Mr. David Greenway reports

GIANT MINING SITE VISIT HIGHLIGHTS ONGOING DRILLING BEYOND 1,000 FEET AT MAJUBA HILL COPPER-SILVER-GOLD PROJECT IN NEVADA

Key members of Giant Mining Corp.'s executive team have visited the continuing drill program at Majuba Hill porphyry copper-silver-gold deposit, located in Pershing county, Nevada.

During the site visit, drilling surpassed 1,000 feet (304.8 metres) at hole MHB-34. MHB-34 is the third of five holes of the 2025 diamond core drilling program, currently under way.

As previously stated, the primary objective of the core program is to expand the known zones of copper mineralization at Majuba Hill and advance the project toward a new mineral resource estimate (MRE).

David Greenway, chief executive officer of Giant Mining, commented: "The company has now collectively drilled over 2,500 feet of development drilling in 2025 to adding to the drill database of over 80,000 feet of past drilling and over 100 historical holes of development and deposit understanding at Majuba Hill. This is another step toward advancing Majuba Hill toward our ultimate goal of a new [National Instrument] 43-101 mineral resource estimate. The scale and potential of this system continue to impress and the entire team at Giant Mining has never had more conviction in advancing Majuba Hill toward its true potential."

Big Sky Exploration LLC of Eureka, Nev., successfully completed drilling of hole MHB-33 and mobilized the drill rig to a new pad where hole MHB-34 has commenced drilling. MHB-33 was quick logged and tagged for sampling on site by Giant Mining geologists as part of the company's efforts to efficiently advance the 2025 core program at Majuba Hill.

The core samples from MHB-32 and MHB-33 have been securely transported to Giant Mining's secured warehouse facility in Elko, Nev. At this location, the cores are being sawn in half and sampled. Following this, the processed samples will be sent to ALS Group USA Corp. (ALS Labs) in Elko, Nev. At ALS Labs, the samples will undergo analyses, including assays for copper, silver, gold and other trace elements, to accurately assess the mineral content and support continuing exploration efforts at Majuba Hill.

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.

Warrant expiry

The company also wishes to advise shareholders that approximately four million tradable warrants are still outstanding and are expiring May 1, 2025 (within the next three weeks). Investors who want to benefit from the warrants are encouraged to exercise their warrants prior to expiry.

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 NI 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 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.