District Completes Airborne MobileMT Survey at the Viken Property and Commences MobileMT at the Alum Shale Properties in Sweden

Vancouver, British Columbia--(Newsfile Corp. - June 24, 2025) - District Metals Corp. (TSXV: DMX) (Nasdaq First North: DMXSE SDB) (OTCQB: DMXCF) (FSE: DFPP); ("District" or the "Company") is pleased to announce the completion of a helicopter-borne Mobile MagnetoTellurics System ("MobileMT") survey at the Viken Property, and now the MobileMT system has been moved to the Alum Shale Properties (Figure 1) located in the Jämtland and Västerbottens Counties, north-central Sweden.

The MobileMT survey initially commenced at the Viken Property in on June 3, 2025. Preliminary interpretations indicate that the MobileMT survey has successfully mapped out the mineralized Alum Shale host rock of the Viken Energy Metals Deposit, which has validated this geophysical survey for further use at the Company's Alum Shale Properties. The final results and interpretations of the MobileMT survey on the Viken Property will likely be released in Q3 2025.

The MobileMT survey at the Alum Shale Properties will comprise approximately 2,700 line kilometers at 200 meter line spacing, and will aim to identify potential mineralized Alum Shale for follow up confirmation by drilling. The optimal target for further follow up work will comprise the shallowest and thickest parts of mineralized Alum Shale. The MobileMT survey has successfully mapped out the mineralized Alum Shale in detail at the Viken Energy Metals Deposit, and this geophysical signature will be utilized for identifying drill targets at the Alum Shale Properties.

Garrett Ainsworth, CEO of District, commented: "Our preliminary confirmation that MobileMT has effectively mapped out the mineralized Alum Shale at the Viken Energy Metals Deposit is a technological breakthrough for exploration of mineralized Alum Shale in Sweden. The initial interpretations of the MobileMT results at the Viken Deposit clearly show the depth to and thickness of the Alum Shale that corroborates with geological data from historical drill holes. In an Alum Shale deposit mining scenario, a shallow and thick deposit is important to optimize the strip ratio and deliver the best economic metrics. We will use this recently identified geophysical signature to prioritize drill targets outside of the 2025 Viken Deposit mineral resource estimate and on the Alum Shale Properties."