| # | Company name | Role | # of Projects |
|---|---|---|---|
| 1 | ABB Current Oy | site agent | 1 |
| 2 | ABG GmbH & Co KG | site agent | 3 |
| 3 | Alexander Maul | site agent | 1 |
| 4 | Alt & Poppel Büro für Baubetreuung GmbH | site agent | 1 |
| 5 | Bauing. Josef Rüping | site agent | 1 |
| 6 | Bauplanungs und Steuerungs GmbH | site agent | 1 |
| 7 | Bau-Real Gesellschaft für Ausführungsplanung mbH & Co. KG | site agent | 2 |
| 8 | Beijing Shuangyuan Engineering Construction & supervision Ltd Co. | site agent | 1 |
| 9 | Blake, Cassels & Graydon LLP | site agent | 0 |
| 10 | Blue Dot Corporation | site agent | 2 |
| 11 | BPN Bauplan Nord GmbH & Co Hamburg KG | site agent | 1 |
| 12 | CRSS Constructors, Inc. | site agent | 2 |
| 13 | Deutsche Post Bauen GmbH | site agent | 1 |
| 14 | Diete und Siepmann | site agent | 2 |
| 15 | DIL Deutsche Baumanagement GmbH | site agent | 2 |
| 16 | Dipl.-Ing. Rolf Vollmer | site agent | 1 |
| 17 | D & K Architekten | site agent | 0 |
| 18 | EDiS Company | site agent | 2 |
| 19 | Fini Produktions Architekten | site agent | 1 |
| 20 | Gafcon, Inc. | site agent | 6 |