Announcement PDF ASX: RMX investorhub.redmountainmining.com.au info@redmountainmining.com.au Red Mountain Mining Ltd ACN 119 568 106 RED MOUNTAIN MINING SUCCESSFULLY LISTS ON THE US STOCK MARKET WITH A STRONG TRADING DEBUT UP 36% HIGHLIGHTS • RMXFF successfully listed on the US Market (OTCQB) with Red Mountain trading as high as A$0.054 (US$0.035) on the first day, up 36% • RMXFF experienced a strong debut, with robust market activity & trading volumes and high levels of US-based investor engagement • RMXFF is set to present at the Australian Rare Earths & Critical Minerals Investor Conference on 19 November 2025, to be distributed across the broader US capital markets network • Red Mountain is continuing to be actively engaged in discussions with experienced strategic partners to fast-track its US and Australian Critical Minerals Portfolio • These discussions are focused on accelerating project development and leveraging partner expertise in navigating US Government funding programs and Critical Minerals project development and support • Red Mountain’s United States Critical Minerals Portfolio uniquely includes highly prospective and advantageously located Antimony Projects in both Idaho and Utah - adjacent to projects with significant known Antimony mineralisation • In Australia, Red Mountain’s highly prospective Armidale Antimony-Gold Project comprises a large, strategic tenure covering nearly 400km2 of highly prospective ground, located west of Larvotto Resources’ (ASX: LRV $580m market cap) Hillgrove Project, which is Australia’s largest and the world’s eighth largest Antimony deposit – also subject to the recent takeover attempt from United States Antimony Corp (NYSE: UAMY A$1.5b market cap) • Since the acquisition of Hillgrove in December 2023, LRV’s market cap has surged from less than $6 million to a high of over $700 million • Red Mountain expects to receive and announce the further results from its Armidale Antimony-Gold Project by the end of November • Red Mountain also expects to make further updates to the market regarding its US based growth initiatives with the Bureau of Land and Management (BLM) offices returning to normal operational capacity, following the resolution of the US Government shutdown this month ASX Announcement 19 November 2025 RED MOUNTAIN MINING LTD ASX: RMX INVESTORHUB.REDMOUNTAINMINING.COM.AU 2 Red Mountain Mining Limited (ASX: RMX, US CODE: RMXFF, or “Company”), a Critical Minerals exploration and development company with a growing portfolio in Tier-1 Mining Districts in the United States and Australia, is pleased to announce that RMXFF successfully commenced trading on the OTCQB this week. The price reached a high of A$0.054 (US$0.035) on the first day of activity. Red Mountain’s highly experienced US-based markets advisory team has successfully supported the RMXFF listing and the Company notes the strong initial US based investor interest and trading volumes, relative to its peers. Red Mountain’s specialised capital markets and investor engagement advisors, have deep networks within the US capital markets, and the Company is working closely with its advisors to further enhance and complement the benefits of the RMXFF listing. Red Mountain Mining set to continue aggressive growth strategy Red Mountain continues to seek further opportunities to expand its portfolio of high-quality Strategic Metals projects in Tier-1 US mining jurisdictions, with a goal of building a portfolio of assets to leverage what is an unprecedented critical shortage of Western supply of Strategic and Critical Metals. Figure 1: President Donald Trump signs the bill package to re-open the federal government in Washington, DC Source: https://www.opb.org/article/2025/11/13/house-votes-to-end-longest-ever-shutdown/ RED MOUNTAIN MINING LTD ASX: RMX INVESTORHUB.REDMOUNTAINMINING.COM.AU 3 The resolution of the US federal government shutdown on 12 November 2025, allows for Red Mountain to continue its aggressive US growth and expansion strategy. Subject to the satisfactory completion of due diligence, the Company expects to announce further growth initiatives this month. Strong Antimony results highlight the potential of Red Mountain’s Armidale Project RMX’s Armidale Project encompasses almost 400km2 adjacent to the highly prospective Peel Fault and lies within the same geological province and hosts a similar style of orogenic antimony-gold mineralisation to Larvotto Resources’ (ASX: LRV) Hillgrove Project (Figure 1), which is Australia’s largest and the globe’s eighth largest known antimony deposit. Figure 2: Known NSW gold and antimony mineral occurrences relative to basement orogenic units. The map clearly demonstrates the prospectivity of the New England Orogen for antimony and gold. The location of LRV’s Hillgrove Deposit, the Peel Fault and Red Mountain’s Armidale Antimony-Gold Project are also shown. RED MOUNTAIN MINING LTD ASX: RMX INVESTORHUB.REDMOUNTAINMINING.COM.AU 4 Red Mountain’s initial strategy for the Company’s Armidale Antimony-Gold Project has been to investigate previously identified historical antimony and gold mineral occurrences that are associated with major and minor structures associated with the Peel Fault system. Since acquiring the project, Red Mountain has rapidly explored key antimony prospects in the northern portion of the tenement and at the East Hills antimony prospect and Horsley Station gold prospect in the south. As has been previously reported, Oaky Creek in the north, returned antimony in soils results of up to 333ppm Sb1 and rock chip values of up to 39.3% Sb3 and 1.09g/t Au2 . Initial rock chip samples from East Hills gave a best result of 9.9% Sb3 , and rock chip samples from the Horsley Station gold prospect returned up to 0.25g/t Au4 . Red Mountain expects to receive and announce the further set of results from its Armidale Antimony- Gold Project by the end of November. Authorised for and on behalf of the Board, Mauro Piccini Company Secretary About Red Mountain Mining Red Mountain Mining Ltd (ASX: RMX, US CODE: RMXFF) is a Critical Minerals and Gold exploration and development company focussed on accelerating its United States and Australia based assets, located in Tier-1 Mining Districts. Red Mountain is fast-tracking its Critical Minerals projects in the US and Australia, and the Board and Management is determined to rapidly define a portfolio of advanced projects to assist the United States and Western countries with a reliable, high-quality source of commodity supply, including from the Company’s: Armidale Antimony-Gold Project located in NSW, Australia, which has delivered High-Grade Antimony samples to date (up to 39.3% Sb) and US Critical Minerals Portfolio: Utah Antimony Project in the Antimony Mining District of Utah, adjacent to Trigg Minerals’ Antimony Canyon Project (ASX: TMG), Yellow Pine Antimony Project, with historic workings, less than 2km from Perpetua’s Stibnite Project (NASDAQ: PPTA) in Idaho, Silver Dollar Antimony Project (Historic Antimony Mine), south of Yellow Pine, reporting up to 17.7% Sb and US Lithium Projects in Nevada. 1 RMX ASX Announcement 7 June 2025. https://investorhub.redmountainmining.com.au/announcements/6998482 2 RMX ASX Announcement 2 October 2025. https://investorhub.redmountainmining.com.au/announcements/7181513 3 RMX ASX Announcement 15 October 2025. https://investorhub.redmountainmining.com.au/announcements/7209330 RED MOUNTAIN MINING LTD ASX: RMX INVESTORHUB.REDMOUNTAINMINING.COM.AU 5 Competent Person Statement The information in this announcement that relates to Exploration Results and other technical information complies with the 2012 Edition of the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (JORC Code). It has been compiled and assessed under the supervision of contract geologist Mark Mitchell. Mr Mitchell is a Member of the Australasian Institute of Geoscientists and has sufficient experience that is relevant to the style of mineralisation and type of deposit under consideration and to the activity being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the JORC Code. Mr Mitchell consents to the inclusion in this announcement of the matters based on his information in the form and context in which it appears. Disclaimer In relying on the above mentioned ASX announcement and pursuant to ASX Listing Rule 5.23.2, the Company confirms that it is not aware of any new information or data that materially affects the information included in the above-mentioned announcement. JOIN THE RED MOUNTAIN MINING INVESTOR HUB FOR RMX AND RMXFF Visit https://investorhub.redmountainmining.com.au for access to the Investor Hub