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Vancouver, British Columbia - July 3, 2026 - TheNewswire - Vault Strategic Mining Corp. (TSXV: KNOX) (OTC: KNXFF) (FSE: M850) ( WKN: A41WE4)  ("Vault" or the "Company")  is pleased to announce that the Company intends to form a wholly owned subsidiary to hold, manage, and advance its portfolio of U.S.-based historical mine assets as part its broader project portfolio review.

The proposed subsidiary is expected to provide Vault with a dedicated corporate structure for its U.S. historical mine portfolio, including its critical mineral-focused assets in the United States. The Company believes this structure will support operational efficiency, project-level planning, and future engagement with U.S.-based strategic partners, agencies, contractors, and industry participants focused on strengthening domestic critical mineral supply chains.

Vault also announces that it intends to apply for a Unique Entity ID (“UEI”) through SAM.gov. The UEI is used within the U.S. federal system to identify entities that seek to engage with federal contracting, assistance, and other government-related programs. Subject to the completion of applicable registrations and approvals, the Company believes this process may position Vault and/or its proposed U.S. subsidiary to better evaluate opportunities connected to U.S. critical mineral initiatives.

“Establishing a dedicated subsidiary for our U.S. historical mine portfolio is an important step in organizing these assets for future growth,” said Quinn Field-Dyte, Chief Executive Officer of Vault Strategic Mining. “As governments continue to prioritize secure domestic sources of critical minerals, Vault is taking practical steps to ensure the Company is positioned to engage with potential U.S. government, industry, and strategic partners where appropriate.”

The Company’s U.S. historical mine portfolio is focused on strategic mineral assets located in established mining jurisdictions with historical production or exploration activity. Vault’s objective is to evaluate these assets using modern exploration techniques, build a stronger technical understanding of their potential, and assess opportunities that may support the development of resilient North American critical mineral supply chains.

The Company cautions that the formation of the proposed subsidiary, the application for a UEI, and any related registrations remain subject to completion. There can be no assurance that the Company will receive any government funding, contract, grant, strategic partnership, or other benefit as a result of these initiatives.

Amendment to Letain Nickel Project Agreement

The Company also announces that it has entered into an amending agreement with 1240089 BC Ltd. and 1258713 BC Ltd. in respect of the Letain Nickel Project mineral claims purchase and sale agreement, originally made effective February 10, 2025. Pursuant to the amendment, certain remaining project payments under the agreement will be satisfied 50% in cash and 50% in common shares of the Company, with the share portion priced at the closing price of the Company’s common shares on the trading day immediately prior to the applicable payment due date.

The amended payment structure applies to the outstanding project payments currently contemplated under the agreement, including the $50,000 second-anniversary payment and the $115,000 third-anniversary payment. As amended, the $50,000 payment will be satisfied as to $25,000 in cash and $25,000 in common shares, and the $115,000 payment will be satisfied as to $57,500 in cash and $57,500 in common shares, in each case based on the applicable closing price.

The amendment does not change the timing of the applicable project payments and does not amend the original share consideration, quarterly royalty payments, or any royalty repurchase or buy-down payments, unless otherwise expressly agreed to in writing by the parties. The issuance of any shares pursuant to the amendment remains subject to applicable securities laws, exchange acceptance or approval, if required, and any applicable hold periods or resale restrictions. Except as expressly amended by the amending agreement, the original agreement remains unchanged and in full force and effect.

Amendment to Robinson Dyke Property Option Agreement

The Company also announces that it has entered into an amendment agreement with American Mining Claims LLC in respect of the Robinson Dyke Property, being one of the properties subject to the Mineral Property Option Agreement dated January 14, 2026 among American Mining Claims LLC, Stream Metals LLC and Vault Strategic Mining Corp.

The amendment also reduces the net smelter returns royalty payable to American Mining Claims LLC upon exercise of the Robinson Dyke option from 2.5% to 1.5%. Vault or its assignee will have the right, exercisable at any time in one transaction, to purchase and extinguish the entirety of the royalty for a one-time cash payment of US$1,000,000.

Pursuant to the amendment, the parties have agreed to increase the aggregate Robinson Dyke option payments by $2,500, from $15,500 to $18,000. The increase will be paid in five additional monthly instalments of $500 each, and all monthly payments previously made by Vault to American Mining Claims LLC under the original agreement will be credited against the amended aggregate payment amount.

Strategic Prioritization of War Bond Tungsten Project

The Company also announces that, following due diligence, including its recently expanded exploration program at the War Bond, Thursday and Tactite historical tungsten mines in Nevada, it has determined to prioritize the War Bond Tungsten Project in terms of the Company’s tungsten exploration effort. Based on the Company’s technical review, field work, strategic assessment and capital allocation priorities, Vault believes that focusing its near-term exploration efforts on War Bond provides the clearest path to advancing its U.S. tungsten strategy.

As part of this strategic prioritization, the Company has determined that it will no longer pursue further exploration or its option on the Wheeler Tungsten Project (announced Jan 21, 2026) and the Mirage-Mariposa Tungsten Project (announced May 8, 2026). The Company intends to focus its technical, operational and financial resources on the War Bond Tungsten Project and other assets within its portfolio that management believes are best aligned with Vault’s strategy of advancing high-priority critical mineral opportunities in North America.

About Vault Strategic Mining Corp.

Vault Strategic Mining Corp. 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. Investors and Stakeholders are encouraged to follow the company on its Linkedin , X.com and subscribe for updates at https://vaultstrategic.com/ .

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

Data Verification

Historical information referenced in this release has been reviewed against available reports; however, such data cannot be independently verified to current NI 43-101 standards and quality control procedures and are therefore considered supportive for exploration guidance only. The Company cautions that past results or production from properties in proximity to The Company may not necessarily be indicative of mineralization on the Company’s properties.

Qualified Person

Mr. William Feyerabend, CPG, an independent Consulting Geologist and a Qualified Person as defined under National Instrument 43-101, has reviewed and approved the disclosure in this news release for consistency with NI 43-101 reporting requirements.

On behalf of the Board:

Vault Strategic Mining Corp.

" Quinn Field-Dyte "

Chief Executive Officer & Director

Tel: 604.343.4338 | Email: info@vaultstrategic.com

ANY SECURITIES REFERRED TO HEREIN WILL NOT BE REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933 (THE "1933 ACT") AND MAY NOT BE OFFERED OR SOLD IN THE UNITED STATES OR TO A U.S. PERSON IN THE ABSENCE OF SUCH REGISTRATION OR AN EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE 1933 ACT.

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

Disclaimer for Forward-Looking Information

This news release contains forward-looking information and forward-looking statements within the meaning of applicable Canadian securities laws concerning Vault Strategic Mining Corp. (“Vault” or the “Company”) and the War Bond Tungsten Project. Forward-looking information in this news release includes, but is not limited to, statements regarding the Company’s Phase 2 exploration planning at the War Bond Tungsten Project; the submission of samples for laboratory analysis; the timing and receipt of analytical results; the interpretation of Phase 1 reconnaissance and sampling work; potential future field validation, mapping, sampling, target refinement and drill target generation; the Company’s ability to complete additional exploration work; and the Company’s future plans, objectives and expectations. Forward-looking information is often, but not always, identified by words such as “plans”, “expects”, “is expected”, “intends”, “anticipates”, “believes”, “proposes”, “estimates”, “may”, “could”, “would”, “might”, “will”, “potential”, “target”, “advance”, “prepare” and similar expressions, or statements that certain actions, events or results may, could, would, might or will occur or be achieved. Forward-looking information is based on the current expectations, estimates, assumptions and projections of management as of the date of this news release. Such information is subject to known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements to differ materially from those expressed or implied by the forward-looking information. These risks and uncertainties include, but are not limited to, risks inherent in mineral exploration and development; uncertainty regarding the interpretation of exploration results; delays in receiving laboratory results; the possibility that future exploration may not confirm historical information, identify mineralization or generate drill targets; changes in exploration plans or budgets; the availability of personnel, contractors and equipment; permitting and regulatory risks; commodity price volatility; market conditions; financing risks; title and property risks; environmental risks; general economic conditions; and other risks associated with the resource industry. Although the Company believes that the assumptions and expectations reflected in the forward-looking information are reasonable, no assurance can be given that such assumptions or expectations will prove to be correct. Forward-looking information contained in this news release is made as of the date hereof and should not be relied upon as representing the Company’s views as of any date subsequent to the date of this news release. Except as required by applicable securities laws, the Company undertakes no obligation to update or revise any forward-looking information, whether as a result of new information, future events or otherwise.

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