| Rejlers Sverige AB CVR 5560510272 | BoardBoard of Directors | Since 2020 | — | Active |
| Helenius Ingenjörsbyrå Aktiebolag CVR 5560977851 | BoardBoard of Directors | Since 2022 | — | Dissolved |
| KLT Konsult Aktiebolag CVR 5561469783 | BoardBoard of Directors | Since 2020 | — | Active |
| Eurocon Engineering AB CVR 5563843407 | BoardBoard of Directors | Since 2022 | — | Active |
| Rejlers Defence & Security AB CVR 5564488079 | BoardBoard of Directors | Since 2021 | — | Active |
| pidab AB CVR 5564883204 | BoardBoard of Directors | Since 2022 | — | Active |
| Acuvi AB CVR 5565396396 | BoardBoard of Directors | Since 2024 | — | Active |
| Eurocon SiteBase AB CVR 5565443164 | BoardBoard of Directors | Since 2020 | — | Active |
| SOLVINA AB CVR 5565470761 | BoardBoard of Directors | Since 2024 | — | Active |
| Rörkraft Syd AB CVR 5565627345 | BoardBoard of Directors | Since 2026 | — | Active |
| Risk Pilot AB CVR 5566348453 | BoardBoard of Directors | Since 2025 | — | Active |
| Eurocon Consulting AB CVR 5567363188 | BoardBoard of Directors | Since 2022 | — | Active |
| Ferroamp AB (publ) CVR 5568057029 | BoardBoard of Directors | Since 2024 | — | Active |
| C3 Konsult AB CVR 5569428393 | BoardBoard of Directors | Since 2021 | — | Active |
| Rejlers Energiprojekt AB CVR 5569827131 | BoardBoard of Directors | Since 2020 | — | Active |
| Stena Trade & Industry AB CVR 5590699210 | BoardBoard of Directors | Since 2026 | — | Active |
| Rörkraft Automation Syd AB CVR 5590861125 | BoardBoard of Directors | Since 2026 | — | Active |
| Eurocon Karlstad AB CVR 5592056096 | BoardBoard of Directors | Since 2022 | — | Active |
| Rörkraft Öst AB CVR 5592335839 | BoardBoard of Directors | Since 2026 | — | Active |
| Ingenjörsfirman Rörkraft AB CVR 5593254757 | BoardBoard of Directors | Since 2026 | — | Active |
| Eurocon Sydväst AB CVR 5593300006 | BoardBoard of Directors | Since 2022 | — | Active |
| Acuvi Sales AB CVR 5595331033 | BoardBoard of Directors | Since 2025 | — | Active |