** Shares of Sartorius AG SATG.DE fall 3.1% premarket after the German laboratory equipment maker posted Q1 results
** Its EBITDA margin edged down to 29.7% from 29.8%
** A local trader says Q1 results were a touch below expectations, adding that the margin was a slight disappointment
** "Given the good performance lately, Sartorius shares could be hurt this morning," the trader adds
** Sartorius is the bottom mover in premarket indications of the German mid-cap index .MDAXI
(Reporting by Simon Ferdinand Eibach)
((Simonferdinand.eibach@thomsonreuters.com))