| Crosthwaite Property Ltd | Real estate | 2024 |
| Croston Dental Care Limited | Health & social care | 2009 |
| Crouch Mining Limited | Manufacturing | 1978 |
| Crow Nest Drive Management Company Limited | Real estate | 2004 |
| Crow Overseas Freight Limited | Transport & logistics | 1982 |
| Crow Trees Medical Limited | Health & social care | 2015 |
| Crowchek Properties Ltd | Real estate | 2025 |
| Crowd of Flowers Ltd | Wholesale & retail | 2022 |
| Crowded Technology Limited | Information & communication | 2016 |
| Crowdr Limited | Real estate | 2016 |
| Crowdynews Limited | Information & communication | 2019 |
| Crown & Anchor (Rodley) Ltd | Hospitality | 2012 |
| Crown & Canter International Limited | Wholesale & retail | 2026 |
| Crown & Sterling Ltd | Wholesale & retail | 2026 |
| Crown Acquisition Bidco Limited | Professional & scientific | 2014 |
| Crown Cleaners Limited | Administrative & support | 2026 |
| Crown Construction Projects Ltd | Construction | 2019 |
| Crown Consulting & Legal Documents Ltd | Professional & scientific | 2025 |
| Crown Consulting Ltd | Professional & scientific | 2023 |
| Crown Dental Clinics Limited | Administrative & support | 2021 |
| Crown Dental Practice Limited | Extraterritorial | 2007 |
| Crown Driveways Leeds Ltd | Construction | 2020 |
| Crown Eyeglass Limited | Manufacturing | 1983 |
| Crown HLM UK Ltd | Wholesale & retail | 2025 |
| Crown Link Limited | Wholesale & retail | 2019 |
| Crown Lounge Limited | Hospitality | 2018 |
| Crown Properties Leeds Ltd | Real estate | 2021 |
| Crown Roofing Leeds Ltd | Construction | 2026 |
| Crown Selections Ltd | Wholesale & retail | 2025 |
| Crown Sellar Ltd | Wholesale & retail | 2026 |
| Crown Vault Ltd | Wholesale & retail | 2026 |
| Crown Waste Management (Leeds) Ltd | Water & waste | 2026 |
| Crown Windows (Leeds) Limited | Construction | 2003 |
| Crowncity Chinese Restaurant Ltd | Hospitality | 2017 |
| Crownford Consulting Limited | Professional & scientific | 2011 |
| CROWNLS1 Limited | Hospitality | 2025 |
| Crownpoint SMP Ltd. | Other services | 2025 |
| Crowther Plant Ltd | Professional & scientific | 2023 |
| Crowther Properties Ltd. | Real estate | 2025 |
| Crozest Ltd | Administrative & support | 2025 |
| CRP Group Global Ltd | Administrative & support | 2020 |
| Crpb T/A Carmon Hair Design Ltd | Other services | 2024 |
| CRQ Limited | Professional & scientific | 2016 |
| CRS Aviation Ltd | Transport & logistics | 2018 |
| CRS Communications Limited | Manufacturing | 2007 |
| CRS IT Services Limited | Information & communication | 2018 |
| CRS Modern Living Limited | Real estate | 2026 |
| CRS Residential Investments Limited | Real estate | 2023 |
| CRS Square Services Ltd | Wholesale & retail | 2026 |
| Crucial Recycling Yorkshire Ltd | Water & waste | 2025 |
| Crucix Ltd | Wholesale & retail | 2013 |
| Cruise International Limited | Wholesale & retail | 2016 |
| Crunchie Leeds Ltd | Hospitality | 2022 |
| Crusader Enterprises Ltd | Administrative & support | 2023 |
| Crusader Industrial Doors Limited | Manufacturing | 2011 |
| Crusader Marketing Ltd | Administrative & support | 2024 |
| Crusader Properties (Leeds) LLP | | 2025 |
| Crush Organics Ltd | Wholesale & retail | 2020 |
| Crushers Delight Limited | Manufacturing | 2020 |
| Crust & Crumb Ltd | Wholesale & retail | 2010 |
| Crust and Crumb 77 Limited | Hospitality | 2020 |
| Crustiq Ltd | Manufacturing | 2024 |
| Crux Physiotherapy Ltd | Health & social care | 2016 |
| Crying Angel Limited | Information & communication | 2014 |
| Cryo Preparation Limited | Manufacturing | 2025 |
| Crypto IT Ltd | Information & communication | 2024 |
| Crypto Miners Ltd | Wholesale & retail | 2025 |
| Cryptrade Ltd | Wholesale & retail | 2025 |
| Crystal & ROX Limited | Professional & scientific | 2011 |
| Crystal & SON Limited | Manufacturing | 2003 |
| Crystal Bay Properties Ltd | Hospitality | 2024 |
| Crystal Care (2) LUK Midco Limited | Health & social care | 2023 |
| Crystal Care (2) VB Midco Limited | Health & social care | 2025 |
| Crystal Care a Midco Limited | Health & social care | 2025 |
| Crystal Care Group Limited | Health & social care | 2024 |
| Crystal Care H (2) Midco Limited | Health & social care | 2025 |
| Crystal Care H Midco Limited | Health & social care | 2025 |
| Crystal Care Homes (2) Limited | Health & social care | 2023 |
| Crystal Care Homes (2) OB 1 Midco Limited | Health & social care | 2024 |
| Crystal Care Homes (2) OB 2 Midco Limited | Health & social care | 2024 |
| Crystal Care Homes (2) P Midco Limited | Health & social care | 2024 |
| Crystal Care Homes (2) SB Midco Limited | Health & social care | 2023 |
| Crystal Care Homes AUK Limited | Health & social care | 2024 |
| Crystal Care Homes Barrow Limited | Real estate | 2023 |
| Crystal Care Homes Basildon Limited | Real estate | 2025 |
| Crystal Care Homes Beccles Limited | Health & social care | 2026 |
| Crystal Care Homes Bessacarr Limited | Health & social care | 2026 |
| Crystal Care Homes Bexhill Limited | Financial services | 2023 |
| Crystal Care Homes Bicester Limited | Health & social care | 2025 |
| Crystal Care Homes Bolton Limited | Health & social care | 2025 |
| Crystal Care Homes Boulton Moor Limited | Financial services | 2024 |
| Crystal Care Homes Bourne Limited | Financial services | 2025 |
| Crystal Care Homes Braunton Limited | Health & social care | 2025 |
| Crystal Care Homes Broadstairs Limited | Real estate | 2023 |
| Crystal Care Homes Camborne Limited | Health & social care | 2025 |
| Crystal Care Homes Chard Limited | Health & social care | 2024 |
| Crystal Care Homes Chingford Limited | Financial services | 2024 |
| Crystal Care Homes Clay Cross Limited | Real estate | 2024 |
| Crystal Care Homes Coalville Limited | Health & social care | 2025 |
| Crystal Care Homes Crewkerne Limited | Health & social care | 2025 |