Mr. George Salamis reports

INTEGRA FILES FEASIBILITY STUDY TECHNICAL REPORT FOR DELAMAR HEAP LEACH PROJECT

Integra Resources Corp., further to its news release dated Dec. 17, 2025, has filed a feasibility study technical report for its wholly owned DeLamar gold and silver heap leach project, comprising the DeLamar and Florida Mountain deposits, located in southwestern Idaho.

The technical report was prepared in accordance with National Instrument 43-101, Standards for Disclosure for Mineral Projects, with Forte Dynamics Inc. as the lead author and consultant. The technical report, titled "Feasibility Study and Technical Report on the DeLamar Project, Owyhee County, Idaho, USA," dated Feb. 2, 2026, with an effective date of Dec. 8, 2025, has been filed on SEDAR+ and EDGAR. The report is also available on the company's website.

DeLamar heap leach project overview

(all amounts in U.S. dollars unless otherwise stated)

The past-producing DeLamar project, which includes the adjacent DeLamar and Florida Mountain gold and silver deposits, is located in Owyhee county in southwestern Idaho. Since acquiring the project in 2017, the company has demonstrated significant resource growth and conversion while providing robust economic studies in its maiden preliminary economic assessment, prefeasibility study and now feasibility study (FS) in late 2025. The FS for DeLamar confirmed robust economics for a low-cost, large-scale, conventional open-pit oxide heap leach operation, with competitive operating costs and high rate of return. The FS outlines total production of 1.1 million ounces of gold equivalent (AuEq) over a 10-year operating mine life (plus two years of residual leaching), resulting in an average annual production profile of 106,000 ounces AuEq per annum at a co-product mine site all-in sustaining cost (AISC) of $1,480 per ounce (oz) AuEq. The project generates an after-tax net present value (NPV) (at 5 per cent) of approximately $774-million with an after-tax internal rate of return (IRR) of 46 per cent at base case gold and silver prices of $3,000 per oz and $35 per oz, respectively. After-tax NPV (at 5 per cent) improves to approximately $1.9-billion and after-tax IRR to 97 per cent using recent gold and silver prices of $4,500 per oz and $65 per oz, respectively. Refer to the 2025 DeLamar FS announcement news release from Dec. 17, 2025, located on the company's website.

About Integra Resources Corp.

Integra is a growing precious metals producer in the Great basin of the Western United States. Integra is focused on demonstrating profitability and operational excellence at its principal operating asset, the Florida Canyon mine, located in Nevada. In addition, Integra is committed to advancing its flagship development-stage heap leach projects: the past-producing DeLamar project located in southwestern Idaho; and the Nevada North project located in western Nevada. Integra creates sustainable value for shareholders, stakeholders and local communities through successful mining operations, efficient project development, disciplined capital allocation, and strategic merger and acquisition (M&A), while upholding the highest industry standards for environmental, social and governance practices.

Qualified person

The scientific and technical information contained in this news release has been reviewed and approved by James Frost, PEng, director, technical services, of Integra, who is a qualified person as defined in National Instrument 43-101, Standards of Disclosure for Mineral Projects.

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