Osisko Metals Incorporated (TSX: OM) (OTCQX: OMZNF) (FRANKFURT: OB51) is pleased to announce the successful closing of a non-brokered private placement financing, pursuant to which the Company issued an aggregate of 9,461,840 common shares of the Company that will qualify as “flow-through shares” (within the meaning of subsection 66(15) of the Income Tax Act (Canada) and section 359.1 of the Taxation Act (Québec)) at a price of C$2.64 per Flow-Through Share for gross proceeds to the Company of C$24,979,257.60. The Offering was conducted as a structured flow-through share transaction arranged by PearTree Securities Inc.

The Company will use an amount equal to the gross proceeds from the sale of the Flow-Through Shares under the Offering to incur eligible “Canadian exploration expenses” that will qualify as “flow-through critical mineral mining expenditures” (as such terms are defined in the Income Tax Act (Canada)), in respect of the Company’s projects in Québec. The Qualifying Expenditures will be incurred on or before December 31, 2027 and will be renounced by the Company to the initial purchasers of the Flow-Through Shares with an effective date no later than December 31, 2026.

The Company understands that Agnico Eagle Mines Limited and Hudbay Minerals Inc., two of its existing strategic investors, have purchased, as part of a follow-on transaction to the issuance of the Flow-Through Shares, all of the Common Shares issued under the Offering.

The Flow-Through Shares issued under the Offering are subject to a hold period expiring four months and one day from the date of issuance, pursuant to applicable Canadian securities laws. The Offering remains subject to final acceptance of the Toronto Stock Exchange.

This news release does not constitute an offer to sell or a solicitation of an offer to buy any of the securities in the United States. The securities have not been and will not be registered under the U.S. Securities Act of 1933, as amended (the “U.S. Securities Act“), or any state securities laws and may not be offered or sold within the United States or to or for the account or benefit of a U.S. person (as defined in Regulation S under the U.S. Securities Act) unless registered under the U.S. Securities Act and applicable state securities laws or an exemption from such registration is available.

About Osisko Metals

Osisko Metals Incorporated is a Canadian exploration and development company creating value in the critical metals sector, with a focus on copper and zinc. The Company acquired a 100% interest in the past-producing Gaspé Copper mine from Glencore Canada Corporation in July 2023. The Gaspé Copper Project is located near Murdochville in Québec’s Gaspé Peninsula. The Company is currently focused on resource expansion of the Gaspé Copper deposits, with current pit-constrained Measured and Indicated Mineral Resources of 1.83 Bt averaging 0.32% CuEq and Inferred Mineral Resources of 239 Mt averaging 0.46% CuEq (in compliance with NI 43-101). For more information, see the technical report titled “NI 43-101 Technical Report on the Gaspé Copper Project with an Updated Mineral Resource Estimate for the Copper Mountain Deposit, Québec, Canada” dated May 28, 2026 (with an effective date of January 17, 2026), a copy of which is available on SEDAR+ (www.sedarplus.ca) under Osisko Metals’ issuer profile. Gaspé Copper hosts the largest undeveloped copper resource in eastern North America, strategically located near existing infrastructure in the mining-friendly province of Québec.

In addition to the Gaspé Copper Project, the Company is working with Appian Capital Advisory LLP through the Pine Point Mining Limited joint venture to advance one of Canada’s largest past-producing zinc mining camps, the Pine Point project, located in the Northwest Territories. The current mineral resource estimate for the Pine Point project consists of Indicated Mineral Resources of 49.5 Mt averaging 5.52% ZnEq and Inferred Mineral Resources of 8.3 Mt averaging 5.64% ZnEq (in compliance with NI 43-101). For more information, see the technical report titled “NI 43-101 Technical Report, Pine Point Zinc-Lead Project, Mineral Resource Estimate Update, Hay River, Northwest Territories, Canada” dated August 9, 2024 (with an effective date of May 31, 2024), a copy of which is available on SEDAR+ (www.sedarplus.ca) under Osisko Metals’ issuer profile. The Pine Point project is located on the south shore of Great Slave Lake, Northwest Territories, close to infrastructure, with paved road access, an electrical substation and 100 kilometres of viable haul roads.