| DANSK ALARMAGENTUR ApS CVR 14407049 | ManagementManagement | 1990 – 1992 | — | Opløst |
| WESTERGAARD-NIELSEN MANAGEMENT ApS CVR 14443207 | OtherFounder | 1990 – 1997 | — | Opløst |
| MADONNA WEAR ApS CVR 14862072 | OtherAudit | 1991 – 1992 | — | Opløst |
| SERVICEGRUPPEN ApS CVR 15137770 | ManagementManagement | 1991 – 1994 | — | Opløst |
| BOOKERS & CO/1 A/S CVR 15517107 | BoardBoard of Directors | 1991 – 2006 | — | Opløst |
| BOOKERS & CO/2 ApS CVR 15532246 | OtherFounder | 1991 – 1996 | — | Opløst |
| RENGØRINGSGRUPPEN A/S CVR 15683872 | BoardBoard of Directors | 1991 – 1993 | — | Opløst |
| DANSK ENTREPRISE RENGØRING ApS CVR 15689390 | ManagementManagement | 1991 – 1993 | — | Opløst |
| MEDIA NETWORK A/S CVR 19189775 | BoardBoard of Directors | 1996 – 2002 | — | Opløst |
| NIELSEN INVESTMENT GROUP HOLDING ApS CVR 19409694 | OtherFounder | 1996 – 2000 | — | Opløst |
| TELE-INFO A/S CVR 19640795 | BoardBoard of Directors | 1997 – 2006 | — | Opløst |
| MEDIA NETWORK HOLDING A/S CVR 20098589 | BoardBoard of Directors | 1997 – 2002 | — | Opløst |
| RG GRUPPEN ApS CVR 24869512 | ManagementManagement | 1948 – 1993 | — | Opløst |
| ENTERTAINMENT PARTNER ApS CVR 28109121 | ManagementManagement | 2004 – 2015 | — | Opløst |
| FRYATE HOLDING ApS CVR 29803927 | ManagementManagement | 2006 – 2015 | — | Opløst |
| EJENDOMMEN PRÆSTEKILDE ApS CVR 29804206 | ManagementManagement | 2006 – 2012 | — | Opløst |
| HOTELPARTNER ApS CVR 29804400 | ManagementManagement | 2006 – 2009 | — | Opløst |
| HOTEL PRÆSTEKILDE ADMINISTRATION ApS CVR 30240286 | ManagementManagement | 2007 – 2015 | — | Opløst |
| Ejendomsselskabet Søren Westergaard CVR 10908930 | OtherStakeholder | 1987 – 2026 | — | Aktiv |
| PH MØN ApS CVR 31942780 | ManagementChief Executive Officer | 2009 – 2015 | — | Opløst |
| HOTEL HKV ApS CVR 32937845 | ManagementChief Executive Officer | 2010 – 2011 | — | Opløst |
| FONDEN GEOCENTER MØNS KLINT CVR 27656056 | BoardBoard of Directors | 2010 – 2014 | — | Aktiv |
| VISION PARTNER ApS CVR 87434710 | ManagementManagement | 1996 – 2013 | — | Opløst |
