| # | Name | Location | Applications |
|---|---|---|---|
| 1. | FD Holding Oy | 🇫🇮 Naantali, Finland | 1 |
| 2. | FDH ENGINEERING, INC. | 🇺🇸 Raleigh, NC, United States | 3 |
| 3. | FDH Infrastructure Services, Inc. | 🇺🇸 Raleigh, NC, United States | 1 |
| 4. | FDH Infrastructure Services, LLC | 🇺🇸 Raleigh, NC, United States | 4 |
| 5. | FDH INFRASTUCTURE SERVICES, LLC | 🇺🇸 Raleigh, NC, United States | 1 |