Altius Minerals closes C$181.5 million bought deal offering

Altius Minerals Corporation Closes C$181.5 Million “Bought Deal” Public Offering of Common Shares NOT FOR DISTRIBUTION TO U.S. NEWS WIRE SERVICES OR FOR DISSEMINATION IN THE UNITED STATES Altius Minerals Corporation (TSX: ALS) (OTCQX: ATUSF) (“Altius” or the “Company”) is pleased to announce that it has completed its previously announced bought deal public offering of 3,000,000 common shares of the Company (the “Common Shares”) at a price of C$60.50 per Common Share (the “Issue Price”), for aggregate gross proceeds of C$181,500,000 (the “Offering”). The Offering was conducted by a syndicate of underwriters, with National Bank Financial Inc., Scotia Capital Inc., and TD Securities Inc. acting as co-bookrunners, together with ATB Capital Markets Corp., Canaccord Genuity Corp., Raymond James Ltd. and BMO Capital Markets. The Company intends to use the net proceeds of the Offering to strengthen the Company’s balance sheet following the completion and announcement of several acquisitions to date in 2026 as well as for general corporate purposes.

Together with Altius’ credit facilities that are currently being adjusted and expanded to reflect the integration of its acquisitions, the net proceeds of the Offering will bolster Altius’ liquidity and better position it to consider additional accretive opportunities while maintaining its conservative leverage profile. Cautionary Statements This news release includes certain "forward-looking statements" under applicable Canadian securities legislation. Forward-looking statements are necessarily based upon a number of estimates and assumptions that, while considered reasonable, are subject to known and unknown risks, uncertainties, and other factors which may cause the actual results and future events to differ materially from those expressed or implied by such forward-looking statements.

Forward-looking statements include, but are not limited to, statements regarding the anticipated use of proceeds, future plans, activities, events, objectives, expectations or developments that the Company believes, expects or anticipates will or may occur and may be identified by the use of words such as "believe", "expect", "anticipate", "intend", "plan", "will", "may" and similar expressions. There can be no assurance that such statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements.

When considering this forward-looking information, readers should keep in mind the risk factors and other cautionary statements in the Company's disclosure documents filed with the applicable Canadian securities regulatory authorities on SEDAR+ at www.sedarplus.ca . The risk factors and other factors noted in the disclosure documents could cause actual events or results to differ materially from those described in any forward-looking information. The forward-looking statements contained in this news release are made as of the date hereof.