Mr. Adam Davidson reports

ARC MINERAL ROYALTIES FILES UPDATED TECHNICAL REPORT FOR MT HENRY GOLD PROJECT

Arc Mineral Royalties Ltd. has filed an updated technical report prepared in accordance with National Instrument 43-101 (Standards of Disclosure for Mineral Projects) relating to the Mount Henry gold project in Western Australia in support of the disclosure outlined in Arc's news release dated Sept. 15, 2026.

The technical report is available under the company's profile on SEDAR+.

About Arc Mineral Royalties Ltd.

Arc Mineral is a mining royalty and streaming company focused on establishing a portfolio of high-conviction royalty assets. Through a strategic partnership with Karri Capital Partners, Arc combines an experienced royalty management team with project development expertise to pursue both traditional royalty transactions and differentiated royalty creation opportunities. Arc's foundational royalty is the 1-per-cent net smelter return royalty over the Mount Henry gold project in Western Australia, with an option to acquire an additional 1-per-cent NSR royalty.