| Crown Safety Services Limited | Administrative & support | 2003 |
| Crown Security Services Ltd | Administrative & support | 2018 |
| Crown Signs Print Ltd | Manufacturing | 2014 |
| Crown Smart Homes Limited | Construction | 2025 |
| Crown Towels Ltd | Manufacturing | 2016 |
| Crown TTS Shop Limited | Wholesale & retail | 2025 |
| Crown Vertex Limited | Transport & logistics | 2025 |
| Crownb Beauty & Spa Limited | Other services | 2026 |
| Crownbridge International Ltd | Wholesale & retail | 2025 |
| Crowne Home Care Limited | Health & social care | 2011 |
| Crownex Construction Ltd | Construction | 2025 |
| Crownfit Solutions Limited | Information & communication | 2024 |
| Crowngate (London) Ltd | Administrative & support | 2021 |
| Crowngrid Engineering Limited | Energy | 2025 |
| Crownjools Ltd | Wholesale & retail | 2022 |
| Crownless Ltd | Wholesale & retail | 2025 |
| Crownlineestates Ltd | Real estate | 2025 |
| Crownlinx Motors Ltd | Wholesale & retail | 2026 |
| Crownmark Housing Ltd | Households | 2025 |
| Crowns Carpets Limited | Wholesale & retail | 2023 |
| Crownstone Accommodation Ltd | Real estate | 2025 |
| Crownstone Commercial and Residential Investments Ltd | Construction | 2025 |
| Crownstone Global Capital Ltd | Real estate | 2025 |
| Crownstone Law Limited | Professional & scientific | 2023 |
| Crownsway Insurance Brokers Limited | Financial services | 1971 |
| Crowntek Ltd | Information & communication | 2025 |
| Crownwell Capital Group Limited | Real estate | 2026 |
| Croxden Quarries Limited | Extraterritorial | 1966 |
| Croy (Glass Fibre) Products Limited | Manufacturing | 2013 |
| Croydon Tower 1 Limited | Real estate | 2017 |
| CRR Manchester Limited | Hospitality | 2023 |
| CRS (FUR Fabrics) Limited | Wholesale & retail | 2002 |
| CRS Group Holding Midlands Ltd | Administrative & support | 2024 |
| CRS Vendor Ltd | Wholesale & retail | 2022 |
| Crsmith.Eventmanagement Ltd | Hospitality | 2017 |
| Crsocials Limited | Manufacturing | 2025 |
| CRT Team Ltd | Other services | 2025 |
| CRTZ11 Ltd | Transport & logistics | 2026 |
| CRU Wine Bar Limited | Hospitality | 2025 |
| Crucks Limited | Construction | 2024 |
| Cruise Automotive Limited | Wholesale & retail | 2022 |
| Cruise Healthcare Limited | Administrative & support | 2022 |
| Crumbl’D Limited | Hospitality | 2025 |
| Crumbs Desserts Limited | Wholesale & retail | 2025 |
| Crumpfields Property Limited | Administrative & support | 2025 |
| Crunch Consulting Limited | Real estate | 2007 |
| Crunomic Accountants Ltd | Professional & scientific | 2024 |
| Crunomic Housing Ltd | Hospitality | 2026 |
| Crusader House Limited | | 1961 |
| Crush Studio Ltd | Other services | 2025 |
| Crusty OWL Investments | Financial services | 2024 |
| Crux Thermal Limited | Manufacturing | 2014 |
| Cruzito Havens Limited | Real estate | 2025 |
| CRW Consulting Limited | Professional & scientific | 2009 |
| Cryfield Capital Limited | Real estate | 2025 |
| Cryotainer B. V. Ltd | Wholesale & retail | 2025 |
| Cryothiux Ltd | Wholesale & retail | 2023 |
| Crypnft Ltd | Financial services | 2021 |
| Cryptid Ltd | Professional & scientific | 2013 |
| Crypto Tax Accountant Ltd | Professional & scientific | 2021 |
| Crystal & Glass Ltd | Wholesale & retail | 2010 |
| Crystal Advice Limited | Financial services | 2015 |
| Crystal Agora Ltd | Wholesale & retail | 2019 |
| Crystal Ball Sales Limited | Wholesale & retail | 2025 |
| Crystal Beauty Limited | Wholesale & retail | 2024 |
| Crystal Bubble Ltd | Education | 2024 |
| Crystal Bubbles Services Limited | Administrative & support | 2025 |
| Crystal Care Cleaners Limited | Other services | 2016 |
| Crystal Catering Limited | Hospitality | 2026 |
| Crystal Clean Birmingham Ltd | Administrative & support | 2019 |
| Crystal Cleanze Supplies Ltd | Wholesale & retail | 2025 |
| Crystal Clear Cleaning Services Inc Ltd | Administrative & support | 2024 |
| Crystal Clear Services Birmingham Ltd | Real estate | 2024 |
| Crystal Consults Ltd | Construction | 2024 |
| Crystal Elegance Limited | Wholesale & retail | 2016 |
| Crystal Event Productions Ltd | Administrative & support | 2025 |
| Crystal Finance.Info Ltd | Financial services | 2020 |
| Crystal General Cleaning Services Ltd | Other services | 2020 |
| Crystal Helix Ltd | Real estate | 2025 |
| Crystal Housing Ltd | Real estate | 2022 |
| Crystal PAK Limited | Wholesale & retail | 2021 |
| Crystal Palace Gems & Minerals Ltd | Wholesale & retail | 2022 |
| Crystal Properties | | 2000 |
| Crystal Radix Ltd | Wholesale & retail | 2024 |
| Crystal Stone Housing Limited | Real estate | 2020 |
| Crystal Systems International Ltd | Information & communication | 2019 |
| Crystal Tax Consulting Ltd | Professional & scientific | 2024 |
| Crystal Wedding Services Ltd | Other services | 2013 |
| Crystal Wellness Ltd | Other services | 2026 |
| Crystal Wills and Estate Planning Ltd | Professional & scientific | 2020 |
| Crystal World Limited | Wholesale & retail | 2025 |
| Crystal Yummy Limited | Hospitality | 2023 |
| Crystal&Clear Services Limited | Wholesale & retail | 2023 |
| Crystalcare Laundry 7 Limited | Administrative & support | 2025 |
| Crystalcovehousing Ltd | Real estate | 2025 |
| Crystalink Jewellery Manufacturing Limited | Wholesale & retail | 1972 |
| Crystallenses Limited | Wholesale & retail | 2024 |
| Crystalline Production Ltd | Professional & scientific | 2022 |
| Crystals Elite Academy Ltd | Arts & recreation | 2025 |
| Crystalview Scan Services Limited | Health & social care | 2023 |