Mr. Quinn Field-Dyte reports

VAULT STRATEGIC JOINS CANADIAN ASSOCIATION OF DEFENCE AND SECURITY INDUSTRIES IN SUPPORT OF ITS ONGOING ADVANCEMENT OF THE COMPANY'S CRITICAL AND STRATEGIC MINERAL PORTFOLIO

Vault Strategic Mining Corp. has joined the Canadian Association of Defence and Security Industries (CADSI), the national voice of Canada's defence, security and cyber sectors and a key organization supporting collaboration between industry, government and military stakeholders. The company has now joined defence associations both in Canada and in the United States under the National Defence Industrial Association (NDIA) in support of the advancement of its critical and strategic mineral portfolio.

Quinn Field-Dyte, chief executive officer, commented: "Vault's membership with CADSI reflects our commitment to advancing critical mineral opportunities that are aligned with Canada's long-term security, defence and industrial priorities. As global demand for secure and reliable sources of strategic minerals continues to grow, engagement with CADSI provides an important platform for the company to better understand evolving defence supply chain requirements, contribute to national resilience and position Vault's North American critical minerals portfolio within the broader framework of Canada's security interests."

Membership in CADSI provides the company with access to defence industry forums, policy roundtables, technical workshops, and networking opportunities that support collaboration across Canada's defence and security community. Participation in CADSI will help the company remain informed on emerging capability needs, procurement trends, regulatory considerations, and partnership opportunities relevant to critical minerals and advanced materials vital to national and allied security.

Market awareness clarification

Further to the company's news release dated May 15, 2026, the company wishes to clarify certain disclosure regarding its marketing services agreement with Capitaliz Marketing Inc. The company confirms that neither Capitaliz nor its principals currently hold any securities of the company. Capitaliz is an arm's-length party to the company.

The company further clarifies that the initial $50,000 budget payable to Capitaliz under the agreement is being paid in advance. As previously disclosed, the agreement has an initial term of one month, and the company may approve additional allocations up to a total budget of $200,000.

The agreement remains subject to acceptance by the TSX Venture Exchange.

About Vault Strategic Mining Corp.

Vault Strategic Mining is a North American resource company focused on the acquisition and advancement of strategic and critical mineral projects located in top-tier mining jurisdictions. The company emphasizes historical and underexplored assets with potential for value creation through modern exploration and disciplined development.

Vault Strategic Mining trades on the TSX-V (TSX-V: KNOX), OTC Markets (OTCID: KNXFF) and the Frankfurt Stock Exchange (FSE: M850).

We seek Safe Harbor.