Discovery of New Tin Zone at Mont Agoma

Rome Resources Plc (AIM: RMR), the DRC-focused tin and base metals explorer, is pleased to announce the discovery of a new tin zone on the eastern flank of the Mont Agoma prospect at its flagship Bisie North project in North Kivu Province, eastern DRC.

Highlights

• New tin zone intersected in hole MADD030: 40m interval in shallow weathered sequence.
• XRF on-site confirms significant tin mineralisation; assays pending.
• Sits outside existing soil anomaly and drilled area, suggesting a possible new system or fault-generated repetition.
• Potential for significant upside expansion along the eastern flank of Mont Agoma.
• Three rigs active; four holes drilled (737m) since 13 May, all encountering broad visual mineralisation.
• Maiden Resource Estimate (MRE) work underway.

Drill hole MADD030, located northeast of known mineralisation, intercepted a 40m wide tin-bearing zone at shallow depth. Although visual identification of cassiterite is limited in the weathered rock, initial Niton XRF readings confirms elevated tin levels, suggesting strong potential. Grades of tin mineralisation will be provided once laboratory results are reported.

Importantly, the mineralised intercept at MADD030 lies well outside both the current mineralised footprint and the tin-in-soil geochemical anomaly (Figure 1), potentially representing either a new tin system zone or a fault repetition of known mineralisation (Figure 2).

The newly drilled zone further suggests that there could be significant additional tin resource along the eastern flank of Mont Agoma.

Following the deepening of hole MADD030 (now MADD030A) to better understand the structural model, two follow-up drill holes will test the extension of this newly identified zone to the northwest.

To date, four holes totalling 737m have been completed since 13 May 2025 with three rigs currently drilling. All four holes have intersected visual tin, copper and zinc mineralisation and confirmed with the on-site Niton XRF analyser.

Broader zones of mineralisation are highlighted below, with no inference as to grade:

• MADD023: 50m Sn (38 - 88m), 8m Cu (105 - 113m), 31m Zn (57 - 88m)
• MADD025: 54m Sn (123 - 177m), 6m Cu (120 - 126m), 80m Zn (106 - 186m)
• MADD027: 57m Sn (61-118m), 71m Cu (67-138m), 57m Zn (67-124m)

Samples will be sent to ALS Global in South Africa with assay results expected before 31 July 2025.

Paul Barrett, Chief Executive Officer of Rome Resources Plc, commented:

"To date all the Mont Agoma drilling has focused on the main ridge where the geochemical anomaly is strongest. These initial indications from MADD030 open up the exciting scenario where tin mineralisation is present beyond the limits of our known footprint, potentially opening up the whole of the eastern flank of Mont Agoma. This is exactly the kind of upside we hoped to unlock with this new phase of drilling.

With three rigs turning, work in relation to our maiden mineral resource estimate underway and work due to start soon on the metallurgy of the deposit, Rome is building serious momentum on both the exploration and development fronts. We will continue sharing further updates in relation to drilling progress as well as assay results as they become available."

Figure 1 Map of Mont Agoma showing new tin zone identified in drillhole MADD030

Figure 2 Cross Section through Mont Agoma showing shallow tin zone in drillhole MADD030

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