Medaro Mining Announces High-Grade Copper and Gold Assay Results from Sampling Program at the Bastnas Project in Sweden

• Initial results also highlight encouraging rare earth element (REE) potential, with several samples returning strongly elevated Ce-La-Y values
• High-resolution drone magnetic survey underway

Vancouver, British Columbia--(Newsfile Corp. - May 28, 2026) - Medaro Mining Corp. (CSE: MEDA) (OTCID: MEDAF) (FSE: 1ZY) ("Medaro" or the "Company") is pleased to announce the receipt of highly encouraging results from a rock chip sampling program from its Bastnäs Project (the "Project") which is located in the prolific Bergslagen Mining District in central Sweden. Assay results have been received from ALS Scandinavia Laboratory for the first 97 samples out of more than 200 surface samples taken during the current field program. In parallel, a high-resolution drone magnetic survey is currently underway.

Sampling occurred primarily within the 1,130 hectare extent of the Bastnäs 100 and 200 permits which include numerous underground and open pit iron and copper workings, including the more modern Bäckegruvan magnetite operations closed in the late 1970s. The mineral exploration permits also extend over the world-famous Bastnäs historical mine workings, where rare earth elements cerium and lanthanum were first discovered in the mineral cerite during the 19^th century. The purpose of this surface sampling program and the drone magnetic survey is to determine the overall copper, gold and REE prospectivity as a foundation for future exploration programs and drill targeting.

Copper and Gold Highlights
High-grade gold and copper assay results were returned from rock chip samples from multiple locations across the Project. The best reported assay results from selected waste rock at each cluster of historical mines are as follows:

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High-grade copper results were found in samples visibly rich in chalcopyrite. Although some high-grade gold results are found directly with high-grade copper results, the variable Cu:Au ratio suggests a more complex pattern of mineralization history. The table above shows that high grade gold is not only associated with the old Bastnäs Mines at Area G (Gamla Bastnäsgruvor) but also with the copper-rich sulphide orebodies mined around the Persgruvan area (Area D).

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