{"success":true,"data":{"pressRelease":{"id":"180696","rtpr_id":"nGNX21wHxr-20261027","ticker":"MMA","exchange":"","all_tickers":["MMA"],"title":"Midnight Sun’s Dumbwa Copper Deposit More Than Doubles in Width to Over 2.4 km in Northern Block","author":"Globe Newswire","published_at":"2026-10-27T10:30:00.418Z","article_body":"VANCOUVER, British Columbia, Oct. 27, 2026 (GLOBE NEWSWIRE) -- Midnight Sun\nMining Corp. (TSXV: MMA / OTCQX: MDNGF) (“Midnight Sun” or the\n“Company”) is pleased to report ongoing drilling at its Dumbwa copper\ndeposit in Zambia has identified a significant expansion of the mineralized\nsystem in the Northern Block. Recent drilling has encountered near-surface\ncopper mineralization across an east-west extent exceeding 2,400 metres, which\nis more than double the average width of the previously drilled Dumbwa\nMineralized Corridor. This expanded footprint represents a major development\nas the Company advances its Phase Two exploration program, with drilling\ncontinuing to test the northern extent of Dumbwa and further define the\ndistribution of copper mineralization within the broader system.\n\nWith the copper mineralization continuing to be flat-laying to shallowly\ndipping, and located at or very near surface, this is another promising\ndevelopment at Dumbwa.\n\n“As drilling progresses north, we appear to have passed through another\nstructural disruption and are now encountering copper sulphide mineralization\nacross significantly greater east-west widths, with locally increased\nmineralized thicknesses. These observations are providing exciting insight\ninto the geological architecture of the Northern Block and will help guide our\nongoing exploration of this expanding system” states Midnight Sun’s COO,\nDr. Kevin Bonel.\n\n\n\nFigure 1. Assay Results and Interpreted Dumbwa Mineralized Corridor\n\nDrill Results\nThe Company has, after lengthy delays due to ongoing issues at contracted\nanalytical facilities (see below), received results from 76 drill holes\nrepresenting 17,373 metres of drilling. The results include assays from both\nthe expansion and the delineation drill programs which are ongoing at Dumbwa.\n\nRecent assay results continue to deliver multiple shallow, higher grade,\ncopper intercepts within broader zones of copper sulphide mineralization. The\nresults reported today are from holes drilled across various areas of the\nstrike length of the deposit and include holes which had previously failed to\nmeet the Company’s QA/QC standards and were therefore not previously\nreported. Highlights include:\n* DBW-26-283 - 0.47% Cu over 31.1 m,\n\nincluding - 0.81% Cu over 16.0 m.\n* DBW-26-261 - 0.67% Cu over 11.0 m.\n* DBW-26-355 - 1.05% Cu over 7.0 m.\n* DBW-26-266 - 0.48% Cu over 14.0 m.\nMidnight Sun’s President and CEO, Al Fabbro, states, “Phase One was\ndesigned to rapidly and systematically establish scale and outline the\ngeological architecture of Dumbwa. I am extremely proud of what our team has\naccomplished, demonstrating more than 12 kilometres of mineralized strike\nlength in just 14 months.\n\nImportantly, our ongoing drilling is now identifying a significant expansion\nof the mineralized system in the north, along with distinct zones of enhanced\ncopper mineralization throughout the main corridor. The geological insights\ngained through Phase One are now allowing us to focus Phase Two drilling on\nthe most prospective areas of the Dumbwa system.”\n\nDrilling Highlights:\n\n Hole ID     From (m)  To (m)  Interval (m)  Cu (%)  Block Area     \n DBW-26-217  208.0     212.0   4.0           0.90    Central North  \n DBW-26-230  10.0      33.0    23.0          0.12    Central North  \n DBW-26-238  82.2      88.6    6.4           0.42    Central North  \n DBW-26-241  168.0     182.0   14.0          0.26    Central North  \n Incl.       175.0     182.0   7.0           0.39                   \n DBW-26-257  6.0       35.0    29.0          0.20    Central North  \n DBW-26-261  13.0      24.0    11.0          0.67    Central North  \n DBW-26-266  52.0      66.0    14.0          0.48    Southern       \n and         83.0      88.0    5.0           0.44                   \n DBW-26-282  16.0      41.0    25.0          0.22    Southern       \n DBW-26-283  59.0      90.1    31.1          0.47    Northern       \n Incl.       70.0      86.0    16.0          0.81                   \n DBW-26-346  208.0     213.0   5.0           0.39    Central        \n DBW-26-348  28.0      51.0    23.0          0.32    Northern       \n DBW-26-355  80.0      87.0    7.0           1.05    Central        \n DBW-26-356  3.0       24.0    21.0          0.28    Northern       \n DBW-26-359  9.0       16.0    7.0           0.41    Northern       \n and         24.0      35.0    11.0          0.26                   \n* Assay results based on four-acid digest, ICP-OES finish.\n* Drill indicated thicknesses are estimated to represent 85% to 100% of true\nwidth.\n* The full table of assays including locations is available on the Company’s\nwebsite and can be accessed through this link: Dumbwa Drill Hole Location and\nAssay Table\n(https://midnightsunmining.com/wp-content/uploads/26.10.27-MMA-Drill-Hole-Table-for-Website.pdf).\nPhase One Program Recap\n\nThe field component of the Company’s Phase 1 drill program is now complete,\nalthough some assays are still pending. The program, which consisted of 372\ndiamond drill holes totalling over 87,000 metres (see Company’s news\nreleases for previously announced 214 drill holes totalling 44,941 metres),\nhas demonstrated copper sulphide mineralization along more than 12 km of the\nDumbwa Mineralized Corridor, comprising the southern portion of the broader 20\nkm Dumbwa Target as outlined by geophysics and soil sampling.\n\nThe Phase 1 drill program had two primary goals. The first goal was to\ndiscover the source of a laterally extensive, open ended, copper-in-soil\nanomaly which was previously outlined at Dumbwa, and located directly south of\nFirst Quantum Minerals’ Kansanshi Mine.\n\nOn this front, the program has been an unqualified success. With the discovery\nand emerging understanding of the Dumbwa copper deposit providing the Company\nand its shareholders with a unique asset, in a globally significant copper\nbelt, at a time when the copper price is at or near its all-time highs.\n\nThe second goal was to quickly and efficiently define the full extent of\nDumbwa. On that front, the program has also been highly successful, as\ndemonstrated by the outlining of the copper system along strike for over 12 km\nand recently identifying a doubling in the width of the system as exploration\ncontinues to track Dumbwa northwards. However, this goal remains unfinished,\nfor positive reasons, as the Dumbwa deposit remains open for further expansion\nto both the north and south.\n\nAssay Reporting Update\n\nThe Company has continued to experience extended assay turnaround times due to\nincreased regional sample volumes, power interruptions and equipment failures\nat Intertek's Kitwe preparation facility in Zambia.\n\nIntertek has implemented measures to address these delays, including\ntransferring samples to its Johannesburg facility for preparation, and\nprioritizing the Company’s outstanding samples for analysis in Perth,\nAustralia.\n\nOf the outstanding samples, 1,824 have now been received in Perth for priority\nanalysis, with results targeted by October 30, subject to analytical\ncompletion and QA/QC requirements. A further 1,000 samples have been\ntransferred to Johannesburg for preparation, while 859 samples remain in\nprocessing at Kitwe, with both batches expected to progress to Perth in the\ncoming days.\n\nIntertek has also committed to equipment upgrades at its Kitwe facility,\nincluding replacement pulverising mills and an additional crusher, with\ncommissioning targeted for December 1, 2026. These improvements are expected\nto increase processing capacity and improve turnaround times going forward.\n\nApproximately 5,000 samples, representing 70 drill holes remain outstanding\n(see Figure 1).\n\nMidnight Sun continues to utilize multiple laboratories and maintain its\nstrict internal QA/QC procedures to ensure the reliability of reported\nresults. The Company recognizes the importance of timely and consistent\ntechnical updates and is implementing measures to both improve assay\nturnaround time, and provide more consistent and frequent reporting as pending\nassay results are received and validated.\n\nOngoing Phase 2 Program\n\nAt this time, drilling is focused on the Northern Block of the Dumbwa\nMineralized Corridor, where the Company continues to be greatly encouraged by\nboth the overall width of the mineralized zone and the local intensity of the\nmineralization observed during the logging of drill core from recent drill\nholes.\n\nIn addition, soil sampling continues in both the north and south of Dumbwa as\nthe Company looks to generate additional targets that may sit outside of the\nestablished mineralized corridor.\n\nQuality Control/Quality Assurance\n\nDrilling was conducted using a conventional diamond drilling rig and drill\ncore was captured for the entirety of each hole and placed into plastic core\ntrays. All drill holes were cored in PQ until stable ground was achieved and\nthen reduced to HQ size for the remainder of each hole. Sampling was based on\nvisible copper mineralisation, and sample intervals honoured any important\nlithological boundaries. Core was then cut in house using a diamond saw and\nthe right half of core was placed into a 200-micron plastic bag, assigned a\nunique sample number, and recorded into the GeoSpark Core database system.\n\nTo maintain chain of custody, samples always remained under the supervision of\nMidnight Sun staff prior to delivery to an independent assay lab. Drill\nsamples were delivered to, prepared and analysed by either SGS Labs in Kitwe,\nZambia or to Intertek where sample preparation took place in their Kitwe\nfacility prior to an analysis of pulps in their facility located in Perth,\nWestern Australia. Both laboratories conducted analysis by four-acid digest\nwith ICP-OES finish.\n\nMidnight Sun follows an in-house QA/QC program that consists of a random\ninsertion every 10(th) sample of either a coarse blank, fine blank, coarse\nduplicate, fine duplicate, or Certified Reference Material (standards). The\nCompany has encountered multiple and repeated reporting failures provided by\nthe independent laboratories and only reports results which have met its\nstringent internal QA/QC standards. Where samples fail QA/QC, the Company\nrequests re-analysis of samples until the appropriate QA/QC checks are met.\n\nQualified Person: Darin Labrenz, P.Geo., a consulting geologist for the\nCompany and Qualified Person under NI 43-101, has reviewed and approved the\ntechnical data and contents of this release.\n\nAbout Midnight Sun\n\nMidnight Sun is rapidly advancing the Solwezi Copper Project, with a focus on\nour flagship Dumbwa copper deposit. The Project is located near the town of\nSolwezi in the heart of the Zambia–Congo Copperbelt, the world’s\nsecond-largest copper-producing region. This prolific mining district is\nrenowned for hosting multiple major copper deposits, and benefits from\nexcellent infrastructure, an established mining workforce, and a long history\nof successful production.\n\nThe Solwezi Copper Project is surrounded by producing copper mines, including\nthe geologically similar Lumwana mine to the west and First Quantum’s\nKansanshi mine - Africa’s largest integrated metallurgical processing\nfacility, approximately 6 kilometres east of the Company’s recently\nannounced Kazhiba Oxide Resource. This highly favourable location highlights\nthe district-scale potential of Midnight Sun’s land package.\n\nThe Dumbwa copper deposit underlays a robust 20-kilometre copper-in-soil\nanomaly, and ongoing drilling has demonstrated strong geological similarities\nto the nearby Lumwana mine, underscoring the potential scale of this newly\nidentified copper system.\n\nLed by an experienced geological team with a proven track record of major\ndiscoveries in the Zambia–Congo Copperbelt and globally, Midnight Sun’s\ngoal is to delineate Zambia’s next generational copper deposit.\n\nON BEHALF OF THE BOARD OF MIDNIGHT SUN MINING CORP.\nAl Fabbro\nPresident & CEO\n\nFor Further Information Contact:\nAdrian O’Brien\nVP Business Development and Communications\nTel: +1 604 809 6890\nEm: adrian@midnightsunmining.com\n\nNEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICES PROVIDER (AS THAT\nTERM IS DEFINED IN THE POLICIES OF THE TSX VENTURE EXCHANGE) ACCEPTS\nRESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THIS NEWS RELEASE.\n\nThis news release contains “forward-looking statements” within the meaning\nof the applicable Canadian securities legislation that are based on\nexpectations, estimates, assumptions, geological theories, and projections as\nat the date of this news release. The information in this news release about\nany information herein that is not a historical fact may be “forward looking\nstatements.” Any statement that involves discussions with respect to\npredictions, expectations, beliefs, interpretations, plans, projections,\nobjectives, assumptions, future events or performance (which may, but not\nalways, include phrases such as “anticipates”, “expects”, “plans”,\n“scheduled”, “believed” or “intends” or variations of such words\nand phrases or stating that certain actions, events or results “may” or\n“could”, “would”, “might” or “will” be taken to occur or be\nachieved) are not statements of historical fact and may be forward-looking\nstatements and are intended to identify forward-looking statements. Forward\nlooking statements made in this news release include statements regarding (i)\ntiming of assays on approximately 1,800 outstanding samples, (ii) measures\nbeing taken to improve assay turn around time, (iii) anticipated improvements\nin assay turn around time based on measures taken and being taken, (iv)\nanticipated assay results based on visual inspections, and (iv) the\ncontinuation of mineralization along strike to the north and south.\n\nAlthough the forward-looking statements contained in this news release are\nbased upon what management believes, or believed at the time, to be reasonable\nassumptions, the Company cannot assure readers that actual results will be\nconsistent with such forward-looking statements, as there may be other factors\nthat cause results not to be as anticipated, estimated or intended. Such\nfactors include, among others, risks relating to the timing and ability of the\nCompany to obtain and the timing of the approval of relevant regulatory\nbodies, if at all; risks relating to property interests; risks related to\naccess to the project; risks inherent in mineral exploration, including the\nfact that any particular phase of exploration may be unsuccessful; the\navailability of contractors; geo-political risks; the global economic climate;\nmetal prices; environmental risks; political risks; and community and\nnon-governmental actions. Further to this, the Company is dependent on third\nparty service providers for the delivery of assay services, over which the\nCompany has limited or no control. Assay laboratories servicing Zambian\nexploration and mining companies are extremely busy and may prioritize other\ncompanies over the Company, may experience power and other technical failures,\nand may not have capacity to service the Company on the basis the Company\nexpects. With respect to the exploration potential at Dumbwa, there is no\nguarantee that mineralization will continue along strike either to the north\nor south, which can only be determined through additional drilling, which may\nnot be successful. Neither the Company nor any other person assumes\nresponsibility for the accuracy and completeness of any such forward-looking\nstatements. The Company does not undertake, and assumes no obligation, to\nupdate or revise any such forward-looking statements or forward-looking\ninformation contained herein to reflect new events or circumstances, except as\nmay be required by law.\n\nA photo accompanying this announcement is available at\nhttps://www.globenewswire.com/NewsRoom/AttachmentNg/19dac661-079f-4940-a8d8-8ca0e0ef1206\n\n(https://www.globenewswire.com/NewsRoom/AttachmentNg/adf0be3c-f3b1-4432-83a9-611a71af1343)\nFigure 1 \n(https://www.globenewswire.com/NewsRoom/AttachmentNg/19dac661-079f-4940-a8d8-8ca0e0ef1206/en)\nAssay Results and Interpreted Dumbwa Mineralized Corridor\n\n\nGlobeNewswire, Inc. 2026","article_body_html":"","raw_payload":{"data":{"id":"nGNX21wHxr-20261027","title":"Midnight Sun’s Dumbwa Copper Deposit More Than Doubles in Width to Over 2.4 km in Northern Block","author":"Globe Newswire","ticker":"MMA","created":"2026-10-27T10:30:00.418Z","tickers":["MMA"],"exchange":"","article_body":"VANCOUVER, British Columbia, Oct. 27, 2026 (GLOBE NEWSWIRE) -- Midnight Sun\nMining Corp. (TSXV: MMA / OTCQX: MDNGF) (“Midnight Sun” or the\n“Company”) is pleased to report ongoing drilling at its Dumbwa copper\ndeposit in Zambia has identified a significant expansion of the mineralized\nsystem in the Northern Block. Recent drilling has encountered near-surface\ncopper mineralization across an east-west extent exceeding 2,400 metres, which\nis more than double the average width of the previously drilled Dumbwa\nMineralized Corridor. This expanded footprint represents a major development\nas the Company advances its Phase Two exploration program, with drilling\ncontinuing to test the northern extent of Dumbwa and further define the\ndistribution of copper mineralization within the broader system.\n\nWith the copper mineralization continuing to be flat-laying to shallowly\ndipping, and located at or very near surface, this is another promising\ndevelopment at Dumbwa.\n\n“As drilling progresses north, we appear to have passed through another\nstructural disruption and are now encountering copper sulphide mineralization\nacross significantly greater east-west widths, with locally increased\nmineralized thicknesses. These observations are providing exciting insight\ninto the geological architecture of the Northern Block and will help guide our\nongoing exploration of this expanding system” states Midnight Sun’s COO,\nDr. Kevin Bonel.\n\n\n\nFigure 1. Assay Results and Interpreted Dumbwa Mineralized Corridor\n\nDrill Results\nThe Company has, after lengthy delays due to ongoing issues at contracted\nanalytical facilities (see below), received results from 76 drill holes\nrepresenting 17,373 metres of drilling. The results include assays from both\nthe expansion and the delineation drill programs which are ongoing at Dumbwa.\n\nRecent assay results continue to deliver multiple shallow, higher grade,\ncopper intercepts within broader zones of copper sulphide mineralization. The\nresults reported today are from holes drilled across various areas of the\nstrike length of the deposit and include holes which had previously failed to\nmeet the Company’s QA/QC standards and were therefore not previously\nreported. Highlights include:\n* DBW-26-283 - 0.47% Cu over 31.1 m,\n\nincluding - 0.81% Cu over 16.0 m.\n* DBW-26-261 - 0.67% Cu over 11.0 m.\n* DBW-26-355 - 1.05% Cu over 7.0 m.\n* DBW-26-266 - 0.48% Cu over 14.0 m.\nMidnight Sun’s President and CEO, Al Fabbro, states, “Phase One was\ndesigned to rapidly and systematically establish scale and outline the\ngeological architecture of Dumbwa. I am extremely proud of what our team has\naccomplished, demonstrating more than 12 kilometres of mineralized strike\nlength in just 14 months.\n\nImportantly, our ongoing drilling is now identifying a significant expansion\nof the mineralized system in the north, along with distinct zones of enhanced\ncopper mineralization throughout the main corridor. The geological insights\ngained through Phase One are now allowing us to focus Phase Two drilling on\nthe most prospective areas of the Dumbwa system.”\n\nDrilling Highlights:\n\n Hole ID     From (m)  To (m)  Interval (m)  Cu (%)  Block Area     \n DBW-26-217  208.0     212.0   4.0           0.90    Central North  \n DBW-26-230  10.0      33.0    23.0          0.12    Central North  \n DBW-26-238  82.2      88.6    6.4           0.42    Central North  \n DBW-26-241  168.0     182.0   14.0          0.26    Central North  \n Incl.       175.0     182.0   7.0           0.39                   \n DBW-26-257  6.0       35.0    29.0          0.20    Central North  \n DBW-26-261  13.0      24.0    11.0          0.67    Central North  \n DBW-26-266  52.0      66.0    14.0          0.48    Southern       \n and         83.0      88.0    5.0           0.44                   \n DBW-26-282  16.0      41.0    25.0          0.22    Southern       \n DBW-26-283  59.0      90.1    31.1          0.47    Northern       \n Incl.       70.0      86.0    16.0          0.81                   \n DBW-26-346  208.0     213.0   5.0           0.39    Central        \n DBW-26-348  28.0      51.0    23.0          0.32    Northern       \n DBW-26-355  80.0      87.0    7.0           1.05    Central        \n DBW-26-356  3.0       24.0    21.0          0.28    Northern       \n DBW-26-359  9.0       16.0    7.0           0.41    Northern       \n and         24.0      35.0    11.0          0.26                   \n* Assay results based on four-acid digest, ICP-OES finish.\n* Drill indicated thicknesses are estimated to represent 85% to 100% of true\nwidth.\n* The full table of assays including locations is available on the Company’s\nwebsite and can be accessed through this link: Dumbwa Drill Hole Location and\nAssay Table\n(https://midnightsunmining.com/wp-content/uploads/26.10.27-MMA-Drill-Hole-Table-for-Website.pdf).\nPhase One Program Recap\n\nThe field component of the Company’s Phase 1 drill program is now complete,\nalthough some assays are still pending. The program, which consisted of 372\ndiamond drill holes totalling over 87,000 metres (see Company’s news\nreleases for previously announced 214 drill holes totalling 44,941 metres),\nhas demonstrated copper sulphide mineralization along more than 12 km of the\nDumbwa Mineralized Corridor, comprising the southern portion of the broader 20\nkm Dumbwa Target as outlined by geophysics and soil sampling.\n\nThe Phase 1 drill program had two primary goals. The first goal was to\ndiscover the source of a laterally extensive, open ended, copper-in-soil\nanomaly which was previously outlined at Dumbwa, and located directly south of\nFirst Quantum Minerals’ Kansanshi Mine.\n\nOn this front, the program has been an unqualified success. With the discovery\nand emerging understanding of the Dumbwa copper deposit providing the Company\nand its shareholders with a unique asset, in a globally significant copper\nbelt, at a time when the copper price is at or near its all-time highs.\n\nThe second goal was to quickly and efficiently define the full extent of\nDumbwa. On that front, the program has also been highly successful, as\ndemonstrated by the outlining of the copper system along strike for over 12 km\nand recently identifying a doubling in the width of the system as exploration\ncontinues to track Dumbwa northwards. However, this goal remains unfinished,\nfor positive reasons, as the Dumbwa deposit remains open for further expansion\nto both the north and south.\n\nAssay Reporting Update\n\nThe Company has continued to experience extended assay turnaround times due to\nincreased regional sample volumes, power interruptions and equipment failures\nat Intertek's Kitwe preparation facility in Zambia.\n\nIntertek has implemented measures to address these delays, including\ntransferring samples to its Johannesburg facility for preparation, and\nprioritizing the Company’s outstanding samples for analysis in Perth,\nAustralia.\n\nOf the outstanding samples, 1,824 have now been received in Perth for priority\nanalysis, with results targeted by October 30, subject to analytical\ncompletion and QA/QC requirements. A further 1,000 samples have been\ntransferred to Johannesburg for preparation, while 859 samples remain in\nprocessing at Kitwe, with both batches expected to progress to Perth in the\ncoming days.\n\nIntertek has also committed to equipment upgrades at its Kitwe facility,\nincluding replacement pulverising mills and an additional crusher, with\ncommissioning targeted for December 1, 2026. These improvements are expected\nto increase processing capacity and improve turnaround times going forward.\n\nApproximately 5,000 samples, representing 70 drill holes remain outstanding\n(see Figure 1).\n\nMidnight Sun continues to utilize multiple laboratories and maintain its\nstrict internal QA/QC procedures to ensure the reliability of reported\nresults. The Company recognizes the importance of timely and consistent\ntechnical updates and is implementing measures to both improve assay\nturnaround time, and provide more consistent and frequent reporting as pending\nassay results are received and validated.\n\nOngoing Phase 2 Program\n\nAt this time, drilling is focused on the Northern Block of the Dumbwa\nMineralized Corridor, where the Company continues to be greatly encouraged by\nboth the overall width of the mineralized zone and the local intensity of the\nmineralization observed during the logging of drill core from recent drill\nholes.\n\nIn addition, soil sampling continues in both the north and south of Dumbwa as\nthe Company looks to generate additional targets that may sit outside of the\nestablished mineralized corridor.\n\nQuality Control/Quality Assurance\n\nDrilling was conducted using a conventional diamond drilling rig and drill\ncore was captured for the entirety of each hole and placed into plastic core\ntrays. All drill holes were cored in PQ until stable ground was achieved and\nthen reduced to HQ size for the remainder of each hole. Sampling was based on\nvisible copper mineralisation, and sample intervals honoured any important\nlithological boundaries. Core was then cut in house using a diamond saw and\nthe right half of core was placed into a 200-micron plastic bag, assigned a\nunique sample number, and recorded into the GeoSpark Core database system.\n\nTo maintain chain of custody, samples always remained under the supervision of\nMidnight Sun staff prior to delivery to an independent assay lab. Drill\nsamples were delivered to, prepared and analysed by either SGS Labs in Kitwe,\nZambia or to Intertek where sample preparation took place in their Kitwe\nfacility prior to an analysis of pulps in their facility located in Perth,\nWestern Australia. Both laboratories conducted analysis by four-acid digest\nwith ICP-OES finish.\n\nMidnight Sun follows an in-house QA/QC program that consists of a random\ninsertion every 10(th) sample of either a coarse blank, fine blank, coarse\nduplicate, fine duplicate, or Certified Reference Material (standards). The\nCompany has encountered multiple and repeated reporting failures provided by\nthe independent laboratories and only reports results which have met its\nstringent internal QA/QC standards. Where samples fail QA/QC, the Company\nrequests re-analysis of samples until the appropriate QA/QC checks are met.\n\nQualified Person: Darin Labrenz, P.Geo., a consulting geologist for the\nCompany and Qualified Person under NI 43-101, has reviewed and approved the\ntechnical data and contents of this release.\n\nAbout Midnight Sun\n\nMidnight Sun is rapidly advancing the Solwezi Copper Project, with a focus on\nour flagship Dumbwa copper deposit. The Project is located near the town of\nSolwezi in the heart of the Zambia–Congo Copperbelt, the world’s\nsecond-largest copper-producing region. This prolific mining district is\nrenowned for hosting multiple major copper deposits, and benefits from\nexcellent infrastructure, an established mining workforce, and a long history\nof successful production.\n\nThe Solwezi Copper Project is surrounded by producing copper mines, including\nthe geologically similar Lumwana mine to the west and First Quantum’s\nKansanshi mine - Africa’s largest integrated metallurgical processing\nfacility, approximately 6 kilometres east of the Company’s recently\nannounced Kazhiba Oxide Resource. This highly favourable location highlights\nthe district-scale potential of Midnight Sun’s land package.\n\nThe Dumbwa copper deposit underlays a robust 20-kilometre copper-in-soil\nanomaly, and ongoing drilling has demonstrated strong geological similarities\nto the nearby Lumwana mine, underscoring the potential scale of this newly\nidentified copper system.\n\nLed by an experienced geological team with a proven track record of major\ndiscoveries in the Zambia–Congo Copperbelt and globally, Midnight Sun’s\ngoal is to delineate Zambia’s next generational copper deposit.\n\nON BEHALF OF THE BOARD OF MIDNIGHT SUN MINING CORP.\nAl Fabbro\nPresident & CEO\n\nFor Further Information Contact:\nAdrian O’Brien\nVP Business Development and Communications\nTel: +1 604 809 6890\nEm: adrian@midnightsunmining.com\n\nNEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICES PROVIDER (AS THAT\nTERM IS DEFINED IN THE POLICIES OF THE TSX VENTURE EXCHANGE) ACCEPTS\nRESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THIS NEWS RELEASE.\n\nThis news release contains “forward-looking statements” within the meaning\nof the applicable Canadian securities legislation that are based on\nexpectations, estimates, assumptions, geological theories, and projections as\nat the date of this news release. The information in this news release about\nany information herein that is not a historical fact may be “forward looking\nstatements.” Any statement that involves discussions with respect to\npredictions, expectations, beliefs, interpretations, plans, projections,\nobjectives, assumptions, future events or performance (which may, but not\nalways, include phrases such as “anticipates”, “expects”, “plans”,\n“scheduled”, “believed” or “intends” or variations of such words\nand phrases or stating that certain actions, events or results “may” or\n“could”, “would”, “might” or “will” be taken to occur or be\nachieved) are not statements of historical fact and may be forward-looking\nstatements and are intended to identify forward-looking statements. Forward\nlooking statements made in this news release include statements regarding (i)\ntiming of assays on approximately 1,800 outstanding samples, (ii) measures\nbeing taken to improve assay turn around time, (iii) anticipated improvements\nin assay turn around time based on measures taken and being taken, (iv)\nanticipated assay results based on visual inspections, and (iv) the\ncontinuation of mineralization along strike to the north and south.\n\nAlthough the forward-looking statements contained in this news release are\nbased upon what management believes, or believed at the time, to be reasonable\nassumptions, the Company cannot assure readers that actual results will be\nconsistent with such forward-looking statements, as there may be other factors\nthat cause results not to be as anticipated, estimated or intended. Such\nfactors include, among others, risks relating to the timing and ability of the\nCompany to obtain and the timing of the approval of relevant regulatory\nbodies, if at all; risks relating to property interests; risks related to\naccess to the project; risks inherent in mineral exploration, including the\nfact that any particular phase of exploration may be unsuccessful; the\navailability of contractors; geo-political risks; the global economic climate;\nmetal prices; environmental risks; political risks; and community and\nnon-governmental actions. Further to this, the Company is dependent on third\nparty service providers for the delivery of assay services, over which the\nCompany has limited or no control. Assay laboratories servicing Zambian\nexploration and mining companies are extremely busy and may prioritize other\ncompanies over the Company, may experience power and other technical failures,\nand may not have capacity to service the Company on the basis the Company\nexpects. With respect to the exploration potential at Dumbwa, there is no\nguarantee that mineralization will continue along strike either to the north\nor south, which can only be determined through additional drilling, which may\nnot be successful. Neither the Company nor any other person assumes\nresponsibility for the accuracy and completeness of any such forward-looking\nstatements. The Company does not undertake, and assumes no obligation, to\nupdate or revise any such forward-looking statements or forward-looking\ninformation contained herein to reflect new events or circumstances, except as\nmay be required by law.\n\nA photo accompanying this announcement is available at\nhttps://www.globenewswire.com/NewsRoom/AttachmentNg/19dac661-079f-4940-a8d8-8ca0e0ef1206\n\n(https://www.globenewswire.com/NewsRoom/AttachmentNg/adf0be3c-f3b1-4432-83a9-611a71af1343)\nFigure 1 \n(https://www.globenewswire.com/NewsRoom/AttachmentNg/19dac661-079f-4940-a8d8-8ca0e0ef1206/en)\nAssay Results and Interpreted Dumbwa Mineralized Corridor\n\n\nGlobeNewswire, Inc. 2026"},"type":"article","timestamp":"2026-10-27T10:30:00.458070091Z","server_sent_at_ms":1793097000458},"received_at":"2026-10-27T10:30:00.744Z","source_url":null},"analysis":{"id":"168528","press_release_id":"180696","analysis_json":{"industry":{"label":"Metals & Mining","sector":"Materials"},"redFlags":["extended assay turnaround delays at Intertek Kitwe lab; ~5,000 samples outstanding","company reports repeated lab QA/QC reporting failures; prior holes re-analyzed before release","early-stage exploration results with no resource estimate or economic study"],"eventType":"operations_update","narrative":"Midnight Sun reported drilling has expanded the Dumbwa copper deposit's Northern Block, with near-surface mineralization encountered across an east-west extent exceeding 2,400 metres — more than double the previously drilled corridor width.\n\nThe company released assays from 76 holes (17,373 m), highlighting intercepts including 0.81% Cu over 16.0 m (DBW-26-283) and 1.05% Cu over 7.0 m (DBW-26-355), and confirmed more than 12 km of mineralized strike length after a 372-hole, 87,000+ m Phase 1 program.\n\nPhase 2 drilling continues northward and the deposit remains open; roughly 5,000 samples (70 holes) are still outstanding, with lab delays at Intertek's Kitwe facility expected to ease after equipment upgrades targeted for December 1, 2026.","sentiment":"bullish","agentHooks":{"shouldPost":true,"suggestedAngle":"Dumbwa deposit more than doubles in width with high-grade near-surface intercepts — scale story next to First Quantum's Kansanshi."},"keyFigures":{"customDimensions":{"assay_metres":17373,"samples_at_kitwe":859,"samples_in_perth":1824,"phase1_drill_holes":372,"samples_outstanding":"~5,000 (70 drill holes)","assay_holes_reported":76,"phase1_metres_drilled":"over 87,000 m","samples_in_johannesburg":1000,"mineralized_strike_length":"over 12 km","mineralized_east_west_extent":"2,400 m"}},"quotedText":"As drilling progresses north, we appear to have passed through another structural disruption and are now encountering copper sulphide mineralization across significantly greater east-west widths, with locally increased mineralized thicknesses.","namedEntities":{"people":[{"name":"Dr. Kevin Bonel","role":"COO"},{"name":"Al Fabbro","role":"President & CEO"},{"name":"Darin Labrenz","role":"Qualified Person (P.Geo.)"},{"name":"Adrian O'Brien","role":"VP Business Development and Communications"}],"products":["Dumbwa copper deposit","Solwezi Copper Project","Kazhiba Oxide Resource"],"companies":[{"name":"Midnight Sun Mining Corp.","ticker":"MMA","relationship":"filer"},{"name":"Intertek","relationship":"assay lab"},{"name":"SGS Labs","relationship":"assay lab"},{"name":"First Quantum Minerals","relationship":"neighbouring producer (Kansanshi mine)"}],"dollarAmounts":[]},"materialImpact":{"score":3,"reasoning":"Positive drill results materially expanding the Dumbwa copper deposit footprint (mineralized widths more than doubling to over 2,400 m), plus assay updates. Exploration-stage news with no resource or economic study, so not market-moving but incrementally de-risking."},"tickerRelevance":{"others":[{"ticker":"MDNGF","relevance":"OTCQX listing of same company"}],"primary":"MMA"},"globalImportance":22,"audienceRelevance":18,"eventTypeSecondary":[],"importanceComponents":{"tickerTier":"small/micro-cap TSXV","eventGravity":"exploration drill expansion","commodityTailwind":"copper near all-time highs","householdBrandBoost":0}},"event_type":"operations_update","event_type_secondary":null,"sentiment":"bullish","material_impact_score":3,"narrative":"Midnight Sun reported drilling has expanded the Dumbwa copper deposit's Northern Block, with near-surface mineralization encountered across an east-west extent exceeding 2,400 metres — more than double the previously drilled corridor width.\n\nThe company released assays from 76 holes (17,373 m), highlighting intercepts including 0.81% Cu over 16.0 m (DBW-26-283) and 1.05% Cu over 7.0 m (DBW-26-355), and confirmed more than 12 km of mineralized strike length after a 372-hole, 87,000+ m Phase 1 program.\n\nPhase 2 drilling continues northward and the deposit remains open; roughly 5,000 samples (70 holes) are still outstanding, with lab delays at Intertek's Kitwe facility expected to ease after equipment upgrades targeted for December 1, 2026.","key_figures":{"customDimensions":{"assay_metres":17373,"samples_at_kitwe":859,"samples_in_perth":1824,"phase1_drill_holes":372,"samples_outstanding":"~5,000 (70 drill holes)","assay_holes_reported":76,"phase1_metres_drilled":"over 87,000 m","samples_in_johannesburg":1000,"mineralized_strike_length":"over 12 km","mineralized_east_west_extent":"2,400 m"}},"named_entities":{"people":[{"name":"Dr. Kevin Bonel","role":"COO"},{"name":"Al Fabbro","role":"President & CEO"},{"name":"Darin Labrenz","role":"Qualified Person (P.Geo.)"},{"name":"Adrian O'Brien","role":"VP Business Development and Communications"}],"products":["Dumbwa copper deposit","Solwezi Copper Project","Kazhiba Oxide Resource"],"companies":[{"name":"Midnight Sun Mining Corp.","ticker":"MMA","relationship":"filer"},{"name":"Intertek","relationship":"assay lab"},{"name":"SGS Labs","relationship":"assay lab"},{"name":"First Quantum Minerals","relationship":"neighbouring producer (Kansanshi mine)"}],"dollarAmounts":[]},"model_name":"glm-5.3-flashx","prompt_hash":"sha256:5c812bd9e28b810d","schema_hash":"sha256:05005c02d9cffac9","created_at":"2026-10-27T10:30:08.477Z","global_importance":22,"audience_relevance":18,"importance_components":{"tickerTier":"small/micro-cap TSXV","eventGravity":"exploration drill expansion","commodityTailwind":"copper near all-time highs","householdBrandBoost":0}},"durationMs":7500,"modelName":"glm-5.3-flashx"}}