** Shares of Australia's American Tungsten & Antimony AT4.AX fall as much as 10% to A$0.072, its lowest level since June 13, 2025
** Stock hits biggest intraday pct drop since March 23
** Mineral explorer says it would raise A$10 million ($7.15 million) through placement
** An offer price of A$0.07/share marks a 12.5% discount, as of the firm's last close on May 15, before it went on a trading halt for this announcement
** Says funds from placement to be used to advance the company's portfolio of tungsten and
antimony assets in Utah and Nevada, among others
** YTD, stock down 33.6%
($1 = 1.3986 Australian dollars)
(Reporting by Aamir Sheik Khalid in Bengaluru)
((Aamir.SheikKhalid@thomsonreuters.com))