Investor Presentation via Investor Meet Company

Meridian Mining plc

Investor Presentation via Investor Meet Company

LONDON, United Kingdom, 01 June 2026 / Meridian Mining plc (LSE: MNO), (TSX: MNO), (Frankfurt/Tradegate: N2E0), (OTCQX: MRRDF) is pleased to announce that Gilbert Clark, Chief Executive Officer, will host a live presentation and Q&A via the Investor Meet Company platform on Tuesday 2 June 2026, at 14:00 BST.

Meridian is a resource development and exploration company focused on gold-copper projects in Brazil and is headquartered in London, UK. The primary focus of the Company is the development of the advanced stage Cabaçal gold-copper project ("Cabaçal") located in the State of Mato Grosso, Brazil. Within the wider Cabaçal Belt, the Company is also developing a hub and spoke strategy. The next stage of this hub and spoke strategy is resource definition at the Company's high-grade Santa Helena Central Gold-Copper-Silver & Zinc-Lead project, which is expected to be followed by regional scale exploration across the Cabaçal Belt, exploration at the Aguapei gold prospect and exploration in the Jauru & Araputanga Greenstone belts.

The presentation is open to all existing and potential shareholders.

Investors can sign up to Investor Meet Company for free and watch the presentation via: https://www.investormeetcompany.com/meridian-mining-plc-2/register-investor

Investors who already follow Meridian Mining on the Investor Meet Company platform will automatically be invited.

 About Meridian

Meridian Mining is focused on:

• The development and exploration of the advanced-stage Cabaçal VMS gold‐copper project;

• Expanding the initial resource inventory at the Santa Helena area through extension of Santa Helena Central, and new discoveries;

• Regional-scale exploration of the Cabaçal VMS Belt to expand the Cabaçal Hub strategy; and

• Exploration in the Jauru & Araputanga Greenstone Belts (the above all located in the State of Mato Grosso, Brazil).

The Pre-feasibility Study technical report (the "PFS Technical Report") dated March 31, 2025, entitled: "Cabaçal Gold-Copper Project NI 43-101 Technical Report and Pre-feasibility Study" outlines a base case after-tax NPV5 of USD 984 million and 61.2% IRR from a pre-production capital cost of USD 248 million, leading to capital repayment in 17 months (assuming metals price scenario of USD 2,119 per ounce of gold, USD 4.16 per pound of copper, and USD 26.89 per ounce of silver). Cabaçal has a low All-in-Sustaining-Cost of USD 742 per ounce gold equivalent & production profile of 141,000 ounces of gold equivalent life of mine, driven by high metallurgical recovery, a low life-of-mine strip ratio of 2.3:1, and the low operating cost environment of Brazil.

The Cabaçal Mineral Reserve estimate in the PFS consists of Proven and Probable reserves of 41.7 million tonnes at 0.63g/t gold, 0.44% copper and 1.64g/t silver (at a 0.25 g/t gold equivalent cut-off grade).

Readers are encouraged to read the PFS Technical Report in its entirety. The PFS Technical Report may be found under the Company's profile on SEDAR+ at www.sedarplus.ca and on the Company's website at www.meridianmining.co

The PFS Technical Report was prepared for the Company by Tommaso Roberto Raponi (P. Eng), Principal Metallurgist with Ausenco Engineering Canada ULC; Scott Elfen (P. E.), Global Lead Geotechnical and Civil Services with Ausenco Engineering Canada ULC; John Anthony McCartney, C.Geol., Ausenco Chile Ltda.; Porfirio Cabaleiro Rodriguez (Engineer Geologist FAIG), of GE21 Consultoria Mineral; Leonardo Soares (BSc Geo, MAIG), Senior Geological Consultant of GE21 Consultoria Mineral; Norman Lotter (Mineral Processing Engineer; P.Eng.), of Flowsheets Metallurgical Consulting Inc.; and, Juliano Felix de Lima (Engineer Geologist MAIG), of GE21 Consultoria Mineral.

On behalf of the Board of Directors of Meridian Mining plc

Mr. Gilbert Clark - CEO and Director

Meridian Mining plc

8th Floor, 4 More London Riverside

London SE1 2AU

United Kingdom

Email: [email protected]

Ph: +44 (0) 203 930 3145 (GMT)

Media Enquiries:

Gareth Tredway / Saskia Sizen

Tel: +44 (0) 207 920 3150 

Email: [email protected]

Stay up to date by subscribing for news alerts here: https://meridianmining.co/contact/

Follow Meridian on X: https://X.com/MeridianMining

Further information can be found at: www.meridianmining.co