| Company name | Reg. code |
|---|---|
| TIRION OÜ | 14173738 |
| TIRIN OÜ kustutatud | 11885102 |
| TIRIN.R OÜ | 16787723 |
| TIRINI OÜ (former name OÜ Tirini) | 16995769 |
| MIRION OÜ | 12726587 |
| TRION OÜ (former name Tramadorus OÜ) | 12329432 |
| TIRIAK OÜ | 12175408 |
| TIRITHON OÜ | 17078271 |
| TIRIJA OÜ | 11202250 |
| TIRONE OÜ | 14722168 |
| MIRION TECH OÜ | 17217034 |
| TRIION GAMING OÜ | 16785977 |
| AIRION TECHNOLOGIES OÜ (former name RR Holding & Management OÜ) | 17179440 |
| MINION OÜ | 12191838 |
| MIRIDON OÜ | 10288255 |
| CITION OÜ (former name Cition UÜ) | 16397755 |
| KIXION OÜ | 17219352 |
| AIRIIN OÜ | 11922961 |
| BINION OÜ | 10953511 |
| MERION OÜ | 12056224 |
| CIRKON OÜ | 10734370 |
| ITERION OÜ | 12957810 |
| AIRCON OÜ | 16610611 |
| MIRCON OÜ kustutatud | 12811324 |
| AGRION OÜ kustutatud | 11045856 |
| LILION OÜ | 16441443 |
| HERION OÜ | 12188262 |
| AMRION OÜ | 10951328 |
| FERION OÜ | 12471650 |
| BIRXON OÜ | 14091555 |
| MARION OÜ | 12916856 |
| LIBRION OÜ (former name Berlin Tercüme OÜ) | 17036485 |
| BIRMON OÜ (former name Kaljula 2022 OÜ) | 14540059 |
| TIRIT OÜ | 17463879 |
| TIRMO OÜ kustutatud | 14120699 |
| TERION SUISSE NORTH OÜ kustutatud | 12513058 |
| MINAS TIRITH OÜ | 12761773 |
| TIRMAN KONSULT OÜ (former name Nadja Koogid OÜ) | 14608892 |
| TIRKEN PROJEKT OÜ | 10790306 |
| MIRIIN ADVISORY OÜ | 17075479 |
| LOS LIRIOS OÜ kustutatud | 12131173 |
| MERION HALDUSE OÜ | 11121876 |
| MIRSON INVEST OÜ kustutatud | 12382515 |
| KAIRION GROUP OÜ | 17477752 |
| FORION INVEST OÜ kustutatud | 11550011 |
| FORION GRUPP OÜ | 11548787 |
| MARION ENTERPRISE OÜ kustutatud | 12827874 |
| MARION BÜROO OÜ kustutatud | 10044659 |
| AIRCON PARTNER OÜ kustutatud | 12035149 |
| MARION VEOD OÜ kustutatud | 11749043 |