Vault Strategic Mining Corp. to Establish U.S. Subsidiary for Historical Mine Assets, Pursues SAM.gov Registration

Vancouver, British Columbia — July 3, 2026 — Leads & Copy — Vault Strategic Mining Corp. (TSXV: KNOX) (OTC: KNXFF) (FSE: M850) (WKN: A41WE4) announced its intention to establish a wholly owned subsidiary to manage and advance its U.S.-based historical mine assets. This strategic move is part of a broader review of the company's project portfolio and aims to provide a dedicated corporate structure for its critical mineral-focused U.S. assets.

The proposed subsidiary is expected to enhance operational efficiency, facilitate project-level planning, and support future collaborations with U.S.-based strategic partners, agencies, contractors, and industry participants involved in strengthening domestic critical mineral supply chains. Vault also plans to apply for a Unique Entity ID (UEI) through SAM.gov, a system used by the U.S. federal government to identify entities engaging with federal contracting, assistance, and other government programs. The company believes this process may position Vault and its subsidiary to better evaluate opportunities related 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.”

Vault’s U.S. historical mine portfolio comprises strategic mineral assets in established mining jurisdictions with prior production or exploration activity. The company's objective is to evaluate these assets using modern exploration techniques, develop a deeper technical understanding of their potential, and assess opportunities that could contribute to resilient North American critical mineral supply chains.

The company cautioned that the formation of the subsidiary, the UEI application, and any related registrations are subject to completion, and there is no assurance of receiving any government funding, contracts, grants, strategic partnerships, or other benefits from these initiatives.

In other news, Vault announced an amendment to its Letain Nickel Project agreement with 1240089 BC Ltd. and 1258713 BC Ltd. Under the amendment, remaining project payments will be satisfied 50% in cash and 50% in common shares of the Company. The share portion will be priced at the closing price of Vault’s common shares on the trading day immediately preceding the payment due date. This amended payment structure applies to outstanding project payments, including the second-anniversary payment of $50,000 (split $25,000 cash, $25,000 shares) and the third-anniversary payment of $115,000 (split $57,500 cash, $57,500 shares). The amendment does not alter the timing of payments, original share consideration, quarterly royalty payments, or royalty repurchase terms, unless otherwise agreed in writing.

Additionally, Vault entered into an amendment agreement with American Mining Claims LLC concerning the Robinson Dyke Property. The amendment reduces the net smelter returns royalty payable upon exercise of the option from 2.5% to 1.5%. Vault or its assignee can purchase and extinguish the entire royalty for a one-time cash payment of US$1,000,000. The aggregate Robinson Dyke option payments have been increased by $2,500, from $15,500 to $18,000, payable in five additional monthly installments of $500 each. Previous monthly payments will be credited against the amended total.

Vault also announced a strategic prioritization of the War Bond Tungsten Project following due diligence and an expanded exploration program at the War Bond, Thursday, and Tactite historical tungsten mines in Nevada. The company believes focusing near-term exploration efforts on War Bond offers the clearest path to advancing its U.S. tungsten strategy. Consequently, Vault will cease further exploration and relinquish its option on the Wheeler Tungsten Project and the Mirage-Mariposa Tungsten Project, redirecting its technical, operational, and financial resources to the War Bond Tungsten Project and other assets aligned with its strategy.

Vault Strategic Mining Corp. is a North American resource company focused on acquiring and advancing strategic and critical mineral projects in top-tier mining jurisdictions, emphasizing historical and underexplored assets. 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.

Source: Vault Strategic Mining Corp.