Midnight Sun Closes Oversubscribed C$30,475,575 "Bought Deal" LIFE Offering

Vancouver, British Columbia--(Newsfile Corp. - October 28, 2025) - Midnight Sun Mining Corp. (TSXV: MMA) (OTCQX: MDNGF) ("Midnight Sun" or the "Company") is pleased to announce that it has closed its previously announced upsized "bought deal" financing (the "Offering") for aggregate gross proceeds of C$30,475,575, including the full exercise of the Underwriters' Option.

The Offering consisted of the issuance and sale of 22,574,500 units of the Company (the "Units") at a price per Unit of C$1.35 (the "Issue Price") on a prospectus-exempt basis pursuant to the "listed issuer financing exemption" under Part 5A of NI 45-106 and Coordinated Blanket Order 45-935 - Exemptions from Certain Conditions of the Listed Issuer Financing Exemption (together, the "LIFE Exemption").

The Offering was led by Haywood Securities Inc. ("Haywood"), as lead underwriter and sole bookrunner, on its own behalf and on behalf of a syndicate of underwriters including Beacon Securities Limited, Red Cloud Securities Inc., and SCP Resource Finance LP (together with Haywood, the "Underwriters").

Each Unit consists of one common share in the capital of the Company (a "Common Share") and one-half of one common share purchase warrant of the Company (each whole purchase warrant, a "Warrant"). Each Warrant entitles the holder thereof to acquire one common share in the capital of the Company (a "Warrant Share") at a price per Warrant Share of C$2.00 until October 28, 2027.

The net proceeds from the sale of the Units will be used by the Company for advancing exploration across the Company's Zambian exploration projects and for working capital and general corporate purposes.

The Units issued to Canadian resident subscribers under the LIFE Exemption are not subject to a hold period pursuant to applicable Canadian securities laws.

There is an offering document related to the Offering of Units that can be accessed under the Company's issuer profile at www.sedarplus.ca and on the Company's website at www.midnightsunmining.com.

In consideration for their services, the Company paid the Underwriters a cash commission equal to 6.0% of the gross proceeds from the Offering and issued to the Underwriters transferable compensation options (the "Compensation Options") entitling the Underwriters to purchase up to that number of Common Shares as is equal to 6.0% of the aggregate number of Units sold under the Offering at a price per Common Share equal to the Issue Price until October 28, 2027.

The Offering remains subject to the final approval of the TSX Venture Exchange (the "TSXV").

The Units have not been registered and will not be registered under the U.S. Securities Act of 1933, as amended, and may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements. This press release shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of the securities in any State in which such offer, solicitation or sale would be unlawful.

About Midnight Sun

Midnight Sun is focused on exploring our flagship Solwezi Project, located in Zambia. Situated in the heart of the Zambia-Congo Copperbelt, the second largest copper producing region in the world, our property is vast and highly prospective. Our Solwezi Project is surrounded by producing copper mines, including Africa's largest copper mining complex right next door, First Quantum's Kansanshi Mine. Led by an experienced geological team with multiple discoveries and mines around the world to their credit, Midnight Sun's goal is to find and develop Zambia's next generational copper deposit.

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", "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) including statements regarding the Company's plans with respect to the Company's projects and the timing related thereto, the merits of the Company's projects, the Company's objectives, plans and strategies, the Offering, the receipt of TSXV final approval, the use of proceeds of the Offering and other matters 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, with respect to the Offering, the conditions of the financial markets, and the timing of TSXV final approval; and with respect to the use of proceeds, the availability of drills and personnel, weather, the speculative nature of mineral exploration and development, fluctuating commodity prices, 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, as described in more detail in our recent securities filings available at www.sedarplus.ca. 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.

/ NOT FOR DISTRIBUTION TO UNITED STATES NEWSWIRE SERVICES OR FOR DISSEMINATION IN THE UNITED STATES /

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