| Demystify Research Services Ltd | Professional & scientific | 2023 |
| Denali Professional Ltd | Administrative & support | 2022 |
| Denflow Limited | Construction | 1999 |
| Denham Green Food & Wine Limited | Wholesale & retail | 2018 |
| Denson Enterprises LLP | | 2017 |
| Denson Tradetech Limited | Financial services | 2019 |
| Deol Properties Investment Limited | Real estate | 2026 |
| Departure Technology Ltd | Professional & scientific | 2021 |
| Derham Consulting LLP | | 2016 |
| Derrin Services Ltd | Wholesale & retail | 2015 |
| DES Waddy Ltd | Information & communication | 2015 |
| Deshi-Uk Ltd | Wholesale & retail | 2022 |
| Design Build & Consultancy Ltd | Other services | 2014 |
| Design Designed Planning Ltd | Professional & scientific | 2026 |
| Design Fashions Limited | Transport & logistics | 2003 |
| Designer Spaces Building Ltd | Construction | 2023 |
| Designfolk (UK) Limited | Administrative & support | 2014 |
| Deskpoint Wholesale Ltd | Wholesale & retail | 2026 |
| Destination Valve Supply Limited | Wholesale & retail | 2018 |
| Devignes Limited | Hospitality | 2004 |
| Devignes NO. 2 Limited | Hospitality | 2009 |
| Devignes NO. 3 Limited | Hospitality | 2013 |
| Devine Clinic Ltd | Health & social care | 2025 |
| Devonshire Place Management Company Limited | Households | 1997 |
| DFS Financial Services Limited | Financial services | 2003 |
| DG Electrical (UK) Ltd | Construction | 2013 |
| Dghd Ltd | Professional & scientific | 2020 |
| DGM MOT Limited | Professional & scientific | 2018 |
| DGS Aeroparts Limited | Manufacturing | 2025 |
| DH Fire Consultancy Limited | Public administration | 2010 |
| Dhandahairstylish Limited | Other services | 2025 |
| Di&Ko Limited | Other services | 2015 |
| Diablos Vape Club Ltd | Wholesale & retail | 2019 |
| Dialern Ltd | Wholesale & retail | 2025 |
| Diamalaser Ltd | Construction | 2022 |
| Diamond Decorators & Interiors Ltd | Construction | 2018 |
| Diamond JAY Limited | Administrative & support | 2010 |
| Diamonds Incorporated Limited | Professional & scientific | 2019 |
| Dicio Limited | Information & communication | 2013 |
| Didi Deluxe Services Ltd | Wholesale & retail | 2020 |
| Different Plastering Limited | Construction | 2025 |
| Differently Able Tamils Association (Data) | Other services | 2017 |
| Digdug Limited | Extraterritorial | 2022 |
| Diggity Dog Limited | Hospitality | 2023 |
| Digimacin Limited | Wholesale & retail | 2025 |
| Digital PIE Media Ltd | Information & communication | 2020 |
| Digital Professionals Ltd | Information & communication | 2018 |
| Dillon's Convenience Store Ltd | Wholesale & retail | 2013 |
| Dillons Holdings Ltd | Real estate | 2022 |
| Dilworth Ltd | Construction | 2019 |
| Dineasy Limited | Administrative & support | 2026 |
| Dinks Construction & Engineering Ltd | Construction | 2018 |
| Dinusan Limited | Wholesale & retail | 2024 |
| Dionne's Oriental Ltd | Wholesale & retail | 2023 |
| Direct Cargo Ltd. | Transport & logistics | 2009 |
| Direct Cctv & Security Solutions Limited | Administrative & support | 2003 |
| Direct Cctv (Holdings) Ltd | Financial services | 2020 |
| Direct Cctv Group Ltd | Financial services | 2024 |
| Direct Instal Ltd | Construction | 2025 |
| Direct Oral Care Solutions Ltd | Health & social care | 2025 |
| Direct Staffing Hub Ltd | Hospitality | 2025 |
| Disarmco Global Limited | Professional & scientific | 2015 |
| Disarmco Holdings Limited | Professional & scientific | 2013 |
| Disarmco Limited | Professional & scientific | 2011 |
| Distinct Position Ltd | Professional & scientific | 2018 |
| Divine Life Community Gospel | Other services | 2021 |
| Divine Life Ministries | Other services | 2008 |
| Divine Management Solution Ltd | Real estate | 2021 |
| Dixon Company and Sons Limited | Hospitality | 2017 |
| DJ FAT Adam Ltd | Extraterritorial | 2021 |
| DJF Design Limited | Professional & scientific | 2007 |
| DJG Holdings Ltd | Real estate | 2020 |
| DJH Financial Services Limited | Financial services | 2009 |
| Djil Ltd | Professional & scientific | 2024 |
| Djjd Equine Ltd | Agriculture & fishing | 2025 |
| DJS Accountancy Recruitment Limited | Extraterritorial | 2008 |
| DKF Insolvency Limited | Administrative & support | 2014 |
| DKM Blue Ltd | Professional & scientific | 2008 |
| DL Family Investments Ltd | Real estate | 2022 |
| DLM Management Limited | Administrative & support | 2024 |
| DLS Construction & Fit OUT Ltd | Construction | 2019 |
| DM Construction Builders Ltd | Construction | 2021 |
| DM Plant Hire Ltd | Administrative & support | 2025 |
| DMD Cleaning Ltd | Administrative & support | 2016 |
| DMH Maintenance Contracts Services Limited | Administrative & support | 2005 |
| DN & Hunts Ltd | Wholesale & retail | 2024 |
| DN Golden Key Investments Limited | Real estate | 2026 |
| DN Lakes Limited | Arts & recreation | 2026 |
| DN Project Services Ltd | Construction | 2023 |
| DNG Events Ltd | Hospitality | 2022 |
| DOC Shah Limited | Health & social care | 2021 |
| Docubyte Ltd | Professional & scientific | 2022 |
| Dog Oasis Groomers Ltd | Other services | 2026 |
| Dog Oasis Ltd | Other services | 2025 |
| Dog Social Ltd | Other services | 2021 |
| Dogfixesplane Aviation Services Ltd | Professional & scientific | 2018 |
| Dollymops Cleaning Limited | Administrative & support | 2017 |
| Dolphin Star South East Hand Car Wash Ltd | Other services | 2019 |
| Dolphin V&S Cars Ltd | Other services | 2023 |
| Domum Quarter Limited | Real estate | 2021 |