| Cedar Chipping Norton Limited | Other services | 2016 |
| Cedar Consulting (UK) Limited | Information & communication | 1998 |
| Cedar Consulting Holdco Limited | Professional & scientific | 2018 |
| Cedar Environmental Limited | Professional & scientific | 2005 |
| Cedar Grange Properties Limited | Real estate | 2015 |
| Cedar Haven Services Ltd | Administrative & support | 2025 |
| Cedar Wealth Planning Limited | Financial services | 2013 |
| Cedarhaus Ltd | Wholesale & retail | 2015 |
| Cedars Development Ltd | Financial services | 2022 |
| Cedarstone Investments Ltd | Real estate | 2026 |
| Cedarvern Developments Limited | Households | 1977 |
| Cedl Realisations Limited | Wholesale & retail | 2008 |
| Cedra London Construction Ltd | Households | 2025 |
| Cedri Limited | Administrative & support | 2016 |
| Cedric Langley Translations Ltd | Professional & scientific | 2024 |
| Cedric Moanda Limited | Administrative & support | 2023 |
| Ceds (UK Branch) Ltd | Wholesale & retail | 2025 |
| CEE Haulage Ltd | Transport & logistics | 2025 |
| Ceebex Investments Ltd | Construction | 2024 |
| Ceedat Consulting Ltd | Information & communication | 2019 |
| Ceeden Capital Ltd. | Professional & scientific | 2011 |
| Ceeden Consulting Ltd | Professional & scientific | 2023 |
| Ceeds (Midlands) Limited | Health & social care | 2008 |
| Ceejay Trading UK Ltd | Wholesale & retail | 2019 |
| Ceema Global Limited | Professional & scientific | 2011 |
| Ceema Group Limited | Extraterritorial | 2009 |
| Ceetee Healthcare Services Ltd | Health & social care | 2020 |
| Ceewe Care Ltd | Administrative & support | 2014 |
| CEF Optical Services Ltd | Other services | 2018 |
| Cefs Plastic Limited | Wholesale & retail | 2012 |
| Ceftronics Limited | Manufacturing | 2019 |
| Ceilings by Design Limited | Construction | 2014 |
| CEL Housing Ltd | Real estate | 2023 |
| Celeb Accessories Ltd | Administrative & support | 2016 |
| Celebi House Ltd | Information & communication | 2019 |
| Celebration Caterers (Midlands) Limited | Hospitality | 2011 |
| Celebritiez Unisex Ltd | Other services | 2022 |
| Celebrity the Mailbox Ltd | Other services | 2025 |
| Celebz Exprees Ltd | Hospitality | 2023 |
| Celech Integrated Services Ltd | Information & communication | 2013 |
| Celena Solutions Ltd | Wholesale & retail | 2025 |
| Celentyx Limited | Professional & scientific | 2004 |
| Celerix Health Ltd | Information & communication | 2025 |
| Celestara Limited | Wholesale & retail | 2024 |
| Celestia Events Ltd | Professional & scientific | 2025 |
| Celestial Care Ltd | Real estate | 2025 |
| Celestial Church of Christ Ileri-Ati-Majemu Oluwa Parish | Other services | 2018 |
| Celestial Consulting Limited | Professional & scientific | 1997 |
| Celestial Defence Security Ltd | Administrative & support | 2025 |
| Celestial Labs Ltd | Arts & recreation | 2020 |
| Celestial Pharma Ltd | Wholesale & retail | 2018 |
| Celestian Ltd | Manufacturing | 2025 |
| Celestin Ltd | Transport & logistics | 2018 |
| Celgene Receptos Limited | Professional & scientific | 2014 |
| Celgene UK Holdings Limited | Professional & scientific | 2004 |
| Celgene UK Manufacturing (II) Limited | Manufacturing | 2001 |
| Celgene UK Manufacturing Limited | Manufacturing | 2004 |
| Cell Fast Ltd | Wholesale & retail | 2021 |
| Cell Fones Direct Limited | Information & communication | 2021 |
| Cell Xperts Limited | Wholesale & retail | 2023 |
| Cellco Tech Ltd | Administrative & support | 2016 |
| Cellex Solutions Ltd | Information & communication | 2018 |
| Cellite Clinic Limited | Health & social care | 1998 |
| Celloma Ltd | Information & communication | 2024 |
| Celltec Ltd | Information & communication | 2012 |
| Cellular Land Ltd | Wholesale & retail | 2022 |
| Cellular Pathology Partnership Ltd | Health & social care | 2019 |
| Cellular Products Limited | Wholesale & retail | 2017 |
| Celsius Air Technologies Ltd | Professional & scientific | 2020 |
| Celsius GAS & Heating Services Limited | Manufacturing | 2011 |
| Celtic Developments (Penarth) Limited | Construction | 2014 |
| Celtic Heritage Ltd | Wholesale & retail | 2025 |
| Celtic Red Limited | Administrative & support | 2008 |
| Celtic Van Hire Ltd | Administrative & support | 2014 |
| Celvara Limited | Information & communication | 2026 |
| Cemetery Works Limited | Construction | 2015 |
| Cemi Services Ltd | Wholesale & retail | 2024 |
| CEN Media Holdings UK Limited | Professional & scientific | 2025 |
| Cenetax Accountants Ltd | Professional & scientific | 2021 |
| Ceney (Developments) Limited | Construction | 1961 |
| Cenju Investments Ltd | Real estate | 2025 |
| Census Data Ltd | Professional & scientific | 2013 |
| Centaur Robotics Limited | Manufacturing | 2014 |
| Centaur Rose Limited | Professional & scientific | 2012 |
| Centauri Digital CIC | Other services | 2025 |
| Centauri Events Ltd | Arts & recreation | 2025 |
| Centauri Media Ltd | Information & communication | 2025 |
| Centauri Solutions Ltd | Information & communication | 2026 |
| Centaurus Capital U.K. Limited | Real estate | 2018 |
| Centaurus Housing Limited | Real estate | 2026 |
| Centenary Developments Limited | | 2005 |
| Centenary Support Services Ltd | Health & social care | 2018 |
| Centeral Line Technical Services Ltd | Information & communication | 2024 |
| Centinor LP | | 2022 |
| Centle Consumer Company Limited | Wholesale & retail | 2025 |
| Centorian Housing Ltd | Real estate | 2024 |
| Centra Property Group Ltd | Real estate | 2024 |
| Centradigital Ltd | Professional & scientific | 2026 |
| Central & Status Cars Limited | Transport & logistics | 2015 |
| Central (Birmingham) Springs Ltd | Manufacturing | 2001 |