| Ettevõtte nimi | Reg. kood |
|---|---|
| OPTIMISTIC OÜ | 12880911 |
| OPTIMISTIC TECH OÜ | 17408296 |
| OPTIMISTIC SYSTEMS OÜ | 17383241 |
| OPTIMISTLIK OÜ | 12706745 |
| OPTIMISTA OÜ | 12246829 |
| OPTISTIC OÜ | 17314843 |
| OPTIMATIC EHITUS OÜ (endine nimi Baradeus Grupp OÜ) | 14033664 |
| OPTIMIST GROUP OÜ | 14335164 |
| OPTIMIST PUBLIC OÜ | 12883097 |
| OPTIMIST DIGITAL OÜ (endine nimi Optimist Digital Ventures OÜ) | 14690787 |
| NOMAD OPTIMIST OÜ kustutatud | 14571218 |
| OPTIMIST CREATIVE OÜ (endine nimi OPTIMIST GROUP OÜ) | 11683485 |
| OPTIMIST LIVE OÜ | 14721648 |
| OPTIMIST EHA OÜ | 17103690 |
| OPTIMIST MOTION OÜ | 14086755 |
| TACTICAL OPTIMIST OÜ | 16151054 |
| OUTL1NE OÜ (endine nimi Optimist Digital OÜ) | 12241097 |