** Shares of DroneShield DRO.AX fall as much as 16.2% to A$2.960, hitting their lowest level since February 24
** The defence tech company receives a notice from Australia's corporate regulator, requiring assistance in an investigation
** Regulator is investigating announcements and information provided by DroneShield to the Australian Securities Exchange between November 1 and November 20, 2025, as well as trading in the company's shares between November 6 and November 12
** Company says it was not clear what action, if any, may result from the probe
(Reporting by Rajasik Mukherjee in Bengaluru)
((Rajasik.Mukherjee@thomsonreuters.com))