| Crown Linen Hire Ltd | Other services | 2015 |
| Crown Quantity Surveying Ltd | Professional & scientific | 2022 |
| Crown Tyres Ltd | Wholesale & retail | 2025 |
| Crownbridge Enterprises Limited | Wholesale & retail | 2025 |
| Crowncraft Group Ltd | Education | 2026 |
| Crownfield Realty Group Limited | Real estate | 2025 |
| Crownford Limited | Construction | 2025 |
| Crownspire Developments Limited | Real estate | 2025 |
| Crownul Ltd | Transport & logistics | 2025 |
| Crumbs and Cocoa Ltd | Hospitality | 2024 |
| Crux Luxury Wears Ltd | Wholesale & retail | 2022 |
| Crystal Car Hire Ltd | Administrative & support | 2015 |
| Crystal Cleaning Services 24/7 Ltd | Administrative & support | 2026 |
| Crystal Fixing Limited | Construction | 2017 |
| Crystal Security Services Limited | Administrative & support | 2015 |
| CS Marketing Ltd | Professional & scientific | 2022 |
| CSB Plumbing Limited | Construction | 2024 |
| Csdcadca Limited | Financial services | 2026 |
| CT Training Ltd | Education | 2024 |
| Ctg&Tb Ltd | Construction | 2025 |
| Cubic Zirconia Limited | Wholesale & retail | 2026 |
| Cudworth Taxi Repairs Limited | Wholesale & retail | 2008 |
| Cultivating Connections Ltd | Education | 2024 |
| Curemindset Ltd | Health & social care | 2025 |
| Curry District Ltd | Hospitality | 2026 |
| Curry Gold Limited | Hospitality | 2025 |
| Curtean Services Ltd | Wholesale & retail | 2026 |
| Curtis Care Ltd | Public administration | 2024 |
| Custom Made Windows Ltd | Construction | 2018 |
| CUT Above Limited | Construction | 1995 |
| CUT Label Apparel Ltd | Wholesale & retail | 2018 |
| Cutegirlshop Ltd | Wholesale & retail | 2025 |
| CV Smart Limited | Construction | 2025 |
| CVR Development Ltd | Construction | 2021 |
| CVR Hospitality Limited | Administrative & support | 2025 |
| CW Ventures LLP | | 2018 |
| Cyberet Solutions Ltd | Other services | 2024 |
| Cybergemba Limited | Information & communication | 2022 |
| Cycysbakes Ltd | Hospitality | 2022 |
| Cynthynel Ltd | Health & social care | 2022 |
| Cyrenus Limited | Construction | 2008 |
| Cysecure Limited | Information & communication | 2025 |
| D & G Engineering Services Ltd | Professional & scientific | 2016 |
| D & K Pro MAX Ltd | Wholesale & retail | 2026 |
| D & Loghin Ltd | Construction | 2019 |
| D & MA Construction Ltd | Construction | 2020 |
| D L Cheek Services Co Ltd | Public administration | 2023 |
| D Manager Ltd | Wholesale & retail | 2025 |
| D NOT D Ltd | Manufacturing | 2023 |
| D QEU Services Ltd | Other services | 2019 |
| D Supply Limited | Wholesale & retail | 2016 |
| D Tech London Ltd | Wholesale & retail | 2022 |
| D&B Group of Companies Limited | Wholesale & retail | 2026 |
| D&C Executive Transport Limited | Transport & logistics | 2023 |
| D&D Pro FIX Limited | Construction | 2015 |
| D&G Finesse Construction Ltd | Construction | 2024 |
| D&K Mobile Ltd | Wholesale & retail | 2026 |
| D&T 007 Ltd | Construction | 2024 |
| D'Cocina Manchester Limited | Hospitality | 2025 |
| D'Only Vidda Ltd | Wholesale & retail | 2026 |
| D.A.Mccalla Ltd | Professional & scientific | 2019 |
| D.D Construction Line Ltd | Construction | 2026 |
| D.I.S Management Consultancy Services Limited | Professional & scientific | 2015 |
| D.O.G Films Ltd | Professional & scientific | 2025 |
| D3S Logistics Ltd | Transport & logistics | 2025 |
| D3S Properties Ltd | Real estate | 2025 |
| DA Thomas Limited | Transport & logistics | 2014 |
| Dacrima Ltd | Construction | 2019 |
| DAD Design Ltd | Professional & scientific | 2025 |
| Dafe UK Ltd | Professional & scientific | 2019 |
| Dagdogan Limited | Agriculture & fishing | 2018 |
| Dagheata Ltd | Manufacturing | 2025 |
| Dagiene Cleaners Ltd | Administrative & support | 2015 |
| Daibak Ltd | Real estate | 2024 |
| Daily Assistance Limited | Construction | 2022 |
| Daily Grocers Ltd | Wholesale & retail | 2018 |
| Daily Home Accessories Ltd | Wholesale & retail | 2024 |
| Daily Nest Limited | Wholesale & retail | 2025 |
| Daisy Lancaster Ltd | Hospitality | 2023 |
| Daisy Pro Clean Ltd | Administrative & support | 2025 |
| DAK Motors Ltd | Wholesale & retail | 2020 |
| Dalego Ltd | Construction | 2024 |
| Dalla & Partners Ltd | Professional & scientific | 2019 |
| Dallewal Property Ltd | Real estate | 2022 |
| DAM Transserv Limited | Transport & logistics | 2017 |
| Damic Limited | Construction | 2015 |
| Damicglams Events Hire Limited | Administrative & support | 2019 |
| Damney Investments Limited | Financial services | 2018 |
| Dance Dream Limited | Arts & recreation | 2020 |
| Dance Mojo CIC | Health & social care | 2022 |
| Danel Ltd | Wholesale & retail | 2023 |
| Danie Design Ltd | Information & communication | 2021 |
| Daniel Great Services Ltd | Construction | 2025 |
| Danpita Limited | Hospitality | 2024 |
| Darbie Engineering Ltd | Extraterritorial | 2023 |
| Darboz Limited | Hospitality | 2024 |
| Dard & Georgiou Property Ltd | Households | 2020 |
| Dargko Ltd | Wholesale & retail | 2025 |
| Daria Constructions Ltd | Construction | 2024 |
| Daridam Construction Limited | Water & waste | 2025 |