** Shares in Italy's Industrie De Nora DNR.MI rise 18.1% as of 1535 GMT, after company posts 15.9% y/y increase in Q3 adjusted EBITDA and upgrades FY margin forecast
** DNR now sees adjusted EBITDA margin to be around 19% for 2025, up from the previously estimated range of 17% to 18%
** A Milan-based trader points to "very positive results" and guidance upgrade
** Stock up as much as 19.1% at 8.57 EUR/shr, its highest level since March 19, when it plunged in its biggest one-day drop since IPO
** Including day's rise, the stock has gained more than 10% YTD
(Enrico Sciacovelli)