| UNDHEIM BIOGASS AS CVR 936590462 | BoardChairman | Since 2025 | — | Active |
| P UNDHEIM HOLDING AS CVR 936590497 | BoardChairman | Since 2025 | — | Active |
| JÆR TRE AS CVR 917118167 | BoardChairman | Since 2025 | — | Active |
| P UNDHEIM BOLIG AS CVR 929555635 | BoardChairman | Since 2022 | — | Active |
| PREBEN AS CVR 926312707 | ManagementChief Executive Officer | Since 2020 | — | Active |
| BRUAVEGEN EIENDOM AS CVR 913255666 | BoardChairman | Since 2022 | — | Active |
| UPK EIENDOM AS CVR 917798710 | BoardChairman | Since 2016 | — | Active |
| ELEMENTEN AS CVR 925033626 | BoardChairman | Since 2020 | — | Active |
| WEATHERLANDS AS CVR 925037737 | BoardChairman | Since 2020 | — | Active |
| PREBEN UNDHEIM CVR 970360603 | OwnerOwner | Since 1995 | — | Active |
| P UNDHEIM AS CVR 984079834 | BoardChairman | Since 2025 | — | Active |
| SAMEIET BRUAVEGEN ELVEPARK CVR 923686533 | BoardChairman | Since 2020 | — | Active |
| SVERTINGSTAD BOLIGUTVIKLING AS CVR 917153159 | BoardChairman | Since 2017 | — | Active |
| WEATHERLANDS DATACENTER AS CVR 936994962 | BoardChairman | Since 2026 | — | Active |
| MARVIKSJØEN SAMEIE CVR 917627541 | BoardChairman | Since 2026 | — | Active |
