Caterpillar is the world’s largest manufacturer of construction equipment, headquartered in Peoria, Illinois. At the Dortmund site, Caterpillar Mining HMS GmbH develops and manufactures large hydraulic excavators for the mining industry.

Caterpillar Global Mining Europe GmbH, based in Lünen, Germany, develops and manufactures underfloor dredging systems such as planers and signs as well as components like gearboxes, cylinders and stamps.