| Company name | Reg. code |
|---|---|
| CALVON OÜ | 17433878 |
| CALVOR OÜ | 10321679 |
| CALVIN CONSULT OÜ | 16038275 |
| CALLVOX OÜ | 17467209 |
| CALHOUN OÜ | 11533231 |
| CALVINO OÜ kustutatud | 12330257 |
| CALSTON OÜ | 11407808 |
| CALVIA OÜ | 16334016 |
| CALVIR KLAAS OÜ | 12769042 |
| CALVINI EST OÜ | 11512329 |
| CALEMON HALDUSE OÜ | 10894760 |
| CALROB IT OÜ | 16728092 |
| ALVON OÜ | 16962646 |
| CARBON-6 OÜ | 16145628 |
| CAPCON OÜ kustutatud | 14617572 |
| CANTON OÜ | 10846488 |
| CAXTON OÜ | 12802395 |
| DALTON OÜ | 12485422 |
| DALION OÜ (former name Rahhudis OÜ) | 14262382 |
| CARVAN OÜ | 14092750 |
| CARTON OÜ | 12149606 |
| CASPON OÜ | 16949315 |
| CARVOL OÜ | 17160274 |
| ELLVON OÜ kustutatud | 12726771 |
| CAMION OÜ | 11235232 |
| CLAVOS OÜ | 14310603 |
| CRAIVON OÜ | 11370823 |
| CANNON OÜ kustutatud | 14273457 |
| CABRON OÜ kustutatud | 14567687 |
| CATION OÜ | 14415756 |
| CALDO CONSULTING OÜ | 17172857 |
| CALMO STUDIO OÜ | 16067756 |
| CALOR NORDIC OÜ | 16098107 |
| CARBON REDUCTION CARBON TRADING OÜ kustutatud | 16468142 |
| SETOMAA HALDUS OÜ (former name OÜ Verska Calor) | 10322845 |
| CARBON FARMS OÜ kustutatud | 14911604 |
| CARBON GLOBAL OÜ (former name OneOakLabs OÜ) | 16303524 |
| CARBON INVESTMENT OÜ kustutatud | 12139080 |
| CARVAN TRADING OÜ kustutatud | 12903948 |
| CANYON INVEST OÜ | 14080445 |
| CARSON TECHNOLOGIES OÜ | 16944559 |
| FOXCAP CARBON OÜ | 17215006 |
| CARBON.EE OÜ kustutatud | 11528559 |
| CELION ESTONIA OÜ | 17472989 |
| DALTON HOLDING OÜ kustutatud | 10303316 |
| DALTON EESTI OÜ kustutatud | 11693124 |
| DALTON BALTIC OÜ | 11265115 |
| CARBON OFFSET OÜ | 16348030 |
| CANYON DEVELOPMENT OÜ | 12534474 |
| CARBON LIFE OÜ | 17228405 |