| Company name | Reg. code |
|---|---|
| TEAM-O MTÜ | 80618122 |
| TEAM OLD DOGS MTÜ | 80625292 |
| TEAM OIDERMA MTÜ | 80630815 |
| OAK RACING TEAM MTÜ | 80670803 |
| RACING TEAM ONE MTÜ | 80365566 |
| OFFSHORE TEAM ESTONIA MTÜ | 80660029 |
| ESTONIAN PCC AND OPEN TEAM MTÜ | 80606053 |
| RALLIKLUBI ORU RALLY TEAM MTÜ | 80049345 |