| Company name | Reg. code |
|---|---|
| SICMA21 OÜ | 16613644 |
| 42 SIGMA OÜ | 16503826 |
| SIMMA OÜ | 14172153 |
| 2 SILMA OÜ | 11662098 |
| SIIMA OÜ | 12840165 |
| SIGMA VARA OÜ | 17283918 |
| SIGMA ZETA OÜ | 17131108 |
| SIGMA TRANSPORT OÜ | 10893163 |
| SIGMA AGENCY OÜ | 14622656 |
| SIRMA II OÜ kustutatud | 10243494 |
| KOLM SILMA OÜ | 14844925 |
| SIGMA PLAZA OÜ (former name OÜ Meeruse residentsid) | 17160877 |
| SILMA VÕLU OÜ | 14002729 |
| SIGMA RED OÜ (former name Nocturnal Invest OÜ) | 14208135 |
| SIGMA EVOLUTION OÜ kustutatud (former name Sigmabonus OÜ) | 14552482 |
| SILMAST SILMA OÜ | 14632867 |
| NELI SILMA OÜ | 16823092 |
| PAISTA SILMA OÜ kustutatud | 14008100 |
| SIGMA SERVICE OÜ | 11211102 |
| SIGMA LOGISTICS OÜ kustutatud | 12493261 |
| SIGMA RESEARCH OÜ | 11510939 |
| SILMA NURGAS OÜ | 17192200 |
| SIGMA ASSETS OÜ | 17131404 |
| SIGMA CONSULTING OÜ kustutatud | 12825622 |
| SIGMA COMPUTERS OÜ | 10793906 |
| SIGMA SOLUTIONS OÜ | 11460242 |
| SIGMA FILM OÜ (former name S-Film OÜ) | 11326029 |
| SIIMA KINNISVARA OÜ | 14281801 |
| SIGMA BEST OÜ (former name Svetlana Polonskaja OÜ) | 14138506 |
| SIGMA SIGNALS OÜ kustutatud | 12860239 |
| SIGMA PRODUCTIONS OÜ | 16925025 |
| SIGMA INVEST OÜ | 14134201 |
| SIGMA RAAMATUPIDAMINE OÜ | 11505967 |
| SIGMA ASSETS 2 OÜ | 17356830 |
| BÜROO SIGMA OÜ kustutatud | 10888038 |
| SIMA EHITUSE OÜ | 10360298 |
| SIMA GROUP OÜ | 17168637 |
| OOO SIGMA LINKEDINGRUPP OÜ kustutatud (former name OÜ LinkedinGrupp) | 14278673 |
| SIGMA TRADE BT OÜ kustutatud | 10486624 |
| SIGMA POLYMER GROUP OÜ (former name Trelleborg Industrial Products Estonia OÜ) | 10187689 |
| KUUE SIGMA TEE OÜ (former name Padise mõisa restoran OÜ) | 16945056 |
| SIGMA REAL ESTATE OÜ | 10806247 |
| THÉTA SIGMA INDUSTRIES OÜ | 17040771 |
| SIGMA AUTOD JA KAUBAD OÜ | 10024527 |
| SIGMA SOFTWARE EDTECH CENTER OÜ | 17269309 |
| SIMA LANDSCAPE ARCHITECTURE AND DESIGN OÜ | 16968672 |
| SILMATERAOPTIKA OÜ (former name `sinu 2 silma` OÜ) | 12618432 |
| MIPROJEKT OÜ (former name Simma Teenused OÜ) | 11533998 |
| RAPLA RATSAKESKUS OÜ (former name Kolmanda Silma Festival OÜ) | 14241351 |