** Shares of Rubicon Water RWL.AX rise 4% to A$0.26, on track for strongest session since March 28

** The irrigation automation software and hardware maker says it does not expect U.S. tariffs to have any material impact on its FY25 financial result

** Stock sees busiest session since March 19, with 76,923 shares being traded

** Stock down 10.3% YTD, including moves in current session

(Reporting by Jasmeen Ara Shaikh in Bengaluru)

((JasmeenAraIslam.Shaikh@thomsonreuters.com;))