A$3.12 million cash supports Altoro’s next Spanish exploration campaign

Funding extends exploration runway, not yet mine development

Altoro Metals Limited (ASX:ARO) has bought itself time to keep drilling in Spain, but not yet the money required to build a mine. The company ended September with A$3.12 million in cash after completing the second tranche of its A$5 million placement, giving it an estimated 3.47 quarters of funding at the quarter’s reported spending rate. That funding supports exploration; the much larger financing question remains the proposed restart of the San José mine.

The annual report for the year ended 30 June records a A$1.45 million loss, up from A$920,387 a year earlier. Cash at year end was only A$411,730, before the A$4.30 million placement proceeds arrived in July. The accounts state that Altoro may need further funds for exploration and overheads and warn that failure to raise or conserve capital could cast significant doubt over its ability to continue as a going concern.

Emilia results feed a larger Novales resource target

The operational case rests on a growing body of zinc exploration around the former San José and Udías mines in Cantabria. At Emilia, outside the current resource, channel sampling returned intervals including 2.65 metres at 21.10% zinc, 2.60 metres at 18.55% zinc and 2.90 metres at 13.30% zinc. The company is folding San José, Udías, Emilia and Margarita into a single proposed Novales Project, with a combined JORC Mineral Resource Estimate targeted for the March 2027 quarter.

“Location of the Novales-Udías Zinc Project”

“Plan view of historical underground drilling and face sampling results from the upper levels of the Emilia Mine (refer ASX Announcement dated 11 May 2026).”

Caption and image © Altoro Metals Limited. From “Annual Report to shareholders”, 30 Oct 2026.

Underground drilling and geological interpretation at Emilia indicated a structurally controlled mineralised system extending over more than 100 metres, although that figure describes the interpreted width of the system rather than an assayed mineralised thickness. The earlier Emilia system expansion reported by Altoro also noted that assays from nine holes were pending. Those results, along with outstanding Udías assays and the planned 20-hole surface campaign, will determine how much of the exploration story can move into a formal resource.

Resource remains unchanged while drilling tests extensions

For now, the headline resource has not moved: 3.379 million tonnes at 7.61% zinc and 0.88% lead as at 30 June. All of the company’s reported Udías drilling and the historical datasets added during the year sit outside that estimate, so the exploration upside has not yet translated into a larger JORC resource. Altoro has no Ore Reserves.

“Plan view of the southern part of the Udías Mine showing underground diamond drillholes, mine development and historical face samples (refer ASX Announcement dated 11 November…”

“Location of the 2026 diamond drillholes at the Guajaraz Project.”

Caption and image © Altoro Metals Limited. From “Annual Report to shareholders”, 30 Oct 2026.

The company also completed its first modern drilling campaign at the 100%-owned Guajaraz zinc-lead-silver-copper project in central Spain. Five holes produced 1,061.8 metres of effective core, which is now being logged and sampled before assay. Until those results arrive, Guajaraz remains a target-generation exercise rather than a defined economic discovery.

San José economics remain preliminary and capital intensive

Altoro’s March scoping study outlined an 11-year starter operation at San José, with a post-tax NPV of about A$67 million, a 45% internal rate of return and first concentrate targeted for 2028. The study requires approximately A$33 million in pre-production capital and draws partly on Inferred Mineral Resources. It is not sufficient to support Ore Reserves or provide assurance that the development case will be realised.

That gap between an encouraging study and a financeable mine is now the central tension in the story. Altoro is targeting submission of its Mine and Plant Project and Restoration Plan by the end of calendar 2026, while continuing to assess funding options including debt, royalties, streaming and offtake. The next meaningful test will be whether drilling and permitting can improve the project sufficiently to justify the substantial capital still required.