| Deals Nest Limited | Wholesale & retail | 2025 |
| Deals Ship Ltd | Wholesale & retail | 2023 |
| Dealsbykal Ltd | Wholesale & retail | 2026 |
| DEALSPLEASE07 Ltd | Wholesale & retail | 2026 |
| Dealz Online Limited | Wholesale & retail | 2021 |
| Dean & Sons Ltd | Wholesale & retail | 2025 |
| Dean Ahmed Management Ltd | Real estate | 2019 |
| Dean Bull Limited | Construction | 2005 |
| Dean Coleman Estates Limited | Real estate | 2019 |
| Dean Investment Properties Ltd | Real estate | 2020 |
| Dean Jones Cues Limited | Manufacturing | 2022 |
| Dean Lake Investments Limited | Administrative & support | 2024 |
| Dean Legal Holdco Limited | Financial services | 2026 |
| Dean Legal Limited | Professional & scientific | 2021 |
| Dean Legal Propco Limited | Real estate | 2026 |
| Dean Lloyd Ltd | Real estate | 2020 |
| Dean Machine Tool Services Ltd | Manufacturing | 2026 |
| Dean Park Estates Limited | Real estate | 2024 |
| Dean Property Development Ltd | Real estate | 2015 |
| Dean PUB Enterprises Ltd | Hospitality | 2014 |
| Dean Walsh Chiropody-Podiatry Ltd | Health & social care | 2002 |
| Deanhgv Ltd | Transport & logistics | 2025 |
| Deanshouse Ltd | Health & social care | 2025 |
| Deansmead Ltd | Real estate | 2019 |
| Deansway Trading Limited | Wholesale & retail | 2025 |
| Dear Nail Limited | Other services | 2022 |
| Dear Wear Ltd | Wholesale & retail | 2022 |
| Deardear Limited | Wholesale & retail | 2020 |
| Dearing Consultancy Ltd | Other services | 2023 |
| Dearson Limited | Manufacturing | 1968 |
| Deasey Lettings Ltd | Real estate | 2025 |
| Deathrow Pizza Limited | Hospitality | 2025 |
| Deathrow Sandwich Limited | Hospitality | 2024 |
| DEB Cuisine Ltd | Hospitality | 2023 |
| Debamenz Limited | Public administration | 2020 |
| Debas Family Ltd | Real estate | 2024 |
| Debate Plus Ltd | Education | 2025 |
| Debbie & Andrew's Limited | Manufacturing | 1997 |
| Deben Management Limited | Professional & scientific | 2017 |
| Debiec Ltd | Transport & logistics | 2013 |
| Debior Limited | Wholesale & retail | 2024 |
| Debit My Mobile Ltd | Information & communication | 2021 |
| Debnik Traders Limited | Wholesale & retail | 2003 |
| Debolonia Construction Ltd | Construction | 2023 |
| Deborah Collection Ltd | Wholesale & retail | 2021 |
| Deborah Lorraine Gordon Ltd | Extraterritorial | 2023 |
| Deborah Services (Holdings) Limited | Manufacturing | 2003 |
| Deborah Ward Limited | Arts & recreation | 2013 |
| Debouch Ltd | Wholesale & retail | 2021 |
| Debrett's Group Limited | Professional & scientific | 2025 |
| Debrett's Private Finance Limited | Professional & scientific | 2021 |
| Debs Drainage Ltd | Administrative & support | 2012 |
| Debt Advice 4 U CIC | Education | 2024 |
| Debt Collection Legal Services Ltd | Administrative & support | 2021 |
| Debt Relief Solutions Community Interest Company | Financial services | 2014 |
| Debt Response Ltd | Professional & scientific | 2025 |
| Debt Solution Services Limited | Real estate | 2017 |
| Debtam Ltd | Health & social care | 2019 |
| Debts Cleared Ltd | Information & communication | 2024 |
| Deburca Services Limited | Construction | 2008 |
| DEC20 Limited | Wholesale & retail | 2023 |
| Decade Monitoring Solutions Limited | Manufacturing | 2013 |
| Decadence Finest Models Limited | Professional & scientific | 2021 |
| Decador Inter Ltd | Professional & scientific | 2024 |
| Decalizard Ltd | Wholesale & retail | 2025 |
| Decanter Spirit Bromsgrove Limited | Wholesale & retail | 2024 |
| Decathon Solutions Limited | Information & communication | 2025 |
| Deccan Engineering Limited | Professional & scientific | 2011 |
| Decent Driving Ltd | Transport & logistics | 2014 |
| Decent Home Maintenance Ltd | Construction | 2021 |
| Decipher Tuning Ltd | Wholesale & retail | 2008 |
| Decjon Ltd | Wholesale & retail | 2021 |
| Deck Wizards Limited | Wholesale & retail | 2025 |
| Deckerdence Ltd | Hospitality | 2015 |
| Deckshare Limited | Extraterritorial | 2008 |
| Declan BS Limited | Wholesale & retail | 2026 |
| Declanmulhernproperties Ltd | Real estate | 2023 |
| Decluttered Minds CIC | Health & social care | 2025 |
| Deco Digital Limited | Arts & recreation | 2014 |
| Decoblanks Limited | Manufacturing | 2021 |
| Decoherence Ltd | Wholesale & retail | 2025 |
| Decon Electrical Systems Limited | Energy | 2015 |
| Decoprime LLP | | 2021 |
| Decor & More Limited | Construction | 2011 |
| Decor 9 Limited | Wholesale & retail | 2025 |
| Decor Delights Ltd | Hospitality | 2026 |
| Decor Mart Limited | Wholesale & retail | 2025 |
| Decor Supplies Showroom Limited | Financial services | 2024 |
| Decorating by PAT Dunne Ltd | Construction | 2010 |
| Decorcina Ltd | Real estate | 2023 |
| Decorcleanwm Limited | Administrative & support | 2014 |
| Decorette Marketing Services Limited | | 1979 |
| Decorsave Ltd. | Wholesale & retail | 2014 |
| Decoskin Decorative Arts Limited | Wholesale & retail | 2011 |
| Decrofloor Limited | Construction | 1991 |
| Decrum Trading Ltd | Wholesale & retail | 2025 |
| Decure Ltd | Wholesale & retail | 2025 |
| Decus Developments Limited | Real estate | 2002 |
| Dedicated Care Partnership Consults Limited | Health & social care | 2026 |
| Dedopi Recruitment Ltd | Other services | 2019 |