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Endeavour Announces the Sale of Its Non-Core Boungou and Wahgnion Mines

Mergers & Acquisitions

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NEWS RELEASE – LSE & TSX: EDV

ENDEAVOUR ANNOUNCES THE SALE OF ITS NON-CORE

BOUNGOU AND WAHGNION MINES

London, 30 June 2023 – Endeavour Mining plc (LSE:EDV, TSX:EDV, OTCQX:EDVMF) (“Endeavour”, the “Group” or the

“Company”) is pleased to announce that it has today closed the sale of its 90% interests in its Boungou and Wahgnion

non-core mines in Burkina Faso (the “Agreement”) to Lilium Mining, a subsidiary of Lilium Capital , an African and

frontier markets focused strategic investment vehicle led by West African entrepreneurs. The total consideration is

expected to exceed $300 million and is comprised of upfront and deferred cash considerations and net smelter return

royalties (“NSR”), as detailed below.

Sébastien de Montessus, President and CEO, commented: “In line with our strategy of actively managing our portfolio

to focus management efforts on higher quality assets, we are pleased to announce the sale of our non-core Boungou

and Wahgnion mines to Lilium Mining.

We believe that Lilium Mining is well positioned to continue to unlock value at the Boungou and Wahgnion mines, for

the benefit of all stakeholders. Moreover, Lilium is a trusted Burkinabe-focused business that shares our commitment

to operate the mines in the best interests of employees and local stakeholders.

We wish to thank our Boungou and Wahgnion employees and local stakeholders for their commitment, professionalism

and contribution to Endeavour’s success over the past several years.”

TERMS OF THE AGREEMENT

Under the terms of the Agreement, the total consideration consists of the following:

› $130 million to be received by 31 July 2023 in the form of a reimbursement of historical shareholder loans, which

will be used to further strengthen the Company’s balance sheet as it progresses the construction of its growth

projects.

› $25 million in deferred cash consideration payable in two instalments of $10 million and $15 million by end of Q4-

2023 and end of Q1-2024, respectively.

› Deferred cash consideration comprised of 50% of the net free cashflow generated by the Boungou mine until $55

million has been paid, which is expected to occur by Q4-2024 based on the current gold price environment and

mine plan.

› An NSR on Boungou commencing immediately for 4.0% of gold sold. Endeavour expects the NSR on Boungou to

generate approximately $52 million of cash over its life of mine based on current reserves, assuming a gold price

of $1,850/oz, with further exploration upside and potential to convert resources to reserves.

› An NSR on Wahgnion commencing immediately for 4.0% of gold sold. Endeavour expects the NSR on Wahgnion

to generate approximately $ 41 million of cash over its life of mine based on current reserves , assuming a gold

price of $1,850/oz, with further exploration upside and potential to convert resources to reserves.

The transaction constitutes a class 2 transaction for Endeavour for the purposes of the UK Financial Conduct Authority’s

Listing Rules and, as such, does not require Endeavour shareholder approval. Based on the economic terms of the

transaction, Endeavour will perform its purchase price adjustments with effect from 1 May 2023.

UPDATED GROUP GUIDANCE

Following the sale of the Boungou and Wahgnion mines, Endeavour has updated its 2023 full year production and all-

in sustaining cost (“AISC”) guidance to account for the removal of guided production from the Boungou mine of 115 –

125koz at an AISC of $985 – 1,075/oz and from the Wahgnion mine of 150 – 165koz at an AISC of $1,250 – 1,350/oz. As

a result, the full year 2023 production guidance for continuing operations has decreased from 1,325 – 1,425koz to 1,060

– 1,135koz, while AISC guidance from continuing operations has improved by $45/oz to $895 – 950/oz. This asset sale

is expected to be more than offset by Endeavour’s ongoing construction activities as the Group’s production and AISC

are expected to significantly improve next year as the Sabodala -Massawa brownfield expansion in Senegal, and the

Lafigué greenfield project in Côte d’Ivoire remain on track to be commissioned in Q2-2024 and Q3-2024, respectively.

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ABOUT BOUNGOU MINE

The Boungou mine was acquired by Endeavour in July 2020, as part of its acquisition of SEMAFO. Endeavour owned a

90% stake in the Boungou mine, with the remaining 10% owned by the State of Burkina Faso.

Located approximately 323 km east -southeast of Ouagadougou, the capital of Burkina Faso, the Boungou mine is an

open pit operation on the highly prospective Birimian Greenstone Belt. Ore is treated at a 1.3Mtpa CIP processing plant

that achieved commercial production in September 2018. As at 31 December 2022, Proven and Probable reserves

totalled 8.9Mt at 2.91 g/t containing 0.83Moz of gold and Measured and Indicated resources (inclusive of reserves)

totalled 8.6Mt at 3.59 g/t containing 0.99Moz of gold. For the full year ended 31 December 2022, Boungou produced

116koz at an AISC of $1,064/oz, while for H1-2023 production is expected to amount to approximately 33koz at an AISC

of above $1,500/oz. For the full year ended 31 December 2022, Boungou generated $27.8 million in earnings from mine

operations. Boungou had a book value of $277.7 million comprised of $367.6 million in total assets and $89.9 million

in total liabilities, as at 31 March 2023, on a 100% basis.

ABOUT WAHGNION MINE

The Wahgnion mine was acquired by Endeavour in February 2021, as part of its acquisition of Teranga.

Endeavour owned a 90% stake in the Wahgnion mine, with the remaining 10% owned by the State of Burkina Faso.

Located approximately 510 km southwest of Ouagadougou, the capital of Burkina Faso, the Wahgnion mine consists of

several open pit operations on the highly prospective Birimian Greenstone Belt. Ore is treated at a 2.5Mtpa CIL plant

that achieved commercial production in November 2019. As at 31 December 2022, Proven and Probable reserves

totalled 14.0Mt at 1.59 g/t containing 0.72Moz of gold and Measured and Indicated resources (inclusive of reserves)

totalled 18.4Mt at 1.70 g/t containing 1.00Moz of gold. For the full year ended 31 December 2022, Wahgnion produced

124koz at an AISC of $1,525/oz, while for H1-2023 production is expected to amount to approximately 68koz at an AISC

of above $1,500/oz. For the full year ended 31 December 2022, Wahgnion generated an $18.3 million loss from mine

operations. Wahgnion had a book value of $322.3 million comprised of $401.8 million in total assets and $79.5 million

in total liabilities, as at 31 March 2023, on a 100% basis.

ADVISORS

Endeavour’s legal advisor for the transaction was Norton Rose Fulbright. BMO Capital Markets acted as financial advisor

for Lilium Mining.

QUALIFIED PERSONS

Mark Morcombe, COO of Endeavour Mining plc, a Fellow of the Australasian Institute of Mining and Metallurgy, is a

"Qualified Person" as defined by National Instrument 43 -101 - Standards of Disclosure for Mineral Projects ("NI 43 -

101") and has reviewed and approved the technical information in this news release.

CONTACT INFORMATION

Martino De Ciccio

Deputy CFO & Head of Investor Relations

+44 203 011 2723

[email protected]

Brunswick Group LLP in London

Carole Cable, Partner

+44 7974 982 458

[email protected]

ABOUT ENDEAVOUR MINING PLC

Endeavour Mining is one of the world’s senior gold producers and the largest in West Africa, with operating assets

across Senegal, Côte d’Ivoire and Burkina Faso and a strong portfolio of advanced development projects and exploration

assets in the highly prospective Birimian Greenstone Belt across West Africa.

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A member of the World Gold Council, Endeavour is committed to the principles of responsible mining and delivering

sustainable value to its employees, stakeholders and the communities where it operates. Endeavour is admitted to

listing and to trading on the London Stock Exchange and the Toronto Stock Exchange, under the symbol EDV.

For more information, please visit www.endeavourmining.com.

CAUTIONARY STATEMENT ON FORWARD-LOOKING INFORMATION

This document conta ins "forward -looking statements" within the meaning of applicable securities laws. All statements, other than

statements of historical fact, are “forward-looking statements”, including but not limited to, statements with respect to Endeavour's plans

and operating performance, the estimation of mineral reserves and resources, the timing and amount of estimated future production,

costs of future production, , the completion of studies, mine life and any potential extensions and, the future price of gold. Generally, these

forward-looking statements can be identified by the use of forward -looking terminology such as "expects", "expected", "budgeted",

"forecasts", "anticipates", believes”, “plan”, “target”, “opportunities”, “objective”, “assume”, “intention”, “go al”, “continue”, “estimate”,

“potential”, “strategy”, “future”, “aim”, “may”, “will”, “can”, “could”, “would” and similar expressions .

Forward-looking statements, while based on management's reasonable estimates, projections and assumptions at the date the statements

are made, are subject to risks and uncertainties that may cause actual results to be materially different from those expresse d or implied

by such forward-looking statements, including but not limited to: risks related to the successful integr ation of acquisitions or completion

of divestitures; risks related to international operations; risks related to general economic conditions and the impact of cr edit availability

on the timing of cash flows and the values of assets and liabilities based on projected future cash flows; Endeavour’s financial results, cash

flows and future prospects being consistent with Endeavour expectations in amounts sufficient to permit sustained dividend pa yments;

the completion of studies on the timelines currently expected, and the results of those studies being consistent with Endeavour’s current

expectations; actual results of current exploration activities; production and cost of sales forecasts for Endeavour meeting expectations;

unanticipated reclamation expenses; changes in project parameters as plans continue to be refined; fluctuations in prices of metals

including gold; fluctuations in foreign currency exchange rates; increases in market prices of mining consumables; possible v ariations in

ore reserves, grade or recovery rates; failure of plant, equipment or processes to operate as anticipated; extreme weather events, natural

disasters, supply disruptions, power disruptions, accidents, pit wall slides, labour disputes, title disputes, claims and lim itations on

insurance coverage and other risks of the mining industry; delays in the completion of development or construction activities; changes in

national and local government legislation, regulation of mining operations, tax rules and regulations and changes in the administration of

laws, policies and practices in the jurisdictions in which Endeavour operates; disputes, litigation, regulatory proceedings and audits; adverse

political and economic developments in countries in which Endeavour operates, including but n ot limited to acts of war, terrorism,

sabotage, civil disturbances, non -renewal of key licenses by government authorities, or the expropriation or nationalisation of any of

Endeavour’s property; risks associated with illegal and artisanal mining; environme ntal hazards; and risks associated with new diseases,

epidemics and pandemics, as well as those factors discussed in the section titled "Risk Factors" in the Company’s AIF available at

www.sedar.com. Although Endeavour has attempted to identify important factors that could cause actual results to differ materially from

those contained in forward -looking statements, there may be other factors that cause results not to be as anticipated, estimated or

intended. There can be no assurance that such statements wi ll prove to be accurate, as actual results and future events could differ

materially from those anticipated in such statements. Accordingly, readers are cautioned not to place undue reliance on forwa rd-looking

statements. Except as required under applicabl e securities legislation, Endeavour undertakes no obligation to publicly update or revise

forward-looking statements, whether as a result of new information, future events or otherwise.

INSIDE INFORMATION

This announcement contains inside information for the purposes of Article 7 of Regulation (EU) no 596/2014 (MAR) as

it forms part of UK Domestic Law by virtue of the European Union (Withdrawal) Act 2018. Upon the publication of this

announcement, this inside information is now considered to be in the public domain.