Heliostar Restarts Mining Operations at San Agustin, Durango
Heliostar Delivers on San Agustin Restart, Eyes Mid-Tier Producer Status with Self-Funded Growth Strategy
On December 18, 2025, Heliostar Metals announced the recommencement of mining, crushing, conveying, and stacking of ore at its San Agustin mine in Durango, Mexico. This restart delivers on the company's previous guidance for a Q4 2025 restart.
The company expects to produce 45,000 ounces of gold from the current reserve at a high All-In Sustaining Cost (AISC) of US$1,990 per ounce. CEO Charles Funk noted that at a US$3,000 gold price, this operation is expected to generate US$40 million in cash flow.
Alongside the restart, Heliostar is undertaking a 10,000-15,000 metre drill program aimed at extending the mine life at San Agustin. The CEO stated this milestone positions the company for a significant increase in consolidated gold production in 2026 and allows it to continue funding its growth portfolio on a per-share basis.
This news is a material and positive catalyst, confirming management's ability to execute on its stated timeline. The restart of a second mining operation is a significant operational step that transitions the asset from a cost center to a cash-flow generator.
Reviewing the historical news flow provides crucial context: - Q1-Q2 2025: Transition and Fortification: Heliostar began the year by filing technical reports for its newly acquired Mexican assets (Jan 13), repaying its US$5M acquisition loan ahead of schedule (Feb 13), and completing a C$19.5M financing at C$1.00/share with participation from Eric Sprott (Mar 28). This quickly established the company as a debt-free producer with a strengthened balance sheet and institutional backing. - Q2-Q3 2025: Execution and Cash Flow: The company posted strong quarterly results, demonstrating positive cash flow from its La Colorada mine (Q1 results Apr 28, Q2 Sep 2, Q3 Nov 20). As of September 30, 2025, the company had a robust cash position of US$34.6 million, validating its strategy to internally fund near-term growth initiatives. - San Agustin Restart Plan: The plan to restart San Agustin was explicitly detailed on July 22, 2025, guiding for a Q4 restart to produce 45,000 ounces of gold. Today's announcement is the successful culmination of that plan. - Systematic De-risking: Throughout the year, Heliostar has systematically advanced its entire asset portfolio. It released a positive PEA for its flagship Ana Paula project (Nov 6), a positive PFS for Cerro del Gallo (Dec 11), and has received positive commentary on permitting for the La Colorada expansion (Dec 15).
Assessment: The restart of San Agustin is not a surprise, but it is a critical deliverable. The primary risk associated with this asset is its high AISC of US$1,990/oz, which leaves a thin margin at current gold prices and exposes the company to operational volatility or a drop in the gold price. However, management's strategy is to use the cash flow from San Agustin and La Colorada not as a primary value driver itself, but as a non-dilutive funding source for advancing its true company-maker, the high-grade, low-cost Ana Paula project (PEA AISC of US$1,011/oz).
This announcement solidifies Heliostar's status as a two-mine producer and reinforces the credibility of its "produce-and-grow" model. The market has rewarded this execution, with the stock appreciating significantly throughout the year. This news validates that appreciation and supports the current valuation.
Heliostar Metals is a gold producer and developer focused on its portfolio of assets in Mexico. After acquiring a suite of producing and development assets in late 2024, the company has rapidly transitioned into a producer with two operating open-pit, heap leach mines: La Colorada and San Agustin.
The company's flagship development project is Ana Paula, a high-grade, bulk-tonnage underground gold project in Guerrero, Mexico. The November 2025 PEA for Ana Paula highlighted its potential to be a low-cost operation (AISC US$1,011/oz) producing over 100,000 ounces per year. Heliostar's core strategy is to use the cash flow from its current operations to fund the advancement of Ana Paula toward a construction decision with minimal equity dilution.