** Shares of Altair Minerals ALR.AX rise as much as 31.7% to A$0.054, their highest level since February 25, 2021
** Stock posts its largest intraday pct jump since early August 2025
** The diversified miner receives firm commitments to raise A$28.2 million ($20.19 million) via a placement
** The placement issue price at A$0.043, a 4.9% premium to stock's last close
** Says funds will be used to accelerate co's drilling programs among others
** More than 57.7 million shares change hands, 3.7 times the 30-day average
** Stock up 92% YTD, including the day's moves
($1 = 1.3970 Australian dollars)
(Reporting by Nikita Maria Jino in Bengaluru)
((Nikita.Jino@thomsonreuters.com;))