| Charlton Car Care Ltd | Wholesale & retail | 2018 |
| CHI Health and Care Ltd | Health & social care | 2022 |
| Chicken Pizza Hot Service Limited | Extraterritorial | 2012 |
| Chiengerere Ltd | Health & social care | 2014 |
| Chili Padi London Ltd | Hospitality | 2024 |
| China Garden 999 Ltd | Hospitality | 2025 |
| Christ Church International | Health & social care | 2005 |
| Chur Group Limited | Real estate | 2017 |
| Ciocan Hand Cleaner Ltd | Administrative & support | 2026 |
| Circle Cheema Limited | Wholesale & retail | 2015 |
| Circular Horizons International Ltd | Water & waste | 2024 |
| Citipost Trading Limited | Extraterritorial | 1999 |
| City of GOD Parish London | Other services | 2021 |
| City Rights Properties Limited | Real estate | 2010 |
| Claridge Petroleum Company Limited | Wholesale & retail | 2016 |
| Classles Limited | Wholesale & retail | 2016 |
| CLH Electrical Limited | Construction | 2024 |
| Clifton Properties ( London) Ltd | Real estate | 2019 |
| Cloone Construction Limited | Professional & scientific | 2019 |
| Cloud Draft Ltd | Information & communication | 2023 |
| Cloudale Ltd | Information & communication | 2019 |
| Cloudenj Services Limited | Agriculture & fishing | 2025 |
| CMC Haulage Ltd | Transport & logistics | 2021 |
| Cobra TM Limited | Construction | 2017 |
| Command GAS & Heating Ltd | Construction | 2026 |
| Common Films Limited | Administrative & support | 2012 |
| Computer Future Solution Limited | Information & communication | 2008 |
| Concentriq UK Limited | Wholesale & retail | 2002 |
| Conrad Ranger Limited | Transport & logistics | 2015 |
| Constads Solutions Limited | Transport & logistics | 2025 |
| Constrakane Limited | Construction | 2026 |
| Construction Prosper Limited | Construction | 2021 |
| Constructional Developments Limited | Construction | 2018 |
| Contact Communications Limited | Administrative & support | 2006 |
| Cooling Stone Limited | Construction | 2022 |
| Corja Interiors Ltd | Construction | 2024 |
| Cosgrove Global Ltd | Professional & scientific | 2025 |
| Cosy Home Dwelling Limited | Real estate | 2022 |
| CP Auto Commercial Ltd | Wholesale & retail | 2019 |
| Crabtree Cafe Ltd | Hospitality | 2023 |
| Crayford Waterside Development Limited | Construction | 2024 |
| Creative Company Solutions Limited | Administrative & support | 2019 |
| Cristian Food Ltd | Hospitality | 2025 |
| Crossharbour International (UK) Ltd | Wholesale & retail | 2005 |
| Crownstar Management Limited | Transport & logistics | 1994 |
| Crumb & Sizzle Ltd | Hospitality | 2025 |
| D & a Commercials Ltd | Wholesale & retail | 2014 |
| D & G Construction Ltd | Construction | 2013 |
| D&B Electrics Ltd | Construction | 2026 |
| D&C Transport Ltd | Transport & logistics | 2012 |
| D&G Group Ltd | Professional & scientific | 2023 |
| D&J Care Services-Residential Ltd | Health & social care | 2018 |
| D'Seffys Place Limited | Hospitality | 2025 |
| D.C OIL and Machine Tools Inc. Limited | Construction | 2013 |
| D.G.S. Solutions Limited | Transport & logistics | 2025 |
| Daatview Property Limited | Real estate | 2020 |
| Dagib Consortium Ltd | Health & social care | 2023 |
| Dahelay Daughters Ltd | Wholesale & retail | 2026 |
| Daku Catering Ltd | Hospitality | 2026 |
| DAN B UK Limited | Transport & logistics | 2017 |
| Darrah Ltd | Health & social care | 2026 |
| Dasomacare Limited | Health & social care | 2026 |
| Dave Consultz Ltd | Professional & scientific | 2024 |
| Daynews Creation Limited | Information & communication | 2026 |
| Dayspring Childcare Services Limited | Health & social care | 2024 |
| DC Brixton Accounting Limited | Professional & scientific | 2018 |
| DDY Care Services Limited | Health & social care | 2015 |
| De-Green Limited | Hospitality | 2024 |
| Debat Limited Limited | Health & social care | 2025 |
| Decipher Academy Ltd | Education | 2025 |
| Deefadez Ltd | Health & social care | 2021 |
| Deematri Care Limited | Health & social care | 2015 |
| Deep Scene Media Ltd | Information & communication | 2025 |
| Dehon Combined Solutions Ltd | Construction | 2021 |
| Delcom Consultancy Ltd | Administrative & support | 2014 |
| Delcom World Services Ltd | Administrative & support | 2016 |
| Delolaa DML Limited | Administrative & support | 2022 |
| Dentaluk Supplier Ltd | Wholesale & retail | 2021 |
| Deptford Sheet Metal Ltd | Manufacturing | 2010 |
| Dervish Productions CIC | Arts & recreation | 2022 |
| Devanshi London Limited | Wholesale & retail | 2023 |
| Devloom.Tech Ltd | Information & communication | 2026 |
| Devluk Technologies Ltd | Information & communication | 2020 |
| Dhillon Haulier Limited | Transport & logistics | 2025 |
| Dianornza Ltd | Wholesale & retail | 2025 |
| Digital Guideline Ltd | Education | 2025 |
| Divine Consultancy Services Ltd | Health & social care | 2023 |
| Dixon Photographyuk Ltd | Professional & scientific | 2025 |
| DNP London Ltd | Other services | 2016 |
| Dollyfaceaesthetics Ltd | Other services | 2023 |
| Domestic&Business Ltd | Construction | 2020 |
| Dopizi Real Estate Ltd | Real estate | 2020 |
| Dorel Cleaning Ltd | Construction | 2022 |
| Dova Group Limited | Professional & scientific | 2025 |
| Drdt Constructions Limited | Manufacturing | 2005 |
| Dream Plumbing and Electrical Ltd | Construction | 2024 |
| Dreamlike Properties Limited | Real estate | 2024 |
| DT Electrics Limited | Construction | 2016 |
| Dubra Holdings Ltd | Financial services | 2026 |
| Dubworks LDN Ltd | Extraterritorial | 2023 |