GR Silver Mining's OTCQX Upgrade Broadens Investor Access as 2026 Exploration Programme Advances

• GR Silver Mining began trading on the OTCQX in February 2026, upgrading from the OTCQB while maintaining its TSXV (GRSL) and Frankfurt Stock Exchange (GPE) listings, expanding US investor access and governance credibility.
• The OTCQX listing opens the company to US-domiciled investors and institutions restricted from lower OTC tiers, broadening market visibility and capital market reach.
• Average daily liquidity of 6.5 million shares on the TSXV, ranking top three among 658 mid-caps in December 2025, supports institutional participation and efficient trading.
• Combined Mineral Resource Estimate (MRE) of 134 million ounces of silver equivalent (Moz AgEq) across San Marcial (68 Moz) and Plomosas (66 Moz) underpins enterprise value benchmarking as the company advances through resource and economic study milestones.
• CAD$28.2 million in cash with no debt funds the 2026 programme, including a 20,000 metre drill campaign, bulk sample test mining, pilot plant restart, updated MRE, and maiden Preliminary Economic Assessment (PEA), reducing near-term financing risk.

OTCQX Listing Expands Market Access

GR Silver Mining began trading on the OTCQX Best Market under the ticker GRSLF in February 2026, upgrading from the OTCQB Venture Market within the OTC Markets Group tiered system. The upgrade represents a governance and compliance milestone rather than simply a trading change. GR Silver Mining retains its existing listings on the TSX Venture Exchange (TSXV) under ticker GRSL and the Frankfurt Stock Exchange (FSE) under ticker GPE, maintaining access to Canadian and European capital markets while expanding visibility in the United States. 

For investors, liquidity is critical when evaluating mining equities, as it allows portfolio managers to enter and exit positions efficiently without impacting market pricing. The OTCQX upgrade provides GR Silver Mining with broader access to US-domiciled investors and institutions that cannot trade lower OTC tiers, effectively expanding the potential investor base. Combined with the company’s existing strong trading activity on the TSXV, the upgrade enhances market visibility and facilitates greater participation from institutional capital.

Asset Scale & Resource Quality Underpin the Valuation Framework

GR Silver Mining’s San Marcial and Plomosas assets provide the tangible foundation for its valuation framework, with resource scale, capital efficiency, and existing infrastructure directly influencing how investors assess enterprise value and development potential.

134Moz AgEq Resource Base Across San Marcial and Plomosas

GR Silver Mining reports a combined Mineral Resource Estimate (MRE) of 134 million ounces (Moz) of silver equivalent (AgEq) across its two Mexican assets, including 68 Moz AgEq at San Marcial and 66 Moz AgEq at Plomosas. Resource scale is a primary valuation anchor for development-stage silver companies, where enterprise value is frequently assessed on an enterprise value per ounce (EV/oz) basis. At 134 Moz AgEq, GR Silver is within the scale range typically used to benchmark the company against emerging silver development peers as the project advances through resource expansion and economic study milestones.

Capital Efficiency & Infrastructure Advantages

Exploration efficiency is a key variable in assessing the sustainability of resource growth. GR Silver Mining reports a discovery cost of CAD$0.17 per ounce of silver. At this level, the company expanded resources at a relatively low cost per ounce, supporting continued exploration across the district-scale land package.

The Plomosas project also benefits from infrastructure inherited from prior mining operations. As a past-producing mine, the project already includes existing infrastructure such as power lines, surface facilities, and a permitted tailings site. The presence of permitted tailings infrastructure removes the need for both the capital expenditure and the permitting timeline typically required to construct new facilities.

Management has emphasised the potential capital advantages associated with this existing infrastructure. President & Chief Executive Officer of GR Silver Mining, Marcio Fonseca, noted:

"There’s a tailings site on site that is ready to be used and permitted. So in the future development of the project, we are not going to have in the capital expenditure the construction and permitting of tailings, because it is already there."

The existing infrastructure at Plomosas reduces upfront capital requirements and may shorten the timeline from resource definition to development, supporting a more capital-efficient path for advancing the project.

Capital Structure & Funding Outlook

GR Silver Mining reports a cash position of CAD$28.2 million with no debt, which the company indicates is sufficient to fund its 2026 exploration and development programme without requiring near-term equity financing. For development-stage companies, a fully funded programme can reduce financing uncertainty and allow management to focus on operational execution rather than capital management.

Fonseca previously described the company’s anticipated cash position and its significance for GR Silver’s financial strength:

"We are going to have a cash position very close to $28 million Canadian dollars. It is really healthy for a company like us, the healthiest position this company has ever been in."

The current balance sheet reflects two recent equity financings: CAD$13.8 million completed in August 2025 and CAD$20 million completed in December 2025, which together strengthened institutional participation and provided the capital foundation for the 2026 programme. The company has also granted 750,000 incentive stock options to consultants at an exercise price of CAD$0.465 per share with a five-year term, including 300,000 options allocated to its investor relations partner. These options represent a defined component of potential future dilution and align external stakeholders with the company’s long-term performance objectives.

Liquidity Profile & Institutional Ownership Dynamics

GR Silver Mining ranked among the top ten TSXV volume traders from July to November 2025, rising to the top three among 658 mid-cap companies in December 2025, with an average daily trading volume of 6.5 million shares. This level of liquidity supports tighter bid-ask spreads and moderates the volatility often seen in junior exploration and development-stage equities. Approximately 74% of the company's shares are held by retail investors, with institutional and high-net-worth investors accounting for 23% and management and insiders holding the remaining 3%. The company has recently begun expanding its institutional shareholder base, with growing institutional support expected to anchor the shareholding structure further and sustain trading volume.

Operational Catalysts & Their Potential Influence on Valuation in 2026

GR Silver Mining’s 2026 programme includes a 20,000 metre drill campaign, bulk sample test mining (BSTM), and a pilot plant restart at the Plomosas project, followed by an updated MRE and a maiden Preliminary Economic Assessment (PEA), which will quantify key economic metrics including net present value (NPV) and internal rate of return (IRR).

Fonseca outlined the planned 2026 drill and pilot plant schedule:

"We are planning now how we can be very aggressive in the first half of 2026, to drill in six months. Probably more than we have ever drilled at San Marcial, with multiple drill rigs, and advance towards the pilot plant by the second half of 2026."

With GR Silver now trading on the OTCQX, these catalysts are positioned to reach a broader US investor base and institutional participants, enabling market pricing to more fully reflect resource growth and project economics.

The Investment Thesis for GR Silver Mining

• The OTCQX upgrade broadens the potential investor base by allowing United States-domiciled investors and institutions that cannot access lower OTC tiers to trade the company more easily through standard brokerage platforms, improving market visibility and capital market reach.
• The company already demonstrates strong liquidity with an average daily trading volume of approximately 6.5 million shares on the TSXV, where it ranked among the top ten volume traders from July to November 2025, rising to the top three among 658 mid-cap companies in December 2025, providing the depth of trading activity often required by institutional investors.
• GR Silver Mining reports a combined Mineral Resource Estimate of 134 million ounces of silver equivalent across the San Marcial and Plomosas projects in Mexico, providing a resource scale that supports enterprise value benchmarking as the company advances toward economic study milestones.
• The company reports CAD$28.2 million in cash with no debt, which management indicates is sufficient to fund its 2026 exploration and development programme, including a 20,000 metre drill campaign, bulk sample test mining and pilot plant restart, followed by an updated Mineral Resource Estimate and maiden Preliminary Economic Assessment.

Taken together, GR Silver Mining combines district-scale silver resources, capital-efficient exploration, existing infrastructure, and a fully funded 2026 programme, positioning the company to advance its assets while expanding visibility among United States and international investors following its OTCQX upgrade.

TL;DR

GR Silver Mining upgraded to the OTCQX in February 2026, expanding US investor access while maintaining TSXV and FSE listings, supported by strong liquidity of 6.5 million shares daily, ranking in the top three among 658 mid-caps in December 2025. The company holds CAD$28.2 million in cash with no debt, fully funding its 2026 exploration and development programme, which includes a 20,000m drill campaign, bulk sample test mining, pilot plant restart, updated MRE, and maiden PEA. Its combined 134 Moz AgEq resource base across San Marcial (68 Moz) and Plomosas (66 Moz), low discovery costs, and existing infrastructure underpin valuation benchmarks and potential capital efficiency, positioning GR Silver to advance its assets while broadening visibility to US and international investors.

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