|
 | | Ed. Züblin AG | Regensburg |
 | | Drees & Sommer SE | Stuttgart |
 | | Drees & Sommer SE | Stuttgart |
 | | Eiffage Infra-Rail GmbH | Berlin |
 | | Drees & Sommer SE | Stuttgart |
 | | Drees & Sommer SE | Stuttgart |
 | | Zeppelin Systems GmbH | Friedrichshafen |
 | | Drees & Sommer SE | Frankfurt am Main |
 | | weisenburger bau GmbH | Düsseldorf, Frankfurt am Main, Freiburg, Heilbronn, Karlsruhe, Rottweil, Stuttgart, Ulm |
 | | STRABAG AG | Stuttgart |
 | | Ed. Züblin AG | Hamburg |
 | | STRABAG AG | Magdeburg, Halberstadt |
 | | Paul Bauder GmbH & Co. KG | Stuttgart |
 | | ADING NRW GmbH | Wuppertal |
 | | VINCI Construction Shared Services GmbH | Bottrop |