| # | Company name | Role | # of Projects |
|---|---|---|---|
| 1 | Approved Lightning Protection Co. | lightning protection | 10 |
| 2 | Bonded Lightning Protection Systems, Inc. | lightning protection | 2 |
| 3 | Dan Delektron A/S | lightning protection | 5 |
| 4 | Ericsson P.A.S.E. | lightning protection | 1 |
| 5 | Guardian Equipment, Inc. | lightning protection | 6 |
| 6 | HLP Systems, Inc. | lightning protection | 16 |
| 7 | Hüppelux GmbH & Co.KG | lightning protection | 0 |
| 8 | J.Pröbster GmbH | lightning protection | 0 |
| 9 | Kraus & Küberich GmbH | lightning protection | 1 |
| 10 | Maxwell Lightning Protection Co. | lightning protection | 38 |
| 11 | R.C. Cutting & Company Ltd. | lightning protection | 6 |
| 12 | Rodell Steeplejacks Limited | lightning protection | 1 |
| 13 | Rudolph Fritz GmbH & Co. KG | lightning protection | 1 |
| 14 | Taylor Lightning Protection | lightning protection | 3 |
| 15 | Thompson Lightning Protection, Inc. | lightning protection | 2 |
| 16 | Windemuller Technical Services | lightning protection | 8 |