Vanstar Mining Resources Inc. announced that Vanstar has filed a technical report for the Nelligan Joint Venture Project ("Nelligan") (IAMGOLD Corporation ("IAMGOLD"): 75%, Vanstar: 25%), titled "Independent Technical Report for the Nelligan Gold Project, Quebec, Canada" (the 2023 Technical Report) dated February 22, 2023. The 2023 Technical report was prepared by SRK Consulting (Canada) Inc. ("SRK") in accordance with National Instrument 43-101 - Standards of Disclosure for mineral Projects ("NI 43-101"), as reported in the Company's news release dated January 12, 2023. The 2023 Technical Report supersedes the technical report on the Nelligan project dated December 4, 2019.

Subsequent to a review of the pit optimization parameters used to derive a pit shell to constrain Mineral Resource reporting and benchmarking against comparable projects, amendments were made to the mining cost applied to waste material and to the percentage of payable metal applied relative to the Mineral Resource Estimate reported on January 12, 2023. These parameters were reviewed by both IAMGOLD and SRK, and are considered suitable to test the "reasonable prospects for eventual economic extraction" of the Mineral Resource model. The changes resulted to a 21,000 ounce increase in estimated Indicated Mineral Resources and 362,000 ounce increase to Inferred Mineral Resources.