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Midnight Sun Files Technical Report for Kazhiba Main Copper Oxide Project

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Executive Summary

Midnight Sun Mining Corp. has completed a significant regulatory milestone by filing an NI 43-101 compliant technical report for its Kazhiba Main copper oxide project located in Solwezi, Zambia. The technical report, titled 'NI 43-101 Mineral Resource Estimate Technical Report on Kazhiba Main Copper Oxide Project, Solwezi, Zambia,' was prepared by independent consultants DMT Kai Batla PTY Ltd., with Ms. Mpai Motloung as the main author and Mr. Dexter Ferreira serving as the Qualified Person. The report carries an effective date of January 20, 2026, and has been filed on SEDAR+ as required for TSX Venture Exchange-listed companies.

The Kazhiba Main project forms part of Midnight Sun's broader Solwezi Copper Project, which is strategically positioned in the heart of the Zambia-Congo Copperbelt, the world's second-largest copper-producing region. This location provides significant advantages including established mining infrastructure, an experienced workforce, and proximity to multiple major copper deposits that have demonstrated successful production histories.

The filing of this technical report represents a critical step in advancing the project through the development pipeline, as NI 43-101 reports are mandatory for resource disclosure and provide the technical foundation for future development decisions. The company's focus remains on its flagship Dumbwa Target within the broader project area, with management expressing confidence in their geological team's ability to delineate what they describe as 'Zambia's next generational copper deposit.'

For the copper sector, this development underscores continued exploration and development activity in one of the world's premier copper districts. The Zambia-Congo Copperbelt remains a focal point for copper development given its proven geology and existing infrastructure, particularly important as global copper demand continues to grow driven by electrification and energy transition trends. The completion of formal resource estimation work positions Midnight Sun to advance toward potential development studies and represents progress in bringing new copper supply online in a region with demonstrated production capabilities.
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Press Release

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.

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