| Company name | Reg. code |
|---|---|
| TRIOPOLAR OÜ kustutatud | 12242470 |
| TRIOPOWER OÜ (former name Triopower UÜ) | 16301519 |
| TRIONOVAR OÜ (former name Trionovar UÜ) | 16157471 |
| TRIPPOLA OÜ kustutatud | 14928059 |
| TRIKOLAR OÜ | 11149076 |
| TRIOPLAN OÜ | 12060303 |
| BT PROPOLAR OÜ kustutatud | 16397784 |