** Shares of Australia's Red Mountain Mining RMX.AX soar as much as 24% to A$0.031, their highest level since November 17, 2025
** Marks steepest intraday rise since January 23
** Critical minerals and gold explorer acquires Thompson Falls Antimony Project, adjacent to United States Antimony Corporation’s UAMY.A operations which are crucial to the US critical minerals supply chain
** Initial batch of assay results shows grades of up to 36.5% antimony and 0.65g/t gold at the project
** Stock is up 16% YTD, including the session's moves
(Reporting by Anjali Singh in Bengaluru)
((anjali.singh2@thomsonreuters.com;))