| Creo Rooms Ltd | Other services | 2019 |
| Crest Healthcare Limited | Manufacturing | 2023 |
| Crest Innovations Limited | Manufacturing | 2022 |
| Crest Logistics Limited | Transport & logistics | 2008 |
| Crest Medical Holdings Limited | Professional & scientific | 2008 |
| Crest Medical Limited | Wholesale & retail | 1999 |
| Crest Motorsport Northwest Ltd | Manufacturing | 2018 |
| Crew Ventures Ltd | Financial services | 2020 |
| Crewembroidery Limited | Wholesale & retail | 2020 |
| CRH Property Group Limited | Real estate | 2025 |
| Crib Shack Properties Limited | Real estate | 2020 |
| Cribbar Consulting Limited | Professional & scientific | 2025 |
| Crimpit Holdings Ltd | Financial services | 2026 |
| Cris Mathew Ltd | Health & social care | 2024 |
| Cris Patrick Ltd | Transport & logistics | 2016 |
| Crisa Ltd | Transport & logistics | 2025 |
| Crisp GA Limited | Professional & scientific | 2023 |
| Crissmar Ltd | Transport & logistics | 2018 |
| Cristian Telecom Solutions Limited | Administrative & support | 2016 |
| Cristian Trade Limited | Transport & logistics | 2019 |
| Critchell Consultancy Limited | Professional & scientific | 2016 |
| CRJ Events Limited | Manufacturing | 2024 |
| CRM Contracting Services Ltd | Administrative & support | 2025 |
| Crocodile Trading Limited | Wholesale & retail | 2007 |
| Croft Accountancy Services Limited | Professional & scientific | 2019 |
| Croft Additive Manufacturing Ltd | Manufacturing | 2012 |
| Croft Commercial Landscapes & Property Care Ltd | Administrative & support | 2017 |
| Croft Digital Ltd | Professional & scientific | 2022 |
| Croft Equine Limited | Professional & scientific | 1998 |
| Croft Filters Ltd | Manufacturing | 2012 |
| Croft Heating Ltd | Construction | 2026 |
| Croft House Consulting Ltd | Extraterritorial | 2024 |
| Croft Media Ltd | Professional & scientific | 2009 |
| Croft Pensions & Investments Limited | Professional & scientific | 2022 |
| Crofton 87 Engineering Limited | Professional & scientific | 2018 |
| Crofton Alsager (Management Company) Limited | Real estate | 2017 |
| Crofton Consultants Ltd | Real estate | 2022 |
| Crofton Fields Ltd | Administrative & support | 2023 |
| Croll Engineering Consultancy Limited | Administrative & support | 2015 |
| Cromat Ltd | Professional & scientific | 2019 |
| Cromatica Limited | Information & communication | 2013 |
| Cromford IP Ltd | Manufacturing | 2025 |
| Cromwell Equity Limited | Real estate | 2015 |
| Crosby Architecture Limited | Administrative & support | 2014 |
| Crosby Associates Holdings Limited | Financial services | 2020 |
| Crosby Associates Media Limited | Information & communication | 2016 |
| Crosfield Recreational Club CIC | Arts & recreation | 2007 |
| Croshaw Limited | Other services | 2017 |
| Cross Wired Limited | Professional & scientific | 2017 |
| Crossbar Warrington Ltd | Hospitality | 2022 |
| Crossfit Warrington CIC | Arts & recreation | 2024 |
| Crossover Partners Ltd | Wholesale & retail | 2020 |
| Crossthread Commercial Mechanical Engineering Ltd | Administrative & support | 2026 |
| Crosstower (Congleton) Limited | Real estate | 2012 |
| Crosstower (Two) Limited | Real estate | 2001 |
| Crouch Construction Specialists Ltd | Construction | 2017 |
| Crow Wood Enterprises Limited | Mining & quarrying | 2025 |
| Crowded Media (UK) Ltd | Professional & scientific | 2014 |
| Crown Facilities Maintenance Limited | Construction | 2026 |
| Crown Flooring Limited | Construction | 1997 |
| Crown Orange Limited | Information & communication | 2017 |
| Crown Point (Apartments) Residents Management Company Limited | Households | 2022 |
| Crown Removals and Storage Ltd | Other services | 2012 |
| Croxley House Management Limited | Real estate | 2022 |
| Crozier Scott Ltd | Information & communication | 2019 |
| CRR Engineering Limited | Administrative & support | 2013 |
| CRS Custom Renovation Services Ltd | Construction | 2022 |
| CRS Facilities Limited | Construction | 2014 |
| CRS HR Solutions Ltd | Administrative & support | 2019 |
| CRS Law Ltd | Professional & scientific | 2015 |
| CRS Renovations Ltd | Construction | 2025 |
| CRS Roofing Ltd | Construction | 2023 |
| CRT Maintenance Ltd | Administrative & support | 2025 |
| Crtuk Ltd | Information & communication | 2023 |
| Cruicestarkie Ltd | Professional & scientific | 2023 |
| Crunch Analytics Limited | Information & communication | 2017 |
| Crusoe Structures Limited | Administrative & support | 2023 |
| Cruze Elite Access Ltd | Administrative & support | 2026 |
| Crystal Nails and Beauty 41 Ltd | Other services | 2021 |
| Crystal Publications Limited | Information & communication | 1996 |
| CS & BC Investments Ltd | Construction | 2021 |
| CS Couriers & Logistics Limited | Transport & logistics | 2018 |
| CS Electrical Solutions Ltd | Construction | 2025 |
| CS Vending Services Limited | Hospitality | 2013 |
| CSB Strategies Ltd | Professional & scientific | 2018 |
| CSD Engineering & CAD Services Ltd | Construction | 2025 |
| CSE Electrical Ltd | Construction | 2014 |
| CSE Facilities Ltd | Construction | 2025 |
| CSG Food Services Ltd | Hospitality | 2020 |
| CSG Food Vending Services Ltd | Hospitality | 2020 |
| CSH Utilities Ltd | Construction | 2025 |
| CSI Drive Ltd | Wholesale & retail | 2017 |
| Csja Limited | Administrative & support | 2016 |
| CSL Medical Solutions Limited | Health & social care | 2025 |
| Csla Ltd | Public administration | 2011 |
| CSM Capital Limited | Real estate | 2021 |
| CSM Contracting Limited | Administrative & support | 2013 |
| Cssk IT Limited | Administrative & support | 2026 |
| CSU OIL & GAS Projects Management Consulting Limited | Professional & scientific | 2022 |
| CT Designs Bespoke Staircase Solutions. Limited | Construction | 2025 |