| Cross Cultural Communication Services Ltd | Professional & scientific | 2025 |
| Cross Lane (Hornsey) Management Company Limited | Real estate | 2019 |
| Crossix Limited | Wholesale & retail | 2025 |
| Crown Educare Limited | Education | 2023 |
| Crown Energycare Limited | Administrative & support | 2024 |
| Crowning Glory Ministries Church | Other services | 2011 |
| Crowns & Culets Limited | Wholesale & retail | 2016 |
| Crownwise Consult Ltd | Professional & scientific | 2007 |
| Crownwise Properties Ltd. | Real estate | 2017 |
| Crownwise Resources Limited | Administrative & support | 2017 |
| Crrra Limited | Hospitality | 2023 |
| Crumbs Bakery (Erith) Ltd | Wholesale & retail | 2018 |
| Crystabells Limited | Professional & scientific | 2020 |
| Crystal ITE Cleaning Ltd | Other services | 2017 |
| Crystal Promise Ltd | Administrative & support | 2016 |
| Crystal Ventures Services Limited | Health & social care | 2019 |
| Crystalinks Investment & Services Ltd. | Real estate | 2015 |
| Cseale Limited | Education | 2021 |
| CSM Oluata Ltd | Construction | 2018 |
| Cspace Services Ltd | Health & social care | 2026 |
| CTM Property Investments Ltd | Real estate | 2025 |
| CU Research and Services Ltd | Education | 2015 |
| Cube Stonemasonry and Building Restoration Ltd | Manufacturing | 2024 |
| Cummins Electrical Services Ltd | Professional & scientific | 2026 |
| Curecomm CIC | Health & social care | 2021 |
| Current Direction Limited | Construction | 2015 |
| Custom Built Portable Containers Ltd | Construction | 2025 |
| Custom Live UK Limited | Administrative & support | 2024 |
| Custom Wheels LDN Limited | Wholesale & retail | 2024 |
| Cwstylelife Ltd | Wholesale & retail | 2024 |
| Cynjo Services Ltd | Construction | 2017 |
| Czineth Ltd | Professional & scientific | 2020 |
| D & G Social Work Limited | Health & social care | 2024 |
| D Brown Commercials Limited | Transport & logistics | 2016 |
| D Commercials Ltd | Wholesale & retail | 2025 |
| D Dele Ltd | Information & communication | 2016 |
| D O Streatham High Foods Ltd | Hospitality | 2024 |
| D Ward Maintenance (UK) Limited | Construction | 2015 |
| D Ward Plumbing Limited | Construction | 2006 |
| D&B Vent Ltd | Construction | 2021 |
| D&D Haulage Limited | Construction | 2017 |
| D&T Cleaning Ltd | Administrative & support | 2016 |
| D'Lounge Limited | Hospitality | 2012 |
| D'Protégé Services Limited | Administrative & support | 2024 |
| D.Abbottholdings Ltd | Professional & scientific | 2026 |
| D.D Johnson Consulting Ltd | Administrative & support | 2015 |
| D.P. Builders and Construction Ltd | Construction | 2007 |
| D3 Living Ltd | Real estate | 2025 |
| DA Cruz Housing Services Ltd | Real estate | 2026 |
| DA8 Tipping Ltd | Construction | 2021 |
| Dafinit (Global) Limited | Information & communication | 2025 |
| Dafinit (UK) Limited | Information & communication | 2022 |
| Daj&J Properties Ltd | Real estate | 2026 |
| Daja Holdings Ltd | Financial services | 2022 |
| Dale 1960 Limited | Extraterritorial | 2013 |
| Damidigital Ltd | Professional & scientific | 2024 |
| Dangrygames Ltd | Wholesale & retail | 2021 |
| Daniel & Car Limited | Transport & logistics | 2026 |
| Danita Limited | Health & social care | 2013 |
| Danly Funeral Assistance Limited | Other services | 2015 |
| Dantek Solutions Ltd | Information & communication | 2020 |
| DAR Construction Services Ltd | Construction | 2022 |
| Darax Health Care Limited | Health & social care | 2024 |
| Darent Haulage Services Limited | Transport & logistics | 2023 |
| Darent Technology Ltd | Information & communication | 2024 |
| Darenth Waste Limited | Water & waste | 2022 |
| Dartford Composites Holdings Limited | Financial services | 2018 |
| Dartford Composites Limited | Manufacturing | 1989 |
| Dartford Home Care Ltd | Health & social care | 2019 |
| Dash Crafts Ltd | Wholesale & retail | 2025 |
| Data Projections Limited | Professional & scientific | 2016 |
| Datren Properties Limited | Real estate | 2022 |
| Dauntless Developments Limited | Real estate | 2021 |
| Davfub UK Ltd | Real estate | 2024 |
| Daybyday Childcare Ltd | Health & social care | 2025 |
| Daybyday Properties Ltd | Real estate | 2024 |
| Daytemto Ltd | Real estate | 2021 |
| Daytronics Ltd | Wholesale & retail | 2016 |
| DB Consultancy and Supplies Ltd | Manufacturing | 2022 |
| DB Private Tutoring Limited | Education | 2026 |
| DD Assets Limited | Real estate | 2020 |
| DD Ecommerce Ltd | Wholesale & retail | 2025 |
| DDB Property Services Ltd | Real estate | 2024 |
| DE Himalaya Ltd | Wholesale & retail | 2022 |
| DE Ronk Ltd. | Wholesale & retail | 2018 |
| DE White Hart Restaurant Limited | Hospitality | 2018 |
| De-Lighthouse Homes Ltd | Health & social care | 2018 |
| De-Nyke Ltd | Information & communication | 2019 |
| De-Reg Limited | Real estate | 2021 |
| Debash Cash & Carry Ltd | Wholesale & retail | 2023 |
| Debra Emmanuel Limited | Health & social care | 2018 |
| DEE & Bee’S Ltd | Hospitality | 2022 |
| Deejay Fades Ltd | Other services | 2024 |
| Deelish Kitchen Limited | Hospitality | 2023 |
| Deeone Consult Limited | Transport & logistics | 2016 |
| Deep Art Production Limited | Information & communication | 2014 |
| Deepamza Limited | Administrative & support | 2019 |
| Deepwells Capacity Limited | Real estate | 2023 |
| Defacto Spice and Seeds Limited | Agriculture & fishing | 2025 |
| Degho Limited | Information & communication | 2025 |