| DELTA INNOVATION AS CVR 916257473 | BoardChairman | Since 2015 | — | Active |
| DELTA GREEN ENERGY AS CVR 925342947 | BoardChairman | Since 2022 | — | Active |
| DELTA GREEN SOLUTIONS AS CVR 931017756 | ManagementChief Executive Officer | Since 2023 | — | Active |
| DELTA ENERGY SERVICES AS CVR 950562013 | ManagementChief Executive Officer | Since 2003 | — | Active |
| DELTA CONTRACTING AS CVR 967365629 | ManagementChief Executive Officer | Since 2017 | — | Active |
| DELTA GROUP AS CVR 976849655 | ManagementChief Executive Officer | Since 2009 | — | Active |
| DELTA TECHNOLOGY UK LTD CVR 984254717 | ManagementChief Executive Officer | Since 2010 | — | Active |
| DELTA ENERGY GROUP AS CVR 936784208 | BoardChairman | Since 2025 | — | Active |
