American Uranium (ASX: AMU) Completes Lo Herma Drilling, Setting Up Resource Upgrade and Scoping Study

Key Highlights

• American Uranium has completed a 50-hole, 12,757-metre drilling campaign at its Lo Herma ISR Uranium Project in Wyoming.
• Drilling is expected to underpin an updated Mineral Resource Estimate and the company’s maiden Scoping Study in the third quarter of 2026.
• Around 42% of drill holes intersected economic-grade uranium mineralisation, with 13 holes exceeding target grade thickness.
• Shares were trading 6.94% higher at A$0.077 in early afternoon trade.

American Uranium (ASX: AMU) has reached another milestone at its Lo Herma Uranium Project in Wyoming, wrapping up a drilling campaign designed to answer a question that matters long before a mine is built: how much confidence can be placed in the resource beneath the ground?

The company has completed a 50-hole program covering 12,757 metres, with the results expected to feed directly into an updated Mineral Resource Estimate (MRE) and its maiden Scoping Study, both targeted for the third quarter of 2026.

Unlike an exploration update centred on a spectacular drill intercept, this week’s update is about reducing uncertainty. For uranium developers, that can be just as important.

Lo Herma already hosts a 9.45 million-pound U₃O₈ mineral resource. The latest drilling was aimed at confirming uranium continuity within Mine Unit 1, extending mineralisation south of Mine Unit 2 and collecting enough data to upgrade parts of the existing resource from the Inferred category into the higher-confidence Indicated classification.

That distinction carries weight. While Inferred resources point to the presence of mineralisation, Indicated resources provide greater geological confidence and are typically required to support economic studies and future mine planning.

The drilling program appears to have met its objectives. Forty-two per cent of completed holes intersected economic-grade uranium mineralisation, while 13 holes exceeded the company’s target grade thickness. Those results are expected to strengthen the upcoming resource model and help refine plans for in-situ recovery (ISR) mining, the extraction method proposed for Lo Herma.

ISR has become an increasingly attractive approach for suitable uranium deposits because it avoids conventional open pit or underground mining. Instead, uranium-bearing solutions are circulated through permeable rock formations and processed at the surface, often resulting in a smaller environmental footprint and lower operating costs.

Uranium remains one of the strongest long-term commodity themes as countries expand nuclear power generation to support energy security and rising electricity demand. Interest in small modular reactors, along with the rapid growth of energy-intensive artificial intelligence infrastructure, has reinforced expectations that uranium demand will remain resilient over the coming decade. Industry groups including the World Nuclear Association continue to forecast increasing reactor requirements as more nations extend the life of existing plants and approve new projects.

At the time of writing this article, AMU shares were up by 6.94%, trading at $ 0.077. | Source: MarketIndex 

Chief Executive Officer Bruce Lane said the campaign had delivered what management set out to achieve.

“These final drilling results have achieved the key objectives of the program, confirming continuity within Mine Unit 1 and extending mineralisation south of Mine Unit 2. The results are expected to support our upcoming Mineral Resource Estimate update and continued advancement of Lo Herma toward ISR development.”

He added: “With drilling now complete, our focus turns to delivering the updated Mineral Resource Estimate and Q3 2026 Scoping Study, which are expected to further demonstrate Lo Herma’s development potential as a Wyoming ISR uranium project.”

The next few months will likely prove more important than the drilling itself. A larger proportion of Indicated resources could strengthen the project’s development case, while the Scoping Study will provide the first detailed look at potential economics, mine design and future production scenarios.

Those milestones often represent a turning point for junior resource companies. As projects move from exploration into formal economic studies, the conversation shifts from what may exist underground to whether it can be developed commercially.

American Uranium remains an early-stage developer, and significant work still lies ahead. Regulatory approvals, permitting, financing and future feasibility studies all remain part of the journey. Commodity prices will also continue to influence sentiment across the uranium sector.

For now, however, the company has cleared an important hurdle. With drilling complete, attention turns to whether the upcoming resource upgrade and Scoping Study can provide the confidence needed to move Lo Herma further along the path toward development.