Endeavour Achieves First Gold Pour At Sabodala-Massawa Expansion

First gold delivered in only 2 years · On budget and on schedule · 0 LTIs with over 3.5m man hours worked

ENDEAVOUR ACHIEVES FIRST GOLD POUR AT SABODALA-MASSAWA EXPANSION

First gold delivered in only 2 years · On budget and on schedule · 0 LTIs with over 3.5m man hours worked

HIGHLIGHTS: First gold pour at the Sabodala-Massawa BIOX Expansion achieved only 24 months after construction launch, transforming the Sabodala-Massawa Complex into a tier 1 mine Commercial production at the BIOX Expansion project is expected in late Q2-2024, with the project ramping up to its nameplate capacity of 1.2Mtpa in Q3-2024 Over 3.5 million man hours have been completed with zero lost-time injuries Largest Group exploration programme planned at Sabodala-Massawa in 2024, with a spend of $21m, focussed on resource to reserve conversion and adding near mine refractory and non-refractory resources Following the on-schedule startup of the BIOX Expansion, the Group remains on track to achieve its full-year guidance of 1,130-1,270koz at an industry leading AISC of $955 – 1,035/oz

Dakar, 29 April 2024 – Endeavour Mining plc (LSE:EDV, TSX:EDV, OTCQX:EDVMF) (“Endeavour”, the “Group” or the “Company”) is pleased to announce that the first gold pour from the Sabodala-Massawa BIOX Expansion project (“BIOX Expansion”) in Senegal took place on 18 April 2024, marking the successful delivery of the BIOX Expansion project on schedule and on budget with no lost time injuries.

Ian Cockerill, CEO, commented “We are proud to have achieved our first gold pour at the Sabodala-Massawa BIOX Expansion with over 3.5 million man hours worked with no lost time injuries.

We have commissioned the project and delivered first gold in only 2 years, marking the fourth capital project that we have completed in the last 10 years. All of these have been completed in two years or less, and have been delivered on schedule, on budget and with no lost time injuries. This is a testament to the quality of our projects team and the competitive advantage we have in West Africa.

At the Sabodala-Massawa BIOX Expansion we expect to achieve nameplate capacity in Q3-2024 driving stronger production at lower all-in sustaining costs through the year, sustaining the Sabodala-Massawa complex’s industry leading cost profile.