GR Silver Mining Targets US Investors with OTCQX Upgrade, Plomosas Focus

VANCOUVER, BC – February 24, 2026 – GR Silver Mining Ltd. has executed a series of strategic maneuvers designed to sharpen its focus and broaden its investor appeal, culminating in its commencement of trading on the OTCQX Best Market. The upgrade, effective today, is coupled with the tactical disposition of non-core assets, signaling a clear corporate directive: unlock the full potential of its flagship Plomosas silver-gold project in Mexico by attracting a wider base of U.S. capital.

Beginning today, U.S. investors can trade the company's shares under the ticker symbol "GRSLF" on the OTCQX, a move that provides enhanced visibility and access to real-time financial data. The move is part of a calculated strategy to streamline operations and concentrate resources on what the company believes is its most valuable asset.

A Strategic Upgrade for U.S. Markets

The graduation from the OTCQB Venture Market to the OTCQX Best Market is more than a symbolic change. The OTCQX is the top tier of the OTC Markets Group, reserved for established, investor-focused companies that meet high financial standards and demonstrate best practices in corporate governance and regulatory compliance. For junior mining companies like GR Silver, such an upgrade can significantly increase liquidity and attract a more diverse pool of institutional and retail investors in the United States.

Research indicates that international firms joining the OTCQX can experience a substantial increase in U.S. ownership and trading volume, both in their home market and on the OTC platform. This enhanced access is a key part of the company's growth plan.

"Our daily trading volume and support from new shareholders has been growing consistently in the OTC market," commented Márcio Fonseca, President & CEO of GR Silver Mining. "To continue our commitment to offer the best platforms to our shareholders we believe that upgrading to the OTCQX is a natural next step and will help us better achieve that goal."

Sharpening Focus on the Plomosas Project

Underscoring its commitment to the Plomosas Project, GR Silver has finalized the disposition of 12 non-core concessions. The company divested its 100% stake in Goldplay de Mexico, S.A. de C.V., to a private Mexican company. In exchange, GR Silver retains a 1% Net Smelter Return (NSR) royalty on the concessions.

This move is strategically significant. It removes the ongoing tax burden and administrative costs associated with these peripheral assets, allowing management to dedicate its full attention and financial resources to its core project. The 1% NSR royalty structure provides a clever hedge, allowing GR Silver to benefit from any future production success on the properties without incurring any of the exploration or development risks and costs. This transaction effectively streamlines the company's portfolio without completely forfeiting future upside.

The beneficiary of this sharpened focus is the 78-square-kilometer Plomosas Project, an emerging high-grade silver district located on the prolific western edge of the Sierra Madre Occidental, a region with a rich mining history. The project includes the past-producing Plomosas underground mine, which benefits from existing infrastructure, road access, and permits, significantly de-risking and potentially accelerating future development timelines.

Unlocking a Mexican Silver Giant

The geological potential at Plomosas is substantial. The project boasts a combined resource base of 134 million silver-equivalent ounces, according to a 2023 technical report. This resource is spread across distinct zones, including the silver-dominant San Marcial Area and the Plomosas Mine Area, which contains significant lead and zinc credits alongside silver and gold.

Crucially, the resource remains open for expansion. Exploration has barely scratched the surface, particularly at San Marcial, where an estimated 80% of a large geophysical anomaly—a key indicator of potential mineralization—remains untested by drilling. Step-out drilling campaigns are already underway in 2026 to expand the known mineralization footprint, with the company aiming for continuous resource growth.

The historical Plomosas Mine itself, operated by Grupo Mexico from 1985 to 2000, offers a near-term path to production. Recent underground sampling has confirmed high-grade mineralization is accessible, paving the way for a planned Bulk Sampling Test Mining Program. The company has already completed detailed laser surveys of the existing 7.4 kilometers of underground tunnels to support mine planning, with a pilot processing plant targeted for early 2026.

Riding Market Tailwinds

GR Silver's strategic pivot is occurring against a highly favorable macroeconomic backdrop. Both silver and gold have seen powerful price surges entering 2026. The silver market, in particular, is experiencing a structural supply deficit, with The Silver Institute forecasting a sixth consecutive annual shortfall. This tightness is driven by robust industrial demand—fueled by the green energy transition and electronics—and resurgent investment demand. With Mexico poised to be a key driver of new primary silver mine supply, well-positioned projects like Plomosas are attracting significant attention.

To capitalize on this momentum, GR Silver has also bolstered its corporate structure, granting 750,000 incentive options to external consultants and engaging Redwood Empire Financial Communications for dedicated investor relations services at a cost of US$7,500 per month. These moves are typical of a company preparing for a new phase of growth, aiming to align stakeholder interests and amplify its message to a global investment audience.

With its corporate house in order, a streamlined focus on a high-potential flagship asset, and enhanced access to the world's largest capital market, GR Silver Mining is positioning itself to translate geological promise into shareholder value in a bullish market for precious metals.