Mr. Gilbert Clark reports

MERIDIAN ANNOUNCES FTSE INDEX INCLUSION AND MOVES FROM SETSQX TO SETS

Due to Meridian Mining PLC's inclusion in the FTSE Index series, it will transition trading of the company's shares on the Main Market of the London Stock Exchange's SETSqx (Stock Exchange Electronic Trading Service: Quotes and Crosses) to SETS (Stock Exchange Electronic Trading Service), effective June 5, 2026, in preparation for the company's inclusion in the FTSE Small Cap Index expected to take place from June 22, 2026. The move will provide investors with access to the company's shares via SETS, providing liquidity via traditional order book trades, as well as from two-way quotes from market makers.

Meridian is a resource development and exploration company focused on gold-copper projects in Brazil and is headquartered in London, United Kingdom. The primary focus of the company is the development of the advanced stage Cabacal gold-copper project located in the state of Mato Grosso, Brazil. Within the wider Cabacal 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 and zinc-lead project, which is expected to be followed by regional scale exploration across the Cabacal belt, exploration at the Aguapei gold prospect and exploration in the Jauru and Araputanga greenstone belts.

Gilbert Clark, chief executive officer, comments: "The inclusion in the FTSE Index series is the first step in our index inclusion strategy and was a key rationale for our LSE Mainboard listing. We look forward to continuing to grow the company and will target inclusion in other indices alongside the advancement of the Cabacal project towards final investment decision and on to first production."

About Meridian Mining PLC

Meridian Mining is focused on:

• The development and exploration of the advanced-stage Cabacal VMS (volcanogenic massive sulphide) gold-copper project;
• Expanding the initial resource inventory in the Santa Helena area through extension of Santa Helena Central and new discoveries;
• Regional-scale exploration of the Cabacal VMS belt to expand the Cabacal Hub strategy;
• Exploration in the Jauru and Araputanga greenstone belts (the above all located in the state of Mato Grosso, Brazil).

The prefeasibility study technical report dated March 31, 2025, entitled: "Cabacal Gold-Copper Project NI 43-101 Technical Report and Pre-feasibility Study" outlines a base case after-tax NPV 5 (net present value, 5-per-cent discount rate) of $984-million (U.S.) and 61.2-per-cent IRR (internal rate of return) from a preproduction capital cost of $248-million (U.S.), leading to capital repayment in 17 months (assuming metals price scenario of $2,119 (U.S.) per ounce of gold, $4.16 (U.S.) per pound of copper and $26.89 (U.S.) per ounce of silver). Cabacal has a low all-in sustaining cost of $742 (U.S.) per ounce gold equivalent and an annual 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 Cabacal mineral reserve estimate consists of proven and probable reserves of 41.7 million tonnes at 0.63 gram per tonne gold, 0.44 per cent copper and 1.64 g/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+ and on the company's website.

The PFS technical report was prepared for the company by Tommaso Roberto Raponi (PEng), principal metallurgist with Ausenco Engineering Canada ULC; Scott Elfen (PE), global lead geotechnical and civil services with Ausenco Engineering Canada; John Anthony McCartney, CGeol, 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; PEng), of Flowsheets Metallurgical Consulting Inc.; and, Juliano Felix de Lima (engineer geologist, MAIG), of GE21 Consultoria Mineral.

We seek Safe Harbor.