| EFSEN TEKNIK ApS CVR 10206707 | ManagementManagement | 1986 – 2016 | — | Dissolved |
| AKTIESELSKABET SORENCO CVR 12246919 | BoardBoard of Directors | 1963 – 1992 | — | Dissolved |
| SORENCO CNC A/S CVR 12537409 | BoardBoard of Directors | 2002 – 2002 | — | Dissolved |
| W & W ApS CVR 12691645 | ManagementManagement | 1989 – 1992 | — | Dissolved |
| SORENCO TRADING ApS CVR 19680797 | BoardBoard of Directors | 2002 – 2002 | — | Dissolved |
| SORENCO A/S CVR 19681270 | BoardBoard of Directors | 2002 – 2002 | — | Dissolved |
| SORENCO INTERNATIONAL ApS CVR 19681300 | BoardBoard of Directors | 2002 – 2002 | — | Dissolved |
| SORENCO MACHINERY ApS CVR 19681335 | BoardBoard of Directors | 2002 – 2002 | — | Dissolved |
| SORENCO ENGINEERING ApS CVR 19681343 | BoardBoard of Directors | 2002 – 2002 | — | Dissolved |
| EFSEN LEASING ApS CVR 33498942 | ManagementManagement | 2011 – 2013 | — | Dissolved |
| Efsen Teknik 3 ApS CVR 37528803 | BoardChairman | 2016 – 2017 | — | Dissolved |
| Salamanderhusene A/S CVR 40455140 | BoardBoard of Directors | 2020 – 2022 | — | Dissolved |
| EFSEN UVC Technology A/S CVR 42433217 | BoardBoard of Directors | 2021 – 2023 | — | Dissolved |
| TEF HOLDING ApS CVR 32056288 | ManagementManagement | 2009 – 2009 | — | Active |
| A. M. HOLDING A/S CVR 51637410 | BoardBoard of Directors | 1975 – 1991 | — | Dissolved |
| Draupnir Invest I P/S CVR 40629130 | BoardBoard of Directors | 2019 – 2025 | — | Active |
| SKELSTEDET 6 ApS CVR 34470928 | ManagementChief Executive Officer | 2012 – 2018 | — | Active |
