Integra Resources Corp.

Integra Resources Corp. announced the results of its updated Feasibility Study for the Florida Canyon Mine, projecting an after-tax NPV of $601 million. The study outlines an extended 8-year active mine life, increasing annual gold production by 17% to 82 Koz, and anticipates $92 million in growth capital investments to expand heap leach capacity and modernize the fleet. These updates reflect a material transformation of the mine, aiming for a more stable and predictable production profile with a Life-of-Mine (LOM) site-level AISC of $2,331/oz.

Integra Resources Corp. announced the voting results from its Annual General Meeting of Shareholders held on June 26, 2026. Shareholders approved setting the number of directors at eight, elected all eight nominated directors, and re-appointed BDO Canada LLP as auditors. Additionally, the Amended and Restated Equity Incentive Plan was approved, which includes reservations for incentive stock options, restricted share units, and deferred share units.

Integra Resources Corp. announced the results of an updated Technical Report Feasibility Study for its Florida Canyon Mine in Nevada. The study projects a substantial increase in mineral reserves, with Proven and Probable Mineral Reserves rising by 74% to 1.19 million ounces of gold. The mine's life is extended through 2033, with annual gold production increasing by 17% to an average of 82 thousand ounces, expected to generate over $0.8 billion in after-tax free cash flow. While 2026 site-level AISC guidance is revised upwards to $3,300-$3,500/oz due to increased mining rates and inflationary pressures, the long-term outlook shows lower costs and enhanced economics.

Integra Resources Corp. has appointed Ausenco Engineering USA South Inc. as the lead engineering partner for detailed engineering activities at its DeLamar Project in Idaho. Ausenco has engaged SLR Consulting for specialized heap leach engineering and mine planning. This move coincides with the launch of the 30-day public scoping period for the National Environmental Policy Act (NEPA) review process, following the Notice of Intent publication by the BLM on May 29, 2026. Detailed engineering is expected to continue through Q1 2027, with long-lead procurement starting in H2 2026, and the final EIS and ROD anticipated in H2 2027.

Integra Resources Corp. announced that the U.S. Bureau of Land Management published the Notice of Intent (NOI) in the Federal Register for its DeLamar Project in Idaho. This marks a significant permitting milestone, formally initiating the National Environmental Policy Act (NEPA) review process and public engagement. The company anticipates the final Environmental Impact Statement (EIS) and Record of Decision (ROD) to be published in the second half of 2027, with the project included in the FAST-41 Transparency Projects Program to streamline the process. This advancement is supported by Idaho's U.S. Senators and Congressman, aiming to boost domestic gold and silver production and create jobs.

Integra Resources Corp. announced the appointment of three seasoned mining executives to its leadership team. Scott Trebilcock joins as Senior Vice President, Corporate Development, Whitney Buhlin as Vice President, Human Resources, and Josh Serfass as Vice President, Business Development & Investor Relations. These appointments are intended to strengthen the leadership team and support the company's next phase of growth as a diversified U.S.-focused gold producer. Additionally, the company granted equity incentive awards, including 177,429 options and 109,882 restricted share units, to certain executives.

Integra Resources Corp. announced its Annual General Meeting (AGM) will be held on Friday, June 26, 2026, at 10:00 a.m. Pacific Time in Vancouver, British Columbia. The company is utilizing "Notice and Access" provisions for proxy material delivery. Shareholders will vote on key resolutions including fixing the number of directors, electing directors, appointing BDO Canada LLP as auditor, and approving the Amended and Restated Equity Incentive Plan.

Integra Resources Corp. has entered into an agreement to grant 517,103 common shares, valued at US$1,500,000, to the Shoshone-Paiute Tribes. This Equity Grant aims to foster a long-term partnership, build consensus for the DeLamar Project, and support the Tribes' economic independence and participation in value creation. The agreement reflects significant collaborative work on project development and environmental monitoring, with completion subject to NYSE American approval.

Integra Resources Corp. reported Q1 2026 net earnings of $12.5 million, a significant increase from $1.0 million in Q1 2025, driven by strong mine operating earnings and a record average realized gold price of $4,854 per ounce. The company's cash and cash equivalents rose to $105.8 million, bolstered by a $57.5 million net proceeds public offering. While gold production was lower and cash costs/AISC were above guidance, Integra filed a Feasibility Study for the DeLamar Project, confirming robust economics with an after-tax NPV5% of $774 million at base case prices, and advanced permitting for its development projects.

Integra Resources Corp. filed a Form 6-K with the SEC on April 29, 2026. This report by the foreign private issuer serves to furnish a news release dated April 29, 2026, as Exhibit 99.1.