Midnight Sun Announces Exploration Progress at Solwezi

Vancouver, British Columbia--(Newsfile Corp. - May 21, 2025) - Midnight Sun Mining Corp. (TSXV: MMA) (OTC Pink: MDNGF) ("Midnight Sun" or the "Company") presents a progress update regarding the previously announced 2025 phase one exploration campaign. Work is underway on all three key targets and is expected to continue across several phases throughout the work season to rapidly advance the Company's Solwezi Project in Zambia.

Update summaries provided for each target, with detailed description provided below:

Dumbwa: Dipole-Dipole Induced Polarization ("IP") Survey is ~30% complete.

Kazhiba: Diamond drill contractor engaged, drill pads currently being cleared and prepared. Drilling at the Kazhiba Target 2 sulphide target is expected to begin May 26^th.

Mitu: Partial Ionic Leach Survey is ~46% complete.

Midnight Sun's President & CEO, Al Fabbro, states: "We recently announced the commencement of our exploration program, designed and led by our Chief Operating Officer, Dr. Kevin Bonel. This campaign aims to advance all three of our key target areas from conceptual or early-stage discovery to well-defined assets worthy of significant development investment—within just a few months.

"We believe these targets have the potential to evolve into world-class copper discoveries. Dr. Bonel's approach is disciplined, methodical, and proven — the same strategy he successfully applied at Barrick's Lumwana Mine, transforming it from a Tier 2 asset into Zambia's latest Tier 1 copper projectⁱ.

"This marks the first time our targets are being explored with such a rigorous and comprehensive methodology. We are confident in the potential of our assets, and with this program underway we are firmly positioned to demonstrate our commitment to unlocking significant value and delivering transformative discoveries."

Dumbwa Program Progress

Following comprehensive geological mapping and site preparation over the 20-kilometre strike length of the Dumbwa copper-in-soil anomaly, 24 of the 34 planned geophysical lines have been cleared, mapped, and prepared for surveying. Dipole-dipole IP has been completed on ten lines.

This survey is designed to generate a detailed subsurface profile, including dip direction, depth of the targeted geology, and the relationship between surface geochemical anomalies and potential sulphide copper mineralization at depth. The data generated from the IP survey will guide highly targeted drilling with the program expected to commence shortly after IP results are received.