| Company name | Reg. code |
|---|---|
| SIRENS OÜ kustutatud | 12371411 |
| SIRENA OÜ | 14211597 |
| SIREN OÜ | 12497862 |
| SIRENI PLIKA OÜ kustutatud | 14428782 |
| SIRENA INVEST OÜ | 11885800 |
| SIRENA & KO OÜ | 12830735 |
| SIREN SOLUTIONS OÜ | 16853650 |
| SIREN SAILING OÜ | 16402924 |
| SIREN COVERS OÜ | 16403013 |
| SIREN SALONG OÜ | 16905826 |
| NORDIC SIREN OÜ kustutatud | 14683385 |
| SIREN GROUP OÜ | 10814637 |
| SIREN DIGITAL INVESTMENT OÜ kustutatud | 14627872 |
| VIRENS OÜ kustutatud | 10023456 |
| KOURAMOKE SALUBILI OÜ (former name PortMedica OÜ) | 16510861 |
| SIRIS OÜ (former name Siris Kindlustusmaakler OÜ) | 12908816 |
| SERENE OÜ | 14216991 |
| MIRESS OÜ | 10829076 |
| SARONS OÜ kustutatud | 11546765 |
| SARENSX OÜ kustutatud (former name FeatureNinjas OÜ) | 14823047 |
| PIRENA OÜ kustutatud | 11749178 |
| ORIENS OÜ | 11257185 |
| SARNES OÜ | 10041230 |
| SCIENS OÜ | 14433978 |
| EIRENE OÜ | 12416970 |
| KIVENS OÜ | 16563337 |
| MIRENT OÜ | 14951710 |
| MIRENE OÜ | 16409381 |
| SAIENS OÜ kustutatud | 10883029 |
| DIMENS OÜ | 11015513 |
| LIBENS OÜ | 16016865 |
| AIRENT OÜ | 16224865 |
| MERENS OÜ | 14869411 |
| SERENA OÜ | 14721482 |
| JURENS OÜ kustutatud | 10823719 |
| MIRENO OÜ kustutatud | 12168688 |
| SEREKS OÜ | 14282893 |
| SERENA HOLDING OÜ | 11085428 |
| SEREKS TRADE OÜ (former name Sereks Trade UÜ) | 14164768 |
| SERENA EURO OÜ | 16915977 |
| FIDENS INVEST OÜ | 14664689 |
| SERENE CREATIONS OÜ | 17111034 |
| ARETE SCREENS OÜ kustutatud | 14532692 |
| MARENS TRADE OÜ (former name Marens Trade UÜ) | 14369447 |
| SERENE SLEEP OÜ | 16827782 |
| SERENA VITA OÜ | 17210279 |
| SERENE REISIBÜROO OÜ kustutatud | 10692022 |
| SAIREKS GROUP OÜ | 16151178 |
| LURENS SEQOI OÜ | 16238749 |
| SERENE LILLED OÜ | 10981565 |