERAL RESOURCES Cut-off grade (g/t Au) 0.9 0.9 (For comparative 0.5 QUALIFIED PERSON POSITION PROPERTY/DEPOSIT purpose) Kevin Harris Vice President, Colline Sud, Le Plaque (Ity); Tonnage (Mt) 23 18 27 CPG Resources, Endeavour Bouéré Dohoun, Kari Pump, Kari West, Kari Center (Houndé) Grade (g/t Au) 4.14 3.7 2.69 Mark Zammit Principal, Cube Ity (except Colline Sud and Le Content (Au koz) 3,060 2,092 2,290 MAIG Consulting Pty Ltd Plaque); Vindaloo-Madras (Houndé) The 2019 Kalana Main geological model was prepared by Helen Oliver. François Thibert Director, Group Reserve Boungou, Mana, M.Sc., P.Geo. and Resource Estimation Bantou, Nabanga Ms Oliver FGS, CGeol is Endeavour Mining’s Group Resource Geologist and a Qualified Person as defined by NI 43-101. The 2019 Kalana Main MINERAL RESERVES Resource Estimate was prepared by Geoff Booth, FAusIMM, Mining Consulting Manager for Snowden Mining Industry Consultants Pty Ltd and QUALIFIED PERSON POSITION PROPERTY/DEPOSIT a Qualified Person as defined by NI 43-101. Salih Ramazan Vice President – Colline Sud, Le Plaque (Ity); The Kalana Main MRE is constrained within a $1,500/oz gold Whittle MAusIMM Mine Planning, Bouéré Dohoun, Kari Pump, pit shell as a limit of economic extraction, defined using the following Endeavour Mining Kari West, Kari Center (Houndé) parameters (all costs are in US dollars): Allan Earl Executive Consultant, Ity (except Colline Sud and FAusIMM Snowden Mining Industry Le Plaque); Vindaloo-Madras • Slope angles – Oxide 32°, Transition 45°, Fresh 54° Consultants (Pty) Ltd (Houndé) • Au recovery – Oxide 96.2%, Transition – 88.5%, Fresh – 89% • Gold price = $1,500/oz François Thibert Director, Group Reserve Boungou, Mana, M.Sc., P.Geo. and Resource Estimation Bantou, Nabanga • Mining cost (Oxide base cost at 380 mRL) = Bulk $1.97/t, semi-selective $2.06/t, selective $2.34/t 1. The mineral resources and reserves have been estimated and reported • Mining cost (Transition base cost at 380 mRL) = Bulk $1.79/t, semi-selective in accordance with Canadian National Instrument 43-101, ‘Standards of $1.98/t, selective $2.18/t Disclosure for Mineral Projects’ and the Definition Standards adopted by • Mining cost (Fresh base cost at 380 mRL) = Bulk $2.41/t, semi-selective $3.08/t, selective $3.37/t CIM Council in May 2014. • Mining cost (depth cost below 380 mRL) = 0.005/t/m 2. Mineral resources that are not mineral reserves do not have • Processing cost – Oxide $16.64/t, Transition $20.37/t, Fresh $21.40/t demonstrated economic viability. • Selling cost – $58/oz 3. All Mineral Resources are reported inclusive of The scientific and technical information relating to the mines and projects Mineral Reserves. contained in this document has been derived from or based on the following 4. Tonnages are rounded to the nearest 100,000 tonnes; gold grades technical reports. Copies of the reports are available electronically on are rounded to two decimal places; ounces are rounded to the nearest SEDAR at www.sedar.com under the Corporation’s profile. The Kalana report 1,000oz. Rounding may result in apparent summation differences is available under the Avnel Gold Mining profile on SEDAR. The Mana, between tonnes, grade and contained metal. Boungou, Bantou and Nabanga reports are available under the SEMAFO 5. Tonnes and grade measurements are in metric units; profile on SEDAR. contained gold is in troy ounces. • Agbaou mine: ‘Technical Report, Mineral Resource and Reserve Update 6. Errors may occur due to rounding of numbers. for the Agbaou Gold Mine, Côte d’Ivoire, West Africa’, dated effective December 31, 2014. 7. Processing recoveries vary at each pit by many factors including • Ity mine: ‘Technical Report on the Ity Gold Mine, Republic of Côte d’Ivoire’, material types, mineralogy and chemistry of the ore. The overall average dated June 15, 2020 and effective December 31, 2019. recoveries are around 81% at Ity and Karma, 90% at Hounde and • Ity mine: Resources were updated in July 2020 with results published in the Agbaou. Gold recoveries are those of the reserves for the saprolite/oxide July 7, 2020 press release available on the Company’s website. and the saprock/transition horizons for all deposits. For the bedrock/ • Karma mine: ‘Technical Report on an updated Feasibility Study and a Preliminary sulphide portion, gold recovery has been set at 81% for Wona-Kona, Economic Assessment for the Karma Gold Project, Burkina Faso, West Africa’, dated 96% for Siou, 91% for Yama and 48% for Yaho and Maoula. Recoveries effective August 10, 2014. are set to 19% to 29% for Nyafé, Fofina, F67, Fobiri with the assumption • Houndé mine: ‘Houndé Gold Mine Technical Report’, dated June 15, 2020 and that sulphide mineralization is considered refractory and cannot be effective December 31, 2019. recovered economically with the current CIL process. • Houndé mine: Resources were updated in July 2020 with results published in the July 22, 2020 press release available on the Company’s website. 8. The reporting of mineral reserves and resources are based on a gold • Kalana Project: ‘NI 43-101 Technical Report on Kalana Main Project’, dated effective price as detailed below: March 30, 2016. • Mana Mine: ‘Mana Property, Burkina Faso, NI 43-101 Technical Report Disclosing the PROJECT Agbaou1 Kalana1 Ity1 Karma2 Houndé1 Results of the Siou Underground Prefeasibility Study’, dated effective Reserves Au price $/oz 1,300 1,200 1,300 1,350 1,300 December 31, 2017. Resources Au price $/oz 1,500 1,400 1,500 1,500 1,500 • Boungou Mine: ‘Natougou Gold Deposit Project, Burkina Faso, NI 43-101 Technical Report – Feasibility Study’, dated effective March 23, 2016. PROJECT Fetekro1 Boungou3 Mana4 Bantou5 Nabanga6 • Bantou Project: ‘Bantou Project, NI 43-101 Technical Report – Mineral Resource Estimate’, dated effective December 31, 2019. Reserves Au price $/oz n/a 1,200 1,200 n/a n/a • Nabanga Project: ‘Nabanga Project, NI 43-101 Technical Report – Resources Au price $/oz 1,500 1,400 1,400 1,500 1,300 Preliminary Economic Assessment’, dated effective September 30, 2019.

1. Cut-off grades for all resources open pits are 0.5g/t Au, except at Kalana where the cut-off grade is at 0.9g/t Au and at Karma where the cut-off grade is defined by material type: Oxide = 0.2, Transition = 0.22 and Sulfide =0 .5. Cut-off grades for reserves except for Kalana vary between 0.3-0.5g/t for Oxide ore, 0.3-0.8g/t for Transition ore & 0.3-0.7g/t for Sulfide ore. 2. Kao, GG2, and Rambo have a gold price of $1,557/oz. Gold price for Kao Main and Rambo West reserves is $1,350/oz. 3. Cut-off grades for Boungou resources are defined by material type: Oxide = 0.92, Transition and Sulfide = 0.96. Cut-off reserves are defined by material type: Oxide = 0.91, Transition and Sulfide = 1.05. 4. Cut-off grades for Mana resources differ by pit and are defined by material type. Wona: Oxide = 0.35, Transition = 0.47 and Sulfide = 0.54; Siou OP: Oxide = 0.44, Transition = 0.51 and Sulfide = 0.54; Siou UG: 2g/t Au. Mana cut-off reserves differ by pit and are defined by material type. Wona: Oxide = 0.51, Transition = 0.68 and Sulfide = 0.78; Siou OP: Oxide = 0.64, Transition = 0.75 and Sulfide = 0.78; Siou UG: 2.6g/t Au. 5. Cut-off grade for Bantou pit shell resource ranges from 0.43g/t to 0.86g/t and cut-off for resource below pit shell is 2.0g/t. 6. Nabanga resource is reported above a cut-off grade of 3.0 g/t Au. CORPORATE OFFICE 5 Young Street London W8 5EH United Kingdom T: +44 203 011 2723 CONTACT US T: +44 203 011 2719 OPERATIONS OFFICE [email protected] Hotel Palm Club Follow us: Croisement Boulevard Latrille et rue du Lycée Technique Abidjan 08 BP 872 Côte d’Ivoire endeavourmining.com T: +225 22 48 99 00

CAUTIONARY NOTE ON FORWARD-LOOKING STATEMENTS This Fact Sheet contains “forward-looking statements” including but not tax rules and regulations and political and economic developments in limited to, statements with respect to Endeavour’s plans and operating countries in which Endeavour operates. Although Endeavour has attempted performance, the estimation of mineral reserves and resources, the to identify important factors that could cause actual results to differ timing and amount of estimated future production, costs of future materially from those contained in forward-looking statements, there may production, future capital expenditures and the success of exploration be other factors that cause results not to be as anticipated, estimated activities. Generally, these forward-looking statements can be identified or intended. There can be no assurance that such statements will prove by the use of forward-looking terminology such as “expects”, “expected”, to be accurate, as actual results and future events could differ materially “budgeted”, “forecasts” and “anticipates”. from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements. Please refer to Forward-looking statements, while based on management’s best Endeavour’s most recent Annual Information Form filed under its profile at estimates and assumptions, are subject to risks and uncertainties that sedar.com for further information respecting the risks affecting Endeavour may cause actual results to be materially different from those expressed and its business. or implied by such forward-looking statements, including but not limited to: risks related to the successful integration of acquisitions; risks related This Fact Sheet may include certain terms or performance measures to international operations; risks related to general economic conditions commonly used in the mining industry that are not defined under and credit availability, actual results of current exploration activities, International Financial Reporting Standards (“IFRS”), including “cash unanticipated reclamation expenses; changes in project parameters as operating costs”, “all-in sustaining costs” (or “AISC”) and “adjusted plans continue to be refined; fluctuations in prices of metals including cash operating costs”. Non-IFRS measures do not have any standardized gold; fluctuations in foreign currency exchange rates, increases in market meaning prescribed under IFRS and therefore they may not be comparable prices of mining consumables, possible variations in ore reserves, grade to similar measures employed by other companies. The data presented is or recovery rates; failure of plant, equipment or processes to operate intended to provide additional information and should not be considered as anticipated; accidents, labour disputes, title disputes, claims and in isolation or as a substitute for measures of performance prepared in limitations on insurance coverage and other risks of the mining industry; accordance with IFRS and should be read in conjunction with Endeavour’s delays in the completion of development or construction activities, consolidated financial statements, available on our website. changes in national and local government regulation of mining operations,