| Danum Joinery Limited | Construction | 2007 |
| Danum Maintance Limited | Manufacturing | 2024 |
| Danum Model Centre Ltd | Wholesale & retail | 2020 |
| Danum Motor Company Limited | Wholesale & retail | 2001 |
| Danum Motor Solutions Ltd | Wholesale & retail | 2024 |
| Danum News & Off-Licence Ltd | Wholesale & retail | 2018 |
| Danum Plants Holdings Limited | Real estate | 2020 |
| Danum Plants Ltd | Administrative & support | 2018 |
| Danum Plumbing and Heating Limited | Construction | 2017 |
| Danum Powder Coating Ltd | Administrative & support | 2008 |
| Danum Powder Coatings (Yorkshire) Ltd | Manufacturing | 2023 |
| Danum Properties Limited | Real estate | 1998 |
| Danum Resourcing Limited | Extraterritorial | 2017 |
| Danum Services Limited | Water & waste | 2025 |
| Danum Valeting Limited | Wholesale & retail | 2022 |
| Danum Well Services Limited | Mining & quarrying | 1999 |
| Danum Windows Limited | Manufacturing | 1992 |
| Danumhost Ltd | Administrative & support | 2018 |
| Danvm Celebrant Services Ltd | Other services | 2018 |
| Dany Transport Limited | Transport & logistics | 2024 |
| Danysons Ltd | Wholesale & retail | 2018 |
| Danzik Limited | Hospitality | 2022 |
| DAP Beheer Ltd. | Professional & scientific | 2014 |
| DAP Invest Ltd. | Financial services | 2014 |
| Dapatchi Homes Limited | Construction | 2018 |
| Daphdancrafts Limited | Extraterritorial | 2024 |
| Daprotex Ltd | Information & communication | 2021 |
| Daran Food Ltd | Hospitality | 2026 |
| Darfield Motor Controls Ltd | Manufacturing | 2020 |
| Darjeeling Tank Locomotive Ltd | Other services | 2023 |
| Dark Arts Props Ltd | Arts & recreation | 2025 |
| Dark Knight Publishing Ltd | Arts & recreation | 2020 |
| Darkninjatv Ltd | Manufacturing | 2026 |
| Darlington Wire Mills Limited(The) | Professional & scientific | 1946 |
| Darnell Trading Ltd | Extraterritorial | 2026 |
| Darran Jackson Ltd | Financial services | 2012 |
| Darren Hayman Ltd | Arts & recreation | 2003 |
| Darren Jaques NDT and Access Limited | Professional & scientific | 2016 |
| Darren Lynch TM Ltd | Public administration | 2024 |
| Darren Pearson Property Ltd | Real estate | 2026 |
| Darrens Family Butchers Ltd | Wholesale & retail | 2024 |
| Darrington Quarries Limited | Water & waste | 1957 |
| Darts Parts Ltd | Arts & recreation | 2025 |
| Darts, Doncaster Community Arts | Arts & recreation | 1996 |
| Darwin and Sons Ltd | Transport & logistics | 2016 |
| Daryusstefy Ltd | Transport & logistics | 2024 |
| DAS Driver Limited | Transport & logistics | 2015 |
| Dassett Developments Ltd | Real estate | 2005 |
| Dasy Limited | Real estate | 2023 |
| DAT Consultancy Limited | Professional & scientific | 2024 |
| Dataharbour Analytics Ltd | Extraterritorial | 2026 |
| Datel Global Enterprise Ltd | Extraterritorial | 2024 |
| Dateshape (Developments) Limited | Construction | 2023 |
| Dateshape Limited | Construction | 1986 |
| Dave Dave & Dave's Ltd | Real estate | 2022 |
| Dave Evans Drilling Limited | Administrative & support | 2008 |
| Dave Jessop Mechanical Solutions Limited | Construction | 2015 |
| Dave Perry & Sons Ltd | Construction | 2019 |
| Dave Taylor Coal Merchants Limited | Wholesale & retail | 2008 |
| Dave Wales Builders & Plumbers Limited | Construction | 2004 |
| Davey Residential Lettings Ltd | Real estate | 2026 |
| Davfreight Ltd | Transport & logistics | 2024 |
| David & Dani Distribution Ltd | Transport & logistics | 2022 |
| David Bailey Ltd | Public administration | 2017 |
| David Bodman Glass & Glazing Limited | Construction | 2011 |
| David Bowling (Interiors) Limited | Administrative & support | 2009 |
| David Business Ltd | Transport & logistics | 2026 |
| David Cole Building Services Limited | Construction | 2015 |
| David Curran Properties Ltd | Real estate | 2024 |
| David Driving Solutions Ltd | Transport & logistics | 2022 |
| David FOX Design Limited | Professional & scientific | 2009 |
| David Hodgson Consultant Ltd | Professional & scientific | 2017 |
| David Mckendrick Limited | Professional & scientific | 2022 |
| David Transporters Ltd | Transport & logistics | 2017 |
| David Wright Personnel Support Limited | Professional & scientific | 2007 |
| Davie Fine Art Limited | Wholesale & retail | 2003 |
| Davies Business Assistance Ltd | Administrative & support | 2025 |
| Davies Design & Build Ltd | Construction | 2018 |
| Davies European Limited | Transport & logistics | 2019 |
| Davison & Co. Accountants Ltd | Professional & scientific | 2007 |
| Davison & Co. LLP | | 2013 |
| Davison SQI Ltd | Professional & scientific | 2026 |
| Davock Kitchens Ltd | Manufacturing | 2017 |
| Davpol Ltd | Transport & logistics | 2025 |
| DAW to Door Stores Ltd | Wholesale & retail | 2025 |
| DAW Wood Kennels LLP | | 2021 |
| Dawid Plis Lifting Services Ltd | Construction | 2018 |
| Dawline Haulage Limited | Transport & logistics | 2008 |
| Dawn and Co Enterprise Ltd | Arts & recreation | 2020 |
| Dawn Insulation and Rendering Limited | Construction | 2023 |
| Dawn Private Limited | Health & social care | 2014 |
| Dawson & Dearden Construction Limited | Construction | 2011 |
| Dawson Joinery Ltd. | Construction | 2002 |
| Dawson Railways Holdings Limited | Manufacturing | 2012 |
| Day Cafe Ltd | Hospitality | 2018 |
| Day Day Takeaway Ltd | Hospitality | 2023 |
| Day One Creative Studio Limited | Professional & scientific | 2022 |
| Dayal Housing Ltd | Real estate | 2025 |
| Daynik Medical Services Ltd | Health & social care | 2023 |
| Daystar Music Limited | Professional & scientific | 2024 |