: ▁K ist ler ▁Hold ing ▁AG ), ▁with ▁headquarters ▁in ▁Winter thur , ▁is ▁an ▁intern ation ally ▁active ▁Swiss ▁group ▁of ▁companies ▁special izing ▁in ▁the ▁field ▁of ▁measurement ▁technology . ▁With ▁more ▁than ▁ 3 0 ▁Group ▁Comp an ies , ▁the ▁K ist ler ▁Group ▁is ▁represented ▁at ▁ 6 1 ▁locations ▁in ▁over ▁ 3 0 ▁countries ▁and , ▁although ▁owner - managed , ▁is ▁organized ▁as ▁a ▁listed ▁company . ▁ ▁The ▁K ist ler ▁Group ▁emp lo ys ▁some ▁ 2 2 0 0 ▁members ▁of ▁staff ▁and ▁generated ▁re venue ▁of ▁ 4 6 6 ▁million ▁Swiss ▁fran cs ▁in ▁ 2 0 1 9 . ▁ ▁Appro xim ately ▁ 1 0 % ▁of ▁re venue ▁flows ▁back ▁into ▁research ▁and ▁technology ▁every ▁year . ▁ ▁History ▁The ▁company ▁was ▁founded ▁by ▁Walter ▁P . ▁K ist ler ▁and ▁Hans ▁Con rad ▁Son der eg ger ▁in ▁ 1 9 5 9 ▁as ▁the ▁K ist ler ▁Inst rument ▁Corporation , ▁but ▁the ▁enter prise ▁started ▁in ▁ 1 9 5 0 ▁when ▁K ist ler ▁pat ented ▁a ▁charge ▁ampl ifier ▁he ▁developed . ▁Hans ▁Con rad ▁Son der eg ger ▁is ▁the ▁father ▁of ▁the ▁current ▁( 2 0 1 0 ) ▁CE O . ▁In ▁ 1 9 5 9 ▁the ▁company ▁became ▁active ▁on ▁the ▁stock ▁market . ▁Since ▁ 1 9 6 1 ▁the ▁company ▁started ▁the ▁in - house ▁production ▁of ▁charge ▁ampl ifiers ▁and ▁the ▁development ▁of