| # | Company name | Role | # of projects |
|---|---|---|---|
| 1 | H Guedes Engenharia LTDA | Construction company | 3 |
| 2 | H N Edwards & Partners Limited | Construction company | 0 |
| 3 | H. Janisch & Co. | Construction company | 7 |
| 4 | H. Meitar Construction | Construction company | 2 |
| 5 | H. Meyer Bau-GmbH | Construction company | 1 |
| 6 | H. S. Bragg | Construction company | 1 |
| 7 | H. W. Schlueter | Construction company | 1 |
| 8 | H.B. Ryan Company | Construction company | 1 |
| 9 | H.C. Hagemann GmbH | Construction company | 13 |
| 10 | H.H. Reed Company | Construction company | 0 |
| 11 | H.J. High Construction Co. | Construction company | 14 |
| 12 | H.P. Sørensen I/S | Construction company | 1 |
| 13 | H.S Caiuby Construtora | Construction company | 1 |
| 14 | H&J Martin | Construction company | 1 |
| 15 | h+w Ziviltechniker GmbH | Construction company | 1 |
| 16 | H2K Construction, LLC | Construction company | 0 |
| 17 | Haacke Construtora | Construction company | 3 |
| 18 | HABAU Hoch- und Tiefbaugesellschaft m.b.H. | Construction company | 5 |
| 19 | Habiarte Barc | Construction company | 25 |
| 20 | Habicol | Construction company | 3 |