Highlights

  • RMXFF listed on the US OTCQB and reached AUD 0.054 (USD 0.035), up 36% on debut.
  • US-based investor participation and trading volumes were high on RMXFF’s first day.
  • RMXFF will present at the Australian Rare Earths & Critical Minerals Investor Conference on 19 November 2025.

Red Mountain Mining Limited (ASX:RMX) commenced trading on the OTCQB this week. The share price reached a high of AUD 0.054 (USD 0.035) on its first day. The listing was supported by Red Mountain’s US-based markets advisory team, which engaged with US investors and facilitated initial trading activity.

The company’s capital markets and investor engagement advisors maintain networks in the US capital markets to support ongoing engagement and market presence.

US and Australian Critical Minerals Portfolio

Red Mountain continues discussions with strategic partners to accelerate development of its US and Australian Critical Minerals portfolio. These discussions focus on leveraging partner expertise for project development and navigating US government funding programs.

The US portfolio includes Antimony projects in Idaho and Utah, located near projects with known mineralisation. In Australia, the Armidale Antimony-Gold Project covers nearly 400km² of ground west of Larvotto Resources’ Hillgrove Project, which is Australia’s largest and the world’s eighth-largest Antimony deposit.

Since Larvotto acquired Hillgrove in December 2023, its market cap increased from below AUD 6m to over AUD 700m. Red Mountain expects to release further results from the Armidale Project by the end of November.

Market Engagement and Growth Initiatives

With the US federal government shutdown resolved on 12 November 2025, Red Mountain plans to continue its US growth strategy. Updates on US-based initiatives are expected following completion of due diligence.

The company aims to expand its portfolio in Tier-1 US mining jurisdictions to address supply shortages of strategic and critical metals. The resolution of the government shutdown allows Red Mountain to pursue these initiatives with BLM offices resuming normal operations.

Armidale Antimony-Gold Project Results

The Armidale Project lies adjacent to the Peel Fault and within the New England Orogen geological province. It hosts similar antimony-gold mineralisation to Larvotto Resources’ Hillgrove Project.

Initial exploration targeted historical antimony and gold occurrences along major and minor structures of the Peel Fault system. Key sites include Oaky Creek, East Hills, and Horsley Station prospects. Soil sampling at Oaky Creek returned up to 333ppm Sb, with rock chip values up to 39.3% Sb and 1.09g/t Au. East Hills yielded 9.9% Sb, while Horsley Station returned up to 0.25g/t Au. Additional results are expected by the end of November.

Share Price Snapshot

RMX was trading 11.11% lower at AUD 0.032 per share as of 19 November 2025.