| Company name | Reg. code |
|---|---|
| STUDIO ONE OÜ | 11063788 |
| ONE PIXEL STUDIO OÜ | 14628765 |
| STUDIO ONE JÕHVI OÜ (former name Levandi Foto OÜ) | 14933936 |
| CHAPTER ONE STUDIO OÜ | 16833512 |
| QUICKFIRE OÜ kustutatud (former name Game Studio ONE OÜ) | 12995100 |
| ONG STUDIO OÜ | 14252461 |
| ONR STUDIO OÜ kustutatud | 16716388 |
| ENE VIKSI STUUDIO OÜ | 11490792 |