HIGHLIGHTS:

• 83.2m grading 17.35 g/t gold from 76.0 m, including
  • 46.65 m grading 27.35 g/t gold from 88.95 m
• 70.7m grading 9.38 g/t gold from 49.65 m
• 92.1 m grading 4.33 g/t gold from 97.1 m
• 65.2 m grading 5.39 g/t gold from 152.2 m
• Ana Paula drill program to be extended to 20,000 metres of drilling

Heliostar Metals Ltd. (TSXV: HSTR,OTC:HSTXF) (OTCQX: HSTXF) (FSE: RGG1) (‘Heliostar’ or the ‘Company’) is pleased to announce additional results from the current drill program at its 100% owned Ana Paula project in Guerrero, Mexico. The program aims to convert inferred ounces to higher confidence classifications. It will also support the ongoing Feasibility Study and testing the next exploration targets around the Ana Paula deposit.

Heliostar CEO, Charles Funk, commented, ‘It’s rare to find a deposit that consistently produces 50-100m wide drill intercepts of these gold grades. Ana Paula is wide, high-grade, and shallow, with good underground mining conditions. These factors drive the low $1,011 all in sustaining cost in our new PEA for the project. It will also drive high margins at the project. The current program is focused on upgrading inferred ounces to higher confidence categories and the new data will be incorporated into a Feasibility Study. The lower costs drive a lower cut-off grade in the planned mine that opens the potential for more inferred material conversion. To maximize this opportunity, we will expand the program by 33% to 20,000 metres to allow for more infill and exploration drilling at Ana Paula. Across the Company, we have another study, a Prefeasibility Study for Cerro del Gallo, planned this quarter. We are also drilling at San Agustin and La Colorada. These programs should increase production and unlock the value we see in our deep growth portfolio.’

Drilling Program

Heliostar has completed 44 holes and 12,615 metres drilled to date. Drilling is designed along north-south sections with angled holes to better define the overall east-west orientation of the High Grade Panel. Heliostar’s drilling approach at Ana Paula has been to change the direction of drilling by approximately 90 degrees from the majority of historic intercepts. The Company believes that this change contributed to demonstrating more continuous and higher-grade gold mineralization within the High Grade Panel than recognized by previous operators.

Where appropriate, the holes are also being used to collect rock strength data, hydrogeologic data and samples for further metallurgical studies that will directly influence the Ana Paula mine design in the ongoing Feasibility Study.

Drill Results Summary

Holes AP-25-331, AP-25-333, AP-25-334 and AP-25-336 are resource conversion holes drilled in the central part of the High Grade Panel. Holes AP-25-334 and AP-25-336 were drilled on the same fence, with AP-25-334 targeting the polymictic breccia and hanging wall mineralization, and AP-25-336 targeting the polymictic breccia and footwall mineralization. Hole AP-25-334 intercepted a wide zone of 92.05 metres (‘m’) grading 4.33 grams per tonne (‘g/t’) gold, whilst AP-25-336 returned intervals of 3.2 m at 15.58 g/t gold, 65.15 m at 5.39 g/t and 43.55 m at 4.66 g/t gold with a 3.05 m interval with 24.64 g/t gold.

Figure 1: Plan Map of the current drill program at Ana Paula

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/7729/275661_ee215e99b48368f4_003full.jpg

Figure 2: Cross-Section through newly reported holes AP-25-334 and AP-25-336

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https://images.newsfilecorp.com/files/7729/275661_ee215e99b48368f4_004full.jpg

Hole AP-25-333 is located 60 m to the east of the above-mentioned fence and returned two high-grade intervals of 26.6 m grading 4.78 g/t gold and 83.2 m grading 17.35 g/t gold. Hole AP-25-331 is a step out 32 m to the southeast and returned a 7.95 m zone grading 7.92 g/t gold and a wide high-grade interval of 70.65 m at 9.38 g/t gold.

Holes AP-25-330, AP-25-332 and AP-25-335A are geotechnical holes for mine development planning and returned assay results in line with expectations, including intervals of 48.5 m of 5.48 g/t gold, 5.2 m of 4.23 g/t gold and 35.55 m of 6.73 g/t gold, respectively.

True widths are unknown. Mineralization at Ana Paula occurs as disseminations or vein stockworks with variable controls including rock porosity, lithology and fault networks.

Drilling continues throughout the High Grade Panel and its less well-defined east and west edges, with assays pending from twelve holes. Two of the drills have begun to target deeper inferred mineralization and the northern exploration zone, which is approximately 250 m north of the High Grade Panel that has two drill holes pending assay.

The next Ana Paula drill results are anticipated to be released in December.

Drilling Results and Coordinates Tables

Table 1: Significant Drill Intersections

¹ Result reported in November 20^th Q3, 2025 quarterly news release
² Top cut to 47 ppm Au based on resource model domains
³ Top cut to 64 ppm Au based on resource model domains
⁴ Top cut to 38 ppm Au based on resource model domains

Drilling Coordinates Table

Table 2:  Drill Hole Details

Ana Paula Preliminary Economic Assessment Note

Heliostar announced the results of a Preliminary Economic Assessment on November 6, 2025. References to the results in this release are provided in greater detail here.

Quality Assurance / Quality Control

Drill core is PQ size, and the core is cut in half, with half sent for analysis. Core samples were shipped to ALS Limited in Zacatecas, Zacatecas, Mexico, for sample preparation and for analysis at the ALS laboratory in North Vancouver. The Zacatecas and North Vancouver ALS facilities are ISO/IEC 17025 certified. Gold was assayed by 30-gram fire assay with atomic absorption spectroscopy finish, and overlimits were analyzed by 30-gram fire assay with gravimetric finish.

Control samples comprising certified reference and blank samples were systematically inserted into the sample stream and analyzed as part of the Company’s quality assurance / quality control protocol.

Statement of Qualified Person

Stewart Harris, P.Geo., a Qualified Person, as such term is defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects, has reviewed the scientific and technical information that forms the basis for this news release and has approved the disclosure herein. Mr. Harris is employed as Exploration Manager of the Company.

About Heliostar Metals Ltd.

Heliostar is a gold mining company with production from operating mines in Mexico. This includes the La Colorada Mine in Sonora and the San Agustin Mine in Durango. The Company also has a strong portfolio of development projects in Mexico and the USA. These include the Ana Paula project in Guerrero, the Cerro del Gallo project in Guanajuato, the San Antonio project in Baja Sur and the Unga project in Alaska, USA.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Cautionary Statement Regarding Forward-Looking Information

This news release includes certain ‘Forward-Looking Statements’ within the meaning of the United States Private Securities Litigation Reform Act of 1995 and ‘forward-looking information’ under applicable Canadian securities laws. When used in this news release, the words ‘anticipate’, ‘believe’, ‘estimate’, ‘expect’, ‘target’, ‘plan’, ‘forecast’, ‘may’, ‘would’, ‘could’, ‘schedule’ and similar words or expressions, identify forward-looking statements or information. These forward-looking statements or information relate to, among other things, show the full extent of the deposit, upgrade and expand the resource base, growing our annual production profile in the near term and bringing additional production online.

Forward-looking statements and forward-looking information relating to the terms and completion of the Facility, any future mineral production, liquidity, and future exploration plans are based on management’s reasonable assumptions, estimates, expectations, analyses and opinions, which are based on management’s experience and perception of trends, current conditions and expected developments, and other factors that management believes are relevant and reasonable in the circumstances, but which may prove to be incorrect. Assumptions have been made regarding, among other things, the receipt of necessary approvals, price of metals; no escalation in the severity of public health crises or ongoing military conflicts; costs of exploration and development; the estimated costs of development of exploration projects; and the Company’s ability to operate in a safe and effective manner and its ability to obtain financing on reasonable terms.

These statements reflect the Company’s respective current views with respect to future events and are necessarily based upon a number of other assumptions and estimates that, while considered reasonable by management, are inherently subject to significant business, economic, competitive, political, and social uncertainties and contingencies. Many factors, both known and unknown, could cause actual results, performance, or achievements to be materially different from the results, performance or achievements that are or may be expressed or implied by such forward-looking statements or forward-looking information and the Company has made assumptions and estimates based on or related to many of these factors. Such factors include, without limitation: precious metals price volatility; risks associated with the conduct of the Company’s mining activities in foreign jurisdictions; regulatory, consent or permitting delays; risks relating to reliance on the Company’s management team and outside contractors; risks regarding exploration and mining activities; the Company’s inability to obtain insurance to cover all risks, on a commercially reasonable basis or at all; currency fluctuations; risks regarding the failure to generate sufficient cash flow from operations; risks relating to project financing and equity issuances; risks and unknowns inherent in all mining projects, including the inaccuracy of reserves and resources, metallurgical recoveries and capital and operating costs of such projects; contests over title to properties, particularly title to undeveloped properties; laws and regulations governing the environment, health and safety; the ability of the communities in which the Company operates to manage and cope with the implications of public health crises; the economic and financial implications of public health crises, ongoing military conflicts and general economic factors to the Company; operating or technical difficulties in connection with mining or development activities; employee relations, labour unrest or unavailability; the Company’s interactions with surrounding communities; the Company’s ability to successfully integrate acquired assets; the speculative nature of exploration and development, including the risks of diminishing quantities or grades of reserves; stock market volatility; conflicts of interest among certain directors and officers; lack of liquidity for shareholders of the Company; litigation risk; and the factors identified under the caption ‘Risk Factors’ in the Company’s public disclosure documents. Readers are cautioned against attributing undue certainty to forward-looking statements or forward-looking information. Although the Company has attempted to identify important factors that could cause actual results to differ materially, there may be other factors that cause results not to be anticipated, estimated or intended. The Company does not intend, and does not assume any obligation, to update these forward-looking statements or forward-looking information to reflect changes in assumptions or changes in circumstances or any other events affecting such statements or information, other than as required by applicable law.

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/275661

Q3 2025 Quarter Highlights

• Record Q3 2025 production of 9,165 Gold Equivalent Ounces (GEOs)
• Q3 2025 sales of 7,709 GEOs
• Q3 Operating income of US$14.2M; Net Income of US$1.3M after US$6.4M of Exploration costs
• Consolidated cash costs of $1,500 per GEO sold and consolidated all-in sustaining costs (‘AISC’) of $1,825 for Q3 2025
• US$34.6M in cash, 1,688 unsold gold ounces, working capital of US$46.7M and no debt
• The Company is on track to achieve its annual production guidance of 31,000 to 41,000 GEOs, annual cash cost of $1,800-1,900 per GEO sold and AISC of $1,950-2,100 per GEO sold for 2025

Heliostar Metals Ltd. (TSXV: HSTR,OTC:HSTXF) (OTCQX: HSTXF) (FSE: RGG1) (‘Heliostar’ or the ‘Company’) today reported unaudited financial results for the three months ended September 30, 2025 (‘Q3 2025’), which corresponds to the second quarter of Heliostar’s fiscal reporting year 2025. Results are presented in US dollars, unless stated.

Heliostar CEO, Charles Funk, commented, ‘In Q3, Heliostar continued to generate strong cash flow from our operating mines. We grew production and strengthened our capital position while significantly reinvesting across the portfolio. In Q3, this included significant drill programs at Ana Paula and La Colorada, economic studies for La Colorada and Ana Paula as well as permissions and preparations to restart mining at San Agustin. Our strong cash balance has allowed us to internally fund this restart. This gives us a clear path to generate cash flow from operations which will fund the ongoing development of Ana Paula with little-to-no equity dilution.’

‘Our recently released PEA for Ana Paula shows that the additional 101,000 ounces per year of production at an all-in sustaining cost of just $1,011/oz will be a significant cash flow generator for Heliostar, supporting growth through the next decade. The cash generated by being a producer in the current gold price environment affords us opportunities to accelerate our plan to become a mid-tier producer with 500,000 ounces per year before the end of the decade.’

Third Quarter 2025 Quarterly Conference Call

Heliostar will host a quarterly conference call on Monday, November 24, 2025, at 2:00 PM, Eastern Time/11:00 AM Pacific Time. The call will provide a corporate update following the release of our financial and operating results for the third quarter of 2025.

Please use the link here to register for the call or visit the Company website at www.heliostarmetals.com.

Q3 2025 Operational and Financial Highlights

Total gold production of 9,165 gold equivalent ounces (‘GEO’) (8,949 gold ounces) in Q3 2025. Gold production was realized from mining the Junkyard Stockpile at the La Colorada mine, as well as re-leaching the previously stacked ore at the La Colorada and the San Agustin mines. Production year-to-date January – September 2025 (‘YTD’) remains on track to achieve the lower half of the 2025 guidance issued by the Company on February 4, 2025, of 31,000-41,000 GEOs.

Total Cash Cost of $1,500 per GEO produced in Q3 2025. The combined YTD cash cost (see ‘Non-IFRS Measures’) is $1,405 per GEO.

Total AISC of $1,825 per GEO sold in Q3 2025. The increase from Q2 reflects a change in calculation methodology to include corporate General and Administrative (‘G&A’) and stock based compensation costs, expensed exploration incurred in the period, and remove previously-included by-product credits. The higher AISC is also a function of fewer GEOs sold in the period compared to Q2 2025. The consolidated YTD AISC (see ‘Non-IFRS Measures) is $1,799 per GEO sold.

Total Cash Costs and AISC are below the 2025 guidance range due to higher production relative to the budget. The Company anticipates materially higher costs in Q4 due to one-off sustainable capital investment incurred to restart mining from the Corner Area. These expenses are anticipated to return to lower rates in early 2026 at San Agustin.

Mine Operating Earnings of $14.2 million in Q3 2025. The Company continued to report strong results in Q3 2025 with steady operating unit costs and operating margin benefiting from selling into a rising gold market. Mine operating earnings YTD 2025 are $40 million.

Net income attributable to shareholders of $1.3 million, or $0.01 per share, for Q3 2025. Net income of $1.3 million ($0.01 per share) for Q3 2025 compared to a net income attributable to shareholders of $1.9 million ($0.01 per share) for Q2 2025. This was due to the increased exploration expense as drilling activities at Ana Paula ramped up and lower GEO sales volume in the quarter.

Strengthened financial position and liquidity: On September 30, 2025, the Company had cash of $34.6 million and working capital (defined as current assets less current liabilities) of $46.7 million. The cash position decreased compared to Q2 due to the increase in exploration spending. As of September 30, 2025, the Company had 1,688 unsold ounces (worth approx. $6.9M at current spot gold prices) and no debt.

Maintained stable production at La Colorada mine. The mining of new ore restarted at the Junkyard Stockpile in January 2025. Production from the Junkyard Stockpile was steady during Q3 2025, with operating costs as expected, grade in line with the reserve model and ore tonnes reconciling slightly higher than expected. Production YTD 2025 was 13,328 GEOs (12,883 gold ounces). Ore feed from the Junkyard Stockpile is planned to continue into 2026, with other historical stockpiles identified to provide additional material to be crushed and stacked on the leach pad thereafter. Further, subject to receiving certain land access approvals, the Company intends to expand the Veta Madre pit to exploit its 43k ounces of gold reserves. In addition, drilling is ongoing at Veta Madre Plus with the aim of adding this additional Indicated material into a near-term mine plan in short order.

Restart of mining at San Agustin. Preparation work to commence mining is underway at San Agustin from the Corner area following the receipt of all necessary approvals to restart mining in Q3. The Company anticipates stacking first ore in December with production from the Corner starting near year end and continuing into 2027. Recoverable reserves at the Corner are estimated at 44.5k ounces of gold.

Strong economics and continued drilling success at Ana Paula drive additional investment. On November 6, 2025, the Company announced the results of a Preliminary Economic Study (PEA) for Ana Paula. These showed attractive economics at a conservative gold price driven by production of 101koz/yr after ramp up at an average all-in sustaining cost of $1,011/oz. On the back of this positive outcome, the Company has announced its intention to complete the underground decline access to the deposit in 2026. Technical and regulatory programs are being advanced in parallel and will continue through 2026 to complete a bankable feasibility study in early 2027.

Preparation of updated technical reports. The Company announced the results of an updated technical report for the La Colorada Mine on October 17, 2025, and is concluding an updated prefeasibility study (‘PFS’) for the Cerro del Gallo Project. The Company plans to release the results of the Cerro del Gallo PFS in Q4 2025 and continues to advance the Ana Paula Project feasibility study.

Operational and Financial Results

Results are reported for the three months ended September 30, 2025, which corresponds to the second quarter of Heliostar’s fiscal reporting year 2026.

A summary of the Company’s consolidated operational and financial results for the reporting period is presented below:

1. Non-IFRS measure. Refer to the ‘Non-IFRS Measures’ section of this news release.

Operational Review

Consolidated Production and Costs

Q3 2025 was the Company’s fourth reporting period with metals production. The Company had no production in Q3 2024.

Production of 9,165 GEOs (8,949 gold ounces) for Q3 2025 was reported from the La Colorada mine and the San Agustin mine. In late Q2, the El Castillo mine ceased production and reclamation commenced at the start of Q3. The combined YTD 2025 production of 25,642 GEOs (24,988 gold ounces) is consistent with the 2025 guidance issued by the Company. Heliostar is on track to achieve the lower half of the 2025 production guidance of 31,000-41,000 GEOs with the several week delay in being able to restart San Agustin pushing production from that asset into 2026.

The combined cash costs for the producing operations were $1,500 per GEO sold, and the consolidated AISC was $1,825 per GEO sold. The combined cash costs and AISC are currently in line with the 2025 guidance issued by the Company. Full-year results are expected to be within the guidance range of $1,800-$1,950/GEO for Cash Costs and $1,950-$2,100/GEO for AISC.

La Colorada Mine

Operating results for Q3 2025 were as follows:

In January 2025, mining of new ore restarted at the Junkyard Stockpile by the Company, alongside re-leach activities of ore stacked by previous operators.

During the reporting period, the La Colorada mine produced 5,479 GEOs (5,311 gold ounces). Total revenues of $14.7 million were reported from sales of 4,229 GEOs. The increase in production compared to Q2 was driven by higher grades placed on the leach pad and the first full quarter of solution flow from the leach pad after restart of operations. Production from the leach pad has increased steadily throughout the year and continues to meet all expected parameters.

For the reporting period, cash costs were $1,592 per GEO ($1,354 per GEO YTD 2025). AISC was $1,648 per GEO ($1,439 per GEO YTD 2025), on track to be at the lower end or below 2025 AISC guidance of $1,850-$1,975/GEO.

The Company plans to continue mining of the Junkyard Stockpile through 2025 and into 2026, with other historical stockpiles identified to provide additional, continued feed to the crushers thereafter. Further, subject to receiving certain land access approvals, the Company intends to expand the Veta Madre pit to exploit 43k ounces of gold reserve, which will be timed sequentially with the ore feeds from the historical stockpiles. Drilling is ongoing to define the mineralization at Veta Madre Plus, with the aim of bringing it into the near-term mine plan in short order.

Subsequent to the reporting period, Heliostar released the results of an updated technical report for La Colorada showing and increased resource and a lower capital expenditure. This showed a mine with a six-year life producing 286k gold ounces at an AISC of $1,626 per GEO. This resulted in upside case economics of an NPV5% of $243.3M and an IRR of 168.4% at a $3,500/oz gold price. For more details, see the press release here.

San Agustin Mine

Operating results for Q3 2025 were as follows:

In September 2024, the previous owners of San Agustin placed the mine under care and maintenance, with metals production continuing from the re-leaching of leach pads.

During the reporting period, the San Agustin mine produced 3,686 GEOs (3,638 gold ounces). Total revenues of $12.1 million were reported from sales of 3,480 GEOs. Re-leaching performance continued well above expectations in the quarter as a result of enhanced recovery initiatives conducted earlier in the year. Gold production through the first nine months of the year exceeded full-year 2025 guidance for re-leaching from the mine.

For the reporting period, cash costs were $1,389 per GEO ($1,437 per GEO YTD 2025). AISC was $1,587 per GEO ($1,546 per GEO YTD 2025), YTD on track to achieve full year AISC guidance of $1,700-$1,850/GEO.

During the quarter, the Company completed all regulatory requirements to enable the restart of mining at San Agustin from the Corner area (see News Release dated July 22, 2025). Work to commence mining of the Corner Area cut back was undertaken subsequently, including moving road access, a power line and contractor selection. First ore is on track to be stacked on the leach pad in the coming weeks. Initial gold production from this new material is expected to start near year end 2025 and continue into 2027. Recoverable reserves at the Corner are estimated at 44.5k ounces of gold.

Ana Paula Project

Development and Exploration expenditures at the flagship Ana Paula Project were $3.9 million in Q3 2025 ($1.8 million in Q3 2024).

During Q3 2025, the Company progressed its ongoing 15,000 metre drilling program at Ana Paula with the objective of delivering mineral reserves to support a 10-year life of mine in the Feasibility Study planned to be released in 1H 2027. On October 6, 2025, the Company announced results from the infill drill program (including 88.1m metres at 8.82 g/t) and the addition of a third rig. Subsequent to quarter end on November 18, 2025, the Company announced additional infill results of 83.2m of 17.4 g/t and 70.7m of 9.38 g/t. The drill program continues to successfully define wide zones of high grade mineralization.

Subsequent to the reporting period, Heliostar released the results of a Preliminary Economic Study (PEA) for Ana Paula showing strong economics at a conservative gold price. This showed a mine with a nine year life producing 101koz/yr after ramp up at an AISC of $1,011/oz. This resulted in upside case economics of an NPV5% of $1,012M, an IRR of 51.3% and average annual after-tax free cash flow of $168M at a $3,800/oz gold price. For more details, see the press release here.

Cerro del Gallo Project

During Q3 2025, the Company conducted advanced study work towards releasing a prefeasibility study for the Cerro del Gallo project based on information collected by previous owners. This work includes updated resources and reserves based on an updated gold price as well as better definition of transition material and an optimized mining and stacking plan. The results of this study are planned to be released in the coming weeks. All major environmental and other permits will need to be obtained before an investment decision can be considered by the Company.

Funding Overview

In the three months ended September 30, 2025, 5,916,250 warrants and 766,250 stock options were exercised for total proceeds of $1.5 million and 1,299,579 RSUs were converted.

As of September 30, 2025, the Company had no debt.

Change of Year End

The Company has changed its financial year-end from March 31 of each year to December 31 of each year. The next financial year-end of the Company will occur on December 31, 2025, for the nine months then ended.

Non-IFRS Measures. This news release refers to certain financial measures, such as all-in-sustaining costs, which are not measures recognized under IFRS and do not have a standardized meaning prescribed by IFRS. These measures may differ from those made by other companies and, accordingly, may not be comparable to such measures as reported by other companies. These measures have been derived from the Company’s financial statements because the Company believes that they are of assistance in understanding the results of operations and its financial position. Certain additional disclosures for these specified financial measures have been incorporated by reference and can be found in the Company’s MD&A for Q3 2025, available on SEDAR+.

Cash costs. The Company uses cash costs per gold equivalent ounce sold to monitor its operating performance internally. The most directly comparable measure prepared in accordance with IFRS is cost of sales. The Company believes this measure provides investors and analysts with useful information about its underlying cash costs of operations. The Company also believes it is a relevant metric used to understand its operating profitability and ability to generate cash flow. Cash costs are measures developed by metals companies in an effort to provide a comparable standard; however, there can be no assurance that the Company’s reporting of these non-GAAP financial measures are similar to those reported by other mining companies. They are widely reported in the metals mining industry as a benchmark for performance, but do not have a standardized meaning and are disclosed in addition to IFRS measures. Cash costs include production costs, refinery and transportation costs and extraordinary mining duty. Cash costs exclude non-cash depreciation and depletion and site share-based compensation. Production costs include mining, crushing, processing, and direct overhead at the operation sites.

AISC. AISC more fully defines the total costs associated with producing precious metals. The AISC is calculated based on guidelines published by the World Gold Council (WGC), which were first issued in 2013. In light of new accounting standards and to support further consistency of application, the WGC published an updated Guidance Note in 2018. Other companies may calculate this measure differently because of differences in underlying principles and policies applied. Differences may also arise due to a different definition of sustaining versus growth capital. Note that in respect of AISC metrics within the technical reports, because such economics are disclosed at the project level, corporate general and administrative expenses were not included in the AISC calculations. AISC per GEO includes mining, processing, direct overhead, reclamation and sustaining capital.

Statement of Qualified Persons

Gregg Bush, P.Eng., Mike Gingles, and Stewart Harris, P. Geo., Qualified Persons, as such term is defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects, have reviewed the scientific and technical information that forms the basis for this news release and have approved the disclosure herein. Mr. Bush is employed as Chief Operating Officer of the Company, Mr. Gingles is employed as Vice President of Corporate Development, and Mr. Harris is employed as Exploration Manager.

About Heliostar Metals Ltd.

Heliostar aims to grow to become a mid-tier gold producer. The Company is focused on increasing production and developing new resources at the La Colorada and San Agustin mines in Mexico, and on developing the 100% owned Ana Paula Project in Guerrero, Mexico.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Cautionary Statement Regarding Forward-Looking Information
This news release includes certain ‘Forward-Looking Statements’ within the meaning of the United States Private Securities Litigation Reform Act of 1995 and ‘forward-looking information’ under applicable Canadian securities laws. When used in this news release, the words ‘anticipate’, ‘believe’, ‘estimate’, ‘expect’, ‘target’, ‘plan’, ‘forecast’, ‘may’, ‘would’, ‘could’, ‘schedule’ and similar words or expressions, identify forward-looking statements or information. These forward-looking statements or information relate to, among other things: the Company’s goal of becoming a mid-tier producer, the mine performance, production plans and the free cashflow generation from our operating mines, all profits generated from operations to be reinvested directly into our Companies growth and this reinvestment will focus on expanding production and growing resources across our portfolio.

Forward-looking statements and forward-looking information relating to the terms and completion of the Facility, any future mineral production, liquidity, and future exploration plans are based on management’s reasonable assumptions, estimates, expectations, analyses and opinions, which are based on management’s experience and perception of trends, current conditions and expected developments, and other factors that management believes are relevant and reasonable in the circumstances, but which may prove to be incorrect. Assumptions have been made regarding, among other things, the receipt of necessary approvals, price of metals; no escalation in the severity of public health crises or ongoing military conflicts; costs of exploration and development; the estimated costs of development of exploration projects; and the Company’s ability to operate in a safe and effective manner and its ability to obtain financing on reasonable terms.

These statements reflect the Company’s respective current views with respect to future events and are necessarily based upon a number of other assumptions and estimates that, while considered reasonable by management, are inherently subject to significant business, economic, competitive, political and social uncertainties and contingencies. Many factors, both known and unknown, could cause actual results, performance, or achievements to be materially different from the results, performance or achievements that are or may be expressed or implied by such forward-looking statements or forward-looking information and the Company has made assumptions and estimates based on or related to many of these factors. Such factors include, without limitation: precious metals price volatility; risks associated with the conduct of the Company’s mining activities in foreign jurisdictions; regulatory, consent or permitting delays; risks relating to reliance on the Company’s management team and outside contractors; risks regarding exploration and mining activities; the Company’s inability to obtain insurance to cover all risks, on a commercially reasonable basis or at all; currency fluctuations; risks regarding the failure to generate sufficient cash flow from operations; risks relating to project financing and equity issuances; risks and unknowns inherent in all mining projects, including the inaccuracy of reserves and resources, metallurgical recoveries and capital and operating costs of such projects; contests over title to properties, particularly title to undeveloped properties; laws and regulations governing the environment, health and safety; the ability of the communities in which the Company operates to manage and cope with the implications of public health crises; the economic and financial implications of public health crises, ongoing military conflicts and general economic factors to the Company; operating or technical difficulties in connection with mining or development activities; employee relations, labour unrest or unavailability; the Company’s interactions with surrounding communities; the Company’s ability to successfully integrate acquired assets; the speculative nature of exploration and development, including the risks of diminishing quantities or grades of reserves; stock market volatility; conflicts of interest among certain directors and officers; lack of liquidity for shareholders of the Company; litigation risk; and the factors identified under the caption ‘Risk Factors’ in the Company’s public disclosure documents. Readers are cautioned against attributing undue certainty to forward-looking statements or forward-looking information. Although the Company has attempted to identify important factors that could cause actual results to differ materially, there may be other factors that cause results not to be anticipated, estimated or intended. The Company does not intend, and does not assume any obligation, to update these forward-looking statements or forward-looking information to reflect changes in assumptions or changes in circumstances or any other events affecting such statements or information, other than as required by applicable law.

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/275395

(TheNewswire)

Vancouver, British Columbia, November 19, 2025 TheNewswire – Prismo Metals Inc. (the ‘ Company ‘) (CSE: PRIZ,OTC:PMOMF) (OTCQB: PMOMF) is pleased to report that it has completed a detailed exploration program at the Black Diamond area of its Silver King Project located in Arizona. Work consisted of mapping and sampling of the area including the Black Diamond copper replacement body and the newly encountered strongly altered felsic intrusion with stockwork veining.  A handheld XRF analyzer was used to complete a soil geochemistry grid and to analyze selected rock samples in a qualitative manner. Additionally, an IP survey was recently initiated over the Silver King land package, with results expected by the first week of December.

Figure 1 .  Map showing the location of the Black Diamond replacement and felsic intrusion exploration targets at the Silver King project.  Claim boundaries are shown in yellow.

The soil survey defined a large copper anomaly over the Black Diamond replacement body along with some anomalous gold values. Previous rock samples have shown the copper-gold association of mineralization in replacement mineralization. The soil survey also showed Zn, Pb, Ag and Sb anomalies associated with the felsic intrusion. This intrusion is strongly sericitized and is cut by moderate to strong stockwork quartz veins with locally abundant iron oxides after pyrite.

XRF analysis of rock samples in the area was also completed. Although XRF analyses on rocks are generally qualitative and are not valid assays as are rock samples assayed by the geochemical laboratories, they do indicate the presence of the metals of interest and are useful as guides to mineralization.

XRF analyses of individual quartz veinlets in the stockwork hosted by the felsic intrusion locally indicate the presence of silver, lead and zinc as well as some antimony.  During the exploration program, Prismo’s geological team took 34 rock chip samples over the area. These samples were submitted to the laboratory with assay results expected in the coming weeks.

Craig Gibson, Chief Exploration Officer of the Company, stated: ‘These results confirm Black Diamond as a copper-gold replacement body target as was indicated from previous work, making this area a compelling drill target. The data collected from the felsic intrusion indicated that it is mineralized, a feature that was not indicated in reports from previous work by Fischer Watt in 1980, although they considered it a prime target based on alteration mineralogy and fluid inclusion studies 1 .’

Drill Permit Update

Prismo also announced that the Forest Service, the federal surface land management entity for Silver King, has determined that the Company’s proposed drill plan meets the regulatory requirements for processing, and that such plan is complete, as described in the regulations at 36 CFR 228.4(c).

The Forest Service will now proceed with the environmental analysis pursuant to 36 CFR 228(a)(5) in conformity with the National Environmental Policy Act (NEPA). This analysis will proceed as a Categorical Exclusion, the lowest level of environment reviews applicable to projects that are not expected to have a significant effect on the environment, such as Silver King.

Alain Lambert, CEO of Prismo stated: ‘We are pleased with the steady progress on the permitting front, especially given the now resolved US government ‘shutdown.’

Mr. Lambert added: ‘With the closing of our recent oversubscribed financing, we are fully funded for the first two phases of drilling. In Phase 1, we plan a drill program at the historic Silver King mine site for about 1,000 meters. That drill plan is designed to test the upper half of the steeply dipping pipelike Silver King mineralized body as well as potential mineralization adjacent to the dense stockwork that was the focus of historic mining.’

Figure 2 . Cross section through the Silver King mine workings showing proposed drill holes (in black) to test the pipelike mineralized body (in red)

Given the Company’s recent discoveries, Prismo has added a second phase of drilling for an additional 1,000 meters. This additional program will focus on the newly identified targets outside of the historic mining area, such as the polymetallic vein and the copper vein mentioned above. Drilling of the large body of replacement mineralization on the patented Black Diamond claim is also being planned and is road accessible on private ground.

1 Haynes, F. and Reynolds, 1980, Silver King Breccia Pipe Prospect, unpublished report, Fischer-Watt Mining Co., 5p.

QA/QC

XRF analyses are considered to be qualitative in nature and cannot be considered to be representative of commercial assays.  XRF soil analyses are useful as they indicate variations in metal contents to represent anomalies, although the actual values of the metals present are not necessarily the same as those obtained from commercial geochemical analyses.  The company uses commercial standards when using the XRF analyzer.

Qualified Person

Dr. Craig Gibson, PhD., CPG., a Qualified Person as defined by NI-43-01 regulations and Chief Exploration Officer and a director of the Company, has reviewed and approved the technical disclosures in this news release.  The historic data presented in this press release was obtained from public sources, should be considered incomplete and is not qualified under NI 43-101, but is believed to be accurate. The Company has not verified the historical data presented and it cannot be relied upon, and it is being used solely to aid in exploration plans. References to mineralization at the Magma Mine and Resolution Copper deposit is not necessarily indicative to the mineralization on the Silver King property.

About the Silver King

Discovered in 1875, the Silver King mine was one of Arizona ‘ s most important historic producers, yielding nearly 6 million ounces of silver at grades of up to 61 oz/t.  The Silver King mine sits only 3 km from the main shaft of the Resolution Copper project — a joint venture between Rio Tinto and BHP and one of the world ‘ s largest unmined copper deposits with an estimated copper resource of 1.787 billion metric tonnes at an average grade of 1.5% copper (1) . The unique land position is fully surrounded by Resolution Copper ‘ s claim block, offering strategic upside. Selected samples from small-scale production in the late 1990s returned grades as high as 644 oz/t silver (18,250 g/t) and 0.53 oz/t gold (15 g/t), indicating that high-grade mineralization remains.

About Prismo Metals Inc.

Prismo (CSE: PRIZ,OTC:PMOMF) is a mining exploration company focused on advancing its Silver King, Ripsey and Hot Breccia projects in Arizona and its Palos Verdes silver project in Mexico.

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Prismo Metals Inc.

1100 – 1111 Melville St., Vancouver, British Columbia V6E 3V6

Phone: (416) 361-0737

Contact:

Alain Lambert, Chief Executive Officer alain.lambert@prismometals.com

Gordon Aldcorn, President gordon.aldcorn@prismometals.com

Cautionary Note Regarding Forward-Looking Information

This release includes certain statements and information that may constitute forward-looking information within the meaning of applicable Canadian securities laws. Forward-looking statements relate to future events or future performance and reflect the expectations or beliefs of management of the Company regarding future events. Generally, forward-looking statements and information can be identified by the use of forward-looking terminology such as ‘ intends’ or ‘ anticipates’, or variations of such words and phrases or statements that certain actions, events or results ‘ may’, ‘ could’, ‘ should’, ‘ would’ or ‘ occur’. This information and these statements, referred to herein as ‘forward‐looking statements’, are not historical facts, are made as of the date of this news release and include without limitation, statements regarding discussions of future plans, estimates and forecasts and statements as to management’s expectations and intentions with respect to, among other things: the timing, costs and results of drilling at Silver King.

These forward‐looking statements involve numerous risks and uncertainties, and actual results might differ materially from results suggested in any forward-looking statements. These risks and uncertainties include, among other things: delays in obtaining or failure to obtain appropriate funding to finance the exploration program at Silver King.

In making the forward-looking statements in this news release, the Company has applied several material assumptions, including without limitation, that: the ability to raise capital to fund the drilling campaign at Silver King and the timing of such drilling campaign.

Although management of the Company has attempted to identify important factors that could cause actual results to differ materially from those contained in forward-looking statements or forward-looking information, there may be other factors that cause results not to be as anticipated, estimated or intended. There can be no assurance that such statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements and forward-looking information. Readers are cautioned that reliance on such information may not be appropriate for other purposes. The Company does not undertake to update any forward-looking statement, forward-looking information or financial outlook that are incorporated by reference herein, except in accordance with applicable securities laws. We seek safe harbor.

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