| Company name | Reg. code |
|---|---|
| IGSC OÜ | 17473047 |
| ITSC OÜ | 12466005 |
| GSC HOLDING OÜ | 12801403 |
| GSC CONSULTATIONS OÜ kustutatud | 12108866 |
| ISC INTERNATIONAL OÜ | 12646664 |
| ISC BUILD OÜ (former name ISC Build UÜ) | 14077064 |
| GRUPO IGC OÜ | 17141325 |
| ISC CAPITAL OÜ kustutatud (former name ISC Capital UÜ) | 14076739 |
| GLOBAL SURVEYING COMPANY GSC OÜ kustutatud | 12375018 |
| ISC SERVICES AND CONSULTING OÜ | 14214070 |