| Company name | Reg. code |
|---|---|
| FERNE OÜ | 17214416 |
| FERME OÜ | 14162284 |
| FERN OÜ | 16418776 |
| FERE OÜ | 10102670 |
| FERTE LOGISTICS OÜ | 16395986 |
| FERNA DESIGN OÜ | 17274826 |
| FERME KINNISVARA OÜ | 17230307 |
| FERN VALDUSE OÜ | 16088942 |
| FERN TEENUSED OÜ | 16784015 |
| FG67 HOLDING OÜ (former name Ferme Grupp OÜ) | 16308438 |
| FERNEBELD OÜ kustutatud | 10527493 |
| BOUGANLERDA FERNEDAMI OÜ kustutatud (former name Tegris 7 OÜ) | 14331232 |
| HERNE KAUPLUSE OÜ | 10088409 |
| GERNE GRUPP OÜ | 10528392 |
| LE FRENE OÜ (former name Snok OÜ) | 14131088 |
| HERNE KODUMAJUTUS OÜ kustutatud | 12491641 |
| HERNE KODUPARK OÜ | 17426447 |
| GERNE EHITUS OÜ | 16256411 |
| ICCERA OÜ kustutatud (former name James Herne OÜ) | 12813719 |
| PARGEL OÜ (former name Colspo Disain OÜ) | 12514655 |