| Company name | Reg. code |
|---|---|
| MONOTOON OÜ (former name BENDED OÜ) | 12838760 |
| MONOLOOG OÜ | 12157043 |
| MONOWOOD OÜ | 14521062 |
| MONETRON OÜ (former name Moneenu OÜ) | 12835603 |
| MONOMONO OÜ | 14079593 |
| MONODON OÜ kustutatud | 10465102 |
| MONOGON OÜ | 12319244 |
| MOTOTRON OÜ | 16848519 |
| RONOTON OÜ | 10647872 |
| COMPANY SOLVER OÜ (former name Pontoon OÜ) | 14925303 |