| Svenska Undervattensentreprenader AB CVR 5565678785 | BoardBoard of Directors | Since 2026 | — | Active |
| Bayspray Invest AB CVR 5568028392 | BoardBoard of Directors | Since 2022 | — | Active |
| Uw-Tech AB CVR 5569195539 | BoardBoard of Directors | Since 2026 | — | Active |
| Land & Dykservice Nord AB CVR 5569783201 | BoardBoard of Directors | Since 2026 | — | Active |
| SVENSKA UNDERVATTENSENTREPRENADER MASKIN AB CVR 5592278203 | BoardBoard of Directors | Since 2026 | — | Active |
| Uw-Tech Group AB CVR 5593089138 | BoardBoard of Directors | Since 2026 | — | Active |
| Offshore-Tech Sweden AB CVR 5593890568 | BoardBoard of Directors | Since 2026 | — | Active |
| Flying Jib Equity AB CVR 5594336298 | BoardBoard of Directors | Since 2023 | — | Active |
| Swe-Sub Marin AB CVR 5594588468 | BoardBoard of Directors | Since 2026 | — | Active |
| Projekt V TopCo AB CVR 5594682501 | BoardDeputy Board Member | Since 2024 | — | Active |
| RMS HoldCo AB CVR 5594682519 | BoardDeputy Board Member | Since 2024 | — | Active |
| Road Mobility Services WS AB CVR 5594682527 | BoardDeputy Board Member | Since 2024 | — | Active |
| Road Mobility Services RSA AB CVR 5594714635 | BoardDeputy Board Member | Since 2024 | — | Active |
| Road Mobility Services Group (RMS GROUP) AB CVR 5594744012 | BoardDeputy Board Member | Since 2024 | — | Active |
| CE SV III AB CVR 5594868811 | BoardDeputy Board Member | Since 2024 | — | Active |
| UW-Tech Marine AB CVR 5595099622 | BoardBoard of Directors | Since 2026 | — | Active |
| Sub Marin Holding AB CVR 5595324434 | BoardBoard of Directors | Since 2026 | — | Active |
| Swe-Sub Equipment AB CVR 5595324517 | BoardBoard of Directors | Since 2026 | — | Active |
| Esther InvestCo AB CVR 5595532564 | BoardBoard of Directors | Since 2026 | — | Active |
| Esther MidCo AB CVR 5595532572 | BoardBoard of Directors | Since 2026 | — | Active |
| Esther BidCo AB CVR 5595532580 | BoardBoard of Directors | Since 2026 | — | Active |
| Uw-Tech Engineering AB CVR 5595579029 | BoardBoard of Directors | Since 2026 | — | Active |
| Esther MipCo AB CVR 5595837815 | BoardBoard of Directors | Since 2026 | — | Active |