• Meridian announces Measured and Indicated (“M&I”) resources for Cabaçal as part of initial workstream towards its definitive feasibility study;
• Cabaçal mine’s Au-Cu-Ag open-pittable resource expanded;
  • M&I: 70.1Mt @ 0.6g/t Au, 0.3% Cu, 1.3g/t Ag;
  • Metal increases of 39.2% for Au, 14.2% for Cu and 19.3% for Ag;
  • Mineralization remains open down dip;
• Meridian reports M&I resources for the Santa Helena Central deposit;
• Santa Helena Central’s maiden open-pittable Au-Cu-Ag-Zn-Pb resource declared;
  • M&I: 5.3Mt @ 0.6g/t Au, 0.4% Cu, 15.5g/t Ag, 1.9% Zn & 0.4% Pb;
  • Resource remains open in all directions;
• The Cabaçal VMS Belt’s M&I resources total 4Moz Au, 0.6Blbs Cu, 5.6Moz Ag, 217.4Mlbs Zn and 49.9Mlbs Pb; and
• Cabaçal DFS metallurgical studies have optimised recoveries of Au, Cu & Ag.

Meridian Mining plc (TSX: MNO), (Frankfurt/Tradegate: N2E) (OTCQX: MRRDF) (“Meridian” or the “Company”) (- https://www.commodity-tv.com/play/meridian-mining-more-drilling-at-santa-helena-and-pre-feasibility-study-for-cabacal-coming-soon/ -) is pleased to announce the results of separate Mineral Resource Estimates (“MRE”) for the Cabaçal deposit and the Santa Helena Central deposit, concluded by its consultant, GE21 Consultoria Mineral. The Cabaçal Au-Cu-Ag project (“Cabaçal”) is at an advanced permitting stage[1] and is currently advancing to a Definitive Feasibility Study[2] (“DFS”), expected in Q4 2026. The completion of the updated resource is one of the initial workstreams to be completed for the DFS, and the updated resource will be used for further studies in connection with the DFS. The Company has not applied any economic analysis to the updated resource beyond that required to state a resource estimate and does not consider the updated resource to be material to Cabaçal or the Company. It does not supersede the results of the Company’s prefeasibility study (“PFS”) dated March 31, 2025 and the Mineral Reserve Estimate set out in the PFS is considered to remain current[3].

The Company is reporting an updated resource for Cabaçal. Cabaçal’s M&I resource is reported at 70.1Mt grading 0.6g/t Au, 0.3% Cu, 1.3g/t Ag for 1.3Moz of Au, 0.5Blbs of Cu and 3.0Moz of Ag.

Meridian is also reporting the maiden open-pittable resource for the Santa Helena Central Au-Cu-Ag-Zn-Pb project (“Santa Helena Central”). Santa Helena Central’s M&I resource is reported at 5.3Mt grading 0.6g/t Au, 0.4% Cu, 15.5g/t Ag, 1.9% Zn & 0.4% Pb for 95.8Koz of Au, 50.4Mlbs of Cu, 2.6Moz of Ag, 217.4Mlbs of Zn and 49.9Mlbs of Pb. The Company has not applied any economic analysis to the Santa Helena Central resource beyond that required to state a resource estimate and does not consider the resource to be material.

The Company is also reporting an increase in granted mineral rights across the Cabaçal, Jauru and Araputanga Greenstone Belts to Rio Cabaçal Mineraçao (“RCM”). This follows mineral applications being approved for exploration by the National Mining Agency – “Agência Nacional de Mineração” (“ANM”). The Company’s granted exploration portfolio has now more than doubled with these titles. Subject to access agreements and licensing, Meridian will initiate exploration activities across the Jauru and Araputanga Belts during 2026, while continuing to expand multiple exploration programs along the Cabaçal Belt.

In this press release, Cabaçal’s MRE is compared to that of March 2025[4]. The September 2025 MRE is based on CIBC Analyst Consensus Commodity prices of November 2025: Au USD 3,103/oz, Ag USD 35.34/oz & Cu USD 4.39 /lb to determine cut-off grades (see Note 14 associated with Table 1) as compared to March 2025’s MRE that used CIBC Analyst Consensus Commodity prices of November 2024: Au USD 2,119/oz, Ag USD 26.89/oz, Cu USD 4.16, refer to page 6, in the Company’s March 31, 2025 MD&A.

Mr. Gilbert Clark, CEO, comments: “A tremendous start to 2026 with Cabaçal’s resource update and Santa Helena Central’s maiden resource estimate. This confirms the tremendous potential of the Cabaçal Belt that now hosts over one point three million ounces of gold, more than half a billion pounds of copper and over five million ounces of silver all within open pit depths. Santa Helena Central’s resource is solely focused on the central part of an open and prospective system with its stand-alone PL application submitted. We can now look to further near-term growth from additional resource and exploration drilling knowing that we are already well on our way to developing these two resource hubs. The near-term development of a modern and sustainable mining operation in the state of Mato Grosso has been greatly advanced with Meridian’s growing Au-Cu-Ag resources, the advancement of the DFS and its expanding exploration programs.”

Further Informetion is attached.