Mr. David Ryan reports

GLENSTAR COMPLETES SUCCESSFUL INITIAL DRILLING AT WILDHORSE PROJECT IN NEVADA

The phase 1 reverse circulation drill program at Glenstar Minerals Inc.'s Wildhorse project in Mineral county, Nevada (see news release dated April 14, 2026), has been completed, with a total of six reverse circulation drill holes being completed at the Rattlesnake zone, in addition to four holes previously reported at the Coca Cola zone (see news release dated April 29, 2026).

Each of these six holes explored the Rattlesnake zone's downdip extension 85 to 110 metres east of outcropping mineralization, which was worked by a series of historic decline developments. All holes drilled showed intervals of strong alteration with quartz veinlets contained within a strongly foliated metasedimentary host rock. Contacts between this receptive host rock and a feldspar porphyry intrusive rock are particularly well altered, with visual mineralization containing abundant oxide minerals and quartz veinlet swarms. The overall plan of the drilling at Rattlesnake was to target the area believed to be the core of a high-grade polymetallic system that previously showed promising results.

This style of mineralization is being intersected both at depths of 100 to 150 metres downhole, as well as at near-surface positions on hole RTSRC-3 and hole RTSRC-6, where strong quartz veinlet development is present at zero to 25 metres downhole. The visual results of the drilling at Rattlesnake continue to indicate strong potential for a polymetallic resource discovery in both near surface and in the downdip extensions of the historic working positions. As a result of observations in the field during the drill program, the total number of feet drilled at Wildhorse increased from a planned 3,500 feet to 4,300 feet.

Project geologist and exploration manager Bob Marvin stated: "The drilling program at the Wildhorse project went as well as could have been expected, and we are very pleased to have intersected what appears to be robust area-wide occurrences of polysulphide mineralization in the Rattlesnake zone. Hopefully the assay numbers will confirm the extent and degree of mineralization that visual observations suggest is considerable and widespread."

Project background

The Wildhorse property is composed of 89 mineral claims, representing 1,780 acres (720 hectares) in Mineral county, Nevada, and was initially targeted after compilation of all available data, including notes of a 1975 field examination contained in the Anaconda Company archives housed at the University of Wyoming. The claims show historical workings that appear to date from the late 1800s and early 1900s. Other claim stakes that the geological team discovered on the property indicate the last time the area was staked was 2011; however, these claims were never registered with the Bureau of Land Management. Preliminary geological assessment of the claims and the area in general indicate there are a series of east-dipping mineralized zones. Initial field examination of the property identified and sampled a quartz veinlet zone containing in excess of one gram per tonne gold, 1 per cent copper and 6,100 parts per million of antimony. It was also reported that outcropping zones also contain bismuth and tungsten, which point to a focused intrusive source for the epidote skarn alteration and polymetallic system (see news release dated Feb. 11, 2025).

About Glenstar Minerals Inc.

Glenstar is a mineral exploration company with a focus on polymetallic minerals. These elements are classified as critical minerals and are essential in the manufacturing of sophisticated electronics and other vital energy technologies. The company's mission is to leverage its knowledge and connections to explore, acquire and develop critical mineral and energy metal properties throughout the world.

Glenstar's shares trade on the Canadian Securities Exchange under the symbol GSTR, on the Frankfurt Stock Exchange under the symbol VO20 and on the Over-the-Counter market (OTCQB) in the United States under the symbol GSTRF.

Robert Marvin, PGeo (Ontario), is the qualified person as defined by National Instrument 43-101 and is the independent consulting geologist for Glenstar, who has examined the Green Monster and Wildhorse properties on the ground numerous times since 2022 and 2024, respectively. All fieldwork relating to geologic observations and sampling as reported herein has been directly overseen by Mr. Marvin, who supervised the preparation of, and has reviewed and approved, the technical information in this release.

We seek Safe Harbor.