| DL Tiling Ltd | Construction | 2010 |
| DLA (EOT) Limited | Financial services | 2025 |
| DLA Architecture Limited | Professional & scientific | 1983 |
| DLA Design Group of Companies Limited | Financial services | 1998 |
| DLA Employee Benefit Trust Company Limited | Administrative & support | 1999 |
| DLA Freeman White Healthcare Architecture Limited | Extraterritorial | 2003 |
| DLA Graphics Limited | Extraterritorial | 2000 |
| DLA Group Holdings Limited | Financial services | 2021 |
| DLA Holdings Limited | Extraterritorial | 2003 |
| DLA Interiors Limited | Extraterritorial | 2000 |
| DLA Landscape and Urban Design Limited | Extraterritorial | 2000 |
| DLA Project Services Limited | Extraterritorial | 2000 |
| DLE Design Limited | Construction | 2004 |
| Dle-Com Ltd | Manufacturing | 2012 |
| DLE130215 Ltd | Administrative & support | 2020 |
| Dleading Creative Designs Ltd | Professional & scientific | 2024 |
| DLF Property Services Ltd | Hospitality | 2025 |
| DLG Architects LLP | | 2009 |
| DLG Legal Services Limited | Professional & scientific | 2012 |
| DLG Property Leases Limited | Extraterritorial | 2006 |
| DLR Produce Limited | Wholesale & retail | 2022 |
| DLR Property Solutions Limited | Real estate | 2023 |
| DLR Web Solutions Limited | Information & communication | 2019 |
| DLS Recruitment Ltd | Professional & scientific | 2025 |
| DM Control and Automation Limited | Professional & scientific | 2022 |
| DM Property Services & Renovations Ltd | Construction | 2019 |
| DM Technical Services Limited | Professional & scientific | 2005 |
| DM Textiles Limited | Manufacturing | 2018 |
| DM Tiling Installations Ltd | Other services | 2019 |
| DM2014 Limited | Professional & scientific | 2014 |
| DM7 Football Academy Limited | Arts & recreation | 2022 |
| DMA Holdings Limited | Manufacturing | 2016 |
| DMB Building (Bradford) Ltd | Construction | 2026 |
| DMB Property Investors Ltd | Real estate | 2021 |
| DMC Brewery Ltd | Manufacturing | 2020 |
| Dmcb Holdings Limited | Financial services | 2019 |
| DMD International Limited | Manufacturing | 2026 |
| DMD Properties (Elland) Ltd | Administrative & support | 2002 |
| DMD Protecht Limited | Administrative & support | 2014 |
| Dmdobrev Ltd | Professional & scientific | 2024 |
| DMF (Leeds) Limited | Construction | 2021 |
| DML Civil Engineering Ltd | Construction | 2021 |
| DML Electrical Ltd | Construction | 2026 |
| DMO Building Services Ltd | Construction | 2024 |
| DMO Consultancy & Accounting Services Ltd | Professional & scientific | 2008 |
| DMR Investment Group Limited | Real estate | 2019 |
| DMR Leading Group Ltd | Professional & scientific | 2022 |
| DMR Property Management Limited | Real estate | 2021 |
| Dmre Ltd | Professional & scientific | 2025 |
| Dmrs Associates Limited | Information & communication | 2020 |
| DMS Electrical Contractors Limited | Construction | 2004 |
| DMS Supplies Ltd | Wholesale & retail | 2020 |
| DMT Courier and Services Ltd | Transport & logistics | 2024 |
| DMT Ltd | Transport & logistics | 2018 |
| DMT Motors Ltd | Wholesale & retail | 2017 |
| DMT Property Maintenance Ltd | Construction | 2020 |
| DMW Electrical Services (Leeds) Ltd | Construction | 2019 |
| Dmwy Limited | Wholesale & retail | 2017 |
| DN Agencies Ltd | Wholesale & retail | 2021 |
| Dn&Mt Limited | Transport & logistics | 2016 |
| DNA Marketing Agency Ltd | Professional & scientific | 2025 |
| DNA Property Group Ltd | Construction | 2025 |
| Dnaco Limited | Professional & scientific | 2018 |
| DNB Wholesale Ltd | Wholesale & retail | 2023 |
| Dnev Ltd | Wholesale & retail | 2025 |
| DNF SAP Ltd | Information & communication | 2019 |
| Dnjc Ltd | Real estate | 2025 |
| DNL5K Properties Ltd | Real estate | 2025 |
| DNO North Sea (Rogb) Limited | Mining & quarrying | 1984 |
| DNO North Sea (U.K.) Limited | Mining & quarrying | 2003 |
| DNO North Sea Limited | Mining & quarrying | 2002 |
| DNO UK Limited | Mining & quarrying | 2005 |
| DNP Commercial Limited | Real estate | 2025 |
| Dnrw Unlimited | Financial services | 2022 |
| DNS Enterprise Ltd | Wholesale & retail | 2024 |
| DNS Infra Ltd | Real estate | 2022 |
| DNS Stones Limited | Construction | 2008 |
| DNS Technology Ltd | Wholesale & retail | 2022 |
| DO Cleaning Limited | Professional & scientific | 2019 |
| DO Less Work, Earn More Money Ltd | Administrative & support | 2010 |
| DO More Than Exist Ltd | Administrative & support | 2017 |
| Dobson Bruce Ltd | Financial services | 2015 |
| Dobson Building Contractors Ltd | Construction | 2020 |
| Dobsons Joiners & Building Services Ltd | Construction | 2023 |
| DOC Abode Ltd. | Information & communication | 2016 |
| DOC2DISK Limited | Information & communication | 2003 |
| Docfit Ltd | Arts & recreation | 2025 |
| Dock Street Freehold Limited | Households | 2005 |
| Dock Street Management Limited | Households | 2006 |
| Docrashop Ltd | Wholesale & retail | 2021 |
| Docsandducks Limited | Health & social care | 2022 |
| Doctor Chai Limited | Hospitality | 2021 |
| Doctor Louise Functional Medicine Ltd | Health & social care | 2025 |
| Doctor Rachel Ltd | Health & social care | 2013 |
| Doctor YOU Limited | Extraterritorial | 2009 |
| Doctoria Ltd | Information & communication | 2021 |
| Doctri Ltd | Education | 2025 |
| Document Shredder Rentals Limited | Administrative & support | 2011 |
| DOD HQ Ltd | Administrative & support | 2025 |
| DOD Property (Yorkshire) Ltd | Real estate | 2026 |