| Company name | Reg. code |
|---|---|
| SERNAVO OÜ | 17468084 |
| SERRANO OÜ kustutatud | 12122062 |
| SERAVCO OÜ | 17334633 |
| SERNAT OÜ | 12533724 |
| SERNAS OÜ | 14862343 |
| SERANALVO RAVELNAVES OÜ kustutatud (former name OÜ Klubihaldus) | 11712063 |
| SERNA OÜ | 16179142 |
| SERVO GRUPP OÜ | 10487032 |
| BUSINESS IMPORT AND EXPORT OÜ (former name Sernexo OÜ) | 16478962 |
| SARNADO OÜ | 14840620 |
| PERNAVA OÜ | 14806209 |
| SENAGO OÜ | 12650654 |
| GENAVO OÜ kustutatud (former name Genavo UÜ) | 14458731 |
| FERNAO OÜ | 14225145 |
| STRAVO GRUPP OÜ | 16176729 |