Mr. Glenn Mullan reports

CLEGHORN ACQUIRES NEW PROPERTY IN GASPE, QUEBEC - ROCCO COPPER PROSPECT

Cleghorn Minerals Ltd. has acquired, by map designation (staking), 73 claims (4,156 hectares) in NTS Map Sheet 22A/11.

The Gaspe porphyry copper-skarn project (henceforth the Rocco copper prospect) is located in the Gaspe Peninsula of eastern Quebec (Gaspe region), approximately 100 kilometres north of Port-Daniel or 100 km southeast of Murdochville, approximately 830 km northeast of Montreal, Que. Vehicular access is available through a dense network of forestry roads in the area.

The claims were acquired for their geological potential, considered by management to be prospective for the discovery of a porphyry copper-skarn mineralized system.

The Rocco copper prospect encompasses sedimentary rocks (shales and calcareous mudrocks of the Ordovician Burnt Jam Brook and White Head formations), separated from the calcareous mudrock of the Devonian Fortin group and Cap Bon Ami formation by the Grande-Riviere fault and injected by numerous porphyry dikes of the Lemieux intrusive suite, Siluro-Devonian in age, and similar to the porphyry dikes associated with the Murdochville porphyry system, host to the Gaspe Copper Mountain mine.

No formal mineral occurrences at the Rocco copper prospect have been reported in government files, although mentions of malachite and other copper minerals are reported in historical prospecting reports. However, seven copper mineralized occurrences are reported in the adjacent Lac McKay basaltic units, currently held by a third party. Similarities with the geological environment of the classic copper-molybdenum porphyry deposit of the Gaspe Copper Mountain mine are numerous, including the calcareous mudstone injected by felsic porphyry dikes.

The Gaspe Copper Mountain mine was operated by Noranda Mines Inc. from 1955 to 1999 and was, at that period, the largest copper producing mine in Quebec with a total of 150 million tons at 0.87 per cent copper, or in excess of one million tons of copper anodes. This deposit is currently under intensive re-evaluation by Osisko Metals Inc., which reported, in April, 2026, an updated resource more than doubling the previously known copper content. Gaspe is now estimated to hold 1.83 billion tonnes (measured and indicated) grading 0.27 per cent copper (10.77 billion pounds copper), 0.017 per cent molybdenum (673.2 million pounds molybdenum) and 1.57 grams per tonne of silver (92.8 million ounces silver). Inferred resources were also established at 238.8 million tonnes grading 0.41 per cent copper (2.16 billion pounds copper), 0.016 per cent molybdenum (82.9 million pounds molybdenum) and 1.88 grams per tonne of silver (14.5 million ounces silver).

Information disclosed from nearby properties is not necessarily indicative to the mineralization on the company's property.

Cleghorn Minerals is currently planning a thorough compilation of historical geology, geochemistry and geophysics, to then be followed with an inaugural field prospecting exploration program for the fall of 2026. IOS Geosciences, a well-established geological consulting group from Saguenay, Que., has been mandated to execute said work program.

Qualified person

Rejean Girard, PGeo (OGQ No. 00521), geologist and president of IOS Geosciences, is the designated qualified person for the purposes of National Instrument 43-101 that reviewed and approved the technical content of this release. Mr. Girard has nearly 45 years of experience in mineral exploration in Eastern Canada, primarily as consultant on a wide variety of commodities and geological environments.

About Cleghorn Minerals Ltd.

Cleghorn is a junior mineral exploration company with a 100-per-cent interest in the Meech Lake-Matachewan prospect, a property located in Northeastern Ontario, and a 100-per-cent interest in the newly acquired Rocco copper prospect in the Gaspe region of Quebec.

We seek Safe Harbor.