| Company name | Reg. code |
|---|---|
| MYSTEEL OÜ | 14184481 |
| MYSTERY TECH OÜ | 16176764 |
| MYSTERY GROUP OÜ | 10416523 |
| ROYAL MYSTERY OÜ | 16207453 |
| MYSEL OÜ | 16066722 |
| MAGICAL MYSTERY COMPANY OÜ | 16890970 |
| MYSTERY GROUP TA OÜ | 12579057 |
| TERAAPIAKESKUS OÜ (former name Mystial OÜ) | 16606615 |
| GYOKKON BUNGZUNG OÜ (former name Mystery Consult OÜ) | 16780448 |
| MESTTEL OÜ | 16827061 |
| OISTEEL OÜ | 17129436 |
| GOSTEEL OÜ kustutatud | 12024247 |
| ESTEEL OÜ (former name Scandinavian Rent OÜ) | 14451404 |
| SYSTEEM AZUR OÜ | 16816614 |
| SSSTEEL TRADE OÜ | 16926969 |
| STEEL OÜ | 14225524 |
| ESTEEL PROJECT OÜ | 12240040 |
| DYSTEE COMMERCE OÜ kustutatud | 16320830 |
| XSTEEL INTERNATIONAL OÜ | 12877582 |
| SANDWIN.STORE OÜ (former name MedSteel OÜ) | 16762545 |
| F-STEEL OÜ kustutatud | 12619532 |
| PVT STEEL OÜ kustutatud | 11604770 |
| RKK STEEL OÜ kustutatud (former name MHO Eesti OÜ) | 11455057 |
| STEEL ART OÜ kustutatud | 12454775 |
| HAPPY STEEL OÜ (former name Donna & Jan Ekstedt Holding OÜ) | 12681293 |
| STEEL CUBE OÜ | 16962936 |
| PLEKK & STEEL OÜ | 14450422 |
| FOREST STEEL OÜ | 11242516 |
| STEEL INVEST OÜ kustutatud | 12338543 |
| MAGNUM STEEL OÜ | 11726444 |
| RR STEEL OÜ | 14106357 |
| MARVE STEEL OÜ | 14687377 |
| STEEL SERVICE OÜ | 11900095 |
| KS-STEEL OÜ kustutatud | 11894741 |
| STEEL CAPITAL OÜ kustutatud | 12040275 |
| VESTA STEEL OÜ (former name Stock Market Estonia OÜ) | 12512797 |
| PROTECH STEEL OÜ kustutatud | 12203547 |
| STEEL BUCKLE OÜ | 16060820 |
| MM STEEL OÜ kustutatud | 14337631 |
| BEST STEEL OÜ kustutatud | 12292456 |
| STEEL TRADERS OÜ kustutatud | 12941593 |
| RFX STEEL OÜ kustutatud | 11546937 |
| INNOVATIVE STEEL OÜ | 17192021 |
| DAN-STEEL OÜ | 11405763 |
| STEEL PROJECTS OÜ kustutatud | 12398657 |
| RV STEEL OÜ (former name Iru Parkla OÜ) | 12979228 |
| STEEL SUPPLIER OÜ kustutatud | 12201494 |
| STEEL SOLUTIONS OÜ | 14359093 |
| STEEL STUDIO OÜ | 16089628 |
| ALMART STEEL OÜ | 12066263 |