INTEGRA APPOINTS AUSENCO TO LEAD DETAILED ENGINEERING AT DELAMAR, NEPA PUBLIC SCOPING PERIOD UNDERWAY

TSXV: ITR; NYSE American: ITRG www.integraresources.com VANCOUVER, BC, June 2, 2026 /PRNewswire/ - Integra Resources Corp. ("Integra" or the "Company") (TSXV: ITR) (NYSE American: ITRG) is pleased to announce the appointment of Ausenco Engineering USA South Inc. ("Ausenco") as lead engineering partner for detailed engineering activities at the Company's DeLamar Project ("DeLamar" or the "Project") in southwestern Idaho. As part of the engagement, Ausenco has retained SLR Consulting ("SLR"), which brings specialized heap leach engineering, metallurgy, and mine planning expertise to the Project.