| # | Company name | Role | # of projects |
|---|---|---|---|
| 1 | Cerviglas S.L. | Window installation | 9 |
| 2 | Chr. Omstrup & Poul Juul | Window installation | 1 |
| 3 | Confianza Window Tinting, Inc. | Window installation | 1 |
| 4 | Cristalmin | Window installation | 2 |
| 5 | Crystal Window & Door Systems, Ltd. | Window installation | 4 |
| 6 | Custom Glass & Glazing | Window installation | 0 |