|
| | Deutsche Asphalt GmbH | Triptis |
| | Drees & Sommer SE | Düsseldorf |
| | PSI Products GmbH | Nehren |
| | GCS Global Clearance Solutions AG | Stockach |
| | Ed. Züblin AG | München |
| | Drees & Sommer SE | Stuttgart |
| | STRABAG Property and Facility Services GmbH | Düsseldorf, Gelsenkirchen |
| | Ed. Züblin AG | Ulm, Neu-Ulm |
| | STRABAG Rail GmbH | Essen |
| | Friedrich Rebmann Erd- Tief- und Straßenbau GmbH & Co. KG | Schönaich |
| | HOCHTIEF Infrastructure GmbH/Building | Frankfurt am Main |
| | Pfeifer Structures GmbH | Buxheim |
| | Heidelberg Materials AG | Stade |
| | Drees & Sommer SE | Stuttgart |
| | H + E Logistik GmbH | Bochum |