| # | Company name | Role | # of projects |
|---|---|---|---|
| 1 | J & E Duff, Inc. | Construction company | 1 |
| 2 | J & P Hellas SA | Construction company | 5 |
| 3 | J A Ball Limited | Construction company | 1 |
| 4 | J Simões Engenharia | Construction company | 10 |
| 5 | J. A. La Rocca Brothers | Construction company | 1 |
| 6 | J. C. Phelan Company | Construction company | 0 |
| 7 | J. Cris Construction Company | Construction company | 1 |
| 8 | J. Debinck | Construction company | 1 |
| 9 | J. King & Son | Construction company | 1 |
| 10 | J. Nasser Engenharia | Construction company | 8 |
| 11 | J. Nunes Construções Ltda | Construction company | 1 |
| 12 | J. P. Haynes Construction | Construction company | 1 |
| 13 | J. Rich Steers, Inc. | Construction company | 2 |
| 14 | J. Smart & Co. (Contractors) PLC | Construction company | 0 |
| 15 | J. Van der Sluys (Pty) Ltd. | Construction company | 2 |
| 16 | J.A. Hammett | Construction company | 1 |
| 17 | J.A. Jones Construction | Construction company | 1 |
| 18 | J.A. Tiberti Construction | Construction company | 6 |
| 19 | J.A. Wachter Builders | Construction company | 1 |
| 20 | J.A.G. Empreendimentos Ltda. | Construction company | 0 |