** Shares of Downer EDI DOW.AX rise as much as 4.9% to A$8.105, their highest level since Feb 3

** Shares post biggest intraday pct gain since Sept 11, 2025

** Infrastructure co posts a 29.8% increase in statutory NPAT to A$98 million ($69.07 million) for the half year

** YTD, DOW shares up 0.5%

($1 = 1.4188 Australian dollars)

(Reporting by Nichiket Sunil in Bengaluru)

((Nichiket.Sunil@thomsonreuters.com))