** Shares of Australia's Guzman y Gomez GYG.AX rise as much as 22.6% to A$18.63, their biggest intraday pct gain since October 9, 2025
** Stock touches highest level since March 18
** Mexican-style quick service restaurant posts Q3 network sales of A$345.9 million ($238.74 million), up from A$289.5 million, a year ago
** Expects Australia segment underlying EBITDA as % of network sales between 6-6.2% in FY26, compared to 5.7% in FY25
** Despite moves, stock down 17.2% YTD
($1 = 1.4489 Australian dollars)
(Reporting by Aamir Sheik Khalid in Bengaluru)
((Aamir.SheikKhalid@thomsonreuters.com))