| Company name | Reg. code |
|---|---|
| OTTSON OÜ | 10784741 |
| INGATLAN OTTHON OÜ (former name OÜ Kederer KV) | 10230818 |
| OTTENSON OÜ | 14322919 |
| OTTOSI TECH OÜ | 17437089 |
| OTTHAN KINNISVARA OÜ | 10387106 |
| REIN OTTOSONI PURJESPORDIKOOL OÜ | 10683603 |
| RUTA OTTESSON HAMBARAVI OÜ | 10774369 |
| VATSON & VATSON OÜ | 10220798 |
| OTIVON OÜ (former name Audo Kowitz OÜ) | 14539205 |
| OMISON OÜ | 16025634 |
| OTSASON OÜ | 17474179 |
| COTTON OÜ | 12424656 |
| VATSON OÜ | 12586620 |
| LATSON OÜ | 10708450 |
| TOMSON OÜ | 12222740 |
| OTOSEN OÜ kustutatud | 14751282 |
| TOOTSON OÜ | 14192747 |
| OSTRON OÜ kustutatud | 14957799 |
| NOTTON OÜ kustutatud | 12798026 |
| HETSON OÜ | 16441737 |
| JETSON OÜ | 11627564 |
| ARTSON OÜ | 12940151 |
| METSON OÜ | 14374081 |
| OLSSON OÜ | 10699751 |
| RITSON OÜ kustutatud | 10078428 |
| RATSON OÜ | 16137280 |
| EHTSON OÜ | 17232542 |
| OPTION OÜ | 14067781 |
| PETSON OÜ | 12220149 |
| OTTOL OÜ | 14398495 |
| OTTOS OÜ | 12182503 |
| OTTOK OÜ | 14569962 |
| OTTAN OÜ | 12903552 |
| PETTSON INVENTS OÜ | 17139972 |
| TOMSON TERVISEKESKUS OÜ (former name Perearst Riina Tomson OÜ) | 11991614 |
| OPTION ONE OÜ | 14466104 |
| ORISON CONSULTIN OÜ kustutatud | 16176244 |
| OPTION OMS OÜ kustutatud | 12147257 |
| TOMSON INVEST OÜ | 16037991 |
| TOMSON SOLUTIONS OÜ | 14898306 |
| TOMSON HOLDING OÜ | 14239696 |
| OULSON OUTSOURCING OÜ | 11097639 |
| TOMSON TOYS OÜ (former name Tomson Distribution OÜ) | 12028647 |
| TOMSON CAPITAL OÜ | 16678738 |
| RITSON TRADE OÜ | 10887576 |
| DOTTON CORPORATION OÜ kustutatud | 16942365 |
| COTTON TRADE OÜ kustutatud | 12939403 |
| TOMSON WHOLESALE OÜ (former name Tomson Toys OÜ) | 17332611 |
| KONTSON DEFENSE OÜ | 16448103 |
| TONTSON GRUPP OÜ | 14941806 |