Mr. David Greenway reports

GIANT MINING CORP. ADVANCES METALLURGICAL TEST WORK AT MAJUBA HILL NEVADA COPPER-SILVER-GOLD PROJECT AS METAL PRICES HIT RECORDS

Giant Mining Corp. is planning to undertake additional metallurgical test work to update and expand upon historical metallurgy completed at its Majuba Hill copper-silver-gold project in Pershing county, Nevada.

The additional metallurgical work will refine the company's understanding of copper, silver and gold recoveries across oxide, transition and sulphide zones within the Majuba Hill porphyry system.

High-grade copper-silver historical drill support

Majuba Hill has demonstrated strong high-grade copper and silver mineralization in historic drilling, including hole MHB-30: 74.0 feet averaging 2.6 per cent copper and 30.1 grams per tonne silver, within 218 feet averaging 1.35 per cent copper and 73.4 grams per tonne silver. These high-grade intervals highlight the system's strength and reinforce the significance of silver. Currently, Respec Company LLC is refining the geological model and incorporating silver assays to advance the delineation of the copper-silver-gold system at Majuba.

David Greenway, president and chief executive officer of Giant Mining, stated: "With copper, silver and gold recently hitting all-time highs and analysts suggesting higher prices are still ahead, Majuba Hill is showing excellent potential as a district-scale copper-silver project with meaningful gold credits. Historical work indicates copper recoveries of up to 80 per cent and silver recoveries up to 75 per cent, with gold requiring modern recovery methods that we intend to evaluate. Updating this work is the natural next step as we advance Majuba Hill. With strong historic drill results and encouraging early-stage, historical metallurgical results, we believe continued technical work is warranted to further assess the multimetal potential that is emerging in the Majuba Hill porphyry system."

All three of the key commodities at the Majuba Hill project -- copper, silver and gold -- have recently achieved record all-time highs, underscoring the strength of the market environment surrounding the project. According to the Trading Economics website:

• Copper reached an all-time high of $5.94 (U.S.) per pound in July, 2025, and is currently trading at approximately $5.21 (U.S.) per pound.
• Silver achieved an all-time high of $58.85 (U.S.) per ounce in December, 2025, and is currently trading around $57.65 (U.S.) per ounce.
• Gold hit an all-time high of $4,381.58 (U.S.) per ounce in October, 2025, and is now trading at approximately $4,216 (U.S.) per ounce.

Commodity prices are provided for context only and do not imply that the project has demonstrated economic viability.

Objectives of the planned metallurgical program

The company's metallurgy program aims to:

• Assess oxide, mixed and sulphide mineralization domains;
• Improve the understanding for copper, silver and gold recovery processes;
• Evaluate multistage processing options (heap leach and/or flotation and/or vat leaching);
• Evaluate downstream silver and gold circuits;
• Generate new technical data for mineralization delineation and future economic studies.

Overview of historical metallurgical findings

Historic metallurgical test work and studies have provided encouraging indications for Majuba Hill's processing potential. The findings reinforced the company's confidence to press forward and expand the mineralization with the continuing exploration drilling program that has focused on defining a resource. These historical studies while encouraging are early stage. The results provide the basis for proceeding with the comprehensive metallurgical testing -- the focus of the newly announced program.

Acid versus cyanide leach testing study (2012 -- historic reverse circulation drill samples):

• Acid-soluble and cyanide soluble copper and silver recoveries were evaluated across low-, mid- and high-grade material in 231 samples.
• When adjusting for ferric iron generation typical of operating heap-leach systems, overall copper recovery estimates increased to:
  • Approximately 60 per cent for low grade;
  • Approximately 70 per cent for mid-grade.

Laurion Consulting composite leach test (2013):

• A single composite sample grading 0.62 per cent copper and 34.6 grams per tonne silver tested using sulphuric acid achieved:
  • Approximately 81.1-per-cent copper extraction at six mesh and approximately 84.6-per-cent copper extraction at 200 mesh over a 14-day leach cycle.
• Results suggest Majuba Hill oxide material is amenable to conventional heap-leach processing with copper recovered by SX/EW (solvent extraction/electrowinning).

Flotation study (2017 internal company report for historic core drill samples):

• This was a comparison study that used copper and silver extraction through flotation and agitated leach. Bench-scale testing that varied the collector concentration and pH achieved:
• • 44.5-per-cent to 74.9-per-cent silver recovery.
• Results were compared with a traditional heap-leach/SX/EW process.

The metallurgical test work and drilling results referenced in this news release are considered historical in nature. The company has not independently verified the data, which predate the company's involvement at Majuba Hill, and the work was not completed in accordance with current CIM (Canadian Institute of Mining, Metallurgy and Petroleum) definition standards or modern quality assurance/quality control practices. As such, the results should not be relied upon and are used by the company solely to guide current and future exploration and metallurgical programs.

Majuba Hill's critically important characteristics are as follows.

Location:   Nevada, United States -- a globally top-ranked mining jurisdiction, ranked No. 1 in the Fraser Institute's 2022 annual survey of mining companies

Project size:  9,684 acres

Infrastructure:  The Majuba Hill property is located 113 road kilometres (70 miles) southwest of Winnemucca, Nev., and 251 kilometres (156 miles) northeast of Reno. It is accessible through well-maintained county roads from the Imlay, Nev., exit on U.S. Interstate 80, followed by a 23-mile drive west. People, roads, power and water are fundamental considerations for infrastructure, and Majuba Hill already benefits from a strong foundation in all these areas. This existing infrastructure provides a significant advantage, offering substantial cost savings compared with more remote projects.

History:  historical producer

Drilling:  approximately 89,395 feet of drilling to date; rough replacement value of drilling $12.1-million (U.S.) using current costs

Mineralization:  The project shows indications of a potentially large copper-silver-plus-or-minus-gold-mineralized body with many features in common with both large porphyry copper, silver and gold projects.

Expandability:  The IP (induced polarization) survey, deep drilling and stepout drilling indicate significant expansion potential, with mineralization open in all directions.

Fully financed:   secured financing for next phase of drilling at Majuba Hill

Qualified person

The scientific and technical information contained in this news release has been reviewed and approved by E.L. (Buster) Hunsaker, CPG No. 8137, a non-independent consulting geologist who is a qualified person as such term is defined under National Instrument 43-101, Standards of Disclosure for Mineral Projects.

About Giant Mining Corp.

Giant Mining is focused on identifying, acquiring and advancing late-stage copper and copper/silver/gold projects to meet the growing global demand for critical metals. This demand is driven by initiatives such as the Green New Deal in the United States and similar climate-focused programs worldwide, which require substantial amounts of copper, silver and gold for electric vehicles, renewable energy infrastructure, and the modernization of clean and affordable energy systems.

The company's flagship asset is the Majuba Hill copper, silver and gold district, located 156 miles (251 kilometres) from Reno, Nev. Majuba Hill benefits from a mining-friendly regulatory environment and strong local infrastructure. While still an exploration-stage asset, the geological footprint and scale of mineralization indicate that further work is clearly justified and that the system may host significant copper potential.

We seek Safe Harbor.