Transition Metals Corp. (TSX-V: XTM) together with 1930153 ON Ltd. a private Ontario corporation, collectively the “Vending Parties”, are pleased to announce the joint sale of their respective 50% interests in the Fostung Tungsten Property to UAMY Cobalt Corporation a wholly owned subsidiary of United States Antimony Corporation (NYSE: UAMY), a public company listed on the New York Stock Exchange.

Transaction Summary

Under the terms of the Agreement dated June 26^th, 2025, UAMY has acquired a 100% undivided interest in the Property from the Vending Parties for total consideration of US$5,000,000 in cash (approximately C$7.0 million) and the grant of a 0.5% Net Smelter Return (NSR) royalty. Proceeds from the transaction will be split equally between Transition and 1930153 ON, each receiving US$2,500,000 and 0.25% NSR for their respective 50% interests in the Property. The sale constitutes an arm’s length transaction between all three entities. No Finders’ Fees were paid in relation to this transaction.

Scott McLean, CEO of Transition Metals, commented: “We are pleased to transact with UAMY, a leading strategic critical metals company which is well positioned to advance Fostung for the benefit of stakeholders, including the nearby communities of Espanola and Sudbury. The proceeds from the sale of just one of our 18 projects highlights the depth of our portfolio, which includes multiple mineral exploration projects, royalties, milestone payments, and marketable securities. Furthermore, this transaction shows the benefit of our ability to utilize our portfolio to generate non dilutive cash to help us advance key projects like Pike Warden and Saturday Night.”

Mark Trevisiol, P.Eng., President of 1930153 Ontario Ltd., commented: “China controls over 80% of the world’s tungsten production and has put restrictions on its export to foreign countries. Classified as a critical mineral, Ontario is fortunate to have a tungsten deposit of this size to counter the control of this important alloying element. UAMY, a North American-based company and a leader in the mining and processing of critical minerals brings both the necessary company values and financial strength to develop the property in a sustainable method benefiting all stakeholders.”

About the Fostung Property

The Fostung Property consists of 50 mining claims covering approximately 1,114 hectares. The Property lies within Foster Township in the Sudbury Mining District of Ontario, Canada, approximately 8 kilometres southeast of the town of Espanola. An all-weather gravel road provides excellent access from the property to Espanola, where Trans-Canada Highway #17 is located. The city of Sudbury is located approximately 70 kilometres to the northeast.

The Property hosts a near surface historic inferred mineral resource, estimated in 2007 by SRK Consulting, of 12.4 million tonnes grading 0.213% WO₃, using a cut-off grade of 0.125%¹. SRK based this estimate on data from a total of 44 diamond drill holes totaling 9,185 metres.

¹ Source: NI 43-101 Technical Report on Resources, Golden Predator Mines Inc., Fostung Project, Foster Township, Ontario, Canada. Prepared by SRK Consulting, November 30, 2007.

The Company advises that a Qualified Person has not completed sufficient work to classify the historical estimate as a current mineral resource or mineral reserve, and the Company is not treating the historical estimate as such. The Company has not independently verified the sample data or grades presented in the historical estimate and considers them to be historical in nature. Furthermore, Transition has not undertaken the necessary work to verify or upgrade the historical estimate and has not assessed the amount of work required to do so. The Company is also unaware of any more recent mineral resource estimates; however, Transition is aware that UAMY plans to commission an updated technical report, compliant with SEC SK 1300 regulations, which may include results from recent exploration programs conducted on the Property by the Vending Parties.

A portion of the Property is subject to an underlying 1% Net Smelter Return (NSR) royalty, with UAMY retaining the right to buy back 0.5% of the NSR for CAD $500,000 (see news release dated November 14, 2019).

Qualified Person

The scientific and technical content of this release has been reviewed and approved by Mr. Benjamin Williams, P.Geo. (PGO), Senior Geologist at Transition Metals Corp. and a Qualified Person as defined by NI 43-101. In addition, the scientific and technical content of this release has also been reviewed and approved by Mr. Mark Trevisiol, P.Eng. (PEO), President of 1930153 Ontario Ltd, and a Qualified Person as defined by NI-43-101.

About Transition Metals Corp.

Transition Metals Corp. (TSX-V: XTM) is a Canadian-based, multi-commodity explorer. Its award-winning team of geoscientists has extensive exploration experience which actively develops and tests new ideas for discovering mineralization in places that others have not looked, often allowing the Company to acquire properties inexpensively. Joint venture partners earn an interest in the projects by funding a portion of higher-risk drilling and exploration, allowing Transition to conserve capital and minimize shareholder’s equity dilution.

About 1930153 ON Ltd.

1930153 ON Ltd. is a private Sudbury-based company with interests in Northern Ontario properties, that is focused on advancing mineral projects in Ontario in part by applying modern extraction and processing technologies.

About United States Antimony Corporation

United States Antimony Corporation and its subsidiaries in the U.S., Mexico, and Canada sell antimony, zeolite, and precious metals primarily in the U.S. and Canada. USAC processes third party ore primarily into antimony oxide, antimony metal, antimony trisulfide, and precious metals at its facilities located in Montana and Mexico. Antimony oxide is used to form a flame-retardant system for plastics, rubber, fiberglass, textile goods, paints, coatings, and paper, as a color fastener in paint, and as a phosphorescent agent in fluorescent light bulbs. Antimony metal is used in bearings, storage batteries, and ordnance. Antimony trisulfide is used as a primer in ammunition. USAC also recovers precious metals, primarily gold and silver, at its Montana facility from third party ore. At its Bear River Zeolite facility located in Idaho, the Company mines and processes zeolite, a group of industrial minerals used in water filtration, sewage treatment, nuclear waste and other environmental cleanup, odor control, gas separation, animal nutrition, soil amendment and fertilizer, and other miscellaneous applications. USAC has acquired mining claims and leases located in Alaska and Ontario, Canada and leased a metals concentration facility in Montana in 2024 that could expand its operations as well as its product offerings.