Osisko Critical Minerals Corporation Announces C$100 Million Private Placement of Special Warrants

Gross Proceeds of $100,000,000 to Fund Exploration and Development of New Brunswick Properties

TORONTO, Sept. 16, 2026 (GLOBE NEWSWIRE) — Osisko Critical Minerals Corporation (“ OCMC ” or the “ Corporation “), a newly incorporated entity and a wholly-owned subsidiary of Osisko Metals Incorporated (“ Osisko Metals “) (TSX: OM; OTCQX: OMZNF; FRANKFURT: 0B51), is pleased to announce a best efforts private placement (the “ Private Placement “) of special warrants of the Corporation (the “ Special Warrants “) at a price of $0.25 per Special Warrant for gross proceeds of $100,000,000. The Private Placement will be led by Canaccord Genuity Corp. (“ Canaccord Genuity “), acting as lead agent and sole bookrunner, on behalf of a syndicate of agents (collectively, the “ Agents “).

Incoming CEO John Burzynski commented: “We are have had a tremendous reception for OCMC in the capital markets, and the strong investor interest in our new critical minerals company reflects confidence in our exploration portfolio and the significant opportunity we see in New Brunswick. We look forward to completing this offering to capitalize this new venture and to advancing our aggressive exploration program on these highly prospective copper assets.”

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Upon satisfaction of the release conditions described below (the “ Release Conditions “), each Special Warrant shall automatically convert, without payment of additional consideration, into one unit of the Corporation (each, a “ Unit “), with each Unit consisting of one common share of the Corporation (each, a “ Common Share “) and one-half of one common share purchase warrant of the Corporation (each whole warrant, a “ Warrant “). Each Warrant will entitle the holder to acquire one Common Share at an exercise price of $0.35 per share for a period of 24 months following the closing date of the Private Placement (the “ Closing Date “).

The Release Conditions shall mean (i) the receipt for a final prospectus (the “ Qualifying Prospectus “) qualifying the distribution of the Common Shares and Warrants underlying the Special Warrants being issued by the securities regulatory authorities in the provinces of Canada in which the Special Warrants are sold; and (ii) the TSX Venture Exchange (the “ Exchange “) granting conditional approval to list the Common Shares and Warrants, on or before the date that is 180 days following the Closing Date.

The Corporation intends to use the net proceeds of the Private Placement to fund: (i) exploration and development costs of the properties located in New Brunswick, Canada (the “ Properties “); and (ii) general working capital and corporate expenses.

The Private Placement is expected to close on or about November 17, 2026 or such other date as may be mutually agreed upon between Canaccord Genuity and the Corporation (the “ Closing Date “).

The Corporation shall use its best efforts to satisfy the Release Conditions as soon as practicable following the Closing Date.