Announcement PDF Market Announcement 9 September 2025 Red Mountain Mining Limited (ASX: RMX) – Trading Halt Trading in the securities of Red Mountain Mining Limited (‘RMX’) will be halted at the request of RMX, pending the release of an announcement by RMX. Unless ASX decides otherwise, the securities will remain in trading halt until the earlier of: • the commencement of normal trading on Thursday, 11 September 2025; or • the release of the announcement to the market. RMX’s request for a trading halt is attached below for the information of the market. Issued by ASX Compliance 9 September 2025 ASX Limited Market Announcement 1/1 ASX Customer Service Centre 131 279 | asx.com.au ASX Announcement 9 September 2025 Mr. Ben Dawson Australian Securities Exchange Level 40, Central Park 152-158 St George's Terrace Perth WA 6000 By email: tradinghaltsperth@asx.com.au TRADING HALT: RED MOUNTAIN MINING LIMITED Dear Mr Dawson, Red Mountain Mining Limited (the “Company”) (ASX: RMX) requests the immediate implementation of a trading halt with respect to its securities to apply from the commencement of trading on Tuesday 9 September 2025. In accordance with ASX Listing Rule 17.1, the Company advises the following: 1. The trading halt is requested for the purposes of a material acquisition in its US Critical Minerals portfolio (the “Announcement”); 2. The Company requests that the trading halt last until the commencement of trading on Thursday 11 September 2025 or earlier Announcement by the Company; and 3. The Company is not aware of any reason why the trading halt should not be granted nor any other information necessary to inform the market about the trading halt. Authorised by the Board, Mauro Piccini Company Secretary JOIN THE RED MOUNTAIN MINING INVESTOR HUB Visit https://investorhub.redmountainmining.com.au for access to the Investor Hub ASX: RMX investorhub.redmountainmining.com.au info@redmountainmining.com.au Red Mountain Mining Ltd ACN 119 568 106