| Creation by Kestas Ltd | Construction | 2017 |
| Creation Stories Ltd | Information & communication | 2016 |
| Creative Media Publishing Ltd | Professional & scientific | 2024 |
| Cressida Motors Ltd | Wholesale & retail | 2025 |
| Crew Cuts Barbershop Limited | Other services | 2021 |
| Crimson Industries Corporation Ltd | Professional & scientific | 2013 |
| CRO Rigging Ltd | Construction | 2024 |
| Crom Consulting Ltd | Professional & scientific | 2025 |
| Cromwell Corporate Management Limited | Professional & scientific | 2005 |
| Cromwell Secretarial Services Ltd | Extraterritorial | 1994 |
| Cromwell Secretaries Limited | Professional & scientific | 1995 |
| Crooks London Limited | Wholesale & retail | 2025 |
| Crooksldn Ltd | Wholesale & retail | 2025 |
| Cross Oak Limited | Professional & scientific | 1989 |
| Crossroads Partners Limited | Financial services | 2016 |
| Crown House Dental Practice Limited | Health & social care | 2007 |
| CS Partner Management Ltd | Professional & scientific | 2020 |
| CSD Accommodation Ltd | Hospitality | 2023 |
| CSD Real Estate Ltd | Real estate | 2023 |
| CSR Training and Consultancy LLP | | 2008 |
| CTE Holding Ltd | Professional & scientific | 2022 |
| CTR HR Ltd | Administrative & support | 2025 |
| CTR Select Ltd | Administrative & support | 2025 |
| Ctyh Limited | Manufacturing | 2025 |
| CU Design Limited | Construction | 2017 |
| Cult.Global LLP | | 2026 |
| Curated by Evelyn Ltd | Wholesale & retail | 2025 |
| Customwair.Com Ltd | Wholesale & retail | 2020 |
| CXC Entertainment Limited | Arts & recreation | 2025 |
| Cyber Catalog Services Limited | Information & communication | 2025 |
| Cygna Finance Ltd | Professional & scientific | 2020 |
| Cypress Ventures Ltd | Real estate | 2022 |
| D & T Retail Ltd | Wholesale & retail | 2019 |
| D & V Properties Limited | Real estate | 1981 |
| D Luxury Ltd | Wholesale & retail | 2026 |
| D O Edit Limited | Information & communication | 2014 |
| D&D Hospitality Experts Ltd | Professional & scientific | 2025 |
| D&D Roofing Solutions Ltd | Construction | 2018 |
| D&R Family Investments Ltd | Real estate | 2024 |
| D.& D.Automobile Engineers Limited | Wholesale & retail | 1971 |
| D.J. and R.B. Real Estate Ltd | Real estate | 2024 |
| D.W.B. Waste Management Limited | Professional & scientific | 2014 |
| D24 Ltd | Professional & scientific | 2020 |
| D3 Jointing Ltd | Construction | 2025 |
| Daily Trading Limited | Wholesale & retail | 2026 |
| Dalglen (NO. 1904) Limited | Health & social care | 2018 |
| Dalton Court Investments Limited | Financial services | 2010 |
| Damp and Roofing Ltd | Construction | 2025 |
| DAN Rutherford Limited | Administrative & support | 2025 |
| Dance for Stevie Ltd | Arts & recreation | 2022 |
| Dannatt Real Estate Limited | Real estate | 2018 |
| Danny Oliver Film Services Ltd | Administrative & support | 2023 |
| Dapsis Ltd | Information & communication | 2014 |
| Data Connecting People Ltd | Construction | 2014 |
| Data Processes Limited | Extraterritorial | 2006 |
| DATA2WORK Ltd | Professional & scientific | 2022 |
| Datablox Ltd | Information & communication | 2018 |
| Datafab Ltd | Information & communication | 2023 |
| Dataforce Interact Holdings Limited | Administrative & support | 2005 |
| Dataforce Interact Limited | Administrative & support | 2009 |
| Datarepro Limited | Arts & recreation | 2010 |
| Davids Real Estate Investment Ltd | Real estate | 2018 |
| Davidsons Cash and Carry Limited | Wholesale & retail | 2018 |
| Dawson House Collective Ltd | Professional & scientific | 2026 |
| Dawson Reith & Co Limited | Professional & scientific | 2022 |
| Day 1 Studio Limited | Administrative & support | 2016 |
| Dbas Investments Limited | Real estate | 2021 |
| Dbas Properties Limited | Real estate | 2021 |
| DCP Real Estate Ltd | Real estate | 2026 |
| DE Boerdelarij Ltd | Real estate | 2025 |
| DE Borger Ltd | Real estate | 2022 |
| Deals Galore Limited | Wholesale & retail | 2024 |
| Dean Mark Farnworth Services Ltd | Wholesale & retail | 2018 |
| Deanhill Estates Limited | Real estate | 2000 |
| Debmar Housing Ltd | Real estate | 2021 |
| Deboun Ltd | Professional & scientific | 2014 |
| Deli on the Green Limited | Hospitality | 2014 |
| Delore Care Limited | Health & social care | 2020 |
| Delta Hub Ltd | Wholesale & retail | 2025 |
| Demare Property Investments Ltd | Real estate | 2021 |
| Denman Wealth Ltd | Professional & scientific | 2025 |
| Dental Zone Ltd | Health & social care | 2023 |
| DEO Favente Properties Limited | Real estate | 2017 |
| Deol Heavy Systems Limited | Wholesale & retail | 2025 |
| Dereham Enterprises Limited | Information & communication | 1998 |
| Desert Bloom Enterprises Ltd | Water & waste | 2024 |
| Desi Health Collective CIC | Health & social care | 2026 |
| Desired Automotive Limited | Administrative & support | 2019 |
| Despina Pharma Ltd | Wholesale & retail | 2009 |
| Dettling Developments Limited | Extraterritorial | 1998 |
| Devicenow UK Limited | Administrative & support | 2022 |
| Dewberry Property Ltd | Real estate | 2025 |
| DF Glass Designs Limited | Administrative & support | 1998 |
| DF Property Portfolio Limited | Administrative & support | 1971 |
| Dginfinity Ltd | Arts & recreation | 2020 |
| DIA Pharma Limited | Wholesale & retail | 2006 |
| Dicol Effluent Limited | Water & waste | 2005 |
| Diginwest Ltd | Financial services | 2021 |
| Digitalist UK Limited | Information & communication | 2011 |
| Dirty Slice Lunar Park Ltd | Hospitality | 2025 |