Endeavour Mining Results Presentation Deck

Power TACKLING INFLATIONARY PRESSURES Shielded in Q1-2022 due to fuel pricing mechanism and long-term contracts Other costs Logistics Drilling Royalties Salaries Spares All-in cost breakdown Fuel > 75% of Endeavour's fuel exposure is LFO. HFO is only used at Boungou, Waghnion, and Sabodala-Massawa with optionality to switch gensets to LFO > Fuel price is regulated by in-country based pricing mechanisms where prices are revised on a monthly or quarterly basis, which shelters Endeavour from paying peak spot international fuel prices Contractors > Impact in Q1-2022 has been limited and we expect a price increase in Q2-2022, estimated to represent approx. $40/oz Q4-2021 Average fuel price variance, $/L Q1-2022 +16% 1.06 1.22 Burkina Faso LFO +9% 0.85 0.92 +2% ENDEAVOUR 0.90 0.92 MINING -2%) 0.89 0.87 Burkina Cote Senegal Faso HFO d'Ivoire LFO LFO +9% 0.61 0.67 Senegal HFO +29% 0.47 Brent Crude 0.61 Consumables > Contract length, price variations provision and size helps to mitigate inflationary pressures on key consumables. More than 70% of our procurement is sourced in-country and many contracts have delivered-to-site pricing; this has limited higher freight cost impact > Cyanide, which represents 3-4% of the cost base, has experienced no price variation due to long-term contracts in place > Explosives, which represents 3-4% of the cost base, increased by ~40% in Q1-2022 compared to Q4-2021, which represented an impact of approx. $10/oz › Grinding media, which represents <2% of the cost base, has experienced no price variation due to long-term contract in place in Q1-2022 and is expected to increase by <5% in Q2-2022 representing <$2/oz > Lime, which represents <1% of the cost base, has experienced no price variation due to long-term contract in place in Q1- 2022 and is expected to increase by 8% in Q2-2022 representing <$1/oz Other offsetting factors > Favourable FX variation as the Euro has decreased by 3% compared to the US$ in Q1-2022, given that approximately 65% of the operating cost base is in local currency, which is linked to the Euro > Several cost optimization and efficiency improvement initiatives are ongoing across the group 20

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