| Company name | Reg. code |
|---|---|
| SINGE OÜ | 12938214 |
| SINGEL OÜ | 14549238 |
| ALBUM & SINGEL OÜ kustutatud | 10062048 |
| SINGER GOURMET OÜ kustutatud | 14079324 |
| SINGH & SINGH OÜ | 14763374 |
| SINCE 95 OÜ | 14148031 |
| SINCE 2025 OÜ | 17156505 |
| SINE-1 OÜ | 11201434 |
| VAHUR SINGA OÜ (former name Outcrowd OÜ) | 14040428 |
| SINGH ESTONIA OÜ kustutatud | 12045427 |
| SINGH FOODS OÜ | 16847187 |
| SINGH INTERNATIONAL OÜ | 17390092 |
| SINGLE MODERATE OÜ | 10480975 |
| SAARE-SINGA OÜ | 12280461 |
| SINGH TAKSO OÜ | 17130764 |
| SINGH CANNING OÜ | 16596584 |
| SINGH TRADING OÜ | 16259119 |
| SINGLE BYTE OÜ | 14423046 |
| SINGO KAUBANDUS OÜ kustutatud | 10593076 |
| MÄE-SINGA OÜ kustutatud | 11652020 |
| SINCE1968.ORG OÜ | 17237717 |
| R SINGH OÜ | 12742416 |
| SINGH & COMPANY OÜ kustutatud | 12226755 |
| SINCE DESIGN OÜ kustutatud | 12430102 |
| SINGLE.EARTH OÜ (former name Local Offset OÜ) | 14873080 |
| SINE SCIENCE OÜ | 16874669 |
| SINE DESIGN OÜ | 14825572 |
| SINE VARA OÜ | 14697045 |
| SINGH TANWAR HOLDING OÜ | 17052099 |
| SINGLE FIN LABS OÜ | 14436793 |
| SINGH BROTHERS TRANSPORT OÜ | 17034670 |
| SINE QUA NON OÜ | 12094242 |
| SING SALE PRO OÜ | 12608474 |
| SINGELTON OÜ | 11119224 |
| PARKER MEDIA OÜ (former name Every Single Day OÜ) | 14312648 |
| DOPING GROWTH OÜ (former name Utopos OÜ) | 12931637 |
| RINGE OÜ | 12100340 |
| SIRGE OÜ (former name Kopralaane-Kesapõllu Aiasaadused OÜ) | 12828069 |
| PINGE24 OÜ | 16684451 |
| PINGE OÜ | 10463899 |
| ADYRAA OÜ (former name Investor Nations OÜ) | 16125927 |
| SÜNGE MAA OÜ | 17416957 |
| VÄIKE PINGE OÜ kustutatud (former name Fast Expo OÜ) | 14353073 |
| SIRGE VAGU OÜ | 16036075 |
| SIGNE KODUHALDJAS OÜ kustutatud | 14047583 |
| PINGE HOOLDUS OÜ (former name Põhja- Eesti hooldus Grupp OÜ) | 14326656 |
| HINGE TUULUTUS OÜ | 16035242 |
| SIRGE SEIN OÜ | 11419742 |
| VINGE SOFT OÜ kustutatud | 14136714 |
| SIGNE NOPPEL OÜ | 16498999 |