High-Resolution Ground Magnetics Unlocks New Drill Targets at Dumbwa

Company now extending magnetic survey over entire Dumbwa anomaly

Vancouver, British Columbia, August 6, 2026 – Midnight Sun Mining Corp. (TSXV: MMA / OTCQX: MDNGF) (“Midnight Sun” or the “Company”) is pleased to announce that an initial high-resolution ground magnetic survey on its wholly owned Dumbwa copper deposit, located in Solwezi, Zambia, has identified multiple new exploration targets outside the previously defined and drilled mineralized corridor.

The magnetic survey covered an area of approximately 2.7 kilometres (“km”) by 2.5 km in the northern portion of Dumbwa’s Central Mineralized Block. Data was collected along north-south survey lines spaced 100 metres (“m”) apart, with east-west tie lines spaced at 250 m intervals (Figures 1 and 2).

The survey successfully identified distinct magnetic signatures associated with drill confirmed copper mineralization. These same signatures appear in areas off the known mineralized corridor that had not been previously identified or tested yet. Visuals from initial testing of one such newly identified ground magnetic anomaly appears to support the correlation. Based on these results, Midnight Sun is extending the high-resolution magnetic survey across the full ~20 km copper-in-soil anomaly.

The expanded survey is designed to both refine existing targets and identify additional prospective areas of mineralization along parallel and sympathetic structural corridors with potential to host basement-hosted sulphide copper mineralization.

Midnight Sun’s COO, Kevin Bonel, states, “We are encouraged by how effectively this ground magnetic survey has enhanced our understanding of the structural architecture of the Dumbwa deposit and its relationship to higher-grade mineralized zones. Importantly, the survey has allowed us to ‘fingerprint’ the magnetic signature associated with the Central higher-grade block and identify several analogous targets east of the main mineralized corridor. These targets will be prioritised for future drill testing and provide a compelling opportunity to identify significant additional copper mineralization and further expand Dumbwa’s rapidly growing footprint.”

Magnetic Survey Identifies New Drill Targets
The initial survey produced two key findings. First, the survey identified a distinctive pattern of rapidly changing magnetic intensity within the northern portion of the Central Mineralized Block, an area that has previously returned several significant copper intercepts, including:

  • DBW-25-148: 21.0 m at 0.33% Cu
  • DBW-25-149: 17.8 m at 0.85% Cu, and 21.4 m at 0.38% Cu
  • DBW-26-123: 80.0 m at 0.39% Cu

This magnetic signature is interpreted to be associated with the geological and structural setting that hosts copper sulphide mineralization at Dumbwa and may provide a valuable exploration tool for identifying additional areas of prospectivity.

Second, the survey allows for the better identification of late-stage faulting that may offset mineralization across Dumbwa. Incorporating this structural information into drill planning is expected to improve the positioning of future drill collars for more effective testing of the main Dumbwa mineralized corridor.

The survey has already generated two new, untested targets for basement-hosted sulphide copper mineralization. These targets are located approximately 1 – 1.2 km east of the main Dumbwa mineralized corridor and display magnetic characteristics similar to those observed in areas that have already returned higher-grade copper mineralization.

Drilling to test these targets is planned as part of Dumbwa’s Phase 2 exploration program, scheduled to begin in Q3 2026 (Figures 3-6).

The survey has also identified a similar magnetic pattern west of the main Dumbwa mineralized corridor. This may represent an additional prospective structural corridor, and targets in this area are currently being evaluated for potential inclusion in the Phase 2 exploration program.

Geological Interpretation
The distinct, rapidly changing magnetic patterns observed within the Central Mineralized Block and at the newly identified targets are interpreted to reflect variations in the underlying lithology and structural architecture.
Competent feldspar pegmatites and amphibolites, which commonly contain higher concentrations of magnetite, are interpreted to define the margins of high-strain domains. These high-strain domains contain lower-magnetite schists that are interpreted to host the copper sulphide mineralization at Dumbwa.

Within the survey area, positive magnetic anomalies also show a spatial relationship with the mineralized structural corridor that constrains the known Dumbwa sulphide copper occurrences.

In addition, preliminary interpretation indicates a positive relationship between magnetic intensity and zones of more intense copper sulphide mineralization observed in drill core and assay results. This relationship is most apparent in the analytical signal data but can also be observed in total magnetic intensity, first vertical derivative, and second vertical derivative datasets.

These results support the Company’s previous interpretation that the Dumbwa mineralized corridor is associated with a north-south oriented positive magnetic anomaly. The high-resolution magnetic survey may therefore provide an effective tool for refining drill targeting and guiding future exploration along the full ~20 km strike extent of the Dumbwa anomaly.

Diurnal correction was done using a fixed magnetometer and two mobile units were employed to acquire magnetic data within the survey area.

 

Figure 1. Location of High Resolution Ground Magnetic Survey over the Dumbwa Mineralized Unit. The dashed outline is the magnetic unit identified that relates directly to mineralization.

 

Figure 2. Analytical Signal ground magnetics showing the strong relationship of high magnetic readings and higher grade mineralization in the Central Block. Note the two very similar looking target areas.

 

Figure 3. Total Magnetic Intensity ground magnetics showing the strong relationship of high magnetic readings and higher grade mineralization in the Central Block. Note the two very similar looking target areas.

Qualified Person: Darin Labrenz, P.Geo., a consulting geologist for the Company and Qualified Person under NI 43-101, has reviewed and approved the technical data and contents of this release.

About Midnight Sun
Midnight Sun is rapidly advancing the Solwezi Copper Project, with a focus on our flagship Dumbwa copper deposit. The Project is located near the town of Solwezi in the heart of the Zambia–Congo Copperbelt, the world’s second-largest copper-producing region. This prolific mining district is renowned for hosting multiple major copper deposits, and benefits from excellent infrastructure, an established mining workforce, and a long history of successful production.

The Solwezi Copper Project is surrounded by producing copper mines, including the geologically similar Lumwana mine just west of our project and First Quantum’s Kansanshi mine – Africa’s largest integrated metallurgical processing facility, approximately 6 kilometres east of the company’s recently announced Kazhiba Oxide Resource. This highly favourable location highlights the district-scale potential of Midnight Sun’s land package.

The Dumbwa copper deposit underlays a robust 20-kilometre copper-in-soil anomaly, and ongoing drilling has demonstrated strong geological similarities to the nearby Lumwana mine, underscoring the potential scale of this new copper system.

Led by an experienced geological team with a proven track record of major discoveries in the Zambia–Congo Copperbelt and globally, Midnight Sun’s goal is to delineate Zambia’s next generational copper deposit.

 

ON BEHALF OF THE BOARD OF MIDNIGHT SUN MINING CORP.

Al Fabbro
President & CEO

For Further Information Contact:
Adrian O’Brien
VP Business Development and Communications
Tel: +1 604 809 6890
Em: adrian@midnightsunmining.com

 

NEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICES PROVIDER (AS THAT TERM IS DEFINED IN THE POLICIES OF THE TSX VENTURE EXCHANGE) ACCEPTS RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THIS NEWS RELEASE.

This news release contains “forward-looking statements” within the meaning of the applicable Canadian securities legislation that are based on expectations, estimates, assumptions, geological theories, and projections as at the date of this news release. The information in this news release about any information herein that is not a historical fact may be “forward looking statements.” Any statement that involves discussions with respect to predictions, expectations, beliefs, plans, projections, objectives, assumptions, future events or performance (which may, but not always, include phrases such as “anticipates”, “expects”, “plans”, “scheduled”, “believed” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking statements and are intended to identify forward-looking statements.

Although the forward-looking statements contained in this news release are based upon what management believes, or believed at the time, to be reasonable assumptions, the Company cannot assure readers that actual results will be consistent with such forward-looking statements, as there may be other factors that cause results not to be as anticipated, estimated or intended. Such factors include, among others, risks relating to the timing and ability of the Company to obtain and the timing of the approval of relevant regulatory bodies, if at all; risks relating to property interests; risks related to access to the project; risks inherent in mineral exploration, including the fact that any particular phase of exploration may be unsuccessful; the availability of contractors; geo-political risks; the global economic climate; metal prices; environmental risks; political risks; and community and non-governmental actions. Further to this, geological similarities or characteristics are not guarantees or certainties of successful exploration. Neither the Company nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking statements. The Company does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

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

Highlights include: 21.64m @ 0.42% Cu, 13.67m @ 0.51% Cu, and 25m @ 0.38% Cu

 

Vancouver, British Columbia, June 29, 2026 – Midnight Sun Mining Corp. (TSXV: MMA / OTCQX: MDNGF) (“Midnight Sun” or the “Company”) is pleased to report additional results from 77 holes on its wholly owned Dumbwa copper deposit, located in Solwezi, Zambia. Drilling has now surpassed 260 holes and 56,855 metres (“m”), confirming continuous near-surface sulphide copper mineralization over 6.7 kilometres (“km”) of strike at Dumbwa.  Five drill rigs continue to expand the deposit northward along strike and laterally to the east and west of known mineralization.

Highlights of Drilling include:

  • DBW-26-200 intercepted 0.42% Cu over 21.6m.
  • DBW-26-165 intercepted 0.51% Cu over 13.7m.
  • DBW-26-150 intercepted 0.38% Cu over 25.0m.

Midnight Sun’s President and CEO, Al Fabbro, states, “To date, we have demonstrated that Dumbwa is, at a minimum, a 6,700 metre long and 600 metre to 1,000 metre wide, north-south, strain-controlled copper system.  It is typically near, or at, surface, and extends to greater than 200 metres depth. It features a high-grade, central corridor ranging in width from 100 to 600 metres within a broader mineralized shell which can exceed 1,000 metres in width.

Our initial, discovery drilling is broadly spaced with holes positioned 50 to 100 metres apart on each of the east-west lines, with the lines spaced 100 to 200 metres apart north to south. As a result, on any individual line/section, it is expected that only 2 or 3 holes are positioned within the highest-grade corridor, while a higher percentage of holes are positioned in the lower-grade shells. It is evident from our work to date; the higher-grade core shows strong grades and continuity within individual segments of the deposit.

As our drilling has progressed north of the disruption zone we just passed through, we are again seeing good development of visually strong copper mineralization and the northernmost holes we have reported today demonstrate the return of thick, higher-grade mineralization within the central corridor of the deposit.”

The Company will host a technical webinar with Midnight Sun’s COO, Dr. Kevin Bonel, to discuss the results announced in this news release on Tuesday, June 30th, 2026, at 10am PST. You can access the webinar via the link provided here: Webinar Link

 

Drilling Highlights Table:

Hole ID   From (m) To (m) Interval (m) Cu (%)
DBW-26-200 0.36 22.00 21.64 0.42
DBW-26-180 0.00 21.00 21.00 0.21
DBW-26-177 3.50 29.00 25.50 0.18
DBW-26-176 3.00 27.30 24.30 0.27
and 35.00 53.70 18.70 0.27
DBW-26-165 19.33 33.00 13.67 0.51
DBW-26-159 144.00 172.00 28.00 0.25
DBW-26-150 97.00 122.00 25.00 0.38
and 151.8 174.00 22.20 0.25
and 195.00 209.00 14.00 0.38
DBW-26-142 197.07 215.00 17.93 0.23
and 218.75 231.00 12.25 0.26
  • Assay results based on four-acid digest, ICP-OES finish. Intervals listed are based on drilling intervals and therefore are considered relative rather than true widths.
  • The full table of assays including locations is available on the Company’s website and can be accessed through this link: Dumbwa Drill Hole Location and Assay Table.

 

Phase One Drilling Progress

Drilling has now intersected continuous near-surface sulphide copper mineralization over 6.7km of strike at Dumbwa (see Figures 1, 2, 3 and 4 below). Assays have been received for the first ~5.2km of the drilled trend, and five drill rigs are continuing northward along strike and laterally to the east and west of known mineralization.

Recent drilling has focused on the continued expansion of the Dumbwa Deposit northward, while also refining the lateral boundaries of mineralization, which has resulted in an additional 1.4km of strike extension to the north. This drilling intersects the same geology that characterizes Dumbwa, comprising flat – to gently east-dipping biotite and muscovite-biotite schists hosting sulphide copper mineralization.  Importantly, the higher-grade core of the north-south-trending Dumbwa shear zone has re-emerged beyond the northwest-southeast structural corridor, where weaker schist development and associated grade attenuation had previously been encountered. Mineralization remains open along the full extent of the copper-in-soil anomaly, in select areas to the east and west, and at depth.

Approximately 12,500m of Phase One drilling remains to complete the planned testing of the initial 11.5km strike extent, with the program expected to conclude in Q3 2026.

 

The Strategy Behind Every Drill Hole

The objective has been to define the Dumbwa deposit quickly, methodically, and completely. From the outset, the drill program has been designed to test the full mineralized envelope, which includes the higher-grade core as well as the surrounding lower-grade mineralization, in order to define the overall dimensions and continuity of the system.

To achieve this, drill fences are spaced approximately every 100 to 200m along the 20km strike of the target area, with drill holes positioned every 50 metres across each east-west fence. Beginning at the southern property boundary, drilling has progressively advanced northward, systematically building the deposit one fence at a time.

This approach has now defined a mineralized system extending approximately 6.7km in strike length. The central higher-grade zone is typically between 200 and 600m wide with the total mineralized envelope commonly extending from 1.0 to 1.5km across (see Figures 3 and 4 below).

As a result, each drill fence typically contains only two to three holes within the higher-grade core, while many holes test the surrounding lower-grade mineralization. This is intentional. Demonstrating the full width and continuity of the mineralized system requires drilling to its margins rather than focusing exclusively on the higher-grade centre.

Concentration only on the higher-grade core would result in the deposit remaining open to the east and west, leaving its true dimensions undefined. By systematically drilling the entire mineralized corridor, we are establishing both the geometry of the higher-grade core and the full extent of the broader mineralized system.

This context is critical when interpreting individual assay results. Viewed as a table of drill intersections, many holes appear to return lower grades. Viewed in their geological context, however, those same holes are defining the boundaries of a large, continuous mineralized system while progressively delineating the significant higher-grade core within it.

 

Figure 1: Dumbwa drilling to date, plotted on 11.5km Phase One copper-in-soil anomaly, target area.

Figure 2: Dumbwa drilling to date, magnified to show current 5.3km drilled strike extent, plotted on Phase One copper-in-soil anomaly, target area.

Figure 3: Assay grade shells superimposed on the Dumba soil anomaly showing the correlation between high soil anomalies and medium to high grade mineralised intercepts at Dumbwa. Drilling continues to follow the soil anomaly north.

Figure 4: 11.5 kilometre Phase One Target area – Assay grade shells superimposed on the Dumba soil anomaly showing the correlation between high soil anomalies and medium to high grade mineralised intercepts at Dumbwa. Drilling continues to follow the soil anomaly north.

 

Quality Control/Quality Assurance

Drilling was conducted using a conventional diamond drilling rig and drill core was captured for the entirety of each hole and placed into plastic core trays. All drill holes were cored in PQ until stable ground was achieved and then reduced to HQ size for the remainder of each hole. Sampling was based on visible copper mineralisation, and sample intervals honoured any important lithological boundaries. Core was then cut in house using a diamond saw and the right half of core was placed into a 200-micron plastic bag, assigned a unique sample number, and recorded into GeoSpark logging system. Samples always remained under the supervision of Midnight Sun staff to maintain chain of custody. Since March 2026, a total of 14,730 samples were then delivered to SGS Labs located in Kalulushi, Zambia, a fully accredited laboratory. Once received, the samples were sorted, dried, crushed, and pulverized (SGS code PRP90) followed by four-acid digest with ICP-OES finish (SGS Code ICP42S). Copper range of detection is 0.01-10%. Additionally, since April 2026 a total of 6,589 samples have been submitted to Intertek laboratory in Kitwe for sample preparation. Sample pulps were then shipped to Intertek Perth, Western Australia for analysis by four-acid digest with ICP-OES finish. Midnight Sun follows an in-house QA/QC program that consists of a random insertion every 10th sample of either a coarse blank, fine blank, coarse duplicate, fine duplicate, or Certified Reference Material (standards).

Qualified Person: Darin Labrenz, P.Geo., a consulting geologist for the Company and Qualified Person under NI 43-101, has reviewed and approved the technical data and contents of this release.

 

About Midnight Sun

Midnight Sun is rapidly advancing the Solwezi Copper Project, with a focus on our flagship Dumbwa copper deposit. The Project is located near the town of Solwezi in the heart of the Zambia–Congo Copperbelt, the world’s second-largest copper-producing region. This prolific mining district is renowned for hosting multiple major copper deposits, and benefits from excellent infrastructure, an established mining workforce, and a long history of successful production.

The Solwezi Copper Project is surrounded by producing copper mines, including the geologically similar Lumwana mine just west of our project and First Quantum’s Kansanshi mine – Africa’s largest integrated metallurgical processing facility, approximately 6 kilometres east of the company’s recently announced Kazhiba Oxide Resource. This highly favourable location highlights the district-scale potential of Midnight Sun’s land package.

The Dumbwa copper deposit underlays a robust 20-kilometre copper-in-soil anomaly, and ongoing drilling has demonstrated strong geological similarities to the nearby Lumwana mine, underscoring the potential scale of this new copper system.

Led by an experienced geological team with a proven track record of major discoveries in the Zambia–Congo Copperbelt and globally, Midnight Sun’s goal is to delineate Zambia’s next generational copper deposit.

 

ON BEHALF OF THE BOARD OF MIDNIGHT SUN MINING CORP.

Al Fabbro

President & CEO

 

For Further Information Contact:

Adrian O’Brien

VP Business Development and Communications

Tel: +1 604 809 6890

Em: adrian@midnightsunmining.com

 

NEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICES PROVIDER (AS THAT TERM IS DEFINED IN THE POLICIES OF THE TSX VENTURE EXCHANGE) ACCEPTS RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THIS NEWS RELEASE.

 

This news release contains “forward-looking statements” within the meaning of the applicable Canadian securities legislation that are based on expectations, estimates, assumptions, geological theories, and projections as at the date of this news release. The information in this news release about any information herein that is not a historical fact may be “forward looking statements.” Any statement that involves discussions with respect to predictions, expectations, beliefs, plans, projections, objectives, assumptions, future events or performance (which may, but not always, include phrases such as “anticipates”, “expects”, “plans”, “scheduled”, “believed” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking statements and are intended to identify forward-looking statements.

 

Although the forward-looking statements contained in this news release are based upon what management believes, or believed at the time, to be reasonable assumptions, the Company cannot assure readers that actual results will be consistent with such forward-looking statements, as there may be other factors that cause results not to be as anticipated, estimated or intended. Such factors include, among others, risks relating to the timing and ability of the Company to obtain and the timing of the approval of relevant regulatory bodies, if at all; risks relating to property interests; risks related to access to the project; risks inherent in mineral exploration, including the fact that any particular phase of exploration may be unsuccessful; the availability of contractors; geo-political risks; the global economic climate; metal prices; environmental risks; political risks; and community and non-governmental actions. Further to this, geological similarities or characteristics are not guarantees or certainties of successful exploration. Neither the Company nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking statements. The Company does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

 

Midnight Sun Invites Shareholders to Dumbwa Technical Webinar – May 19th 2026, at 9am Pacific

Technical Presentation hosted by COO Dr. Kevin Bonel

Vancouver, British Columbia, May 14, 2026 – Midnight Sun Mining Corp. (TSXV: MMA / OTCQX: MDNGF) (“Midnight Sun” or the “Company”) is pleased to invite shareholders and interested investors to an upcoming technical webinar focused on the Company’s recent drill results and ongoing exploration progress at the Dumbwa copper deposit.

The webinar will feature a detailed technical presentation by Chief Operating Officer, Kevin Bonel, who will provide additional geological context and interpretation related to the Company’s latest drill results, exploration model, and the evolving understanding of mineralization across the project.

Management will also discuss recent operational developments, current drilling activities, and the Company’s exploration strategy moving forward.

The webinar will conclude with a live question-and-answer session, during which shareholders and participants will have the opportunity to engage directly with management.

Webinar Details

Participants are encouraged to register in advance. A replay of the webinar will be made available on the Company’s website following the event.
Date: Tuesday, May 19th, 2026
Time: 9:00am Pacific Time

About Midnight Sun

Midnight Sun is rapidly advancing the Solwezi Copper Project, with a focus on our flagship Dumbwa copper deposit. The Project is located near the town of Solwezi in the heart of the Zambia–Congo Copperbelt, the world’s second-largest copper producing region. This prolific mining district is renowned for hosting multiple major copper deposits, and benefits from excellent infrastructure, an established mining workforce, and a long history of successful production.

The Solwezi Copper Project is surrounded by producing copper mines, including the geologically similar Lumwana mine just west of our project and First Quantum’s Kansanshi mine – Africa’s largest integrated metallurgical processing facility, approximately 6 kilometres east of the company’s recently announced Kazhiba Oxide Resource. This highly favourable location highlights the district-scale potential of Midnight Sun’s land package.

The Dumbwa copper deposit underlays a robust 20-kilometre copper-in-soil anomaly, and ongoing drilling has demonstrated strong geological similarities to the nearby Lumwana mine, underscoring the potential scale of this new copper system.

Led by an experienced geological team with a proven track record of major discoveries in the Zambia–Congo Copperbelt and globally, Midnight Sun’s goal is to delineate Zambia’s next generational copper deposit.

ON BEHALF OF THE BOARD OF MIDNIGHT SUN MINING CORP.

Al Fabbro

President & CEO

For Further Information Contact:
Adrian O’Brien
VP Business Development and Communications
Tel: +1 604 809 6890
Em: adrian@midnightsunmining.com

NEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICES PROVIDER (AS THAT TERM IS DEFINED IN THE POLICIES OF THE TSX VENTURE EXCHANGE) ACCEPTS RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THIS NEWS RELEASE.

Midnight Sun Extends Dumbwa Copper Deposit to Over 5.3 Kilometres; Remains Open Along Strike With Drilling Ongoing

Results include: 93m @ 0.40% Cu, 80m @ 0.39% Cu, 44m @ 0.53% Cu, and 36m @ 0.58% Cu

 

Vancouver, British Columbia, May 13, 2026 – Midnight Sun Mining Corp. (TSXV: MMA / OTCQX: MDNGF) (“Midnight Sun” or the “Company”) is pleased to report results from drillholes completed on its wholly owned Dumbwa copper deposit, located in Solwezi, Zambia. Dumbwa is in the southeast portion of the Company’s Solwezi Project, centered in the heart of the prolific Domes Region – flanked to the north by First Quantum’s Kansanshi mine and west by Barrick’s Lumwana mine.

Drilling has now surpassed 200 holes for a total of over 42,000 metres (“m”) and results to date confirm near surface copper sulphide mineralisation, over a continuous strike length of 5.3 kilometres (“km”) (see Figures 2 and 3), with assays received for the first ~4km of drilled strike. The initial discovery and delineation drill program continues with 4 rigs focussed on growing the deposit to the north along strike and to extend previously drilled mineralisation east and west. Quality control issues related to laboratory analysis have been resolved, and the related backlog of assays are now largely caught up (see below).

The Company plans to host a technical webinar with Midnight Sun’s COO, Dr. Kevin Bonel, to discuss the results announced in this news release. Details will be included in a separate news release.

 

Top 20 Drill Highlights:

Hole ID   From (m) To (m) Interval (m) Cu (%)
DBW-25-099R 58 60 2 0.54
152 245 93 0.40
DBW-25-123 29 33.78 4.78 0.31
59 67 8 0.44
127 207 80 0.39
DBW-25-036 0 44 44 0.53
and 119.54 137 17.46 0.37
DBW-25-111 52 57 5 1.75
63 79 16 0.35
132 221 89 0.25
DBW-25-122 11 20.6 9.6 0.18
77 91 14 0.19
106 142 36 0.58
including 127 142 15 1.03
171 238 67 0.30
DBW-25-147 0 17 17 0.20
41 102 61 0.34
including 41 47 6 1.30
82 85 3 1.38
111 126 15 0.27
154 168.05 14.05 0.51
182 183 1 1.34
DBW-25-064 0.7 47 46.3 0.42
DBW-25-114 26 32 6 0.21
43 87 44 0.37
122 208.5 86.5 0.15
DBW-25-149 23 40.84 17.84 0.85
Including 31 39 8 1.71
50.58 72 21.42 0.38
171 197.65 26.65 0.38
DBW-25-110 42 77 35 0.36
89 102 13 0.34
145 154 9 0.20
DBW-25-065 91 98 7 0.16
127 163 36 0.33
DBW-25-106 38 43 5 0.19
59 67 8 0.4
173 210 37 0.31
DBW-25-031 27 36 9 0.34
119 142 23 0.49
160 181 21 0.34
DBW-25-037 0 42 42 0.25
DBW-25-127 42 72 30 0.32
96 107 11 0.53
174.95 180 5.05 0.29
DBW-25-117 42 46 4 0.51
67 95 28 0.30
103 109 6 0.19
143 182 39 0.15
DBW-25-120 13 19 6 0.54
89 144.5 55.5 0.15
164 172 8 0.46
DBW-25-108 10 51 41 0.20
106 153 47 0.14
DBW-25-054 14 20 6 0.19
37 54 17 0.47
including 37 38 1 5.94
64.3 66 1.7 0.57
79 86 7 1.01
DBW-25-148 72.2 78 5.8 0.18
86 102 16 0.17
119 139.7 20.7 0.17
169 190 21 0.33
  • Assay results based on four-acid digest, ICP-OES finish. Intervals listed are based on drilling intervals and therefore are considered relative rather than true widths.
  • The full table of assays including locations is available on the Company’s website and can be accessed through this link: Dumbwa Drill Hole Location and Assay Table.

 

“What began as a geological concept has now been established as a significant discovery, with over 5.3km of strike now tested and supported by more than 40,000m of drilling. Our team is rapidly defining what is emerging as an exceptionally large, near-surface, structurally controlled copper sulphide deposit” stated COO, Kevin Bonel.

“We are developing a clear understanding of Dumbwa and can see the hallmark ‘pinch-and-swell’ geometry typical of major structurally controlled systems and have confirmed unequivocally that Dumbwa is a basement-hosted, strain-related deposit, geologically comparable in every way to Barrick’s Lumwana. We also recognize a predictable grade distribution along strike, with broader higher-grade zones separated by narrower lower-grade domains. Most importantly, we are continuing to establish meaningful scale with each step north expanding the system and mineralisation remaining open, alongside a clear plan to unlock additional mineralisation within zones identified through earlier drilling.”

 

Figure 1: Dumbwa drilling to date, plotted on 11.2km Phase One copper-in-soil anomaly, target area.

Figure 2: Dumbwa drilling to date, magnified to show current 5.3km drilled strike extent, plotted on Phase One copper-in-soil anomaly, target area.

 

Dumbwa Today – Geological Model Verified

The Company’s drilling has now surpassed 200 holes for a total of more than 42,000m over 5.3km of strike, and continues to confirm that Dumbwa is an exceptionally large, very near surface, structurally controlled copper sulphide deposit which remains open for growth. Drill testing has focussed on the upper ~220m of the deposit with the intent of defining a resource amenable to rapid, low strip ratio, low-cost future development. It is noted that some areas of similar mineralisation at the nearby Lumwana project can be traced to vertical depths well beyond 200m. At Dumbwa, east-west width of the mineralised corridor ranges from 200m to greater than 500m. Copper grades are variable ranging from thick lower grade intercepts (> 50 m @ <0.3%) to thick higher-grade intercepts (>25m@>0.5%). Grade variability is pronounced along strike (north-south) and is influenced by cross-cutting northwest-southeast structures that adversely affect the strain regime and subsequent development of mineralised schists. In contrast, grades are relatively consistent east-west within the higher, medium and lower grade zones, and across the width of the mineralised corridor.

Figure 3: Assay grade shells superimposed on the Dumba soil anomaly showing the correlation between high soil anomalies and medium to high grade mineralised intercepts at Dumbwa. Drilling continues to follow the soil anomaly north.

 

The First 5.3km Of Strike – In Detail

As seen in the grade distribution map, the first higher grade zone (the “TRS Block”) starts at the south concession boundary and is approximately 1,800m long, varying from 200m wide to more than 500m wide in places, with scope to increase the known mineralised envelope eastwards and at greater depth.

This is followed by a lower grade zone (“CF Block 1”) ~900m along strike and again averaging around 200m wide. Here the strain in the gneisses is observed as lower and consequently there was poor schistose lens development and weaker mineralisation, although the mineralisation remains persistent along strike.

This lower grade zone transitions into the next higher-grade portion of the deposit (the “ES Block”) which, to date, has been extended for 1,600m along strike at an average width of ~500m, expanding it to over twice the width of the southernmost higher-grade zone.

This brings the drill defined medium-to-high grade zones to a total strike length of 3,300m with widths varying from 200m to over 500m.

In both higher-grade zones, mineralisation depth extent has been demonstrated to start at surface and reach between 175m and 220m deep, with occasional deeper holes demonstrating mineralisation continuing to a depth greater than 300m.

Structurally, the southern part of the Dumbwa copper deposit is weakly broken by late NW-SE trending structural corridors (late brittle faulting) although offset distances are minimal. Early observations on drill core from the area north of strike kilometre 5, the area currently being tested by drilling, indicates more intense late brittle faulting and locally larger offsets, however, the relationship between high strain leading to copper mineralised schist development holds true.

 

Figure 4: Long Section showing 4km mineralised strike and distribution of bornite and chalcopyrite.

 

Lumwana Analogue Confirmed

Detailed lithological and structural logging is showing the Dumbwa copper deposit to be a stacked series of horizontal to shallow east dipping copper sulphide mineralised biotite and biotite-muscovite schists (“2 mica schists”) within a barren grey and pink basement gneiss sequence. The schists form in an intimate relationship with strain which has resulted in the schists being variably developed over the 5.3 km that have been drilled to date. Simply put, increasing strain leads to greater schist development, which in turn results in higher copper sulphide concentration.

The relationship between high tectonic strain and the evolution of the copper-bearing schists is very clear, and the similarity between Lumwana and Dumbwa has been well established.

As with Lumwana, where there is both high strain and mineralised schist, a kyanitic overprint is commonly observed and these correlate with the highest grades and thickest copper intercepts observed in Dumbwa.

Dumbwa and Lumwana share extraordinary geological similarity, formed by the same basement-hosted structural and mineralisation processes:

 

Lumwana
Dumbwa
Copper sulphide mineralised biotite and muscovite-biotite schists within a grey and pink gneiss package Copper sulphide mineralised biotite and muscovite-biotite schists within a grey and pink gneiss package
Host rocks ancient basement gneisses Host rocks ancient basement gneisses
Copper mineralisation related to high strain and the evolution of schists as a C1 fabric Copper mineralisation related to high strain and the evolution of schists as a C1 fabric
Copper mineralisation dominated by chalcopyrite with bornite and subordinate chalcocite Copper mineralisation dominated by chalcopyrite with bornite and subordinate chalcocite
Lumwana dominated by shallow dipping (south and east) mineralised schists Dumbwa dominated by shallow (mostly east) dipping mineralised schists
Lumwana mineralised schists anastamosed and intercalated with barren grey gneiss as ‘boudins and rafts’ Dumbwa mineralised schists anastamosed and intercalated with barren grey gneiss as ‘boudins and rafts’
Subsidiary sulphides dominated by pyrite (Chimiwungo) and pyrrhotite (Kamisengo) Dumba dominated by subsidiary pyrite and rare pyrrhotite
Lumwana mineralised schists usually associated with a metasomatic kyanite overprint Dumbwa mineralised schists usually associated with a metasomatic kyanite overprint
Lumwana Chimiwungo

mineralisation extends for >4km east-west and >5km north-south, with a shallow dip to the south. It is sheeted, continuing beyond these limits, with grades and thicknesses decreasing away from the core of the deposit. This mineralisation is still open to the east and south but pinches out to the west and is down-thrown by a series of late-stage, north-dipping, normal faults. The main body of the Chimiwungo deposit consists of multiple stacked mineralised zones, in aggregate varying from 40m to over 100m in thickness (Source: Porterhouse)

The Dumbwa deposit extends for 200m – 500m east-west and at least 5.3km north-south with planned Phase One exploration drilling to test a further 5.7km north for a total of 11.2km of suspected north-south copper mineralised strike. Phase Two will test the northern half of the 20km copper-in-soil anomaly. Stacked mineralised zones go from surface to beyond 300m but average ~175m – 200m.

 

While drilling to date demonstrates Dumbwa having a narrower E-W mineralised corridor (200m-500m wide) when compared to Lumwana, the deposit remains open and has the potential for significantly greater strike length and maximum thickness than Lumwana.

 

Figure 5: Cross Section through Kamisengo – Lumwana (Source: 2024 Barrick NI-43-101 Technical Report).

Figure 6: Cross section through Dumbwa – Line 100N demonstrating the strong similarity with the geology and mineralisation at Lumwana

 

Laboratory Issues Resolved

In early February 2026, the Company encountered quality control issues with core sample assays at SGS Laboratories in Kalulushi, Zambia. These persisted across multiple batches, creating a significant backlog of assay results. SGS conducted internal audits of their laboratory and systems, which identified several contributing factors, including ICP instrument calibration issues, poor-quality argon gas supply, and complications arising from a facility relocation.

Through rigorous quality assurance and quality control (“QA/QC”) protocols, Midnight Sun identified these issues as they emerged and, through persistent communication, worked with the laboratory to resolve them. SGS has since remedied the issues, with assay results now meeting Midnight Sun’s internal QA/QC standards. With the issues now resolved, the associated assay backlog has been substantially alleviated. Of the 200 holes drilled to date, including ongoing holes that have not yet been sampled, assay results for 66 holes remain pending.

The Company has also been working with Intertek Laboratories, and has dispatched recent samples for assaying to Intertek in Perth, Australia.

 

Dumbwa – Continued Expansion

Detailed geological cross-sections of assay results, lithologies, and structures have indicated that some of the early drill fences located in the south part of the Dumbwa copper deposit were stopped short of fully testing the mineralised width, particularly in the southernmost high-grade zone. Further drilling is planned to test these incomplete drill fences with the expectation that the southern mineralised zone will grow eastwards, having potential to add materially to the overall deposit size.

As of this news release, the initial, broadly spaced, shallow drilling has tested approximately one third of the strike extent being targeted in the Phase One program (with assay results released for the first 4km) . Drilling will continue along the planned strike length of 11.2km in Phase One with a further 200 holes planned for an additional 40,000m of drilling, including width extensions on certain previously drilled fences.

Figure 7: Planned drill holes to extend mineralised width of fences.

The Dumbwa deposit remains open to the north along the entire extent of the continuous copper-in-soil anomaly, to the east in certain areas, and to depth. Exploration work at Dumbwa, including drilling, is expected to continue on an ongoing basis.

 

Quality Control/Quality Assurance

Drilling was conducted using a conventional diamond drilling rig and drill core was captured for the entirety of each hole and placed into plastic core trays. All drill holes were cored in PQ until stable ground was achieved and then reduced to HQ size for the remainder of each hole. Sampling was based on visible copper mineralisation, and sample intervals honoured any important lithological boundaries. Core was then cut in house using a diamond saw and the right half of core was placed into a 200-micron plastic bag, assigned a unique sample number, and recorded into GeoSpark logging system. Samples always remained under the supervision of Midnight Sun staff to maintain chain of custody. All samples were then delivered to SGS Labs located in Kalulushi, Zambia, a fully accredited laboratory. Once received, the samples were sorted, dried, crushed, and pulverized (SGS code PRP90) followed by four-acid digest with ICP-OES finish (SGS Code ICP42S). Copper range of detection is 0.01-10%. Midnight Sun follows an in-house QA/QC program that consists of a random insertion every 10th sample of either a coarse blank, fine blank, coarse duplicate, fine duplicate, or Certified Reference Material (standards).

 

Qualified Person: Darin Labrenz, P.Geo., a consulting geologist for the Company and Qualified Person under NI 43-101, has reviewed and approved the technical data and contents of this release.

 

About Midnight Sun

Midnight Sun is rapidly advancing the Solwezi Copper Project, with a focus on our flagship Dumbwa copper deposit. The Project is located near the town of Solwezi in the heart of the Zambia–Congo Copperbelt, the world’s second-largest copper-producing region. This prolific mining district is renowned for hosting multiple major copper deposits, and benefits from excellent infrastructure, an established mining workforce, and a long history of successful production.

The Solwezi Copper Project is surrounded by producing copper mines, including the geologically similar Lumwana mine just west of our project and First Quantum’s Kansanshi mine – Africa’s largest integrated metallurgical processing facility, approximately 6 kilometres east of the company’s recently announced Kazhiba Oxide Resource. This highly favourable location highlights the district-scale potential of Midnight Sun’s land package.

The Dumbwa copper deposit underlays a robust 20-kilometre copper-in-soil anomaly, and ongoing drilling has demonstrated strong geological similarities to the nearby Lumwana mine, underscoring the potential scale of this new copper system.

Led by an experienced geological team with a proven track record of major discoveries in the Zambia–Congo Copperbelt and globally, Midnight Sun’s goal is to delineate Zambia’s next generational copper deposit.

 

ON BEHALF OF THE BOARD OF MIDNIGHT SUN MINING CORP.

Al Fabbro

President & CEO

 

For Further Information Contact:

Adrian O’Brien

VP Business Development and Communications

Tel: +1 604 809 6890

Em: adrian@midnightsunmining.com

 

NEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICES PROVIDER (AS THAT TERM IS DEFINED IN THE POLICIES OF THE TSX VENTURE EXCHANGE) ACCEPTS RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THIS NEWS RELEASE.

This news release contains “forward-looking statements” within the meaning of the applicable Canadian securities legislation that are based on expectations, estimates, assumptions, geological theories, and projections as at the date of this news release. The information in this news release about any information herein that is not a historical fact may be “forward looking statements.” Any statement that involves discussions with respect to predictions, expectations, beliefs, plans, projections, objectives, assumptions, future events or performance (which may, but not always, include phrases such as “anticipates”, “expects”, “plans”, “scheduled”, “believed” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking statements and are intended to identify forward-looking statements.

Although the forward-looking statements contained in this news release are based upon what management believes, or believed at the time, to be reasonable assumptions, the Company cannot assure readers that actual results will be consistent with such forward-looking statements, as there may be other factors that cause results not to be as anticipated, estimated or intended. Such factors include, among others, risks relating to the timing and ability of the Company to obtain and the timing of the approval of relevant regulatory bodies, if at all; risks relating to property interests; risks related to access to the project; risks inherent in mineral exploration, including the fact that any particular phase of exploration may be unsuccessful; the availability of contractors; geo-political risks; the global economic climate; metal prices; environmental risks; political risks; and community and non-governmental actions. Further to this, geological similarities or characteristics are not guarantees or certainties of successful exploration. Neither the Company nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking statements. The Company does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

 

Midnight Sun Files Technical Report for Kazhiba Main Copper Oxide Project

Vancouver, British Columbia, March 9th, 2026 – Midnight Sun Mining Corp. (TSXV:
MMA / OTCQX: MDNGF) (“Midnight Sun” or the “Company”) announces that, further
to its news release dated January 20, 2026, it has filed a Technical Report for its
Kazhiba Main copper oxide project located in Solwezi, Zambia.
The technical report was prepared by DMT Kai Batla PTY Ltd. in accordance with
National Instrument 43-101– Standards for Disclosure for Mineral Projects. It has an
effective date of January 20, 2026, with Ms. Mpai Motloung acting as the main author
and Mr. Dexter Ferreira as the Qualified Person. The technical report titled “NI 43-
101 Mineral Resource Estimate Technical Report on Kazhiba Main Copper Oxide
Project, Solwezi, Zambia” has been filed on the SEDAR+ website
at www.sedarplus.ca and will be posted on the Company’s website
at www.midnightsunmining.com.

About Midnight Sun
Midnight Sun is rapidly advancing the Solwezi Copper Project, with a focus on our
flagship Dumbwa Target. The Project is located near the town of Solwezi in the heart
of the Zambia–Congo Copperbelt, the world’s second-largest copper-producing
region. This prolific mining district hosts multiple major copper deposits, and
benefits from excellent infrastructure, an established mining workforce, and a long
history of successful production.
Led by an experienced geological team with a proven track record of major
discoveries in the Zambia–Congo Copperbelt and globally, Midnight Sun’s goal is to
delineate Zambia’s next generational copper deposit.

ON BEHALF OF THE BOARD OF MIDNIGHT SUN MINING CORP.

Al Fabbro

President & CEO

For Further Information Contact:
Adrian O’Brien
VP Business Development and Communications
Tel: +1 604 809 6890
Em: adrian@midnightsunmining.com

NEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICES PROVIDER (AS THAT
TERM IS DEFINED IN THE POLICIES OF THE TSX VENTURE EXCHANGE) ACCEPTS
RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THIS NEWS RELEASE.
This news release contains “forward-looking statements” and “forward-looking
information” (collectively, “forward-looking statements”) within the meaning of applicable
Canadian securities legislation. Forward-looking statements in this news release include,
but are not limited to, statements regarding the Company’s plans and expectations for
future exploration and development activities. Such forward-looking statements are
based on various assumptions and factors that may prove to be incorrect, including but
not limited to assumptions about: copper prices; exchange rates; processing and recovery
rates that can be achieved; mining and processing costs; the results of future metallurgical
testwork; the ability to obtain necessary permits and approvals; the availability of
financing; and general business and economic conditions.
Forward-looking statements involve known and unknown risks, performance uncertainties
and other factors which may cause the actual results, or achievements of the Company to
be materially different from any future results, performance or achievements expressed
or implied by such forward-looking statements. Such risks and uncertainties include,
among others: the mineral resources disclosed herein are not mineral reserves and do not
have demonstrated economic viability; there is no assurance that the mineral resources
can be converted into mineral reserves; the assumptions underlying the mineral resource
estimate, may not be accurate or achievable; there is no assurance that the assumed
mining method, processing method, or recovery rates can be achieved; no metallurgical
test work has been completed on the Kazhiba Main Copper Oxide Project and actual
recoveries may differ materially from the assumptions used; fluctuations in copper prices

and exchange rates; increases in mining, processing, or capital costs; the preliminary and
conceptual nature of the economic assumptions and pit shell parameters; risks relating
to the timing and ability of the Company to obtain regulatory approvals; risks relating to
the Company’s ability to monetize the deposit or obtain financing; risks inherent in
mineral exploration and development; the availability of contractors and equipment;
geopolitical risks; environmental risks; community and non-governmental actions;
political risks; and the global economic climate. The Company cautions that the foregoing
list of factors is not exhaustive. Further information regarding risks and uncertainties is
included in the Company’s continuous disclosure filings available on SEDAR+ at
www.sedarplus.ca. The Company does not undertake, and assumes no obligation, to
update or revise any such forward-looking statements or forward-looking information
contained herein to reflect new events or circumstances, except as may be required by
law. Readers are cautioned not to place undue reliance on forward-looking statements.