Metallis Fortifies Technical Team for High-Potential Idaho Gold-Silver Project

VANCOUVER, BC – December 29, 2025 – Metallis Resources Inc. (TSXV: MTS) (OTCQB: MTLFF) is significantly bolstering its technical expertise for the promising Greyhound Property in Idaho, appointing long-standing director and decorated geologist Dr. David Webb to the role of Technical Advisor. The move signals a strategic push to accelerate exploration at the historically rich but underexplored site, complemented by a new communications initiative aimed at increasing market visibility.

Fiore Aliperti, President and CEO of Metallis, highlighted the significance of the appointment. "We're very happy to be able to add Dr. Webb to our technical team," he stated in a corporate release. "The fact we're now able to tap into his vast geological experience is great news for Metallis."

Dr. Webb's expanded role is timed with his increased availability for 2026 and is expected to provide direct, hands-on guidance for the Greyhound project, a historic silver camp showing potential for significant polymetallic deposits.

A Proven Gold-Finder Joins the Hunt

Dr. David Webb is not just another name on a technical advisory board; he is a highly credentialed geologist (Ph.D., P.Geol., P.Eng.) with a track record of major mineral discoveries spanning over three decades. His career is distinguished by his work in Canada's challenging Yellowknife region, where he is credited with identifying both the largest granitic-hosted gold deposit in the Northwest Territories and the largest gold deposit found in the prolific Yellowknife Greenstone Belt in the last 30 years.

Crucially, Dr. Webb’s doctoral research and extensive field experience are focused on structurally controlled vein-style mineralization—the exact geological model that characterizes the Greyhound Property. This specific expertise is what the company believes will be instrumental in advancing the project from exploration to deposit definition. His experience extends beyond discovery, having advanced multiple projects through permitting, engineering studies, and resource delineation. Currently, he also serves as President and CEO of Sixty North Gold Mining, which is working to restart the Mon Gold Mine, a past-producing mine he originally developed in the Yellowknife Gold Belt.

His deep involvement is seen as a major de-risking factor for the Greyhound project, bringing a layer of proven, specialized knowledge to the interpretation of drill results and the planning of future exploration campaigns.

Unlocking a Historic Idaho Silver Belt

The Greyhound Property itself is the centerpiece of this renewed technical focus. Optioned by Metallis in February 2024, the property is located in Custer County, Idaho, a region with a storied mining past. In the early 1900s, the area was an active silver mining camp, complete with a smelter and two mines operating along the 3.5-kilometer Greyhound shear zone.

Despite this history, the property has remained remarkably underexplored by modern methods. Until Metallis launched its inaugural drill program in 2025, the property had never been drill-tested. Historical records, while not independently verifiable by the company, paint a tantalizing picture of the area's potential. Archived reports from the late 19th and early 20th centuries mention exceptionally high-grade samples, including some from the on-property Bulldog Mine that reportedly assayed as high as 35,226 grams per tonne (g/t) gold and 128,250 g/t silver.

The mineralization at Greyhound is polymetallic, hosted in quartz-sulphide veins containing elevated concentrations of gold, silver, lead, zinc, and the critical mineral antimony. The company has noted geological similarities between Greyhound and the highly productive Lucky Friday Mine in northern Idaho, which also features vein mineralization in a tabular body, though it cautions that this does not guarantee comparable results.

The Strategic Importance of Antimony and Idaho

The project's potential extends beyond precious metals. The presence of antimony positions the Greyhound Property within a broader strategic context. Antimony is designated as a critical mineral by the United States government due to its importance in military applications, flame retardants, and energy technologies, coupled with a supply chain dominated by China and Russia.

Greyhound is situated just 35 kilometers south of Perpetua Resources' Stibnite Gold Project, which hosts the largest known antimony deposit in the U.S. The growing focus on securing domestic sources of critical minerals makes exploration projects like Greyhound increasingly relevant. Furthermore, Idaho is consistently ranked as one of the world's top mining jurisdictions for political stability and investment attractiveness, placing 6th globally in the Fraser Institute's 2022 survey. This favorable environment provides a stable backdrop for Metallis's exploration and potential development efforts.

Boosting Market Visibility in a Competitive Sector

Alongside its technical advancements, Metallis is making a concerted effort to engage the investment community. The company recently participated in a corporate interview with Goldfinger Capital, a platform specializing in the junior resource sector, where management discussed the 2025 drill program and outlined plans for 2026.

To amplify this outreach, Metallis has formally engaged Robert M. Sinn, a professional trader, market analyst, and senior content creator at Goldfinger Capital. According to the agreement, Mr. Sinn will provide communication services for a six-month period for a cash fee of US$15,000. Such paid promotional engagements are a common strategy for junior exploration companies seeking to cut through the noise and attract capital in a competitive market. This move comes as the company's Q3 2025 financials show a decrease in total assets and a significant increase in liabilities, underscoring the importance of attracting fresh investment to fund its ambitious exploration plans for both the Greyhound project and its 100%-owned Kirkham Property in British Columbia's Golden Triangle.

As Metallis heads into 2026, it is executing a dual-pronged strategy: leveraging elite technical skill to unlock the geological potential of a historic American mining district while simultaneously ensuring its story reaches a wider audience of potential investors.