MINERAL RESERVES AND MINERAL RESOURCES

ADVISORIES AND DETAILED NOTES ON MINERAL RESERVES AND RESOURCES

General 

Mineral Reserves and Mineral Resources are as of September 30, 2025 

The Mineral Reserves and Mineral Resources were classified using logic consistent with the CIM Definition Standards for Mineral Resources & Mineral Reserves (2014) incorporated, by reference, into National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”). Sample preparation, analytical techniques, laboratories used, and quality assurance and quality control protocols used during exploration drilling programs are done consistently with industry standards and independent certified assay labs are used.

Mineral Reserves are included in the Mineral Resources.

The Mineral Reserves and Mineral Resources are disclosed on a total project basis.

Measured and Indicated Mineral Resources which are not Mineral Reserves, do not have demonstrated economic viability. With respect to “Inferred Mineral Resources”, there is a great amount of uncertainty as to their existence and uncertainty as to their economic and legal feasibility. It cannot be assumed that all or any part of a “Measured Mineral Resource”, “Indicated Mineral Resource” or “Inferred Mineral Resource” will ever be upgraded to a higher category.

Qualified Persons

Simon Hille, FAusIMM, Executive Vice President, Operations and Technical Services, is the “qualified person” under NI 43-101 responsible for preparing and supervising the preparation of the scientific or technical information and verifying the technical data disclosed relating to our operating mines and development projects, unless otherwise noted. Additional qualified persons have approved disclosures for specific properties as detailed in “Mineral Reserve Notes” and “Mineral Resource Notes” below. Jessy Thelland, géo (OGQ No. 758), Director Technical Services Lamaque, a member in good standing of the Ordre des Géologues du Québec, is the qualified person as defined in NI 43-101 responsible for, and has verified and approved, the scientific and technical disclosure for the Quebec projects.

Mineral Reserve Notes

Eldorado reports Mineral Reserves in accordance with CIM Definition Standards. Mineral Reserves for the operating sites (Efemcukuru, Kisladag, Olympias, and within the Lamaque Complex – Ormaque, Triangle, Parallel and Plug #4) and the Skouries and Perama Hill projects were determined using a long-term gold price of $1,700/oz. A reserve test is undertaken every year to confirm future undiscounted cash flow from the reserve mine plan is positive.

Qualified Persons

The following persons, all of whom are qualified persons under NI 43-101, have approved the disclosure related to the Mineral Reserves for the projects noted below:

Mineral Resource Notes

Eldorado reports Mineral Resources in accordance with CIM Definition Standards. All Mineral Resources are assessed for reasonable prospects for eventual economic extraction (RPEEE). The Resource cut-off grades or values (e.g. gold equivalent) are determined using a long-term gold price ($2,100/oz) and modifying factors derived in the resource to reserve conversion process (or by comparison to similar projects for our resource-only properties). These values are then used to create constraining volumes that provide limits to the reported Resources. Resource grades are reported undiluted from within the constraining volumes that satisfy RPEEE. 

Open Pit Resources used pit shells created with the long-term gold price to constrain reportable model blocks. Underground Resources were constrained by volumes whose design was guided by a combination of the reporting cut-off grade or value, contiguous areas of mineralization and mineability. Eldorado’s Mineral Resources are inclusive of Reserves.

Mineral Resource Reporting and demonstration of Reasonable Prospects for Eventual Economic Extraction: 

The Mineral Resources used a long term look gold metal price of $2,100/oz for the determination of resource cut-off grades or values. This guided execution of the next step where constraining surfaces or volumes were created to control resource reporting Only material internal to these volumes were eligible for reporting. Projects with both open pit and underground Resources have the open pit Resources constrained by an open pit/underground economic crossover surface, and underground Resources constrained by a reporting shape.

Qualified Persons

The following persons, all of whom are qualified persons under NI 43-101, have approved the disclosure related to the Mineral Resources for the projects noted below: