| CLV Management Ltd | Other services | 2025 |
| Clwd Investments Ltd | Information & communication | 2020 |
| CM Baking Ltd | Manufacturing | 2025 |
| CM Commercial Finance Limited | Professional & scientific | 2009 |
| CM Corporate Limited | Financial services | 2014 |
| CM Decorators Limited | Construction | 2005 |
| CM Delivery Services Ltd | Transport & logistics | 2026 |
| CM Financial Ltd | Professional & scientific | 2019 |
| CM Group Properties Limited | Financial services | 2009 |
| CM Immigration Consulting Ltd | Professional & scientific | 2025 |
| CM Motion Design Ltd | Professional & scientific | 2018 |
| CM Player Development Ltd | Education | 2024 |
| CM Project Consultancy Ltd | Construction | 2025 |
| CM Property (Liverpool) Ltd | Real estate | 2021 |
| CM Residential Lettings Limited | Real estate | 2022 |
| CM Technology Consulting Ltd | Information & communication | 2025 |
| CM Value Bets Ltd | Arts & recreation | 2021 |
| CM Williams Consulting Limited | Professional & scientific | 2019 |
| CMA Automotive Limited | Transport & logistics | 2023 |
| CMA CGM (UK) Holdings Limited | Transport & logistics | 2004 |
| CMA CGM (UK) Shipping Limited | Transport & logistics | 1990 |
| CMA CGM International Holdings UK Limited | Financial services | 2003 |
| Cmagic CIC | Financial services | 2023 |
| Cmav Limited | Financial services | 2014 |
| CMB Distributors Ltd. | Wholesale & retail | 2011 |
| CMB Exploration Ltd | Professional & scientific | 2020 |
| Cmbcare Ltd | Health & social care | 2025 |
| CMC Fit Limited | Hospitality | 2025 |
| CMC Group Ltd | Extraterritorial | 2016 |
| CMC Land Limited | Real estate | 2009 |
| CMC Recruitment Services Ltd | Administrative & support | 2019 |
| Cmck Group Ltd | Administrative & support | 2025 |
| Cmdevelopmentsnw Ltd | Construction | 2025 |
| Cmdistribution Ltd | Wholesale & retail | 2026 |
| CMF 12 Limited | Professional & scientific | 2013 |
| Cmiycdevelopments Ltd | Construction | 2025 |
| CML Build Ltd | Construction | 2023 |
| CMM Logistics (NW) Limited | Transport & logistics | 2020 |
| CMP Film and Media Ltd | Information & communication | 2023 |
| CMP Healthcare Services Ltd | Administrative & support | 2014 |
| CMP Property (NW) Limited | Real estate | 2025 |
| CMR Maintenance Ltd | Construction | 2022 |
| CMS Asset Management Limited | Real estate | 2015 |
| CMS Dampcare Limited | Construction | 2026 |
| CMS Enterprise Ltd | Administrative & support | 2019 |
| CMS Surveys Limited | Professional & scientific | 2016 |
| CMT Security (SW) Ltd | Administrative & support | 2025 |
| CMT Surveyors Ltd | Professional & scientific | 2024 |
| Cmyy Limited | Hospitality | 2023 |
| CN Bakery Limited | Wholesale & retail | 2025 |
| CN Management Services Limited | Professional & scientific | 2014 |
| CN Transport (NW) Limited | Transport & logistics | 2025 |
| CN11 Limited | Other services | 2024 |
| Cnba Ltd | Real estate | 2022 |
| CNC Nutrition Ltd | Wholesale & retail | 2025 |
| CNC Robotics Limited | Manufacturing | 2010 |
| CND Law Ltd | Professional & scientific | 2024 |
| CNI (NW) Ltd | Construction | 2018 |
| CNI Consults Ltd | Other services | 2022 |
| Cnlb Limited | Real estate | 2026 |
| CNR Blinds (NW) Ltd | Wholesale & retail | 2012 |
| CNS Consultancy Services Ltd | Administrative & support | 2016 |
| Co Electrical Ltd | Construction | 2015 |
| Co-Mission CIC | Other services | 2023 |
| Co. Leek Ltd | Administrative & support | 2026 |
| CO2VOLT Ltd | Professional & scientific | 2025 |
| COA Solutions Ltd | Professional & scientific | 2024 |
| Coach Camara Ltd | Arts & recreation | 2021 |
| Coach House Dermatology Ltd | Health & social care | 2021 |
| Coach House Mews Services Ltd | Households | 2023 |
| Coach Mike Chadwick Ltd | Professional & scientific | 2021 |
| Coach Road Developments Limited | Construction | 2013 |
| Coach Tendermix Ltd | Professional & scientific | 2023 |
| Coached Academy Ltd | Arts & recreation | 2026 |
| Coached Futures CIC | Education | 2026 |
| Coaching & Development UK Limited | Administrative & support | 2020 |
| Coaching Climbing Ltd | Extraterritorial | 2012 |
| Coast Leisure Ltd | Financial services | 2023 |
| Coast Redwood Estates Ltd | Construction | 2026 |
| Coastal Developments (NW) Ltd | Construction | 2016 |
| Coastal Inspections Limited | Other services | 2018 |
| Coastguard Holdings Limited | Hospitality | 2019 |
| Coastsense Holdings Ltd | Professional & scientific | 2024 |
| Coastsense Ltd | Professional & scientific | 2017 |
| Coates Events Limited | Other services | 2006 |
| Coates Training Ltd | Other services | 2008 |
| Cobain Ltd | Administrative & support | 2015 |
| Cobble Properties (NW) Ltd | Construction | 2018 |
| Cobden Inns Limited | Hospitality | 2022 |
| Coben Distribution Ltd | Water & waste | 2017 |
| Cobham Murphy PHD Limited | Professional & scientific | 2019 |
| Cobhams Ltd | Professional & scientific | 2002 |
| Cobleys Solicitors Ltd | Professional & scientific | 2000 |
| Cobra Club Ltd | Hospitality | 2025 |
| Cobra Financial Solutions Ltd | Administrative & support | 2009 |
| Cobra Protection Ltd | Administrative & support | 2022 |
| Coburn Mckenna Limited | Professional & scientific | 2016 |
| Coby Ebere Ltd | Arts & recreation | 2024 |
| Cobzaru Trans Ltd | Transport & logistics | 2018 |
| Cochin Carnival Ltd | Arts & recreation | 2026 |