| Digital Path Accounting Limited | Professional & scientific | 2022 |
| Digitally Accountants Ltd | Professional & scientific | 2010 |
| DIL Assets Limited | Professional & scientific | 2018 |
| DIL Services Limited | Professional & scientific | 2018 |
| Dilraj Limited Company Ltd | Hospitality | 2019 |
| Dinova Ltd | Administrative & support | 2023 |
| Direct Adhesives Limited | Manufacturing | 1996 |
| Direct International Logistics Limited | Information & communication | 2005 |
| Directus Group Europe Limited | Professional & scientific | 2015 |
| Disraeli Court (High Wycombe) Management Company Limited | Households | 2003 |
| District 13 Ltd. | Information & communication | 2015 |
| Dive Compare Ltd | Wholesale & retail | 2025 |
| Diverse Flooring Ltd | Construction | 2012 |
| Diverse Property Design Ltd | Construction | 2024 |
| Dj&Co Services Ltd | Construction | 2026 |
| DJK Water Solutions Ltd | Agriculture & fishing | 2024 |
| DJN London Limited | Real estate | 2025 |
| DJP Professional Solutions Ltd | Education | 2023 |
| DK Campbell Investments Limited | Real estate | 2026 |
| DLA Auto Ltd | Wholesale & retail | 2018 |
| Dlar Investments Ltd | Financial services | 2025 |
| DLC Aviation Limited | Professional & scientific | 2024 |
| DLS Carpentry Limited | Manufacturing | 2015 |
| DM Premier Roofing & Building Services Ltd | Construction | 2025 |
| Dmbm LDN Ltd | Construction | 2014 |
| DMC Facilities Management Limited | Administrative & support | 2009 |
| DME Autoparts Ltd | Wholesale & retail | 2018 |
| DMS (Bucks) Limited | Water & waste | 2014 |
| DNA Cleaning Solutions Limited | Other services | 2008 |
| Docworks Limited | Information & communication | 2004 |
| Doherty Recycling Ltd | Water & waste | 2019 |
| Doherty Tippers Ltd | Transport & logistics | 2017 |
| Dolittle Grooming Limited | Professional & scientific | 2022 |
| Dolly’S Dog Grooming Ltd | Other services | 2025 |
| Dolphin House Management Limited | Real estate | 2003 |
| Domestic Designs Ltd | Professional & scientific | 2006 |
| Domvs Build Ltd | Construction | 2017 |
| Dooley Limited | Construction | 2003 |
| Doox & Moom Limited | Wholesale & retail | 2023 |
| Dorada App Software Ltd | Information & communication | 2012 |
| Dore Hospitality Ltd | Hospitality | 2026 |
| Dorridge View Residents Management Company Limited | Households | 2015 |
| Dorvics Cycles Limited | Wholesale & retail | 2018 |
| Dotdotdot Ltd | Information & communication | 1995 |
| Dougal Debug Limited | Information & communication | 2022 |
| Downs Engraving Limited | Manufacturing | 2000 |
| DP Installs & Maintenance Ltd | Construction | 2026 |
| DP Software Ltd | Information & communication | 2017 |
| DPV Mobile Mechanic Limited | Wholesale & retail | 2014 |
| Dragon Appliances Limited | Other services | 2018 |
| Dragon Products Limited | Administrative & support | 2015 |
| Dragonspear Limited | Financial services | 2010 |
| Draw Nation Limited | Wholesale & retail | 2023 |
| DRB Tech Solutions Limited | Information & communication | 2026 |
| Dream Green Design Ltd | Wholesale & retail | 2008 |
| Drexor Limited | Wholesale & retail | 2017 |
| Drive WIT Care Limited | Transport & logistics | 2022 |
| Dropro Investments Limited | Real estate | 2024 |
| Drylife Limited | Other services | 1987 |
| DS & CB Consulting Limited | Professional & scientific | 2021 |
| DS Direct Transport Ltd | Transport & logistics | 2023 |
| DSG Electrical Service Ltd | Construction | 2024 |
| DSW Enterprises Ltd | Construction | 2018 |
| DSW Painting & Decorating Ltd. | Other services | 2015 |
| Dtmk Limited | Education | 2024 |
| Duchy Holdings Limited | Real estate | 2021 |
| Duckies' Holdings Limited | Health & social care | 2025 |
| Ducks Away Ltd | Professional & scientific | 2025 |
| Duct Engineering (Luton) Limited | Manufacturing | 1973 |
| Dukeminster Road Block 6 Freehold Limited | Households | 2024 |
| Dumbfost Limited | Financial services | 2023 |
| Dunaff Drylining Limited | Construction | 2015 |
| Dundas Driving Ltd | Administrative & support | 2017 |
| Dunstan Group Holdings Limited | Real estate | 1991 |
| Durrance Farm Business Park Limited | Real estate | 2019 |
| Dust AUTH4RITY Ltd | Construction | 2023 |
| DW Cattery Ltd | Other services | 2025 |
| DXM Capital Limited | Real estate | 2025 |
| Dynamic R Ltd | Construction | 2023 |
| Dynamicsbc Consultancy Limited | Information & communication | 2024 |
| Dynamix Collective Ltd | Professional & scientific | 2026 |
| Dynasty Mews Management Company Limited | Households | 2021 |
| DZL Construction Limited | Extraterritorial | 2019 |
| E and E Services MK Limited | Wholesale & retail | 2008 |
| E Carrillo Limited | Financial services | 2016 |
| E W Servicing Limited | Manufacturing | 2025 |
| E&S Property Investment Ltd | Real estate | 2024 |
| Eaarth Ltd | Information & communication | 2023 |
| Eagle Business Consulting Ltd | Wholesale & retail | 2021 |
| Eagle Pizza LB Ltd | Hospitality | 2022 |
| Eagles Wings | Health & social care | 2004 |
| Eagletai Ltd | Wholesale & retail | 2023 |
| Earleswood Property Limited | Households | 2004 |
| Easenet Limited | Information & communication | 2022 |
| East Health Collective Limited | Information & communication | 2026 |
| East Vale Limited | Professional & scientific | 2026 |
| Easy 3 Property Options ( E3 POP) Limited | Real estate | 2018 |
| EAT Words Limited | Professional & scientific | 2022 |
| Eaton Coffee Ltd | Hospitality | 2016 |
| Eaton Gate (ST Neots) Management Company Limited | Households | 2016 |