| # | Company name | Role | # of projects |
|---|---|---|---|
| 1 | S Construction | Construction company | 0 |
| 2 | S y S Ingeniería y Construcción Limitada | Construction company | 1 |
| 3 | S. A. Independência | Construction company | 1 |
| 4 | S. Alon Ltd. | Construction company | 3 |
| 5 | S.A. Jordan Construction Company | Construction company | 0 |
| 6 | S.B. Ballard Construction Company | Construction company | 12 |
| 7 | S.D.Bhalerao Constructions Pvt. Ltd. | Construction company | 1 |
| 8 | S.P. Costruzioni Severin s.n.c. | Construction company | 0 |
| 9 | S.S. Lootah Contracting Co. | Construction company | 11 |
| 10 | S&B James Construction | Construction company | 1 |
| 11 | SABE | Construction company | 1 |
| 12 | SABEL | Construction company | 11 |
| 13 | Sachse Construction & Development Corp. | Construction company | 16 |
| 14 | SACIL | Construction company | 1 |
| 15 | Saconatto | Construction company | 3 |
| 16 | Sacyr Somague UK Ltd. | Construction company | 1 |
| 17 | Sacyr Vallehermoso | Construction company | 7 |
| 18 | Saddlebrook Construction Inc. | Construction company | 22 |
| 19 | SADE Skanska S.A. | Construction company | 0 |
| 20 | Sadia Empresa Constructora | Construction company | 1 |