Midnight Sun Continues Rapid Strike Expansion at Dumbwa; Now 6.7 Kilometres of Near-Surface Copper Mineralization

Midnight Sun Mining Corp. reported additional drill results from 77 holes at its wholly-owned Dumbwa copper deposit in Zambia, bringing the total program to over 260 holes and 56,855 meters. The company now confirms continuous near-surface sulphide copper mineralization over 6.7 km of strike, an increase from 5.3 km in the previous update on May 13, 2026. Five drill rigs are continuing to step out northward and laterally.

After passing a structural disruption zone, the high-grade central corridor re-emerges, with the latest northernmost holes showing thick, higher-grade intervals. Selected intercepts include:

• 0.42% Cu over 21.6 m
• 0.51% Cu over 13.7 m
• Wide zones of 0.18–0.27% Cu

These results outline a system that is 6.7 km long, 600–1,000 m wide, and over 200 m deep. Phase One drilling, with approximately 12,500 m remaining, is on pace to conclude in Q3 2026, after which the company expects to have tested the initial 11.5-km target.

Midnight Sun Mining Corp. (MMA) has released an update that serves as a logical, incremental extension of its drilling program, which has been systematically reported since late-2025. Strike growth has increased from 5.3 km to 6.7 km, demonstrating scale, although the grades reported in this batch are modest, mostly sub-0.5% Cu, and largely in line with the deposit’s previously established character as a low-grade, bulk-tonnage system.

The re-emergence of a higher-grade corridor is geologically encouraging, yet the actual assays of 0.42% over 21.6 m are not materially stronger than what the market has already seen. No maiden resource estimate for Dumbwa has been released, and the project remains at an early definition stage. Given that the company had already signaled continued drilling and a target of 11.5 km, the news provides no new positive surprise that would alter the investment thesis.

The stock price has trended steadily downward from ~$1.42 in mid-May to $0.66 just before the release, suggesting the market had already priced in modest expectations. Consequently, the update falls into the category of routine, positive-but-expected operational news.

Midnight Sun Mining Corp. is a Canadian-listed copper explorer focused on the Solwezi Copper Project in the Domes Region of Zambia. The company’s flagship Dumbwa target is a basement-hosted, strain-controlled sulphide copper system that it compares to Barrick’s Lumwana mine, which holds 1.62 billion tonnes at 0.52% copper. Drilling has outlined continuous near-surface mineralization over more than 6 km of strike, with widths of 600–1,000 m and depths exceeding 200 m. No resource estimate has yet been published for Dumbwa.

The company also owns the Kazhiba Main oxide copper deposit, for which a maiden indicated resource of 2.33 million tonnes at 1.41% copper was released in January 2026. Management intends to monetize Kazhiba to self-fund Dumbwa’s exploration. The Solwezi project benefits from its proximity to First Quantum’s Kansanshi mine, located approximately 6.8 km away, as well as other established infrastructure.