| Company name | Reg. code |
|---|---|
| GSV WELDING OÜ | 11381206 |
| GSC HOLDING OÜ | 12801403 |
| RSV HOLDING OÜ | 14135583 |
| ESV HOLDING OÜ kustutatud | 12292261 |
| LSV HOLDING OÜ | 12258850 |
| GSR HOLDING OÜ (former name Mergersteel OÜ) | 14912199 |
| BSV HOLDING OÜ | 16693979 |
| GLV HOLDING OÜ | 16656613 |