** Shares of Australia's DroneShield DRO.AX slip as much as 19.8% to A$3.2, marking their biggest intra-day pct gain since March 27
** Co says CEO Oleg Vornik will step down, while Chairman Peter James will also retire
** DRO appoints Angus Bean as Managing Director and CEO, and Hamish McLennan as Independent Chairman-elect
** Stock currently down 11% at A$3.55, their lowest level since February 25
** DRO is the biggest percentage loser in the benchmark S&P ASX/200 index .AXJO
** Stock up 17.53% this year, including the day's move
(Reporting by Roushni Nair in Bengaluru)
((Roushni.nair@thomsonreuters.com))