** Shares of Australia's Radiopharm Theranostics RAD.AX fall as much as 24.3% to A$0.028, their lowest since September 30
** Clinical-stage radiotherapeutics firm says it received firm commitments for a A$35 million ($22.77 million) fundraise via institutional placement at an issue price of A$0.03 per share
** Placement price represents 18.9% discount to co's last close
** RAD also launches A$5 million share purchase plan open to investors at A$0.03 per share
** Proceeds will be used to fund drug manufacturing and clinical trials, co says
** In a separate announcement, co provides positive clinical updates across four programs
** Around 21.2 mln shares change hands, nearly 4.2x 30-day average
** RAD up 16.7% YTD
($1 = 1.5370 Australian dollars)
(Reporting by Keshav Singh Chundawat in Bengaluru)
((Keshav.singhchundawat@thomsonreuters.com))