Giant Mining Intersects Thick Intervals of Oxide Copper at Majuba Hill, Extending Mineralized Breccia Zone

VANCOUVER, BC — JULY 15, 2025 — TheNewswire - Giant Mining Corp. (CSE: BFG | OTC: BFGFF | FWB: YW5 | CSE: BFG.WT.A | CSE: BFG.WT.B) (“Giant Mining” or the “Company”) is pleased to report additional assay results from Phase 1 of the Spring 2025 diamond drilling program (the “Core Program”) including core holes MHB-33, MHB-34, and MHB-35, completed at the Majuba Hill Porphyry Copper-Silver-Gold Project (“Majuba Hill”) in Pershing County, Nevada.

These results from the Core Program confirm strong breccia controls and significant high-grade copper mineralization and correlate with high-grade intercepts previously identified in core holes MHB-30 and MHB-32. The primary objective of the Core Program was to delineate and better understand the geometry and extent of the copper-bearing breccia zones. Assay results and geological interpretation outline a large, distinct copper-mineralized breccia body at Majuba Hill.

Highlights

• Copper within the Mineralized Breccia Body in MHB-34 included enriched and primary (hypogene) copper mineralization (see Figure 2 and Table 1): 

• 500 ft (152.4 m) @ 0.21% Cu from 1210-1710 ft (368.8-521.2 m) including165 ft (50.3 m)@ 0.24% from 1280-1445 ft (390.1-440.4 m) 

and; 205 ft (62.5 m) @ 0.27% Cu from 1605-1710 ft (458.7-521.2 m)

        with; 55 ft (16.8 m) @ 0.41% Cu from1505-1560 ft (458.7-475.5 m)

Core hole MHB-34 intersected long intervals of copper mineralization within both the main Mineralized Breccia Body and the Marginal Breccia Zone (Figure 2). Meanwhile, holes MHB-33 and MHB-35 focused on shallower portions of these zones (Figure 5). The new results confirm, extend, and further define the continuity and significance of breccia-controlled copper mineralization across the project.

As previously announced in the May 22, 2025 news release, core hole MHB-32 intersected two significant copper-mineralized zones within a broader interval of 379.5 feet (115.7 m) grading 0.33% Cu and 16.97 ppm Ag, from 510 to 889.5 feet (155.5 to 271.1 m). These results extended known mineralization deeper and further north than previous drilling. Key intercepts from MHB-32 include:

• 85 feet (25.9 m) grading 0.64% Cu and 50.89 ppm Ag, from 510 to 595 feet (155.5 to 181.4 m) 

• 169.5 feet (51.7 m) grading 0.41% 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% Cu and 13.33 ppm Ag, from 780 to 820 feet (237.7 to 249.9 m), which contains: 

    • 10 feet (3.0 m) at 3.6% Cu and 35.65 ppm Ag, from 805 to 815 feet (245.4 to 248.4 m) 

David Greenway, CEO of Giant Mining, commented: "The assay results from MHB-33, MHB-34, and MHB-35 are very positive and continue to validate the scale and continuity of breccia-hosted copper mineralization at Majuba Hill. With copper emerging as a national security priority under the current U.S. administration, and Nevada ranked as the number one mining jurisdiction in the United States, the stars are aligning for Giant Mining. We’re fully funded for the next phase of drilling, and our team — led by Buster Hunsaker — is eager to launch Phase 2. We’re incredibly proud of the work accomplished so far and excited about what lies ahead as we advance our mission to help reshore America’s copper supply."

Figure 1: MHB-34 Mineralized Breccia: Chalcopyrite, Cuprite and Native Copper in Breccia. 1540-1545 feet/0.62% Cu.  (See Table 1)      

• Copper within the Marginal Breccia in MHB-34 included an oxide and enriched interval of: 

• 135 ft (41.1 m) @ 0.14% Cu from 625-760 ft (190.5-231.6 m) 

including: 10 ft (3.0 m) @ 0.40% Cu from 665-675 ft (202.7-205.7 m)

• CopperMineralization in MHB-34 extended the Mineralized Breccia Body to at least 1640 vertical feet (500m) below the top of Majuba Mountain (see Figure 2)  

• Mineralized Breccia Body remains open at depth 

• Copper intersected in MHB-34 returned 0.09% Cu over the entire 1,963-foot (598.3 m) length of MHB-34, which when combined with silver results has a copper equivalent value of 0.13% CuEq (Table 1). 

Figure 2: Interpretive Cross Section: Core Holes MHB-34 and MHB-35 and previous drilling (see Figure 6 for location).

Additional Highlights

• MHB-35 

• Drilling intersected 90 ft (27.4 m) @ 0.09% Cu from 115-205 ft (35.1-62.5 m). The hole is strongly clay altered in partially leached, hydrothermal-magmatic breccias that comprise the Mineralized Breccia Body (Figure 2). Below the mineralization is a significant zone of copper mineralization in MHB-32 that graded 379.5 feet (115.7 m) @ 0.33% Cu and 16.97 ppm Ag from 510 to 889.5 feet (155.5 to 271.1 m). 

Figure 3: MHB-35 PQ Core with partially leached Mineralized Breccia

• MHB-33 

• The Marginal Breccia intersected in MHB-33 identified the upper, western extents of the Mineralized Breccia Body mined in the historic Copper Stope (see Figure 5). Drilling intersected leached copper mineralization including 35 ft (10.7 m) @ 0.09% Cu from 5 to 40 ft (1.5-12.2 m) with numerous 5 foot (1.5 m) intervals of 0.1% copper (see Table 1). 

Figure 4: MHB-33 PQ Core with leached Marginal Breccia

Figure 5: Interpretive Cross Section: Core Hole MHB-33 and previous drilling (see Figure 6 for location).

Figure 6: Drill Hole Locations with Cross Section Locations.

Table 1: Significant Copper Intervals for 2024 and 2025 Drilling. (*True widths are unknown.)

*Copper Equivalent Calculation:
Copper equivalent (CuEq) values were calculated by combining the assay values for copper and silver assay results for each intercept using an interval-weight calculation based on $4.475/lb Cu and $31.29/oz Ag. 

Majuba Hill’s critically important characteristics are as follows:

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, Nevada. ALS Labs then securely transports the prepared pulps to their analytical lab in North Vancouver, B.C.

Drill core samples are sawn in half lengthwise and one half is placed in labeled 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% 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 km) from Reno, Nevada. 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.

Neither the Canadian Securities Exchange nor its Market Regulator (as that term is defined in the policies of the Canadian Securities Exchange) accepts responsibility for the adequacy or accuracy of this release.

On Behalf of the Board of Giant Mining Corp.

“David Greenway”

David C. Greenway

President & CEO

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Forward-Looking Statements

This news release contains certain forward‐looking information. Such information involves known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements to be materially different from those implied by statements herein, and therefore these statements should not be read as guarantees of future performance or results. All forward‐looking statements are based on the Company’s current beliefs as well as assumptions made by and information currently available to it as well as other factors. Readers are cautioned not to place undue reliance on these forward‐looking statements, which speak only as of the date of this press release. Due to risks and uncertainties, including the risks and uncertainties identified by the Company in its public securities filings, actual events may differ materially from current expectations. The Company disclaims any intention or obligation to update or revise any forward‐looking statements, whether as a result of new information, future events or otherwise.