Vault Strategic Mining to Acquire Mirage-Mariposa Tungsten Mine

Vancouver, British Columbia — May 11, 2026 — Leads & Copy — Vault Strategic Mining Corp. (TSXV: KNOX) (OTC: KNXFF) (FSE: M850) (WKN:A41WE4) has entered into a definitive mineral property purchase agreement to acquire a 100% interest in the historical Mirage-Mariposa Tungsten Mine, included within the Gray Eagle Project in Inyo County, California, and the North Tungsten Project in Nunavik, Quebec.

The Gray Eagle Project comprises 33 contiguous unpatented lode claims totaling approximately 681.8 acres, located about 10 kilometers east of Bishop, California. The project features multiple mineralized prospects developed along a granite-limestone contact, an environment associated with tungsten skarn mineralization and hydrothermal precious-metal vein systems.

According to the U.S. Geological Survey (USGS), the Mirage-Mariposa Mine is a past-producing tungsten and silver site. The USGS Mineral Resource Data System identifies tungsten as the primary commodity and silver as a tertiary commodity. The site is also known as the Golden Mirage and Mariposa Claims, Wooley Mine, Black Canyon RARE II Area, and Golden Mirage Mine.

The USGS record describes the deposit as associated with replacement-style and disseminated mineralization, with contact metasomatic processes noted as the primary mode of origin. Minerals and materials reported include scheelite, garnet, epidote, quartz, and argentite.

Historical resources at the Mirage-Mariposa are reported by the USGS record as approximately 21,000 indicated tons and 34,400 inferred tons, with an average grade of 0.15% tungsten trioxide. The record also notes historical underground and surface workings, including a 17-foot deep shaft, a 40-foot-wide glory hole, and approximately 70 feet between the west end of the underground workings at the shaft and the headwall.

Vault Strategic Mining may acquire a 100% interest in the Gray Eagle Project for US$380,000 in staged cash payments and the grant of a 2.0% net smelter return royalty to the vendors, pending TSX Venture Exchange approval.

Quinn Field-Dyte, CEO of Vault Strategic Mining Corp., said the company is excited to add the historical Mirage-Mariposa Tungsten Mine to its U.S. historical mine portfolio, citing its combination of tungsten and precious metals in a skarn environment. Field-Dyte added that with multiple mineralized zones and no modern drilling, there is a clear opportunity to apply modern exploration techniques. He added the company looks forward to engaging with potential exploration crews to get exploration underway at Mirage-Mariposa.

Vault Strategic Mining Corp. is focused on acquiring and advancing strategic and critical mineral projects in North America. The company emphasizes historical and underexplored assets. Vault Strategic Mining Corp. trades on the TSX Venture Exchange (TSXV: KNOX), OTC Markets (OTCID: KNXFF), and the Frankfurt Stock Exchange (FSE: M850).

Mr. William Feyerabend, a Qualified Person as defined under National Instrument 43-101, has reviewed and approved the disclosure in this release.

Source: Vault Strategic Mining