| # | Company name | Role | # of projects |
|---|---|---|---|
| 1 | B & B Fire Protection | Fire protection engineering | 1 |
| 2 | B & G Fire Protection | Fire protection engineering | 1 |
| 3 | Bahl Fireproofing, Inc. | Fire protection engineering | 1 |
| 4 | Basic Fire Protection | Fire protection engineering | 2 |
| 5 | Batterjee Security Products & Fire Systems | Fire protection engineering | 0 |
| 6 | Bay Fire Protection Inc. | Fire protection engineering | 0 |
| 7 | Bayou Fire Protection | Fire protection engineering | 0 |
| 8 | bbf - Bauberatung Brandschutz Fakesch | Fire protection engineering | 10 |
| 9 | BBS-Kerstin Görhs GmbH | Fire protection engineering | 3 |
| 10 | Beach Lake Sprinkler | Fire protection engineering | 0 |
| 11 | BELFOR International GmbH | Fire protection engineering | 0 |
| 12 | Bender & Modlin | Fire protection engineering | 1 |
| 13 | Beydoun Fire Systems | Fire protection engineering | 10 |
| 14 | BFPE International | Fire protection engineering | 0 |
| 15 | Bi-State Fire Protection Corporation | Fire protection engineering | 18 |
| 16 | Big Tex Fire Protection | Fire protection engineering | 0 |
| 17 | Blackhawk Automatic Sprinklers Inc | Fire protection engineering | 0 |
| 18 | Bluegrass Sprinkler | Fire protection engineering | 0 |
| 19 | Bolt Fire Protection | Fire protection engineering | 0 |
| 20 | Bowman Drussa | Fire protection engineering | 0 |