| Cloudtation Genius Ltd | Information & communication | 2023 |
| Cloudwater Brew Co Ltd | Manufacturing | 2014 |
| Cloudwing Solutions Limited | Information & communication | 2025 |
| Cloudy Software Limited | Information & communication | 2021 |
| CLOUDY4CLEAR Ltd | Construction | 2025 |
| Cloudzero Limited | Information & communication | 2011 |
| Cloud’S Studio Ltd | Arts & recreation | 2024 |
| Clough Enterprises Ltd | Wholesale & retail | 2023 |
| Clove Beauty UK LAB Ltd | Other services | 2025 |
| Clovell Advisory Limited | Professional & scientific | 2025 |
| Clover Construction (Lincs) Limited | Construction | 2003 |
| Clover Healthcare Group Ltd | Administrative & support | 2025 |
| Clover Healthcare Services Ltd | Health & social care | 2012 |
| Clover Lawn UK Ltd | Financial services | 2024 |
| Clover Technical Group Limited | Financial services | 2012 |
| Clover Technical Services Limited | Construction | 2005 |
| Clovertame Limited | Real estate | 2018 |
| Cloyal Limited | Wholesale & retail | 2023 |
| CLP Flooring Ltd | Construction | 2021 |
| CLR Construction Group Limited | Construction | 2020 |
| CLR Enhanced Property Ltd | Real estate | 2026 |
| CLR Facilities Limited | Construction | 2020 |
| CLR Group Limited | Construction | 2020 |
| CLS Entertainment Ltd | Arts & recreation | 2023 |
| CLS Intelligence Limited | Information & communication | 2014 |
| CLS IT Services Ltd | Information & communication | 2022 |
| CLS Probate Limited | Professional & scientific | 2009 |
| CLS Properties (Manchester) Limited | Real estate | 2016 |
| CLS Touring Ltd | Arts & recreation | 2025 |
| Clsk Limited | Health & social care | 2023 |
| CLT Cleaners Limited | Administrative & support | 2025 |
| CLT Construction Limited | Construction | 2009 |
| CLT Storage Ltd | Transport & logistics | 2023 |
| CLU Studios Ltd | Professional & scientific | 2022 |
| Club 826 Ltd | Wholesale & retail | 2019 |
| Club Creative Media Company Ltd | Information & communication | 2025 |
| Club DE Padel (Cannon) Limited | Arts & recreation | 2024 |
| Club DE Padel (MF) Limited | Arts & recreation | 2026 |
| Club DE Padel (WR) Limited | Arts & recreation | 2025 |
| Club DE Padel Limited | Arts & recreation | 2023 |
| Club DE Padel Topco Limited | Arts & recreation | 2023 |
| Club Diamond Limited | Wholesale & retail | 2017 |
| Club Holdings Limited | Financial services | 2025 |
| Club Marketing Limited | Professional & scientific | 2025 |
| Club RAT Entertainment Ltd | Arts & recreation | 2026 |
| Club Remake Remodel Limited | Wholesale & retail | 2015 |
| Club Romantico Limited | Arts & recreation | 2021 |
| Club Select Limited | Other services | 2002 |
| Club Spice Limited | Extraterritorial | 2014 |
| Club Supplies Limited | Wholesale & retail | 2025 |
| Club/Radio Cars (Manchester) Ltd | Transport & logistics | 2012 |
| Clubbe Estates Ltd | Real estate | 2025 |
| Clubxangels Ltd | Wholesale & retail | 2021 |
| Cluckin Hot Chicken Limited | Hospitality | 2025 |
| Cluckin Hot Ltd | Hospitality | 2023 |
| Clucksy Wythenshawe Ltd | Hospitality | 2025 |
| Cluck’A’Rito Chicken Bros Limited | Hospitality | 2026 |
| Clue Consultancy Services Ltd | Professional & scientific | 2020 |
| Clues Ltd | Financial services | 2022 |
| Cluett Carpentry Ltd | Manufacturing | 2017 |
| Clune Solutions Ltd | Health & social care | 2025 |
| CLV (Bournemouth 2) UK LLP | | 2013 |
| CLV (ST Andrews) UK 2 LLP | | 2016 |
| CLV (ST Andrews) UK 3 LLP | | 2017 |
| CLV (ST Andrews) UK 4 LLP | | 2021 |
| CLV (ST Andrews) UK LLP | | 2014 |
| CLV Communities Limited | Other services | 2012 |
| CLV Finance UK Limited | Financial services | 2009 |
| CLV UK Holdings Limited | Real estate | 2016 |
| Clver Labs Ltd | Information & communication | 2022 |
| CLY Wilbraham Management Limited | Households | 1988 |
| Clyde Court Management Limited | Other services | 2001 |
| Clyde Heat Network Limited | Extraterritorial | 2023 |
| Clyde Property Management Limited | Households | 2006 |
| Clyde Road Management Company Limited | Households | 1989 |
| Clydegrove Accountants (Manchester) Ltd | Financial services | 2019 |
| Clynder Cables Limited | Manufacturing | 2013 |
| Clythe International Limited | Wholesale & retail | 2013 |
| Clyvon Will Soft Ltd | Information & communication | 2025 |
| CM Consultants Limited | Professional & scientific | 2013 |
| CM Fuel Supply LLP | | 2022 |
| CM Generator Power Services Ltd | Manufacturing | 2017 |
| CM Greenwood Consulting Limited | Professional & scientific | 2018 |
| CM Hospitality Holdings Ltd | Financial services | 2024 |
| CM Installations Limited | Manufacturing | 2022 |
| CM Legal Services Limited | Professional & scientific | 2025 |
| CM Media & Research Ltd | Extraterritorial | 2023 |
| CM Peace Limited | Real estate | 2020 |
| CM Properties (NW) Ltd | Real estate | 2019 |
| CM Propreties Ltd | Real estate | 2026 |
| Cm-Tooling Limited | Manufacturing | 2011 |
| CM31 Ltd | Wholesale & retail | 2026 |
| CMA Creative Ltd | Information & communication | 2025 |
| CMA Manchester Limited | Professional & scientific | 2020 |
| Cmaq Group Ltd | Real estate | 2026 |
| Cmaximara Property Limited | Real estate | 2021 |
| CMB Couriers Limited | Transport & logistics | 2024 |
| CMB IT Ltd | Professional & scientific | 2024 |
| CMB Property Solutions Limited | Real estate | 2024 |
| CMC Daymark Limited | Wholesale & retail | 2009 |