| # | Company name | Role | # of projects |
|---|---|---|---|
| 881 | Won-Door Corporation | Fire protection engineering | 3 |
| 882 | Wormald Ansul (UK) Ltd. | Fire protection engineering | 2 |
| 883 | Worsham Sprinkler Co | Fire protection engineering | 0 |
| 884 | Worsham Sprinkler Co | Fire protection engineering | 1 |
| 885 | Worsham Sprinkler Co Inc | Fire protection engineering | 0 |
| 886 | Worsham Sprinkler Company, Inc. | Fire protection engineering | 1 |
| 887 | Xcel Fire Protection Inc. | Fire protection engineering | 1 |
| 888 | Young Brothers Fire Protection Inc | Fire protection engineering | 0 |
| 889 | Ziller-ASS GmbH | Fire protection engineering | 17 |