Glenstar Minerals Finalizes Phase 1 Drilling at Wildhorse Project, Validates High-Grade Polymetallic Mineralization in Nevada

Early Exploration and Notable Surface Sampling Outcomes

Glenstar began exploration at the Wildhorse Project in June 2025 with rock chip sampling and geological mapping across three zones exhibiting outcropping mineralization. Initial fieldwork completed in July 2025 revealed promising copper values alongside silver and tungsten-bismuth anomalies, laying the groundwork for expanded exploration.

Additional assay results received on September 3, 2025, showed rock chip samples containing 11.2 g/t gold, 11.35 g/t silver, and copper values reaching 39%. These high-grade surface assays led to a significant land position increase from the original 45 claims (~900 acres) to 61 claims (1,220 acres). Subsequently, Glenstar staked 28 more claims around the Coca Cola and Highland Zones, bringing the total to 89 claims covering 720 hectares (1,780 acres).

Trenching Program Defines Coca Cola Zone Mineralization

Following encouraging surface results, Glenstar obtained a Bureau of Land Management (BLM) permit in November 2025 for a trenching program to better expose the Coca Cola Zone. The program started in early February 2026 and completed by early March.

The trenching identified a metre-scale bedrock zone with quartz veining and copper oxide and sulfide mineralization traced over 15 metres (50 feet) along an east-west strike. Two trenches exposed four bedrock cuts with fourteen chip channel samples (~1.5 metres each). The trenches were wider than planned, exposing additional mineralized bedrock and negating the need for a third trench.

The trenching revealed a broader alteration zone than expected and uncovered an east-west mineralization trend intersecting the previously assumed north-south trend. The anomalous copper and gold mineralization, combined with historical data, suggests the presence of a copper-gold porphyry system of unknown scale beneath the property.

Magnetic Survey and Geological Interpretation Support Porphyry Potential

Glenstar conducted a magnetic survey and geological mapping to enhance understanding of subsurface geology and mineralization distribution. Alterations involving magnetite, epidote, and pyrite at the Coca Cola Zone align with characteristics typical of copper-porphyry systems.

While these geological indicators suggest porphyry-style mineralization, further exploration and analysis are necessary to confirm the system's nature and extent. The trenching and mapping results supported advancing to the drilling phase.

Execution of Phase 1 Reverse Circulation Drilling Program

On March 17, 2026, Glenstar applied to the BLM for a reverse circulation drill program at Wildhorse, initially planning thirteen holes: six at Coca Cola and seven at Rattlesnake Zones. The BLM approved the permit and authorized construction of 670 metres (2,200 feet) of new access roads.

The program began in late April 2026 at Coca Cola with four holes completed, encountering narrow intervals of strong alteration and local copper oxide mineralization. The rig then moved to the Rattlesnake Zone, approximately 488 metres (1,600 feet) northeast.

Encouraged by visual observations, Glenstar expanded the drill program from 1,067 metres (3,500 feet) to approximately 1,311 metres (4,300 feet). The Phase 1 program concluded on May 13, 2026, with ten holes drilled in total: six at Rattlesnake and four at Coca Cola.

Rattlesnake Zone Drilling Highlights and Mineralization Intervals

Drilling at Rattlesnake targeted the core of a high-grade polymetallic system, exploring down-dip extensions 85 to 110 metres (279 to 361 feet) east of surface mineralization, historically accessed by decline workings. All six holes displayed strong alteration with quartz veinlets in foliated metasedimentary host rock.

Hole RTSRC-1 intersected multi-metre intervals of oxide alteration and mineralization from surface to 105 metres (345 feet), followed by a partially oxidized sulfide zone from 105 to 117 metres (345 to 385 feet) featuring chalcopyrite and fine-grained silver-grey sulfides, with sulfide abundance around 5% and a notable hydrogen sulfide odor. Oxide minerals on fractures ranged from yellow to bright blue.

Hole RTSRC-2 showed gossanous orange and red zones from surface to 66 metres (215 feet), and a 9.1-metre (30-foot) interval of intense oxide mineralization with abundant quartz veinlets from 66 to 75 metres (215 to 245 feet), intersecting the main mineralized zone down-dip 98 metres (320 feet) east of surface outcrops.

Contacts between metasedimentary host rock and feldspar porphyry intrusions were strongly altered with abundant oxide minerals and quartz veinlet swarms, observed at depths of 100 to 150 metres (328 to 492 feet) and near surface in holes RTSRC-3 and RTSRC-6.

Assay Sample Submission and Anticipated Results Timeline

After completing Phase 1 drilling, Glenstar submitted 860 drill samples from Wildhorse to Paragon Geochemical Inc. in Sparks, Nevada, for detailed assay analysis. These samples will help quantify grades and mineralogy to refine the geological model.

Assay results are expected by early August 2026, subject to lab turnaround. Once received, results will be integrated into the geological model to refine exploration targets and guide planning for subsequent exploration phases. These results will be pivotal in assessing the economic potential and future investment at Wildhorse.

Management Insights and Exploration Prospects

David Ryan, President and CEO of Glenstar Minerals, described the project’s progression: "Over the past year, Wildhorse has transformed from a promising exploration target into a project delivering high-grade surface samples, encouraging geological findings, and multiple pathways for advancement." He emphasized that while further work is needed to understand mineralization controls fully, current results reinforce the belief that Wildhorse may host a significant mineralized system.

The Company’s structured approach—from rock chip sampling and mapping to magnetic surveys, trenching, and drilling—demonstrates a methodical strategy to de-risk exploration and build confidence in the geological model. Expanding the drill program during execution, based on positive visual results, highlights management’s confidence and commitment to maximizing exploration value.

Glenstar’s Exploration Portfolio and Corporate Strategy

Glenstar Minerals specializes in polymetallic mineral exploration, focusing on critical minerals essential for advanced electronics, energy storage, and technologies supporting the global energy transition. Besides Wildhorse, Glenstar owns the Green Monster Property, consisting of 35 federal lode claims (~700 acres) in Clark County, Nevada, about 40 miles southwest of Las Vegas. The Green Monster underwent drilling in May 2025 after 2022 sampling revealed strong nickel-copper and anomalous cobalt values.

The Wildhorse Property includes 89 mineral claims covering 720 hectares (1,780 acres) in Mineral County, Nevada. Targeting began after compiling data including a 1975 Anaconda Company field examination archived at the University of Wyoming. Historical workings date back to the late 1800s and early 1900s. Glenstar trades on the Canadian Securities Exchange (CSE) as "GSTR", on the Frankfurt Stock Exchange as "VO20", and on the OTCQB market in the U.S. as "GSTRF".

Qualified Person Review and Technical Compliance

The scientific and technical data in this release have been reviewed and approved by Robert Marvin, P.Geo. (Ontario), an independent consulting geologist and Qualified Person under National Instrument 43-101 standards. This independent review ensures compliance with Canadian securities disclosure requirements for mineral exploration.

Engagement of a qualified person for technical disclosure is mandatory for Canadian mineral exploration companies, ensuring accuracy and reliability of information provided to investors. Glenstar’s use of an independent consultant underscores its commitment to transparent and professional reporting.