** Shares in Siltronic WAFGn.DE fall as much as 8.6% after the German semiconductor materials supplier missed Q1 sales and core profit expectations, with its CEO citing capacity constraints at customers in the memory chip sector
** Q1 revenue was 306.5 million euros ($358.61 million), down from 345.8 million euros a year earlier and missing analysts' average estimate of 317 million in an LSEG poll
** The company's quarterly EBITDA came in at 65.1 million euros, down from 86.4 million euros last year, and below analysts' forecast of 67.4 million euros
** "Not a disaster with guidance confirmed, but definitely not a relief print either. Underlying earnings and cash flow trends stay weak," a local trader says
** Siltronic confirmed its FY guidance for 2026
** The stock, which has gained 37.5% YTD including today's session, is among the worst performers of Germany's small-cap index .SDAXI
($1 = 0.8547 euros)
(Reporting by Ozan Ergenay)
((ozan.ergenay@thomsonreuters.com))