** Shares of Australia's Atomo Diagnostics AT1.AX fall as much as 17.5% to A$0.033, posting their biggest intraday pct drop since April 15, 2025
** Medical device firm will raise up to A$4.0 million ($2.74 million) via placement and share purchase plan at an issue price of A$0.033 per share
** Issue price represents a 17.5% discount to stock's last closing price
** Proceeds will be used to expand commercialisation of co's portfolio of proprietary diagnostic tests, including Active Syphilis and Liver function, among others
** About 4.6 mln shares change hands, nearly 3.5x 30-day average
** AT1 down 5.6% YTD
($1 = 1.4611 Australian dollars)
(Reporting by Keshav Singh Chundawat in Bengaluru)
((Keshav.singhchundawat@thomsonreuters.com))