Mr. David Greenway reports

GIANT MINING TO LAUNCH NEXT PHASE OF EXPLORATION AT MAJUBA HILL TO EXPAND COPPER MINERALIZATION FROM 2024-2025 HIGH-GRADE COPPER AND EXPLORETECH AI-DRIVEN GEOPHYSICS RESULTS

Giant Mining Corp. has expanded its baseline exploration program at the Majuba Hill porphyry copper-silver-gold project, located in Pershing county, Nevada. This decision follows encouraging high-grade copper results from the company's 2024 to 2025 core drilling campaign.

Recent drilling has confirmed significant high-grade copper mineralization, with core holes MHB-30 and MHB-32 yielding particularly promising intercepts. These results, combined with detailed geological studies of porphyry-related magmatic hydrothermal breccias and ExploreTech's AI-driven geophysical modelling, have led the company to accelerate and expand its exploration initiatives at Majuba Hill.

David Greenway, chief executive officer of Giant Mining, commented: "The 2025 drill program at Majuba Hill has been our most ambitious and technically advanced to date. The consistency and predictability of results from our focused drilling campaigns have strengthened the technical team's confidence in advancing Majuba as the next significant copper discovery in Nevada, with the potential to support a future mineral resource estimate.

"While assays are still pending from phase 1 2025, visual core logging and detailed analysis of the 2024 core have already provided a solid foundation for planning phase 2 in Q3 or Q4 2025."

Both holes intersected high-grade copper within porphyry-related, tourmaline-matrix breccia zones (see Table 1), reinforcing the potential for a robust mineralized system at depth and laterally across the project area.

Giant Mining has compiled extensive surface geology and geophysical data sets at Majuba Hill, which have now been fully integrated into an artificial-intelligence-driven modelling system developed by ExploreTech. Building on the success of this approach, the company is initiating phase 2 evaluation, combining advanced machine-learning insights with a targeted, boots-on-the-ground breccia mapping and sampling program in the Northern zone breccia corridor.

The Northern zone hosts porphyry-related, magmatic-hydrothermal breccias that exhibit many of the same geological features encountered in the company's 2024 and 2025 drill campaigns. Historical surface geochemical data from this area reveals extensive anomalies in copper, silver, molybdenum and tin, further supporting its potential as a high-priority exploration target.

High-grade copper intersected in 2024 to 2025 drilling

During 2024 and 2025, seven core drill holes (MHB-30 through MHB-36) were completed, totalling 7,370.5 feet (2,246.53 metres) of drilling. With this addition, cumulative drilling at the Majuba Hill project now stands at 89,395 feet (27,247.5 metres), significantly refining the geological model and enhancing the company's understanding of the mineralization system.

The primary objective of the 2024 to 2025 core drilling program was to conduct stepout drilling from known copper-bearing zones, expanding the mineralized footprint and advancing the project toward the completion of a maiden mineral resource estimate.

Key highlights include:

Hole MHB-30

Core hole MHB-30, announced on Sept. 24, 2024, intersected high-grade copper mineralization hosted within magmatic-hydrothermal, copper-bearing breccia zones. Assay results from this interval returned the following significant intercepts:

• 218.0 feet of 1.35 per cent Cu (copper) and 73.4 g/t (grams per tonne) Ag (silver) from zero to 218 feet (0 to 66.4 m) including:
  • 74.0 feet (22.6 metres) at 2.6 per cent Cu and 30.1 g/t Ag.

Hole MHB-32

MHB-32 intersected two significant copper mineralized zones within a broad interval of 379.5 feet (115.7 m) grading 0.33 per cent Cu and 16.97 ppm (parts per million) Ag, from 510 to 889.5 feet (155.5 to 271.1 m) .

• 85 feet (25.9 m) at 0.64 per cent Cu and 50.89 ppm Ag from 510 to 595 feet (155.5 to 181.4 m);
• 169.5 feet (51.7 m) at 0.41 per cent Cu and 9.51 ppm Ag from 720 to 889.5 feet (219.5 to 271.1 m), including: 40 feet (12.2 m) at 1.36 per cent Cu and 13.33 ppm Ag from 780 to 820 feet (237.7 to 249.9 m), containing 10 feet (3.0 m) at 4.36 per cent Cu and 35.65 ppm Ag from 805 to 815 feet (245.4 to 248.4 m).

Core hole MHB-32 was completed to a total depth of 889.5 feet (271.1 metres). The hole intersected copper-bearing, magmatic-hydrothermal breccias with secondary copper minerals, including azurite, malachite and chalcocite. These transitioned into strongly oxidized copper sulphides, along with primary, unoxidized chalcopyrite near the bottom of the hole.

Hole MHB 36 -- an AI-driven stepout discovery or potential deposit extension

Due to the intersection of the sulphides predicted by modelling the hole was drilled to 1,100 feet (335.28 metres). MHB-36 intersected disseminated and vein-hosted chalcopyrite mineralization within porphyry-related magmatic-hydrothermal breccias, beginning at a down hole depth of 650 feet (198 metres). Mineralization was observed intermittently beyond 905 feet (274.32 metres), confirming the accuracy of ExploreTech's AI prediction.

Majuba Hill's critically important characteristics are as shown in the attached table.

Quality assurance/quality control (QA/QC) measures, chain of custody

The company utilizes a QA/QC program using best industry practices at the Majuba Hill project. The samples are placed in cloth sample bags and are transported from the Giant Mining secure warehouse to the ALS Labs sample prep facility in Elko, Nev. ALS Labs then securely transports the prepared pulps to its analytical lab in North Vancouver, B.C.

Drill core samples are sawn in half lengthwise and one-half is placed in labelled cloth sample bags. All samples are analyzed for copper, gold, silver and 33 other elements. Gold is determined by ALS Labs method Au-AA23 which is a fire assay with an AAS finish on a 30-gram split. Copper, silver and the remaining 31 elements are determined by ALS Labs method ME-ICP61 which is a four-acid digestion and ICP-AES assay. Approximately 5 per cent of the submitted samples are drill duplicates and copper-gold-porphyry commercial standard reference material pulps. The remaining pulps will be retrieved from ALS Labs.

Qualified person

The scientific and technical information contained in this news release has been reviewed and approved by E.L. "Buster" Hunsaker III, CPG 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 (NI 43-101).

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 like 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 is situated in a mining-friendly jurisdiction with supportive regulations and has the potential to become one of the next major copper deposits, critical for meeting the increasing need for this red metal.

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