Mr. David Greenway reports

GIANT MINING MHB-34 DRILLED TO 1,963 FEET WITH ASSAYS NOW PENDING FROM MHB-33 AT MAJUBA HILL COPPER-SILVER-GOLD PROJECT, NEVADA

Giant Mining Corp. has drilled hole MHB-34 to 1,963 feet (598.3 metres). MHB-34 is the third of five holes of the 2025 diamond core drilling program, currently under way at the Majuba Hill porphyry copper-silver-gold deposit, located in Pershing county, Nevada.

Furthermore, the company is pleased to announce that all core from hole MHB-33, which was drilled to a total depth of 936 feet (285.29 metres), has been sampled and submitted to ALS Global Services (ALS Labs) for analysis. A previous news release dated April 8, 2025, errantly reported a total depth of 950 feet (289.56 metres) versus the actual total depth of 936 feet (285.29 metres).

The company further announces hole MHB-35 (at site PDH-DUH1) was completed to 596 feet (181.66 metres). The primary goal of the core program is to expand known copper mineralization at Majuba Hill and advance the project toward a new mineral resource estimate (MRE).

David Greenway, chief executive officer of Giant Mining, enthusiastically commented: "We are thrilled with the ongoing progress at Majuba Hill. As previously stated, in my entire career, I've never seen drill core like what we saw at MHB-34, which was drilled to a total depth of 1,963 feet. Majuba Hill is rapidly emerging as a world-class copper, silver and gold discovery, perfectly positioned as a vital American resource. Nevada's incredible infrastructure and mining-friendly environment only amplify this project's immense value. Giant Mining is proud to help secure America's clean energy future and achieve critical mineral supply chain independence."

Infrastructure advantage

The Majuba Hill project is strategically positioned within a mining-friendly jurisdiction and benefits from an infrastructure setting that is favourable for efficient project advancement. Key elements already in place include well-maintained access roads, nearby power supply, nearby transportation routes (highway and rail), and areas potentially suitable for processing, waste management and administrative operations.

As previously reported in the March 17, 2025, news release, the 2025 core program has been designed to follow up on high-grade copper mineralization intersected in breccias from the 2024 core holes MHB-30 and MHB-31 and extend the high-grade copper zones below the historic underground workings.

The company will provide regular updates as the drill program progresses, including assay results, geological observations and any significant developments encountered during drilling. These updates will keep shareholders and stakeholders informed on the advancement of the Majuba Hill project and its potential to support a future resource estimate.

Quality assurance/quality control (QA/QC) measures and 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 or plastic sample bags and are transported from the Majuba Hill project to the Giant Mining secure warehouse for core sawing and processing and then samples are delivered to the ALS Labs sample prep facility in Elko, Nev. ALS then 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 sample pulps are retrieved from ALS Minerals and retained by the company for future metallurgical testing.

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 113 road kilometres (70 miles) southwest of Winnemucca, Nev., and 251 kilometres (156 miles) northeast of Reno. Access is by well-maintained county roads from the Imlay, Nev., exit on U.S. Interstate 80 and travelling westward 23 miles. People, roads, power and water are the basic elements when considering infrastructure, and Majuba Hill already has a solid infrastructure foundation for building a large facility, which will provide significant savings compared with more remote projects.

History:  historical producer

Drilling:  83,930 feet of drilling to date; rough replacement value of drilling $10.4-million (U.S.) in development 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 induced polarization survey, deep drilling and stepout drilling indicate significant expansion potential, with mineralization open in all directions.

Fully financed:  secured financing for 2025 drilling campaign

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 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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