Check the vendors user stories: https://www.wolfram.com/system-modeler/customer-stories/ Check the Modelica conferences (https://modelica.org/events/modelica2019/proceedings/html/Mo...) and you'll see a lot of automotive companies (Toyota, Volvo, Bosch, etc)

energy companies (powerplants, building systems etc.), aerospace, automotive, motorsports, robotics

Some more industry case sturdies here: https://www.modelon.com/industries/