| Company name | Reg. code |
|---|---|
| LESTRION OÜ | 12710600 |
| LESTRIX OÜ kustutatud | 12439014 |
| LESTROM OÜ | 12531240 |
| LESTON OÜ | 14503561 |
| NASTRION OÜ (former name Nastrion UÜ) | 14648420 |
| ELESTRON OÜ | 11923699 |
| CESTION OÜ kustutatud | 11388208 |
| LECTRON OÜ (former name Nguyen OÜ) | 14469930 |
| TESTRIN OÜ | 11187102 |
| METRION OÜ | 17357321 |
| LEYTRON OÜ kustutatud | 14577039 |
| GESTRON OÜ | 16125086 |
| EESTION OÜ | 12295466 |
| ESTRON OÜ | 17290373 |
| DESTRIN GROUP OÜ | 12825467 |
| ASTRION INVEST OÜ | 11055547 |
| MESTRON GRUPP OÜ (former name AS MESTRON GRUPP) | 10525850 |
| GESTION HOUSES OÜ | 17013515 |
| LEKTRON GRUPP OÜ | 10462821 |
| ESTRON ETEK OÜ kustutatud | 14396183 |
| ESTRON PRO OÜ | 10527665 |
| ESTRON HOLDING OÜ (former name Estron Holding UÜ) | 14715932 |
| ESTRON TEENUSED OÜ | 12797475 |
| ESTRIN EHITUS OÜ | 11998964 |
| ESTRON DEMONTAGE OÜ (former name Hakon2 OÜ) | 14323712 |
| GESTION INTERNACIONAL ASESORIA OÜ | 17209135 |
| BLACKFOREST OÜ (former name Gentrion Grupp OÜ) | 14483232 |
| JAWAHARIAL NDABANINGI OÜ (former name ESTRON EHITUS OÜ) | 14332898 |
| BULUK MIMAKIMI OÜ kustutatud (former name Brugmansia OÜ) | 12956695 |