| Company name | Reg. code |
|---|---|
| MTR OÜ | 12133864 |
| MTR TEED OÜ kustutatud | 11267500 |
| MTR GRUPP OÜ | 14524994 |
| MTR PAINT OÜ | 12448311 |
| MTR MARINE OÜ | 14002132 |
| METALL MTR OÜ kustutatud | 12229794 |
| MTR EKSPERT OÜ | 12532506 |
| MTR HOLDING OÜ (former name Mugatu OÜ) | 12356156 |
| MTR HALDUSE OÜ | 12249549 |
| MTR ARENDUS OÜ | 12246338 |
| MTR TEENUSED OÜ | 11370898 |
| MTR SOFTWARE OÜ kustutatud | 12986940 |
| MTR-PALVELUT OÜ kustutatud | 12308275 |
| MTR AUTOMATION OÜ | 10854231 |
| MTR PROPERTIES OÜ kustutatud | 11248855 |
| MTR ENGINEERING OÜ | 12158982 |
| MTR KINNISVARABÜROO OÜ | 11346167 |
| MTR REAL ESTATE OÜ kustutatud | 12384342 |
| MTR CAR TRADING & SERVICE OÜ kustutatud (former name MTR CAR TRADING OÜ) | 12900401 |
| MTRTCH OÜ | 16564130 |
| MTREINES OÜ kustutatud | 14895325 |
| FEU MTRADE OÜ | 16347906 |
| MIR-MAR TALUKAUBAD OÜ | 14297044 |
| KASKOD - MTRONIX OÜ | 12726216 |
| MAR MAR OÜ kustutatud | 14316959 |
| MAR MAR ESTONIA OÜ | 16385338 |
| MAR.MAR AGENCY OÜ (former name Sewbroker OÜ) | 12654824 |
| LTR OÜ | 14112694 |
| MSR OÜ | 11514297 |
| MTF OÜ | 12061567 |
| MFR OÜ | 16620006 |
| MRTR OÜ (former name OPC Baltic OÜ) | 12357109 |
| MIR-22 OÜ kustutatud | 11054370 |
| KTR OÜ | 16358198 |
| MER OÜ | 12853143 |
| MIR OÜ | 11542000 |
| MAR OÜ | 12912002 |
| 1MLR OÜ | 12623060 |
| MTH OÜ | 12637270 |
| GTR OÜ | 11431625 |
| MAR6 OÜ | 16889990 |
| MLR OÜ kustutatud | 16278660 |
| 888MIR OÜ kustutatud | 12353896 |
| METR. OÜ kustutatud | 16029000 |
| MPR OÜ | 14177145 |
| MNR OÜ | 11029107 |
| MTK OÜ kustutatud | 12665130 |
| BTR90 OÜ | 16714768 |
| MRR OÜ | 12731418 |
| ETR OÜ | 16507511 |