| # | Company name | Role | # of projects |
|---|---|---|---|
| 121 | Aztec Fire and Safety | Fire protection engineering | 0 |
| 122 | B & B Fire Protection | Fire protection engineering | 1 |
| 123 | B & G Fire Protection | Fire protection engineering | 1 |
| 124 | Bahl Fireproofing, Inc. | Fire protection engineering | 1 |
| 125 | Basic Fire Protection | Fire protection engineering | 2 |
| 126 | Batterjee Security Products & Fire Systems | Fire protection engineering | 0 |
| 127 | Bay Fire Protection Inc. | Fire protection engineering | 0 |
| 128 | Bayou Fire Protection | Fire protection engineering | 0 |
| 129 | bbf - Bauberatung Brandschutz Fakesch | Fire protection engineering | 10 |
| 130 | BBS-Kerstin Görhs GmbH | Fire protection engineering | 3 |
| 131 | Beach Lake Sprinkler | Fire protection engineering | 0 |
| 132 | BELFOR International GmbH | Fire protection engineering | 0 |
| 133 | Bender & Modlin | Fire protection engineering | 1 |
| 134 | Beydoun Fire Systems | Fire protection engineering | 10 |
| 135 | BFPE International | Fire protection engineering | 0 |
| 136 | Bi-State Fire Protection Corporation | Fire protection engineering | 18 |
| 137 | Big Tex Fire Protection | Fire protection engineering | 0 |
| 138 | Blackhawk Automatic Sprinklers Inc | Fire protection engineering | 0 |
| 139 | Bluegrass Sprinkler | Fire protection engineering | 0 |
| 140 | Bolt Fire Protection | Fire protection engineering | 0 |