| Rördoktorn N.E. Aktiebolag CVR 5562223296 | BoardBoard of Directors | Since 2025 | — | Active |
| VVS Montage Sverige AB CVR 5565597407 | BoardBoard of Directors | Since 2020 | — | Active |
| Asfalt Mark & Miljö 17 AB CVR 5567823330 | BoardBoard of Directors | Since 2021 | — | Active |
| Nibro Estates AB CVR 5568795073 | BoardBoard of Directors | Since 2021 | — | Active |
| Nibro Holding AB CVR 5568981269 | BoardBoard of Directors | Since 2021 | — | Active |
| Nibro Properties AB CVR 5569640807 | BoardBoard of Directors | Since 2021 | — | Active |
| Nibro Residences AB CVR 5590279070 | BoardBoard of Directors | Since 2021 | — | Active |
| 4 Invest AB CVR 5592366982 | BoardBoard of Directors | Since 2021 | — | Active |
| MRB Invest AB CVR 5592900582 | BoardDeputy Board Member | Since 2022 | — | Active |
| Patrik Nilson Invest AB CVR 5592900608 | BoardBoard of Directors | Since 2022 | — | Active |
| PJN Investment AB CVR 5595101287 | BoardBoard of Directors | Since 2025 | — | Active |
| Markum Holding AB CVR 5595145136 | BoardBoard of Directors | Since 2025 | — | Active |
| AquaMont Holding AB CVR 5595351809 | BoardBoard of Directors | Since 2025 | — | Active |
| Markum Entreprenad AB CVR 5595488403 | BoardBoard of Directors | Since 2026 | — | Active |
| FRE Holding AB CVR 5595520395 | BoardBoard of Directors | Since 2026 | — | Active |
| Malmkrossen AB CVR 5595571836 | BoardBoard of Directors | Since 2026 | — | Active |
| 2 Invest Sverige AB CVR 5595631887 | BoardBoard of Directors | Since 2026 | — | Active |
| Markum Management AB CVR 5595721050 | BoardBoard of Directors | Since 2026 | — | Active |
| VVS Montage Västra AB CVR 5595787259 | BoardBoard of Directors | Since 2026 | — | Active |