| C & J Regan Property Ltd | Real estate | 2024 |
| C & S Cabs Ltd | Transport & logistics | 2005 |
| C and S Classic Cars Ltd | Wholesale & retail | 2021 |
| C Birch Construction Ltd | Construction | 2023 |
| C D Ball Aviation Ltd | Manufacturing | 2018 |
| C Day Ltd | Professional & scientific | 2015 |
| C J Developments NW Limited | Construction | 2011 |
| C Merren Limited | Construction | 2010 |
| C S Massey Ltd | Wholesale & retail | 2025 |
| C S Porter Limited | Manufacturing | 2007 |
| C Thompson Tarmacadam Ltd | Construction | 2009 |
| C Woods Jewellery Limited | Extraterritorial | 2014 |
| C. Thomas Farming Ltd | Agriculture & fishing | 2009 |
| C.A.M. Property Developers Ltd | Construction | 2017 |
| C.A.S. Construction Ltd | Construction | 2007 |
| C.Flint Joinery and Building Services Limited | Construction | 2019 |
| C.H. Domestic GAS Services Ltd | Construction | 2018 |
| C.Panevamwe Care Services PVT Ltd | Health & social care | 2014 |
| C.R.I. Limited | Extraterritorial | 1999 |
| C.T.C. Health Ltd | Other services | 2018 |
| C17 Holdings Ltd | Financial services | 2019 |
| C2IT Services Limited | Other services | 2019 |
| C3 Collections Ltd | Wholesale & retail | 2020 |
| C9 Club Ltd | Hospitality | 2024 |
| Cable Southport Ltd | Hospitality | 2020 |
| Cadd Wholesale Limited | Wholesale & retail | 2023 |
| Caddesign Limited | Construction | 2004 |
| Cafe Bar N'Ista Limited | Hospitality | 2016 |
| Café 1821 Limited | Hospitality | 2000 |
| Cain Business DEV Ltd | Administrative & support | 2025 |
| Cains Brewery Ltd | Hospitality | 2015 |
| Calcio Ltd | Professional & scientific | 2022 |
| Calculus Legal Costs Holdings Limited | Professional & scientific | 2015 |
| Calder House (Liverpool) Management Company Limited | Real estate | 2014 |
| Caldernet Systems Ltd | Professional & scientific | 2011 |
| Caley Animal Care Ltd | Professional & scientific | 2018 |
| Calliella Properties Ltd | Hospitality | 2025 |
| Calm Complexions Ltd | Other services | 2025 |
| Calm Heating and Renewables Limited | Manufacturing | 2012 |
| Calmac Optimal Ltd | Professional & scientific | 2022 |
| Cambridge Court (Southport) RTM Ltd | Households | 2010 |
| Cambridge Court Management Company (Southport) Limited | Households | 1967 |
| Cambridge Electrical Supplies Limited | Wholesale & retail | 2015 |
| Cambridge EYE Medicolegal Limited | Health & social care | 2025 |
| Cambridge Management Company Limited | Households | 2016 |
| Cambridge Oculoplastics Limited | Health & social care | 2021 |
| CAMBRIDGE129 Ltd | Hospitality | 2019 |
| Camel Train Tech Solutions Ltd | Information & communication | 2022 |
| Cameron Engineering Southport Ltd | Professional & scientific | 2021 |
| Camfx Trading Ltd | Financial services | 2021 |
| Camp & SON Ltd | Wholesale & retail | 2018 |
| Candle Delight (Southport) Limited | Wholesale & retail | 2015 |
| Canine Expert Witness Services Ltd | Professional & scientific | 2025 |
| Cannextract Ltd | Manufacturing | 2018 |
| Cannoli Restaurant Limited | Hospitality | 2024 |
| Cannon Business Solutions Ltd | Administrative & support | 2017 |
| Cantinho DE Lisboa Ltd | Hospitality | 2025 |
| Canuck Geology Limited | Professional & scientific | 2025 |
| Captain's Quarters Southport Limited | Hospitality | 2024 |
| Car Care 4 YOU Ltd | Wholesale & retail | 2023 |
| Cardinal & Co Real Estate Limited | Real estate | 2026 |
| Cardio IS Key Fitness Ltd | Arts & recreation | 2016 |
| Care & Company Northwest Ltd | Households | 2019 |
| Care and Recruitment Employment Ltd | Administrative & support | 2024 |
| Care Concern (NW) Limited | Administrative & support | 2003 |
| Carejoy Healthcare Ltd | Administrative & support | 2014 |
| Carepath Holdings Limited | Professional & scientific | 2025 |
| Caringphysio Limited | Professional & scientific | 2014 |
| Carlisle Court Management Company (Southport) Limited | Households | 1990 |
| Carlos Repairs Limited | Construction | 2024 |
| Carmen Smith Care NW Ltd | Health & social care | 2019 |
| Carmona Holmes Ltd | Real estate | 2019 |
| Carn Cottage Limited | Real estate | 2024 |
| Carnoustie Close Apartments (NO.1) RTM Company Limited | Households | 2011 |
| Carnoustie Close Apartments (NO.2) RTM Company Limited | Households | 2011 |
| Carpet Choice Flooring Limited | Wholesale & retail | 2019 |
| Carpets Direct (Knowsley) Limited | Wholesale & retail | 2003 |
| Carr Lane Property Ltd | Real estate | 2026 |
| Carramore Limited | Professional & scientific | 2019 |
| Carri Group Limited | Wholesale & retail | 2015 |
| Carriages Cafe (ASH Vale) Limited | Hospitality | 2012 |
| Carrilho Paving Ltd | Construction | 2007 |
| Carrington Contracts Limited | Hospitality | 1999 |
| Carrville Limited | Real estate | 2021 |
| Carter North West Ltd | Construction | 2024 |
| Carter Property and Developments NW Ltd | Real estate | 2024 |
| Carthago Groups Ltd | Manufacturing | 2024 |
| Caseys Pizza Limited | Hospitality | 2022 |
| Cashma Limited | Arts & recreation | 2025 |
| Castletown Care Limited | Wholesale & retail | 2023 |
| Catalyst Group II Limited | Professional & scientific | 2009 |
| CATERING2YOU Limited | Wholesale & retail | 2019 |
| Catherine's King ST Limited | Hospitality | 2025 |
| Caton Accountancy Limited | Professional & scientific | 2022 |
| Cavachon Collections Ltd | Wholesale & retail | 2021 |
| Cavendish Residents Limited | Households | 1995 |
| Cayman Islands Limited | Professional & scientific | 2023 |
| Cayzer Properties Limited | Real estate | 2020 |
| CB Commercial Consultancy Ltd | Professional & scientific | 2023 |
| CBA Care Training Limited | Education | 2017 |