** Hotel booking firm Siteminder SDR.AX soars as much as 31.6% to A$7.170; marks best ever intraday rally
** Stock hits highest since November 15, 2021; top gainer on ASX200 index .AXJO - trading largely flat as of 0115 GMT
** Co posts FY25 underlying net loss of A$17.2 mln ($11.2 mln) vs year-ago loss of A$24.2 mln
** Underlying operating earnings surges sharply to A$14.3 mln from last year's A$855,000
** Co says positioned to deliver strong annual recurring revenue (ARR), revenue growth in FY26
** SDR last up 30%, takes YTD gains to 15%
($1 = A$1.5389)
(Reporting by Sameer Manekar in Bengaluru)
((Sameer.Manekar@thomsonreuters.com;))