Magnum Mining and Exploration OTCID Listing Opens U.S. Market Access

Magnum Mining Opens the Door to U.S. Investors — and the Timing Couldn't Be Better

Magnum Mining and Exploration Limited (ASX: MGU, OTC: MGUFF) has completed its OTCIQ submissions and is now moving toward a Magnum Mining and Exploration OTCID listing for U.S. investors, a step that opens the company's share register to a significantly broader universe of U.S.-based investors. The move comes at a moment when Magnum's project portfolio is generating genuine exploration momentum — a confirmed rare earth elements (REE) discovery in Brazil, high-grade gold and copper results in Arizona, and a newly acquired REE project in Colorado with historically exceptional grades.

This isn't simply a capital markets housekeeping exercise. The OTCID initiative is strategically timed to coincide with what could be a period of meaningful news flow and value creation across all three of Magnum's key projects.

"We believe now is the right time to launch this initiative, given our recent exploration success and the highly active workstreams planned across our Americas-focused portfolio… Magnum is now focused on converting this strong portfolio position into the next phase of value creation for our shareholders." — Managing Director Antonio Vitor

What Is the OTCID Market — and Why Does It Matter for Investors?

For investors unfamiliar with U.S. over-the-counter markets, the OTCID (OTC International Designation) tier is a segment of the OTC Markets Group designed specifically for international companies that are already listed on a qualified foreign exchange, such as the ASX. Inclusion on this tier requires a company to complete formal submissions including the 12g3-2(b) Certification, which allows foreign private issuers to have their securities quoted in the U.S. without a full SEC registration.

Why it matters:

• It dramatically expands the investor audience by making shares accessible to U.S. retail and institutional investors who prefer or require domestic market access
• It improves liquidity by broadening the potential buyer and seller pool
• It strengthens a company's ability to engage U.S. capital markets and strategic groups, which is particularly relevant for an Americas-focused resources company
• It signals a degree of corporate maturity and transparency, given the disclosure requirements involved

Magnum's primary listing remains on the ASX under the ticker MGU, with U.S. OTC trading expected under the symbol MGUFF.

Key glossary terms for this announcement:

A Portfolio Built for This Moment

The OTCID initiative draws its strategic logic from the strength and diversity of Magnum's current project lineup. The company holds three active, Americas-focused projects spanning REE, gold and copper — a portfolio that covers multiple commodity themes of strong interest to U.S. investors right now.

Each project is at a different stage of exploration maturity, giving Magnum multiple near-term catalysts and a diversified risk profile across REE, gold, and copper.

Piracanjuba, Brazil: The REE Discovery Building Scale

The centrepiece of Magnum's portfolio right now is the Piracanjuba Prospect within the broader Azimuth REE Project — a greenfields discovery that has moved quickly from initial concept to confirmed mineralisation.

The Azimuth REE Project covers a reported 900km of the regional Azimuth 125° Lineament across the states of Goiás and Minas Gerais in Brazil, with all leases described as 100% controlled by Magnum.

The Piracanjuba discovery was announced in February 2026. According to the company announcement, what made the initial results particularly compelling:

• The first 13 auger drill holes all intersected and ended within REE mineralisation, despite drill spacing of up to 5km — described by management as a strong indicator of lateral continuity
• Results were returned from within an 85km² geophysical anomaly
• Desorption recoveries reached up to 75% TREO and 94% MREO — the latter figure is particularly significant because magnet REEs (neodymium, praseodymium, dysprosium, terbium) carry the highest commercial value

The discovery was subsequently confirmed as what the company describes as a genuine ionic adsorption clay (IAC) hosted REE system. Furthermore, this deposit type is highly sought after because its clay-bound REE chemistry typically allows for simple, low-cost leaching extraction rather than the energy-intensive processing required for hard-rock REE deposits.

Where Things Stand Now

• An 810-hole, 10,000m auger drilling campaign is underway across the Piracanjuba North, Central and South targets
• The company is targeting an Exploration Target by September 2026 and a maiden JORC Mineral Resource Estimate by November 2026
• Regular batches of assay and desorption results are expected to be released to the market over the coming months

For investors, this suggests a steady cadence of newsworthy updates is anticipated throughout 2026, with two formal resource milestones targeted before year-end.

Parker, Arizona: High-Grade Gold and Copper in a World-Class District

The Parker Copper-Gold Project in La Paz County, western Arizona, adds what the company describes as a very different but equally compelling dimension to Magnum's portfolio.

Located along the southeastern extension of the Walker Lane gold-copper trend — a region the company states hosts up to 50Moz gold, 700Moz silver and 4Mt copper — Parker sits within what management has described as a previously unrecognised mineralised corridor. Historical mining activity at the site is documented back to at least 1909.

The project covers 6.58km² across 79 unpatented federal lode mining claims, with mineralisation reported across three distinct prospect areas.

Select High-Grade Rock-Chip Results Reported by the Company

The three target areas are reported to combine to deliver 5km of prospective strike length, and drill permitting at the Parker Project is described as well advanced. Once permits are received, drilling will provide the first subsurface test of what the surface sampling suggests could be a significant gold-copper system.

The co-occurrence of high-grade gold and copper — including a single sample returning 178g/t Au and 18.30% Cu simultaneously — is described by management as a notable characteristic that points to a potentially rich, structurally controlled mineralised system.

Wet Mountain, Colorado: A U.S. REE Opportunity with Exceptional Historical Grades

The most recently acquired of Magnum's three key projects, the Wet Mountain REE Project in Fremont County, Colorado, adds a third REE exposure to the portfolio — this time in the United States itself.

The project covers 10.46km² across 126 contiguous unpatented federal lode mining claims. According to the company, the area hosts outcropping carbonatite dykes that were sampled extensively by the USGS during the 1950s to 1980s.

Historical USGS sampling highlights reported by the company:

• Peak grades of up to 79,900 ppm (7.99%) TREE recorded from surface samples of carbonatite dykes
• Zones of over 10,000 ppm (1%) TREE are reported across the project area

The company has noted that these are historical results based on USGS sampling, and they must be treated with appropriate caution until resampled using modern techniques, industry-standard procedures and QA/QC controls. However, the historical data is presented by management as providing a compelling basis for further investigation.

Carbonatite-hosted REE deposits are among the most recognised globally as commercial REE sources. A U.S.-based carbonatite REE project with grades of this historical magnitude warrants genuine investor attention — even as the company works through the process of modern verification.

Understanding Ionic Adsorption Clay REE Deposits — The Key Concept Behind Piracanjuba

Of the three projects, the Piracanjuba IAC REE discovery is arguably the most technically distinctive. Understanding why IAC deposits are viewed so favourably by the resources industry helps frame why Magnum's discovery has attracted attention.

What Is an IAC REE Deposit?

Ionic adsorption clay (IAC) REE deposits form when REEs are chemically weathered out of parent rocks over millions of years and become adsorbed (loosely bound) onto clay minerals in the weathered profile. Because the REEs are not locked into hard mineral structures, they can be extracted simply by passing a mild salt solution through the clay — a process called heap leaching or in-situ leaching.

Why Does It Matter to Investors?

1. Lower processing costs — compared to hard-rock REE deposits, which require energy-intensive cracking processes
2. High MREO proportions — IAC deposits tend to be enriched in the most valuable magnet REEs (neodymium, praseodymium, dysprosium, terbium), which are critical for electric vehicle motors and wind turbine generators
3. Faster path to resource estimation — IAC deposits in clay-dominated terrains are often amenable to low-cost auger drilling, allowing rapid resource delineation
4. Proven commercial precedent — the world's dominant REE supply from China is largely sourced from IAC deposits

Magnum's reported desorption recoveries of up to 94% MREO are described by the company as an early but important indicator that the Piracanjuba mineralisation may be amenable to this low-cost processing pathway.

The Catalyst Calendar: What to Watch For

With three active projects and the Magnum Mining and Exploration OTCID listing for U.S. investors now effectively complete, Magnum enters the second half of 2026 with what management describes as a well-populated pipeline of potential news events.

The company has noted that Mineral Resource milestones are subject to exploration results and technical outcomes. Timelines are described as indicative and subject to change.

Why Investors Should Follow Magnum Closely

Magnum is not positioned as a single-project, single-commodity explorer. The Magnum Mining and Exploration OTCID listing for U.S. investors is the framing event for what management presents as fundamentally a story about a company that has constructed a diversified Americas-focused portfolio, now entering a period of active exploration and potential resource delineation across all three fronts simultaneously.

Several characteristics make Magnum worth monitoring closely:

• Multi-commodity, multi-jurisdiction exposure — REE (Brazil and Colorado), gold and copper (Arizona) across three separate projects and two countries
• IAC REE discovery confirmed — not a geophysical anomaly or a historical result, but drilled and confirmed mineralisation with strong desorption recoveries reported
• High-grade gold-copper surface results — 178g/t Au and 18.35% Cu are numbers that command attention in any district, and Parker is located within one of the Americas' most historically productive gold-copper trends
• U.S. REE exposure — the Wet Mountain project adds a domestic U.S. dimension to the REE portfolio that may resonate with investors focused on critical minerals supply chains
• Defined near-term milestones — the September and November 2026 resource targets at Piracanjuba give investors clearly defined events to track
• Improved U.S. market access — the OTCID move signals corporate ambition and broadens the potential investor base at precisely the moment the company is generating its strongest exploration results

Magnum Mining and Exploration (ASX: MGU, OTC: MGUFF) has positioned itself as a multi-commodity, Americas-focused explorer with reported genuine exploration momentum across rare earths, gold and copper. With a confirmed IAC REE discovery in Brazil advancing toward maiden resource estimation, high-grade gold-copper results driving Parker toward drilling, and a newly acquired U.S. REE project in Colorado, the company is entering a period of significant news flow. The Magnum Mining and Exploration OTCID listing for U.S. investors ensures that this story is now directly accessible — and with multiple milestones targeted before year-end, there is good reason to pay close attention.

Want to Know More About Magnum Mining's Americas-Focused Portfolio?

With a confirmed REE discovery in Brazil advancing toward maiden resource estimation, high-grade gold and copper results driving the Parker Project toward drilling, and a newly acquired U.S. REE project in Colorado, Magnum Mining and Exploration (ASX: MGU, OTC: MGUFF) is entering one of its most active exploration periods to date. Investors looking to follow the company's progress across all three projects — and track the defined milestones targeted before year-end — can learn more by visiting the official Magnum Mining and Exploration website at www.mmel.com.au.