| Company name | Reg. code |
|---|---|
| HORTONS OÜ | 12291333 |
| HORTON HM OÜ | 11557486 |
| HORTON EHITUS OÜ kustutatud | 11427517 |
| HORIZONS OÜ | 12242346 |
| HORTOM OÜ | 10058986 |
| HORTUS OÜ | 10052570 |
| SOLUTIONS HORIZONS OÜ | 16764662 |
| WIDE HORIZONS OÜ kustutatud | 14761429 |
| CELESTIAL HORIZONS OÜ kustutatud | 16059805 |
| BR HORIZONS OÜ kustutatud | 16655306 |
| TRICOASTAL HORIZONS OÜ | 12675683 |
| SHIFTING HORIZONS OÜ kustutatud | 16851332 |
| HORIZONS VENTURES OÜ | 14643552 |
| THARSIS HORIZONS OÜ kustutatud | 16618593 |
| K HORIZONS OÜ | 16954138 |
| NEW HORIZONS OÜ | 14413102 |
| SHINY HORIZONS OÜ kustutatud | 14417650 |
| FAR HORIZONS OÜ (former name Chadwick OÜ) | 14863934 |
| HOROS OÜ | 14190567 |
| HORTOR INVEST OÜ | 11072563 |
| HORTUS VINUM OÜ | 16588018 |
| HORTES GARDENING OÜ kustutatud | 14139919 |
| HORTUS MEDICUS OÜ | 11881452 |
| HORIZONS EXECUTIVE COACHING OÜ | 17367638 |
| AA HOLDING HORIZONS OÜ kustutatud | 16595939 |
| HORNS & HOOFS OÜ | 14196490 |
| HOROS GRUPP OÜ | 16860638 |
| INTERNATIONAL FOUNDATION FOR FUTURE HORIZONS OÜ | 14338211 |
| SERALENGE VEVEDEENE OÜ (former name OÜ Hortinus) | 14116999 |
| CORTONA OÜ kustutatud | 14583962 |
| KORTONOS OÜ kustutatud (former name BPG OÜ) | 11690203 |
| BARTONS OÜ | 11469160 |
| PROTONS OÜ | 14730423 |
| BLOCCO OÜ (former name Holding Horizons OÜ) | 14599578 |
| HOSTON OÜ kustutatud | 10191704 |
| FORTON OÜ | 12317883 |
| HARTON OÜ | 12424194 |
| PORTON OÜ | 16191982 |
| MORTON OÜ | 14538298 |
| SORTON OÜ | 14858726 |
| PORTOS OÜ | 12034487 |
| CORTONA FX OÜ kustutatud | 12825852 |
| WHORTON CAPITAL OÜ kustutatud | 11210321 |
| FORDONS & FASTIGHETSANALYS OÜ | 11594511 |
| HOTON OÜ | 14847898 |
| HOXTON VENTURES OÜ | 17387612 |
| NORTON ARENDUS OÜ | 11034396 |
| COTONS KV OÜ | 10334618 |
| MORTON PROJECT OÜ kustutatud (former name Morton Project UÜ) | 12956583 |
| NORTON TRADE OÜ | 12317825 |