| Demuren Limited | London | 2008 |
| DEN Contracts (NW) Limited | Chorley | 2014 |
| DEN Norske Nominees Limited | London | 1971 |
| DEN Rullande Greken Invest Limited | London | 2022 |
| DEN Rullande Greken Limited | London | 2022 |
| Denada Consulting Limited | Glasgow | 2005 |
| Denband Limited | Borehamwood | 2020 |
| Denbar Limited | Mansfield | 2013 |
| Denbigh Investments (54) Limited | Burgh Heath | 1997 |
| Denby Warehouse Limited | Lincolnshire | 1970 |
| Denchi EOT Limited | Cambridge | 2024 |
| Dencrown Limited | Reading Berkshire | 1995 |
| Dendrow Limited | Woodford Green | 2011 |
| Dene Corporation Limited | Harrogate | 1991 |
| Dene Cottage Limited | Newdigate | 1996 |
| Dene Jesmond Music Limited | London | 2023 |
| Dene Jesmond Records Limited | London | 2019 |
| Dene Park Investments Limited | Newcastle Upon Tyne | 2024 |
| Deneland Ltd | Deal | 2026 |
| Denerco (UK) Limited | Newton Aycliffe | 2015 |
| Deneview Properties Limited | London | 1996 |
| Denford Park Holding Company Limited | Newbury | 2017 |
| Denhen Limited | | 2006 |
| Denholm Access Limited | London | 2024 |
| Denholm Engineering Limited | Glasgow | 2011 |
| Denholm Group Limited | London | 1987 |
| Denholm Macnamee Limited | Glasgow | 2021 |
| Denholm Marine Limited | Yeovil | 2024 |
| Denholm Marine Services Limited | Yeovil | 2024 |
| Denholm Power Limited | London | 2024 |
| Denholm Renewables Limited | London | 2024 |
| Denholm Specialist Access Limited | London | 2024 |
| Denim and Bone Ltd | Sevenoaks | 2020 |
| Denim Hub Limited | Manchester | 2015 |
| Denis Sport MGT Ltd | Harlow | 2021 |
| Denise KAY Christie Ltd | London | 2023 |
| Denise Patricia Davis Ltd | Ampthill | 2023 |
| Denise Ruth Thomas Ltd | London | 2024 |
| Denison Consulting (UK) Limited | Newcastle Upon Tyne | 2010 |
| Denitz Investments Limited | Liverpool | 1999 |
| Denizci Ltd | London | 2023 |
| Denizkizi Yacht Agency Ltd | London | 2024 |
| Denmaker Ltd | Bristol | 2014 |
| Denman House Holdings Limited | Wakefield | 2006 |
| Denmark Street London Limited | London | 2011 |
| Denmore Industrial NO 1 Limited | Manchester | 2013 |
| DENN1S Limited | Harrogate | 2020 |
| Denne Construction Limited | London | 1991 |
| Denne Group Limited | London | 1972 |
| Denne Road Management Company Limited | Croydon | 2005 |
| Dennicci Ltd | Maldon | 2021 |
| Dennis Common Ltd | Ashington | 2018 |
| Dennis Denny Investments Ltd | Ipswich | 2017 |
| Dennis Tech HK Limited | Beckenham | 2014 |
| Dennis-Raymond Thomas Ltd | Harlow | 2024 |
| Denny Tools Limited | Surrey | 1976 |
| Denor Industries Co., Ltd. | Kenilworth | 2015 |
| Denovo Health Group Services Limited | Manchester | 2024 |
| Denovo Midco 1 Limited | Manchester | 2024 |
| Denovo Midco 2 Limited | Manchester | 2024 |
| Denovo Nominees Limited | Manchester | 2024 |
| Denroy Plastics Limited | | 1977 |
| Densit Limited | Worcestershire | 1997 |
| Densit Manufactured Products Limited | Worcestershire | 1995 |
| Dent Quote Ltd | Peterborough | 2016 |
| Dent WIZ P.D.R Limited | Atherstone | 2018 |
| Denta Consult GmbH Limited | Kenilworth | 2006 |
| Dentaid Laboratories Limited | Weybridge | 2012 |
| Dentait Ltd | London | 2024 |
| Dental Business Accountants Limited | London | 2006 |
| Dental Defence Union Limited | London | 1990 |
| Dental Insurance Agency Limited | Yeovil | 2001 |
| Dental Ledger Limited | Langley | 2002 |
| Dental Supply Chain Limited | Braintree | 2013 |
| Dental Support Services Limited | London | 1998 |
| Dental Trade Network Limited | Braintree | 2013 |
| Dental Wealth Builder Limited | Pinner | 2014 |
| Dentalcare Partnership Limited | Wilmslow | 2008 |
| Dentalcare Reading Ltd | Wilmslow | 2022 |
| Dentalcare Swindon Central Limited | Wilmslow | 2019 |
| Dentanol Ltd | Falmouth | 2017 |
| Dentasay Ltd | London | 2022 |
| Dentastique Limited | Cambridge | 2011 |
| Dentecom Limited | Newcastle Upon Tyne | 2000 |
| Dentique Imaging Limited | Leicester | 2010 |
| Denton & Nickels Limited | Doncaster | 2019 |
| Denton Cooke Limited | Macclesfield | 2022 |
| Denton Park Ltd | Leeds | 2005 |
| Denton Place Management Company Limited | Berkshire | 2007 |
| Denton Tyre Centre Limited | Winchester | 1998 |
| Denton Wilde Sapte Limited | London | 2010 |
| Dentrite Limited | Holywell | 2006 |
| Dents Limited | Warminster | 1962 |
| Denver Interiors Limited | Bolton | 2015 |
| Denver Trading Limited | Armagh | 2001 |
| Denwal Press Ltd | Maidenhead | 2006 |
| Denworth Limited | Barry | 1989 |
| Denzilcare Limited | Welwyn Garden City | 1983 |
| Denzilla Limited | Bury St Edmunds | 2023 |
| Depantha of Sweden Invest Limited | London | 2019 |