| # | Company name | Role | # of projects |
|---|---|---|---|
| 401 | Bureau Veritas Germany Holding GmbH | Consultancy | 0 |
| 402 | Burgess & Niple Ltd. | Consultancy | 0 |
| 403 | Burnham Nationwide | Consultancy | 0 |
| 404 | Burns Cooley Dennis, Inc. | Consultancy | 1 |
| 405 | Büro Grünzig; Planungs- und Ingenieurgesellschaft mbH | Consultancy | 6 |
| 406 | Buro Happold | Consultancy | 6 |
| 407 | Buro Wieringa BV | Consultancy | 2 |
| 408 | Burtenshaws | Consultancy | 0 |
| 409 | Burtenshaws | Consultancy | 0 |
| 410 | Burtenshaws | Consultancy | 0 |
| 411 | Burtenshaws | Consultancy | 0 |
| 412 | Burtenshaws | Consultancy | 0 |
| 413 | Burtenshaws | Consultancy | 0 |
| 414 | Burton Blueprinting | Consultancy | 0 |
| 415 | Busby & Associates, Inc | Consultancy | 0 |
| 416 | Busby Denny International | Consultancy | 0 |
| 417 | BWB Consulting Ltd. | Consultancy | 1 |
| 418 | C & N Environmental Consulting Group | Consultancy | 0 |
| 419 | C & R Reprographics | Consultancy | 1 |
| 420 | C H Johnson Consulting | Consultancy | 1 |