| Company name | Reg. code |
|---|---|
| OPTIMUM UÜ | 14598521 |
| APROFIT OPTIMUM UÜ | 12451989 |
| OPTIMUM TEAM OÜ (former name Optimum Team UÜ) | 14001960 |
| OPTIMUM SERVICE OÜ kustutatud (former name Optimum Service UÜ) | 12890401 |
| SUHTEVESKI OÜ (former name Grand optimus UÜ) | 16119163 |
| TOMKRAFT OÜ kustutatud (former name Optimal House UÜ) | 12972139 |
| M.H TRANSPORT OÜ (former name Optimix transport UÜ) | 16171347 |
| MAXTON OÜ (former name Betonax UÜ) | 14198916 |