| Company name | Reg. code |
|---|---|
| IRGAIN OÜ | 12716904 |
| IRGEN OÜ | 12120672 |
| INLAIN OÜ | 11407822 |
| TOGAIN OÜ | 16257340 |
| ERGLIN OÜ | 10207305 |
| RIGGIN OÜ | 16541057 |
| RIVAIN OÜ | 17058699 |
| AIRMAIN OÜ | 12494160 |
| INZAIN OÜ | 12740765 |
| ENGAIN OÜ kustutatud | 16290508 |
| IRAINA OÜ | 16170112 |
| INGLIN OÜ | 16623177 |
| BARGAIN OÜ (former name Pihlamäe ehitus OÜ) | 14778861 |
| INGAN OÜ kustutatud | 12730882 |
| RAGIN OÜ | 11620421 |
| BRAIN OÜ | 10915672 |
| IGMIN OÜ | 16230541 |
| ILAIN OÜ | 16382722 |
| VIRGIN CONSULTING OÜ | 12255751 |
| ARWAIN CONSULTING OÜ kustutatud | 14233297 |
| VIRGIN VENTURES OÜ | 12170753 |
| VIRGIN EARTH OÜ kustutatud | 11878875 |
| INGLIN CONSULT OÜ | 14865732 |
| MARGAIN EHITUS OÜ | 14692591 |
| ARLAIN STUDIO OÜ kustutatud (former name McGregor OÜ) | 12950764 |
| MEDIA TRAIN OÜ | 17280239 |
| BRAIN INK OÜ kustutatud | 11339983 |
| CLICK BRAIN OÜ | 14767544 |
| YOUNG AGAIN OÜ kustutatud | 16606118 |
| ERGIN CONSULTANCY OÜ kustutatud | 16533267 |
| GRAIN FOOD OÜ kustutatud | 11985453 |
| PANBALTIC TRAIN OÜ kustutatud | 11980311 |
| BRAIN HUB OÜ kustutatud | 14857916 |
| GREEN GRAIN OÜ (former name Eco Garlic OÜ) | 12891346 |
| ORGANIC GRAIN OÜ | 14409939 |
| WORLD GRAIN OÜ | 17001452 |
| MONEY TRAIN OÜ kustutatud | 11414868 |
| CREATIVE BRAIN OÜ (former name Direkt OÜ) | 14375123 |
| FAST TRAIN OÜ | 11221514 |
| IRSAI GROUP OÜ | 12274671 |
| GRAIN TRANS OÜ | 12855020 |
| SIPE GRAIN OÜ | 12901122 |
| IRWIN ART OÜ | 10088935 |
| GRAIN LOGISTIC OÜ | 14498274 |
| GRAIN TRADING OÜ kustutatud | 11441983 |
| IRSAN KAUBANDUS OÜ | 14687615 |
| BRAIN CAPITAL OÜ kustutatud | 14052532 |
| IGLIN CONSULTING OÜ | 14027221 |
| GRAIN FARMING OÜ | 11722436 |
| GT-GRAIN OÜ kustutatud | 14357415 |