Quantum Announces Participation in the Critical Minerals Institute (CMI) Summit

Vancouver, May 11, 2026 - Quantum Critical Metals Corp. ("Quantum" or the "Company") (TSX.V: LEAP) (OTCQB: ATOXF) (FSE: 86A1) is pleased to announce its participation in the upcoming CMI Summit 5 - "The New Critical Minerals Economy" - taking place May 13-14, 2026, in Toronto, Canada.

The CMI Summit brings together global leaders across the mining, defense, technology, and policy sectors to address the growing demand for secure, sustainable, and resilient supply chains for critical minerals. The event serves as a key forum for collaboration and innovation in the rapidly evolving critical minerals landscape.

Quantum's participation underscores its commitment to strengthening North American critical mineral supply chains and advancing strategic projects that support electrification, advanced manufacturing, and national security priorities.

As part of the Summit program, Marcy Kiesman, CEO & Director of Quantum Critical Metals Corp., will deliver a featured presentation on Day 1 (Wednesday, May 13) from 12:55-1:10 PM titled: "A Modern-Day Explorer's Perspective on the Hidden Geopolitics of Rubidium, Gallium, and Cesium."

The discussion will explore how industry leaders identify, rank, and prioritize the most strategically important critical minerals in an increasingly competitive and geopolitically complex global market.

Marcy Kiesman, CEO of Quantum stated, "We are pleased to participate in the CMI Summit alongside industry leaders and stakeholders focused on securing the future of critical minerals. Quantum continues to advance projects targeting key elements such as rubidium, gallium and other strategic materials, and we look forward to contributing to the important discussions shaping this sector."

The Company will engage with industry participants, investors, and government representatives throughout the Summit, highlighting its portfolio of critical mineral projects in Canada and its role in supporting domestic and allied supply chains. Quantum has aligned itself with the Critical Minerals Institute as part of its broader strategy to collaborate with key industry partners and contribute to the development of a secure and sustainable critical minerals ecosystem.

About the Critical Minerals Institute (CMI):

The Critical Minerals Institute (CMI) is a global think tank for the critical minerals economy, serving as a central hub that connects companies, capital markets, and policymakers, and delivering actionable intelligence through its monthly CMI Masterclasses, weekly Critical Minerals Report (CMR), bespoke research, and board-level advisory services across exploration finance, supply chains, and geopolitics. CMI also organizes its flagship Annual Critical Minerals Institute Summit, a global gathering of government leaders, institutional investors, and industry executives, with the upcoming CMI Summit 5 - "The New Critical Minerals Economy" - scheduled for May 13-14 in Toronto, Canada.

About Quantum Critical Metals Corp.

Quantum Critical Metals Corp. (TSX.V: LEAP) (OTCQB: ATOXF) (FSE: 86A1) is a next generation Canadian mineral exploration company focused on rubidium, gallium, cesium, and silver. Quantum is advancing a high impact exploration portfolio in premier North American jurisdictions. The Company's flagship assets include the NMX East and Discovery Rubidium-Gallium-Cesium Projects in the James Bay region of Québec and the Babine South Silver Project near Burns Lake, British Columbia - two districts with established geological pedigree and growing strategic relevance.

To stay updated on Quantum's latest developments, sign up for our mailing list and visit www.quantumcriticalmetals.com and www.sedarplus.com.

Marcy Kiesman, CEO

Telephone: 604.428.2900 or 604.339.2243

Email: marcykiesman@qcritical.com

Website: www.quantumcriticalmetals.com

Forward-Looking Statements

This news release contains "forward?looking information or statements" within the meaning of applicable securities laws, which may include, without limitation, statements that address the upcoming work programs, and other statements relating to the business, financial and technical prospects of the Company. All statements in this news release, other than statements of historical facts that address events or developments that the Company expects to occur, are forward-looking statements. Although the Company believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance and actual results may differ materially from those in the forward-looking statements.

Such forward-looking information reflects the Company's views with respect to future events and is subject to risks, uncertainties and assumptions, including those filed under the Company's profile on SEDAR at www.sedarplus.com. Factors that could cause actual results to differ materially from those in forward-looking statements include, but are not limited to, continued availability of capital and financing and general economic, market or business conditions. The Company does not undertake to update forward?looking statements or forward?looking information, except as required by law.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

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