Boundiali Gold Project

Boundiali Gold Project, Côte d’Ivoire

Located in northern Côte d’Ivoire, the Boundiali Gold Project is a large-scale gold development project comprising multiple deposits across a highly prospective greenstone belt. Following the completion of the Pre-Feasibility Study, Aurum has commenced a Definitive Feasibility Study while continuing resource growth through an extensive drilling program.

In May 2026, Aurum updated the Boundiali JORC 2012 Mineral Resource Estimate to 3.22Moz gold, comprising 107.5Mt at 1.0 g/t Au. The Mineral Resource includes 1.70Moz in the Indicated category, representing a 24% increase of 330koz from the previous estimate.

In June 2026, Aurum delivered a Pre-Feasibility Study for Boundiali and declared a maiden Probable Ore Reserve of 42.1Mt at 0.9 g/t Au for 1.21Moz gold. The PFS confirmed a technically robust, large-scale, long-life open-pit gold development and provided the basis for Aurum to immediately commence a Definitive Feasibility Study.

Gold mineralisation remains open along strike and at depth across the Boundiali deposits and prospects. Aurum’s 100,000m owner-operated diamond drilling program is continuing in CY2026, with drilling focused on extending mineralisation and converting Inferred Resources to the Indicated category. A major Mineral Resource update is planned for Q3 CY2026 to support the DFS mine plan and an updated Ore Reserve.

Aurum has commenced the Boundiali Definitive Feasibility Study, with a Final Investment Decision targeted for late Q4 CY2026 and first gold production targeted for H1 CY2028. Mining Exploitation Licence applications have been lodged and are progressing for the relevant Boundiali tenements. Environmental compliance certificates for the BST, BD and BM tenements were issued in May 2026.

PFS Highlights

Maiden Probable Ore Reserve of 42.1Mt at 0.9 g/t Au for 1.21Moz gold
Proposed 6Mtpa open-pit mining and processing operation
Life-of-mine production of approximately 1.5Moz gold over 11 years
Average production of approximately 185,000oz per annum over the first five years
Year one production of approximately 201,000oz gold
Pre-production capital estimate of US$342 million
DFS underway
Final Investment Decision targeted for late Q4 CY2026
First gold targeted for H1 CY2028

Background

The Boundiali projects area covers the underexplored southern extension of the Boundiali belt where a highly deformed synclinal greenstone horizon traverses finer grained basin sediments and to the west Tarkwaian clastic rocks lie in contact with a granitic margin.

Table 1: Updated Boundiali Project JORC Mineral Resource Estimate (figures may not add up due to appropriate rounding)

As detailed in the accompanying Statement of Mineral Resources by Deposit based on drilling completed as at 30 April 2026, for BST1, BDT1, BDT2, BDT3, BMT1 and BMT3 deposits with 0.4 g/t Au cut off above 300m depth, and 1.5 g/t below 300m depth.

Total Mineral Resources of 3.22M ounces at 1.0 g/t Au using cut-off grades (COG) of 0.4 g/t Au above 300m depth and 1.5 g/t Au below 300m depth including: