| Crown Fit OUT Ltd | Construction | 2013 |
| Crown Group Ltd | Construction | 2025 |
| CSQUARE2 Limited | Health & social care | 2022 |
| Cubist Cloud Ltd | Information & communication | 2019 |
| Curtis Farm Business Park Ltd | Real estate | 2025 |
| Custom IT Solutions Limited | Information & communication | 2009 |
| D Burr Groundworks Limited | Construction | 2007 |
| D Everett Transport Ltd | Transport & logistics | 2024 |
| D F Roofing Ltd | Construction | 2011 |
| D Gray Consultancy Ltd | Professional & scientific | 2012 |
| D J Cotton & Sons Funeral Directors Limited | Other services | 2021 |
| D&C Catering Ltd | Hospitality | 2022 |
| D&G Interior Systems Ltd | Construction | 2009 |
| D'Lux Nails & Spa Ltd | Other services | 2026 |
| D. Martyn Stonemasonry Limited | Manufacturing | 2008 |
| D.J.V. Logistics Limited | Transport & logistics | 2011 |
| D.J.V. Transport & Forwarding Limited | Transport & logistics | 1975 |
| Daglan Developments Ltd | Real estate | 2016 |
| Daglan Homes Ltd | Real estate | 2025 |
| Daly Contractors Limited | Professional & scientific | 2016 |
| Danann Property Limited | Real estate | 2023 |
| Dasaam Limited | Health & social care | 2019 |
| Dataspace (UK) Limited | Transport & logistics | 1999 |
| Davey Evett Services Ltd | Transport & logistics | 2023 |
| David Healthcare Services Ltd | Health & social care | 2024 |
| DC Holding Services Limited | Construction | 2019 |
| DCM Build Ltd | Construction | 2020 |
| DCS Global Logistics Ltd | Transport & logistics | 2021 |
| DD Heating and Plumbing Ltd | Construction | 2023 |
| Debut Futures CIC | Education | 2025 |
| Debut Futures Impact C.I.C. | Education | 2025 |
| Debut One Ltd | Information & communication | 2026 |
| Debut Property Holdings Ltd | Real estate | 2026 |
| Debut Property Investments Ltd | Real estate | 2025 |
| Decks & Spaces Ltd | Wholesale & retail | 2025 |
| Decoded by Design Ltd | Information & communication | 2013 |
| Decodiva Ltd | Extraterritorial | 2023 |
| DEJ Consulting Ltd | Construction | 2018 |
| Deluxehomegroup Limited | Construction | 2025 |
| DEM Logistics Limited | Transport & logistics | 2019 |
| Derajac Foods Ltd | Manufacturing | 2020 |
| Deshaze Limited | Real estate | 2018 |
| Desiriah Beauty Limited | Other services | 2025 |
| Dessert Time Ltd | Hospitality | 2026 |
| Destiny Entertainments Holding Limited | Financial services | 2015 |
| Destiny Entertainments Limited | Wholesale & retail | 2007 |
| DG Finishing Ltd | Construction | 2026 |
| Dgmge Recoveries Ltd | Administrative & support | 2017 |
| Dialogue Therapy Ltd | Health & social care | 2023 |
| Diamondhand Care Limited | Other services | 2016 |
| Dig-T Engineering Limited | Professional & scientific | 2024 |
| Dillon Lifts Ltd | Manufacturing | 2013 |
| Dingbat Creamery Limited | Extraterritorial | 2013 |
| Direct Beds 2 U Limited | Wholesale & retail | 2016 |
| Direct Packaging & Solutions Ltd | Administrative & support | 2023 |
| Direct Roofing & Home Improvement Contractors Ltd | Construction | 2023 |
| Direct Sealants Limited | Construction | 1997 |
| Disposable Packaging Ltd | Wholesale & retail | 2012 |
| Diya Property Ltd | Real estate | 2022 |
| Diya Social Care Consultancy Ltd | Information & communication | 2018 |
| DJ Ross Byrne Ltd | Arts & recreation | 2015 |
| DJF Pro-Services Ltd | Professional & scientific | 2017 |
| DKK Traders Limited | Wholesale & retail | 2019 |
| DLS Builders Limited | Construction | 2022 |
| DMC Fire Protection Consultancy Ltd | Construction | 2020 |
| Dmdr Limited | Transport & logistics | 2023 |
| DMN Electrical Ltd | Construction | 2022 |
| Dodap Healthcare Services Limited | Health & social care | 2020 |
| Dolly's Dog Field Ltd | Arts & recreation | 2018 |
| Dorboliza Limited | Construction | 2025 |
| Dorel Services Limited | Transport & logistics | 2014 |
| Dose of Bloom Ltd | Manufacturing | 2026 |
| Double Parking Systems Ltd | Construction | 1996 |
| Dover & Beales Property Ltd | Real estate | 2023 |
| DR Sajid Khawaja Ltd | Health & social care | 2017 |
| Dr-Hyphen Ltd | Information & communication | 2017 |
| Dreams Creator Network Ltd | Information & communication | 2025 |
| DRO Global Ltd | Wholesale & retail | 2025 |
| DRS (Direct Removal Services UK) Limited | Construction | 2016 |
| DS Letting Services Ltd | Real estate | 2025 |
| DSM Commercial Services Ltd | Wholesale & retail | 2025 |
| DTL Liyaba Limited | Financial services | 2023 |
| DUN Couriers Ltd | Wholesale & retail | 2026 |
| Dunaykayz Property Ltd | Real estate | 2025 |
| Duran & Co Construction Ltd | Construction | 2025 |
| DV Keys Ltd | Wholesale & retail | 2019 |
| DW 50 Limited | Administrative & support | 2010 |
| Dyita Consulting Limited | Information & communication | 2025 |
| D’Elites Menu Ltd | Wholesale & retail | 2024 |
| E.S.A Car FIX Garage Limited | Wholesale & retail | 2020 |
| Eaglets Limited | Transport & logistics | 1977 |
| East Thurrock Community Association CIC | Hospitality | 2024 |
| Easy Van Rentals Ltd | Administrative & support | 2025 |
| Easy-Hemmings Ltd | Information & communication | 2017 |
| Easylyfe Limited | Wholesale & retail | 2024 |
| EBH Motive Limited | Information & communication | 2016 |
| Ebunyb Limited | Manufacturing | 2025 |
| Econ Propeller Ltd | Manufacturing | 2007 |
| Eden Daniels Ltd | Wholesale & retail | 2018 |
| Edgar's Builders Ltd | Construction | 2023 |