| Company name | Reg. code |
|---|---|
| OSS OÜ | 10070556 |
| RSD OSS OÜ (former name Enzode OÜ) | 16037867 |
| OSS EST OÜ (former name Amsvp finance OÜ) | 14127974 |
| OSS GROUP OÜ | 16007688 |
| OSULA OSS OÜ | 10351841 |
| OSS GRUPP OÜ kustutatud | 11978789 |
| ALINSA OSS OÜ | 17160788 |
| KANDLE OSS OÜ | 16871889 |
| RAKVERE OSS OÜ kustutatud | 10401585 |
| VAN OSS IT OÜ | 12701914 |
| VAN OSS GROUP OÜ | 12550355 |
| OSS BALTIC BTL OÜ | 14868216 |
| VAN OSS KONSULT OÜ | 14283740 |
| OSS PERFORMANCE EUROPE OÜ (former name Bet Rak OÜ) | 12584839 |
| OSS - OUTSOURCE SALES SERVICE OÜ kustutatud | 14734929 |
| OSSI PÕLD OÜ | 12145502 |
| OSSI EHITUSGRUPP OÜ kustutatud | 11425122 |
| KÕŠŠ MÕŠŠ OÜ | 12915578 |
| OSSO OÜ kustutatud | 12287194 |
| OSSOM OÜ | 16422861 |
| OSSIK OÜ | 11148496 |
| ORMSÖ SHEEP OÜ (former name Ossa OÜ) | 12843755 |
| OSSMET OÜ | 10234265 |
| OSSOBAT OÜ | 16603137 |
| OSSIORG OÜ | 16629562 |
| OSSBUILT OÜ | 10241489 |
| OSSARAKS OÜ | 12186145 |
| OSSOLIGHT OÜ kustutatud | 14228103 |
| OSSAPOISS OÜ | 11519455 |
| OSSUARIUM OÜ | 16807756 |
| "OSSIPE TALU" OÜ (former name Ossipe Talu) | 10735406 |
| OSSIRIANDA OÜ kustutatud | 10262451 |
| OSSOMTOSSOM OÜ | 14964279 |
| OSSARG INVEST OÜ | 17072966 |
| OSSIPOV EVENTS OÜ | 14764741 |
| STRUCTURA OSSIS OÜ | 17278277 |
| J & I OSSIPOV GRUPP OÜ | 12417805 |
| ESS.O.ESS OÜ | 16004359 |
| OSSU BURGER TALLINN OÜ kustutatud | 16228308 |
| OSB OÜ kustutatud | 12148587 |
| BOSS OÜ | 16371359 |
| CSS7 OÜ kustutatud | 14225820 |
| ÕIS OÜ | 14612474 |
| HSS OÜ kustutatud | 11538978 |
| OSC OÜ | 12541416 |
| OHS OÜ | 10116940 |
| FOSS4 OÜ | 12495069 |
| JOSS OÜ kustutatud | 11660414 |
| OSE OÜ | 10383964 |
| ORS123 OÜ kustutatud (former name Oristano OÜ) | 14515624 |