| Caerus Property Limited | Real estate | 2018 |
| Caesar INK Ltd | Arts & recreation | 2023 |
| Cafe @ the Green Limited | Hospitality | 2025 |
| Cafe Noir Nottingham Ltd | Hospitality | 2026 |
| Cafe Piano (Radcliffe-On-Trent) Ltd | Hospitality | 2008 |
| Cafe Sajwel Limited | Other services | 2025 |
| Cafe XLE Ltd | Hospitality | 2025 |
| Caffe Valeria Ltd | Hospitality | 2021 |
| Caffe Velo Verde Holdings Limited | Financial services | 2024 |
| Caffe Velo Verde Ltd | Hospitality | 2019 |
| Caffe-Inna Limited | Hospitality | 2025 |
| Cafferkey Electrical Contractors Limited | Energy | 2014 |
| Cafferkey Plant Hire Ltd | Construction | 2018 |
| Cafu Services Limited | Households | 2009 |
| Café Pizzeria Limited | Hospitality | 2022 |
| CAG Gumus Limited | Manufacturing | 2021 |
| Cage Championship Series Ltd | Arts & recreation | 2025 |
| Cage Delivery Ltd | Wholesale & retail | 2025 |
| Cageybee Limited | Information & communication | 2009 |
| Caher Developments Ltd | Construction | 2016 |
| CAI Properties Holding Ltd | Real estate | 2024 |
| Caiella Ltd | Hospitality | 2025 |
| Cain Consulting Ltd | Professional & scientific | 2023 |
| Cain Homes Limited | Real estate | 2024 |
| Caine Richardson Ltd | Other services | 2018 |
| Cairns Moorhouse Ltd | Real estate | 2018 |
| Cairo Street Garage Ltd | Other services | 2017 |
| Cairo Transport Ltd | Transport & logistics | 2021 |
| Cait Pubs and Inns Ltd | Hospitality | 2022 |
| CAK Barber Ltd | Other services | 2020 |
| Cake by Sara LOU Ltd | Hospitality | 2020 |
| Cake Craft Group Limited | Wholesale & retail | 2014 |
| Cake Craft World Ltd | Wholesale & retail | 1978 |
| Cake Inn Nottingham Ltd | Wholesale & retail | 2024 |
| Cakes by C Limited | Manufacturing | 2022 |
| Cal-Construction (Midlands) Limited | Construction | 2020 |
| Caladen Ltd | Manufacturing | 2011 |
| Calcium Creative Ltd | Professional & scientific | 2003 |
| Calcium Design Ltd | Extraterritorial | 2003 |
| Calderdale Ltd | Financial services | 2016 |
| Caldwell Ceilings Company Ltd | Manufacturing | 2023 |
| Caleb Construction Limited | Professional & scientific | 2005 |
| Caledonian Lifts Manchester Ltd | Manufacturing | 2017 |
| Calendula (Bebington) Limited | Health & social care | 2021 |
| Calendula Care Group Limited | Health & social care | 2021 |
| Calibourne Ltd | Information & communication | 2023 |
| Calibre Films Ltd. | Information & communication | 2016 |
| Calibrere Consulting Ltd | Information & communication | 2025 |
| Calidad LED Ltd | Manufacturing | 2017 |
| Calixtro Housing Limited | Real estate | 2026 |
| Call AID UK Ltd | Manufacturing | 2024 |
| Call IT Snap Ltd | Hospitality | 2023 |
| Calladine Electrical Services Ltd | Construction | 2024 |
| Callahan, Mcflyntoch and Payne Limited | Professional & scientific | 2020 |
| Callaw Construction Limited | Construction | 2002 |
| Callaw Investments Limited | Real estate | 2015 |
| Callaw Lettings Limited | Real estate | 2004 |
| Called to Teach Ltd | Education | 2025 |
| Callender Brickwork Ltd | Wholesale & retail | 2026 |
| Callon Holdings Limited | Professional & scientific | 2004 |
| Callum Bagshaw Ltd | Wholesale & retail | 2025 |
| Callum Chandler Joinery Installations Limited | Construction | 2023 |
| Callum Gossling Property Ltd | Real estate | 2023 |
| Callum James Accounting Ltd | Professional & scientific | 2020 |
| Callywhite Lane Self Storage Limited | Professional & scientific | 2021 |
| Calmac Property Management Ltd | Real estate | 2015 |
| Calordomus Care Limited | Health & social care | 2024 |
| Calordomus Support Ltd | Health & social care | 2025 |
| Calow Pharmacy Limited | Wholesale & retail | 2014 |
| Calsteph Limited | Other services | 2011 |
| Calton-Rise UK Ltd | Real estate | 2018 |
| Calvary Healthcare Services Limited | Health & social care | 2019 |
| Calverton & District Funeral Service Limited | Other services | 2023 |
| Calverton Clearance Services Ltd | Water & waste | 2021 |
| Calverton Day Nursery Ltd | Education | 2024 |
| Calverton Estates Limited | Households | 2025 |
| Calverton Fish Bar Limited | Hospitality | 2023 |
| Calverton Greens Limited | Wholesale & retail | 2015 |
| Calverton Gymnastics Club | Arts & recreation | 2017 |
| Calverton Miners' Welfare Social Club Limited | Hospitality | 1992 |
| Calverton Properties Limited | Construction | 2025 |
| Calverton Road Stores Limited | Wholesale & retail | 2024 |
| Calverton Signs & Graphics Limited | Administrative & support | 2026 |
| Calverton Supreme Home Care Limited | Health & social care | 2003 |
| Calverton Takeaway Ltd | Hospitality | 2024 |
| Calymru Ltd. | Professional & scientific | 2025 |
| Calypso Lodge Ltd | Hospitality | 2025 |
| Calypso Services Ltd | Real estate | 2018 |
| CAM CAB Ltd | Transport & logistics | 2004 |
| Camamile Randell Limited | Construction | 2009 |
| Camari Protection Services Limited | Administrative & support | 2025 |
| Camboh Collections Ltd | Wholesale & retail | 2024 |
| Cambridge Clinical Laboratories Ltd | Professional & scientific | 2005 |
| Cambridge Dairy Ltd | Manufacturing | 2021 |
| Cambridge House Freehold Ltd | Real estate | 2019 |
| Cambridge Kettering Rheumatologist Limited | Health & social care | 2016 |
| Cambridge Lifts Limited | Manufacturing | 2017 |
| Cambridge Secondary Online Home Education Ltd. | Education | 2020 |
| Cameleon (UK) Limited | Manufacturing | 1990 |
| Camellia House Limited | Health & social care | 2015 |