?- Bechtel Corporation
- VINCI Airports
- Skanska
- Bouygues Construction
- Eiffage S.A.
- STRABAG International GmbH
- Balfour Beatty plc
- Impresa Pizzarotti & C. S.p.A.
- BAM International
- Limak Construction
- TAV Construction
- BIC Contracting LLC
- ALEC Engineering and Contracting