| # | Company name | Role | # of projects |
|---|---|---|---|
| 1 | T. J. Wies Contracting, Inc. | Construction company | 4 |
| 2 | T.C. Bateson Construction Co. | Construction company | 1 |
| 3 | Tada Corporation | Construction company | 10 |
| 4 | Tael Incorporações e Construções | Construction company | 21 |
| 5 | Tagara Group | Construction company | 6 |
| 6 | Tagy Ltd. - N. Shaked Group | Construction company | 6 |
| 7 | Tähtinen & Sola | Construction company | 1 |
| 8 | Tai Yieh Construction & Engineering Company Limited | Construction company | 1 |
| 9 | Taihei Construction | Construction company | 3 |
| 10 | Taisei Construction Company | Construction company | 1 |
| 11 | Taisei Corporation | Construction company | 736 |
| 12 | Taisei U-LEC Corporation | Construction company | 1 |
| 13 | Taiyo Construction Co.,Ltd. | Construction company | 1 |
| 14 | Takamatsu Construction Cop. | Construction company | 10 |
| 15 | Takara Space Design Corporation | Construction company | 1 |
| 16 | TAKCO Tan Ky Construction Real Estate Trading Corporation | Construction company | 1 |
| 17 | TAKEMATSU construction Co., Ltd | Construction company | 1 |
| 18 | Takenaka Corporation | Construction company | 476 |
| 19 | Takenaka Corporation Tokyo | Construction company | 381 |
| 20 | Takenaka Europe GmbH | Construction company | 0 |