| Company name | Reg. code |
|---|---|
| FIRGUS OÜ | 14604078 |
| FIRMUS OÜ | 11368720 |
| INFOBÜROO FIRMUS OÜ | 10821175 |
| CANTUS FIRMUS OÜ | 12662628 |
| FIRMUS CAPITAL OÜ kustutatud | 12933381 |
| FIRMUS GRUPP OÜ | 11284816 |
| FIRMUS ELEKTER OÜ | 11340911 |
| FIREUP OÜ | 14426808 |
| FIRNAS ENGINEERING SOLUTIONS OÜ | 14875162 |
| FRIGUS OÜ kustutatud | 10086095 |
| FERGUS OÜ | 16235030 |
| OPUS FRIGUS OÜ | 14224022 |
| KERGUS OÜ | 14890842 |
| FREGUS OÜ kustutatud | 12780291 |
| FERBUS OÜ kustutatud | 12314100 |
| CIRRUS OÜ | 12086610 |
| KIIRGUS OÜ | 16738943 |
| CIRIUS OÜ | 16108202 |
| HINGUS OÜ | 17267960 |
| AMRGUS OÜ | 14523144 |
| FILIUS OÜ | 11939677 |
| FORPUS OÜ | 14807686 |
| FINBUS OÜ | 16487211 |
| CIRQUS OÜ | 16585712 |
| FINDUS OÜ | 16773862 |
| FIBRIUS OÜ | 17309799 |
| FISKUS OÜ kustutatud | 10327096 |
| FIRAS OÜ | 14774981 |
| BIGGUS SALESUS OÜ | 17401453 |
| FORTUS CAPITAL OÜ (former name Fortus Capital Group OÜ) | 12281464 |
| FUNGUS TECHNOLOGY OÜ kustutatud | 16287446 |
| JURGUS TORUTÖÖD OÜ | 12909721 |
| FORPUS TRADE OÜ | 14184141 |
| FORTUS TRADE OÜ kustutatud | 12072743 |
| ARIGUS SL OÜ kustutatud | 12461255 |
| FAIRMUS TECHNOLOGIES OÜ (former name The Useless Company OÜ) | 16115366 |
| HIRCUS HOLDINGS OÜ | 17244640 |
| FORMUS MÖÖBEL OÜ | 10684413 |
| KINGUS EHITUS OÜ (former name SAVAMO OÜ) | 14347836 |
| FORTUS COMPANY OÜ | 14151168 |
| FORMUS PARTNERS OÜ (former name Formus Partners UÜ) | 14875854 |
| NFV AIRGUNS OÜ | 16155644 |
| HIRMUS VAHVA OÜ | 16856341 |
| FORTUS ENERGY OÜ | 12420575 |
| NIKULIN CIRCUS OÜ | 12584398 |
| CIRCUS ABSURDUM OÜ | 16667516 |
| FRIGUM TRADE OÜ kustutatud | 11031038 |
| OLEMISE KERGUS OÜ | 14184096 |
| FIBIUS DEV OÜ | 16450277 |
| ELAMISE KERGUS OÜ | 14427498 |