| Drammen Easylife Senter AS | Arts & recreation | 2010 |
| Drammen Eiendom Og Utleie AS | Real estate | 2020 |
| Drammen Eiendomsdrift AS | Administrative & support | 2015 |
| Drammen Eiendomsmegling AS | Real estate | 2018 |
| Drammen Eiendomsutvikling AS | Real estate | 2004 |
| Drammen Electronics AS | Professional & scientific | 2024 |
| Drammen Elektro AS | Construction | 2023 |
| Drammen Emballasje AS | Manufacturing | 1992 |
| Drammen Fasadevask AS | Administrative & support | 2005 |
| Drammen Felg Service AS | Other services | 1986 |
| Drammen Fjernvarme AS | Energy | 1998 |
| Drammen Forsikring AS | Financial services | 2016 |
| Drammen Fothelsesenter AS | Health & social care | 1991 |
| Drammen Fysioterapi AS | Health & social care | 1974 |
| Drammen GK Café AS | Hospitality | 2026 |
| Drammen Glass - Integrerte Dagslyskontroll Systemer AS | Wholesale & retail | 2014 |
| Drammen Glass AS | Wholesale & retail | 2002 |
| Drammen Halal Kjøtt AS | Wholesale & retail | 2026 |
| Drammen Handelscompagnie AS | | 2025 |
| Drammen Handverk Og Service AS | Construction | 2024 |
| Drammen Havn AS | Transport & logistics | 2023 |
| Drammen Helse AS | Health & social care | 2018 |
| Drammen Helsekost AS | Wholesale & retail | 2017 |
| Drammen Helsepark AS | Real estate | 2017 |
| Drammen Hjertesenter AS | Health & social care | 2015 |
| Drammen Holding AS | | 2025 |
| Drammen Hotelldrift AS | Hospitality | 2021 |
| Drammen Hudlegekontor AS | Health & social care | 2001 |
| Drammen Hudlegesenter AS | Health & social care | 2015 |
| Drammen Håndverkservice Da | Wholesale & retail | 1998 |
| Drammen Industriservice AS | Manufacturing | 2019 |
| Drammen Interiørpark AS | Real estate | 2007 |
| Drammen Interiørsnekkeri AS | Construction | 2022 |
| Drammen Invest AS | Wholesale & retail | 2020 |
| Drammen Isolering Og Blikk AS | Construction | 2006 |
| Drammen Kalkulasjon Ans | Professional & scientific | 2000 |
| Drammen Kampsportsenter AS | Real estate | 2014 |
| Drammen Keramikkverksted AS | Education | 2022 |
| Drammen Kino AS | Information & communication | 1999 |
| Drammen Kirurgi AS | Health & social care | 2019 |
| Drammen Klatresenter AS | Arts & recreation | 2015 |
| Drammen Kontoreiendom AS | Real estate | 2021 |
| Drammen Krystall AS | Wholesale & retail | 2017 |
| Drammen Kulturhus AS | Arts & recreation | 2022 |
| Drammen Legesenter Da | Health & social care | 2011 |
| Drammen Liftutleie AS | Administrative & support | 2006 |
| Drammen LIVE24 AS | Information & communication | 2015 |
| Drammen Logistikk AS | Transport & logistics | 2026 |
| Drammen Logistikkinvest AS | Real estate | 2016 |
| Drammen Logopedtjeneste AS | Health & social care | 2016 |
| Drammen Malerservice AS | Construction | 2015 |
| Drammen Medisinske Senter AS | Health & social care | 2026 |
| Drammen Mesterbygg AS | Construction | 2005 |
| Drammen Motorcenter AS | Wholesale & retail | 2014 |
| Drammen Mur & Flis AS | Construction | 2021 |
| Drammen Møbler AS | Wholesale & retail | 2015 |
| Drammen Nevroklinikk Partners AS | Health & social care | 2020 |
| Drammen Nevropsykologi AS | Health & social care | 2017 |
| Drammen Næringseiendom AS | Real estate | 2004 |
| Drammen Næringsparker AS | Real estate | 2010 |
| Drammen Offshore Holding AS | Manufacturing | 2012 |
| Drammen Og Lier Eiendomsmegling AS | Real estate | 2023 |
| Drammen Osteopati AS | Health & social care | 2016 |
| Drammen Padel AS | Real estate | 2018 |
| Drammen Padel Avd Tangen AS | Arts & recreation | 2025 |
| Drammen Panorama AS | Real estate | 2022 |
| Drammen Papir Engros AS | Wholesale & retail | 1988 |
| Drammen Pizza & Grill AS | Hospitality | 2015 |
| Drammen Racing Senter AS | Arts & recreation | 2015 |
| Drammen Regnskap AS | Professional & scientific | 2020 |
| Drammen Rehabilitering AS | Construction | 2002 |
| Drammen Renhold AS | Administrative & support | 2023 |
| Drammen Renovering AS | Real estate | 2025 |
| Drammen Restaurantdrift AS | Hospitality | 2015 |
| Drammen Revisjon AS | Professional & scientific | 2007 |
| Drammen Rørleggerbedrift AS | Construction | 2019 |
| Drammen Rørservice AS | Construction | 2026 |
| Drammen Scener AS | Arts & recreation | 2009 |
| Drammen Shipping AS | Transport & logistics | 2012 |
| Drammen Skisenter AS | Arts & recreation | 1994 |
| Drammen Skredderi AS | Manufacturing | 2022 |
| Drammen Skutebrygge AS | Hospitality | 2012 |
| Drammen Slip & Verksted AS | Manufacturing | 1967 |
| Drammen Sportsklinikk AS | Health & social care | 2006 |
| Drammen Street Bites AS | Hospitality | 2025 |
| Drammen Strekktak AS | Professional & scientific | 2014 |
| Drammen Sveiseservice AS | Manufacturing | 2016 |
| Drammen Takst & Eiendom AS | Real estate | 2026 |
| Drammen Takstsenter AS | Real estate | 2006 |
| Drammen Tannlegesenter AS | Health & social care | 2014 |
| Drammen Tannregulering AS | Health & social care | 2018 |
| Drammen Taxi SA | Transport & logistics | 1992 |
| Drammen Transport & Samlast AS | Transport & logistics | 2015 |
| Drammen Trappevask AS | Administrative & support | 2016 |
| Drammen Truckservice AS | Wholesale & retail | 2007 |
| Drammen Vaktmesterkompani AS | Administrative & support | 2019 |
| Drammen Vann Og Avløp AS | Construction | 2023 |
| Drammen Vann Og Varme AS | Construction | 2024 |
| Drammen Viken Verksted AS | | 2025 |
| Drammen Våtrom AS | Construction | 2023 |