| Divitiae Properties Ltd | Real estate | 2026 |
| Dixel Services Limited | Construction | 2008 |
| Dixon Foods Limited | Hospitality | 2013 |
| Dixon Marine Consulting Limited | Administrative & support | 1997 |
| Dixon Property Co Ltd | Real estate | 2016 |
| Dizzy New Heights Limited | Other services | 2022 |
| DJ & HL Enterprise Ltd | Real estate | 2024 |
| DJ & HL Service Centre Ltd | Wholesale & retail | 2025 |
| DJ Claxton Holdings Ltd | Financial services | 2022 |
| DJ Consultancy Norfolk Ltd | Administrative & support | 2025 |
| DJ Enterprises Norfolk Ltd | Administrative & support | 2025 |
| DJ Paper Ltd | Wholesale & retail | 2006 |
| DJC Invincible Holdings Ltd | Real estate | 2018 |
| DJC Studios Limited | Professional & scientific | 2010 |
| DJF Visioncontrol Ltd | Information & communication | 2025 |
| DJG Investments Ltd | Real estate | 2016 |
| DJH Composer Ltd | Information & communication | 2017 |
| Djohnston Consultancy Ltd | Health & social care | 2019 |
| DJS Accounting Services Limited | Professional & scientific | 2021 |
| DJS Plastering Ltd | Construction | 2025 |
| DK Dynamics Ltd | Professional & scientific | 2012 |
| DK Electrical (Norfolk) Ltd | Construction | 2023 |
| DK Interior Contracts Ltd | Construction | 2005 |
| Dkbecom Ltd | Wholesale & retail | 2022 |
| DKC Plumbing Ltd | Construction | 2023 |
| DKL Advisor Services Ltd | Financial services | 2020 |
| DKM Finance Limited | Professional & scientific | 2015 |
| DKS Motors Ltd | Wholesale & retail | 2018 |
| Dkss Security Services Ltd | Administrative & support | 2021 |
| DL Allen Properties Limited | Real estate | 2023 |
| DL Insurance Services Limited | Financial services | 1994 |
| DL Retail Ltd | Wholesale & retail | 2017 |
| DL Total Hockey Limited | Other services | 2013 |
| Dlan Consulting Limited | Professional & scientific | 2024 |
| Dlaser Ltd | Manufacturing | 2017 |
| DLB Acquisitions Limited | Financial services | 2026 |
| DLB Fieldsports Ltd | Wholesale & retail | 2021 |
| DLF Norfolk Limited | Administrative & support | 2014 |
| Dlft Consultancy Services Ltd | Administrative & support | 2017 |
| DLG Pension Trustee Limited | Financial services | 2014 |
| DLH Finance Ltd | Financial services | 2024 |
| DLK Roofing Norwich Ltd | Construction | 2020 |
| DLM Tuning Ltd | Wholesale & retail | 2025 |
| DLN Electrical Services Ltd | Construction | 2023 |
| DLR Management Services Ltd. | Professional & scientific | 2016 |
| Dlrb Ltd | Professional & scientific | 2025 |
| DLS Holdings Ltd | Financial services | 2022 |
| DLV Technologies Ltd | Manufacturing | 2024 |
| DLZ Trucking Limited | Transport & logistics | 2018 |
| DM Operating Ltd | Manufacturing | 2019 |
| DM Statistical Services Ltd | Professional & scientific | 2002 |
| DM Upgrades Ltd | Professional & scientific | 2020 |
| DM Weeds Limited | Financial services | 2022 |
| DMB Norwich Limited | Construction | 2003 |
| DMB Scaffolding (East) Ltd | Construction | 2026 |
| DMB Urology Ltd | Health & social care | 2022 |
| DMC Procurement Services Ltd | Professional & scientific | 2017 |
| Dmcintosh Media Ltd | Information & communication | 2025 |
| DMD Auto Services Limited | Wholesale & retail | 2022 |
| DMD Commercial Lettings Ltd | Real estate | 2022 |
| DMD Electrical Services Ltd | Construction | 2014 |
| DMD Green Energy Ltd | Construction | 2022 |
| DMD Group Holdings Ltd | Financial services | 2018 |
| DMD Installations Limited | Construction | 2004 |
| DMD Lettings Ltd | Real estate | 2022 |
| DMG Transport Limited | Transport & logistics | 2025 |
| DMH Hire Limited | Administrative & support | 2012 |
| Dmit Consulting Limited | Information & communication | 2023 |
| DMJ Heating Services Limited | Professional & scientific | 2013 |
| DMK Contractor Limited | Manufacturing | 2015 |
| DML Innovations Limited | Professional & scientific | 2012 |
| DMN Healthcare Limited | Health & social care | 2002 |
| DMS Complete Electrical Services Ltd | Construction | 2006 |
| DMS Property Solutions Ltd | Real estate | 2019 |
| DMS Roofing & Cladding Limited | Construction | 2015 |
| DMS Tax Consultancy Ltd | Professional & scientific | 2015 |
| Dmtr Ltd | Professional & scientific | 2023 |
| DMW Building Solutions Limited | Construction | 2025 |
| DN Motors Ltd | Wholesale & retail | 2018 |
| DN1 Holdings Ltd | Real estate | 2022 |
| DNA Bioservices International Limited | Professional & scientific | 2016 |
| DNA Transport Services Ltd | Transport & logistics | 2024 |
| DNB Consultancy Limited | Professional & scientific | 2014 |
| DNB Roofing Services Ltd | Construction | 2025 |
| DNK Velev Limited | Transport & logistics | 2016 |
| DNM Electrical Solutions (East Anglia) Limited | Construction | 2019 |
| DNR Tunnelling Limited | Construction | 2019 |
| DO NOT Disturb Events Ltd | Arts & recreation | 2023 |
| DO Valeting Ltd | Other services | 2018 |
| Dobson Danby Ltd | Professional & scientific | 2005 |
| Dobson Management Ltd | Construction | 2019 |
| Docbuster Limited | Information & communication | 2013 |
| Docos Media Limited | Information & communication | 2025 |
| Doctor Battleaxe Limited | Information & communication | 2025 |
| Docunetic Limited | Information & communication | 2003 |
| Dodadine Ltd | Wholesale & retail | 2011 |
| Dodderman Training Limited | Education | 2025 |
| Doel Investment Ltd | Financial services | 2018 |
| Dofs Trades Ltd | Wholesale & retail | 2022 |
| Dofygate Limited | Manufacturing | 2012 |