| LAWSON SOFTWARE RESEARCH AND DEVELOPMENT A/S CVR 12070330 | BoardBoard of Directors | 1988 – 1997 | — | Dissolved |
| PHM HOLDING ApS CVR 12478445 | OtherFounder | 1988 – 1999 | — | Dissolved |
| IBM BUSINESS CONSULTING SERVICES A/S CVR 12824491 | BoardBoard of Directors | 1999 – 2002 | — | Dissolved |
| ABACO ApS CVR 13183104 | BoardBoard of Directors | 1989 – 1991 | — | Dissolved |
| CAP INVEST A/S CVR 13814694 | BoardBoard of Directors | 1990 – 1990 | — | Dissolved |
| HERRMANN & FISCHER HOLDING A/S CVR 13824908 | BoardBoard of Directors | 1989 – 1994 | — | Dissolved |
| BOLVAS A/S CVR 14534857 | BoardBoard of Directors | 1966 – 1991 | — | Dissolved |
| PETER MATTHIESEN HOLDING ApS CVR 15268999 | OtherFounder | 1991 – 2008 | — | Dissolved |
| MATTHIESEN & KESSEL ApS CVR 15805692 | OtherFounder | 1991 – 1997 | — | Dissolved |
| GLINT INTERNATIONAL ApS CVR 17667300 | BoardBoard of Directors | 1985 – 1992 | — | Dissolved |
| FOCUS HOLDING ApS CVR 15380586 | BoardBoard of Directors | 1996 – 1997 | — | Active |
| PERSPECTIVES LEDELSESRÅDGIVNING A/S CVR 26010519 | BoardBoard of Directors | 2001 – 2002 | — | Dissolved |
| MATTHIESEN MANAGEMENT ApS CVR 26610311 | OtherFounder | 2002 – 2020 | — | Dissolved |
| IDCD ApS CVR 28145675 | BoardBoard of Directors | 2006 – 2007 | — | Dissolved |
| ADVANTAGE MEDIA ApS CVR 30005546 | BoardChairman | 2006 – 2008 | — | Dissolved |
| PEVASTER A/S CVR 30073665 | BoardBoard of Directors | 2006 – 2012 | — | Dissolved |
| SCOPTI A/S CVR 33051727 | BoardBoard of Directors | 2010 – 2014 | — | Dissolved |
| A/S DANSK KONTORMARKED CVR 41808411 | BoardBoard of Directors | 1968 – 1990 | — | Dissolved |
| HERRMANN & FISCHER A/S CVR 73599814 | BoardBoard of Directors | 1984 – 1994 | — | Dissolved |
| CHAT BOARD A/S CVR 15806230 | BoardBoard of Directors | 1996 – 1997 | — | Active |
