| Disobedient Learners Ltd | Education | 2025 |
| Dispensing Doctor Experts Ltd | Professional & scientific | 2021 |
| Disruption Worx Ltd | Professional & scientific | 2026 |
| Diss 2025 Limited | Hospitality | 2025 |
| Distinctive Hearts Ltd | Wholesale & retail | 2023 |
| Distinctive Innovation Limited | Information & communication | 2017 |
| Distribution Made Easy Limited | Transport & logistics | 2016 |
| District Products Ltd | Wholesale & retail | 2023 |
| District Trade Flooring Ltd | Construction | 2026 |
| Diti Ltd | Construction | 2024 |
| Divann UK Ltd | Hospitality | 2024 |
| Divcron Services Limited | Health & social care | 2014 |
| Diversey Holdings I (UK) Limited | Financial services | 2021 |
| Diversey Holdings II (UK) Limited | Financial services | 2021 |
| Diversey Limited | Manufacturing | 1997 |
| Diversify International Ltd | Professional & scientific | 2019 |
| Diversiti UK Learning and Development C.I.C. | Education | 2014 |
| Diversiti UK Training Ltd | Hospitality | 2024 |
| Diversity Seven Limited | Wholesale & retail | 2026 |
| Divine Grace Support UK Limited | Health & social care | 2019 |
| Divine Integrated Services Ltd | Wholesale & retail | 2025 |
| Divine Sparkle Ltd | Administrative & support | 2025 |
| Divinetouch Beauty Limited | Other services | 2018 |
| Dixie Luton Ltd | Hospitality | 2023 |
| Dixon Automotive Limited | Wholesale & retail | 1994 |
| DIY Delivery Ltd | Transport & logistics | 2026 |
| DIY Local Northampton Ltd | Wholesale & retail | 2025 |
| Dizzy Ducks Nurseries Community Interest Company | Professional & scientific | 2010 |
| DJ Accountancy & Consultancy Limited | Professional & scientific | 2026 |
| DJ Azeer Events Ltd | Arts & recreation | 2025 |
| DJ Boutique Ltd | Wholesale & retail | 2020 |
| DJ Commercial Lettings Limited | Real estate | 2026 |
| DJ DAS Limited | Transport & logistics | 2019 |
| DJ Lingerie Limited | Wholesale & retail | 2014 |
| DJ Mabbott Holdings Limited | Financial services | 2026 |
| DJ Rory Miller Ltd | Transport & logistics | 2020 |
| DJ Smart Wellbeing Ltd | Education | 2023 |
| DJC Playground Inspections Limited | Public administration | 2020 |
| DJF Lighting Ltd | Construction | 2023 |
| DJG Consulting and Advisory Ltd | Transport & logistics | 2026 |
| DJH Ravcon Ltd | Construction | 2007 |
| DJI - 2 Clare Street Ltd | Construction | 2024 |
| Djipoue Limited | Extraterritorial | 2022 |
| DJK Auto Services Ltd | Wholesale & retail | 2025 |
| DJP Construction Limited | Construction | 2004 |
| DJQ Lettings Limited | Real estate | 2019 |
| DJR Roofing & Management Limited | Construction | 2024 |
| DJR Training Services Ltd | Education | 2015 |
| DJS25PROPERTY Ltd | Construction | 2025 |
| DK 812 (Mallorca) Ltd | Real estate | 2023 |
| DK Plumbing Services Ltd | Construction | 2014 |
| DK Way Sports Ltd | Wholesale & retail | 2022 |
| DK2 Building Services Limited | Construction | 2014 |
| Dkbyrally Ltd | Wholesale & retail | 2026 |
| Dkeot Limited | Financial services | 2024 |
| Dkhr Limited | Information & communication | 2016 |
| Dkneuro Ltd | Health & social care | 2026 |
| DKR Logistics Ltd | Transport & logistics | 2022 |
| Dktrades Ltd | Transport & logistics | 2025 |
| DKW4LOGISTICS Limited | Transport & logistics | 2024 |
| DLA Properties Limited | Real estate | 2020 |
| Dlbuilds Ltd | Wholesale & retail | 2023 |
| DLC Express Freight Limited | Transport & logistics | 1999 |
| DLE Property Investments Limited | Real estate | 2025 |
| DLG Communications Limited | Information & communication | 2011 |
| Dlifesurge Ltd | Real estate | 2023 |
| Dlish Foods Ltd | Hospitality | 2025 |
| Dlive Productions Limited | Manufacturing | 2021 |
| DLT Project Management Services Limited | Professional & scientific | 2011 |
| DLT Property Holdings Ltd | Real estate | 2026 |
| DM Brickwork Contractors Limited | Construction | 2017 |
| DM Emergency Plumbing Ltd | Construction | 2019 |
| DM Mastics Ltd | Administrative & support | 2020 |
| DM Property Enterprises Ltd | Real estate | 2026 |
| DMA Enterprise Limited | Health & social care | 2022 |
| Dmagar Ltd | Wholesale & retail | 2025 |
| DMB Engineering Consultants Ltd | Information & communication | 2016 |
| Dmbd Limited | Real estate | 2019 |
| Dmbr Limited | Construction | 2015 |
| DMC Encore (Northampton) Limited | Manufacturing | 2020 |
| DMC Equipment Limited | Extraterritorial | 1985 |
| DMD Builders Ltd | Construction | 2019 |
| DMD Construct Ltd | Construction | 2023 |
| DME Wellbeing Ltd | Wholesale & retail | 2024 |
| DMG Scaffolding Ltd | Construction | 2025 |
| DMH Roofing Ltd | Construction | 2021 |
| DMI Holdings Ltd | Real estate | 2025 |
| DMK Skin Co Ltd | Administrative & support | 2014 |
| Dmmm Brickwork Ltd | Construction | 2025 |
| Dmrc Global Ltd | Information & communication | 2025 |
| Dmrjolley Ltd | Construction | 2022 |
| DMS Decorating Ltd | Construction | 2019 |
| DMS Flooring Supplies Limited | Extraterritorial | 2015 |
| Dmsfieldcall Limited | Administrative & support | 1959 |
| Dmsl UK Ltd | Information & communication | 2024 |
| DMT Estates Ltd | Households | 2025 |
| DMT Software Limited | Information & communication | 2006 |
| DMV Construction Ltd | Construction | 2020 |
| Dmzconstruct Ltd | Construction | 2024 |
| DN Legal Solutions Limited | Professional & scientific | 2025 |