No, they're swiss:
"The Liebherr Group's holding company is Liebherr-International AG in Bulle, Switzerland, which is entirely owned by members of the Liebherr family."
However "The Liebherr Group is a German manufacturing complex established in 1949 by Hans Liebherr, headquartered in Biberach an der Riss, Baden-Württemberg." so that may be why you thought so.