| Company name | Reg. code |
|---|---|
| RTJ INVEST OÜ | 12252741 |
| RTM INVEST OÜ | 17430472 |
| RTG INVEST OÜ (former name HL Ilunurk OÜ) | 16486921 |
| RTH INVEST OÜ | 12388015 |
| RTS INVEST OÜ | 16890740 |
| RMJ INVEST OÜ (former name Eesti Koolitus- ja Konverentsikeskus OÜ) | 12005971 |
| SPARKPIPE OÜ (former name RKJ Invest House OÜ) | 16540365 |