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Vancouver, BC – June 26, 2026 – TheNewswire - Uranium One Mining Corp. (“Uranium One" or the "Company") (CSE: UUU | OTC: UUUFD | FWB: SL5 ) is pleased to announce that it has entered into a share exchange agreement (the "Share Exchange Agreement" ) dated effective June 19, 2026, with 1583644 B.C. Ltd. (" NumberCo "), a private corporation incorporated under the laws of British Columbia, and the shareholders of NumberCo (the " NumberCo Shareholders "), pursuant to which Uranium One will acquire all of the issued and outstanding common shares of NumberCo (the " Transaction ").

"The acquisition of the Foghorn and Pasfield Lake properties marks another important milestone in expanding Uranium One's Canadian uranium portfolio," said David Greenway, Chief Executive Officer of Uranium One Mining Corp. "These strategic additions provide exposure to two prospective exploration districts and further strengthen our pipeline of high-potential uranium assets. We look forward to advancing both projects and creating long-term value for our shareholders following the successful completion of the transaction."

In connection with the Transaction, NumberCo has simultaneously entered into two property purchase agreements (collectively, the " Property Purchase Agreements ") to acquire a 100% undivided legal and beneficial interest in each of: (i) the Foghorn mineral property located in British Columbia (the " Foghorn Property "), comprising certain Crown grants and mineral claims, from 0782618 B.C. Ltd.; and (ii) the Pasfield Lake mineral property located in Saskatchewan (the " Pasfield Lake Property "), comprising certain mineral claims, from Zadar Minerals Corp. The closing of the Property Purchase Agreements shall occur prior to or concurrently with the closing of the Transaction. No finder's fees or commissions are payable by the Company in connection with the Transaction.

Transaction Structure

Pursuant to the Share Exchange Agreement, Uranium One will acquire all of the issued and outstanding common shares of NumberCo in exchange for the issuance of an aggregate of 27,060,000 common shares of Uranium One (the " Consideration Shares ") to the NumberCo Shareholders on a pro rata basis in accordance with their respective shareholdings. In connection with the closing of the Property Purchase Agreements, NumberCo will issue an aggregate of 12,060,000 additional common shares (the " Property Purchase Shares ") as consideration for the acquisition of the Foghorn Property and the Pasfield Lake Property, of which 8,900,000 Property Purchase Shares shall be issued to the designees of 0782618 B.C. Ltd. in respect of the Foghorn Property and 3,160,000 Property Purchase Shares shall be issued to Zadar Minerals Corp. in respect of the Pasfield Lake Property.

In addition, on closing of the Transaction, Uranium One will pay an aggregate of C$250,000 in cash to one of the arm’s length vendors of the Foghorn Property.  in connection with the acquisition of the Foghorn Property. The Foghorn Property will be subject to a 3% net smelter returns royalty, with a buyback right for up to 1.5% for an aggregate maximum buyback price of C$1,500,000. The Pasfield Lake Property is subject to an existing 2% net smelter returns royalty in favour of Canterra Minerals Corporation, subject to a buydown right to 1% upon payment of C$1,000,000.

Completion of the Transaction is subject to a number of conditions, including, without limitation, receipt of all required regulatory, corporate and third-party approvals (including approval of the Canadian Securities Exchange (the " CSE ")), and such other customary closing conditions as set forth in the Share Exchange Agreement. There can be no assurance that the Transaction will be completed as proposed or at all.

The Properties

The Foghorn Property is a historical polymetallic exploration project located in British Columbia comprising approximately 40 Crown-granted mineral claims covering approximately 614 hectares (1,517 acres). Historical exploration on the property dates back to the early 1900s and has included reported geological mapping, drilling, underground development and metallurgical testing targeting uranium, fluorite and other critical minerals. The property hosts multiple styles of mineralization and offers potential for modern exploration using contemporary geological and geophysical techniques. The Company believes the project represents an attractive opportunity to evaluate historical exploration results through a systematic, multi-commodity exploration approach.

The Company has not independently verified the historical exploration information relating to the Foghorn Property and such information should not be relied upon.

The Pasfield Lake Property consists of a prospecting permit covering approximately 4,400 hectares (10,873 acres) in northeastern Saskatchewan. The property is located within a prospective uranium district approximately 100 kilometres northwest of the Collins Bay mining area and 60 kilometres northwest of the Cigar Lake Mine. Historical exploration in the broader Pasfield Lake area has identified surface uranium occurrences, while modern exploration has been relatively limited. The property is situated within a region considered prospective for unconformity-related uranium mineralization and provides Uranium One with exposure to one of the world's premier uranium jurisdictions. Mineralization on nearby properties or mines is not necessarily indicative of mineralization on the Pasfield Lake Property .

The acquisitions complement Uranium One's strategy of assembling a diversified portfolio of prospective uranium exploration assets across Canada, providing exposure to multiple geological settings with significant exploration upside and long-term discovery potential.

About Uranium One Mining Corp.

Uranium One Mining Corp. is a Canadian mineral exploration company focused on the acquisition, exploration, and development of uranium projects and select battery metals assets. The Company is advancing a diversified portfolio of high-potential projects in Canada, Paraguay and Argentina, with a strategic focus on assets positioned to benefit from the increasing global demand for nuclear energy and secure energy supply chains.

The Company’s projects include the Quark Uranium Project, the Yuty Prometeo Uranium Project, and the Nucleon Uranium Project, each of which offers significant exploration upside and potential for resource expansion.

Uranium One Mining Corp. is committed to responsible exploration practices, disciplined capital allocation, and the creation of long-term shareholder value through the systematic advancement of its project portfolio.

About 1583644 B.C. Ltd.

1583644 B.C. Ltd. is a private corporation incorporated under the laws of British Columbia.

On Behalf of the Uranium One Mining Corp. Board of Directors:

"David Greenway"

David Greenway, CEO

For further information, please contact:

Uranium One Mining Corp.

Brent Rusin

Phone: +1 672-533-0348

Email: info@uraniumone.com

Website: www.uraniumone.com

Cautionary Note Regarding Forward-Looking Statements and Information

This news release may contain certain forward-looking statements and forward-looking information (collectively, “Forward-Looking Statements”) within the meaning of the applicable Canadian and U.S. securities laws. All statements, other than statements of historical fact, included herein are Forward-Looking Statements. When or if used in this news release, the words “anticipate”, “believe”, “estimate”, “expect”, “target", “plan”, “forecast”, “may”, “schedule” and similar words or expressions identify Forward-Looking Statements.

Forward-Looking Statements in this news release include, without limitation, statements relating to: the anticipated completion of the Transaction and the Property Purchase Agreements; the Company's plans with respect to the Foghorn Property and the Pasfield Lake Property following the Transaction; the satisfaction of conditions precedent to the closing of the Transaction, including receipt of CSE approval and other regulatory approvals; and the Company's broader business objectives, exploration plans, and strategic direction.

Forward-Looking Statements are based on the reasonable assumptions, estimates, expectations, and opinions of management of the Company as of the date of this news release, and are necessarily subject to a number of known and unknown risks, uncertainties, and other factors that may cause actual results, performance, or achievements of the Company to be materially different from those expressed or implied by such Forward-Looking Statements, including but not limited to: the risk that the Transaction may not be completed on the terms contemplated or at all; the risk that conditions precedent to the closing of the Transaction may not be satisfied or waived; the potential dilution to existing shareholders of the Company resulting from the issuance of the Consideration Shares to the NumberCo Shareholders; risks relating to the mineral exploration industry, including the inherent uncertainty of mineral exploration and development; risks related to the title, ownership, and condition of the mineral claims; the impact of existing royalty obligations on the future economics of the properties; fluctuations in commodity prices, including uranium prices; changes in applicable laws, regulations, or government policies in Canada or any other relevant jurisdiction; general economic, market, and business conditions; and any other risks and uncertainties described from time to time in the Company's public disclosure documents filed on SEDAR+. Although the Company believes that the assumptions underlying the Forward-Looking Statements are reasonable, undue reliance should not be placed on these statements, which apply only as of the date of this news release. The Forward-Looking Statements contained herein are expressly qualified in their entirety by this cautionary note. The Company does not undertake any obligation to publicly update or revise any Forward-Looking Statements, whether as a result of new information, future events, or otherwise, except as required by applicable securities laws.

Readers are cautioned that the foregoing list of risks and uncertainties is not exhaustive. Additional information about these and other risks and uncertainties is available in the Company's public disclosure documents filed on SEDAR+ at www.sedarplus.ca.

Neither the Canadian Securities Exchange nor its Market Regulator (as that term is defined in the policies of the Canadian Securities Exchange) accepts responsibility for the adequacy or accuracy of this release.

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