Resolution Minerals (ASX:RML) Fast-Tracks U.S. Antimony Strategy with Tribeca Capital Appointment and Metallurgy Program Launch

Jane Morgan Management

22 October 2025 – Sydney, Australia | Resolution Minerals Limited (ASX: RML; OTCQB: RLMLF) (“Resolution”) is accelerating its downstream strategy in the U.S., aligning with national ambitions to secure critical mineral supply chains. The Company has commenced a comprehensive metallurgical program on high-grade antimony ore samples from its Horse Heaven Gold-Antimony-Silver-Tungsten Project in Idaho and appointed Tribeca Capital as Corporate Adviser to drive U.S. market engagement and development.

High-grade surface samples from the Antimony Ridge area have been dispatched to Kingston Process Metallurgy (KPM), a Canada-based chemical process development firm, for detailed analysis and testwork. Results from these studies will underpin engineering design, bulk sampling, and product specification work aimed at producing 100% American-made antimony.

Recent assays from Antimony Ridge returned standout grades of up to 49.8% antimony (Sb), 1,420 g/t silver (Ag), and 3.12 g/t gold (Au), reinforcing the project’s potential to deliver premium-grade feedstock for the U.S. defense and energy sectors. Horse Heaven is situated in the historically significant Stibnite Mining District, positioning it strategically to support the United States’ efforts to rebuild domestic supply chains for critical minerals.

Resolution’s engagement with KPM will define optimal concentration pathways and processing options for the ore. This initiative marks a significant milestone as the company progresses toward reactivating the past-producing Horse Heaven asset and supplying the U.S. Government with domestic antimony.

Strategic Adviser to RML, Brett Lynch, stated: “Partnering with KPM allows us to rapidly advance our understanding of the detailed chemical and mineralogical characteristics of Horse Heaven Antimony ore required to design a robust concentration flowsheet. These results will guide our next stages of metallurgical testwork and help frame early product specifications for future engineering studies. KPM is a highly-qualified and experienced partner to assist us with this process.”

The metallurgical program will include:

• Comprehensive chemical assays via ICP-OES;

• Mineralogical phase identification through XRD and Mineral Liberation Analysis (MLA);

• Bench-scale concentration and processing testwork.

Resolution aims to establish itself as one of the first U.S.-based producers of military-grade and energy-grade antimony, aligning its strategy with the White House’s critical minerals and national defense agenda.

Tribeca Capital Joins as Strategic Adviser

Tribeca Capital has been appointed to assist with Resolution’s expansion in the U.S. market, including facilitating the company’s upcoming Nasdaq listing, anticipated for early 2026. With the first draft of the F-20 Form completed and U.S. legal counsel engaged, Resolution’s listing preparations are well underway.

Tribeca Capital will also support Resolution in sourcing offtake and processing partnerships, identifying acquisition and M&A opportunities, strengthening government engagement, and recruiting high-level executive talent.

Raymond Gonzalez, Managing Director Corporate Advisory, Tribeca Capital, commented: “We are extremely excited to be partnered with Resolution Minerals on their journey within the US. Resolution has real potential to be one of the key leaders within the US in meeting the Trump Administration’s critical minerals national security agenda. In a very short time RML has already begun completing major milestones in setting up its Horse Heaven project to become one of the first producing critical minerals assets in the US to supply the US Government with output. I’ve been extremely impressed with the company’s ability to secure these past-producing tungsten, antimony and gold mines, and the work completed to date that has brought RML to the front of the race in developing a supply chain solution for the White House.”

Next Steps

Resolution is focused on fast-tracking the Horse Heaven Project back into production and is pursuing:

• U.S. government funding and FAST-41 permitting;

• Expanded exploration including drilling and sampling;

• Strategic and commercial partnerships in the critical minerals sector;

• Ongoing testwork to refine production processes.

For media enquiries, please contact:

Aharon Zaetz
Executive Director
Resolution Minerals Ltd
E: [email protected]

Jane Morgan
Investor Relations
Jane Morgan Management
E: [email protected]

About Resolution Minerals Limited

Resolution Minerals Limited (ASX: RML; OTCQB: RLMLF) is focused on critical defense minerals at a critical time, together with gold and silver, aiming to deliver a solution for domestic antimony supply to the US defense industry. The Horse Heaven Gold-Antimony-Silver-Tungsten project in Idaho, is Resolution's flagship project, adjoining Perpetua's US$2.8 billion market value Stibnite antimony-gold project. The company is led by an experienced team with proven success in corporate finance, marketing, metallurgy and geoscience which equips Resolution Minerals with the tools to meet the changing demands of the mining markets. The Company’s portfolio includes the Horse Heaven Gold-Antimony-Tungsten-Silver Project in Idaho, USA, and interests including the 64North Project in Alaska and the Drake East and George antimony, gold and uranium projects in Australia.

Jane Morgan
Jane Morgan Management
Investor & Media Relations
[email protected]