| Company name | Reg. code |
|---|---|
| DSÕ OÜ | 16966874 |
| DSONIQ OÜ | 16461016 |
| DSOULI OÜ kustutatud | 14849905 |
| DSOBIT OÜ | 16170276 |
| DSOKOSERVICES OÜ kustutatud (former name Prazdnik24 OÜ) | 12830770 |
| DOS2000 OÜ kustutatud | 12732903 |
| DSD OÜ | 12699867 |
| DSN OÜ | 14752519 |
| DSP OÜ | 14038390 |
| DSA OÜ | 12091502 |
| NSO OÜ (former name A.T.B OÜ) | 16199110 |
| DAO OÜ | 10943277 |
| OSO OÜ | 12229937 |
| RSO OÜ | 14019865 |
| 3DST OÜ (former name SiimSpace OÜ) | 12454634 |
| DSS OÜ | 16632423 |
| DPO OÜ kustutatud | 14446065 |
| DSG OÜ kustutatud | 12946260 |
| DSI CONSULTING OÜ | 12461663 |
| DPO2GO OÜ | 16291459 |
| DSP GLOBAL OÜ | 17408283 |
| DSM CONSULTING OÜ | 17046408 |
| PSO CONSULTING OÜ | 16943347 |
| DSP INVEST OÜ kustutatud (former name JGJ Invest OÜ) | 11921832 |
| DSH AC OÜ kustutatud | 16825990 |
| CSO SERVICE OÜ | 17473659 |
| SOLI DEO OÜ | 16177918 |
| DUO HOLDING OÜ | 16682987 |
| DSS RENT OÜ kustutatud | 16465675 |
| PZ DAO OÜ kustutatud | 16622100 |
| DUO PILDIRAAM OÜ kustutatud | 11418381 |
| DSL GROUP OÜ | 12881945 |
| DUO-NOTABLE OÜ | 16561284 |
| DAO HUA OÜ kustutatud | 16093104 |
| DSL KAUBAD OÜ | 16703933 |
| SEMTRUVARTO BSO OÜ (former name WGA Wood OÜ) | 14805842 |
| ISO PROFIT OÜ | 14313116 |
| DSK COMPANY OÜ | 16154946 |
| DSC OFF OÜ kustutatud | 16675312 |
| DSD TRADE OÜ | 11100532 |
| DMO COMMERCE OÜ | 17011396 |
| DVO INVESTMENT OÜ (former name DVO Investment UÜ) | 16349041 |
| DAO CAPITAL OÜ | 14096009 |
| KSO KAPITAL OÜ | 16439422 |
| DUO KONSULTATSIOONID OÜ | 10416658 |
| CHA DAO OÜ kustutatud | 12103395 |
| DSN TRADING OÜ kustutatud | 11725539 |
| SKI-DOO OÜ kustutatud | 12586637 |
| JOB2DOO OÜ kustutatud | 12115027 |
| DUO RMP OÜ | 16885288 |