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