| Carisbrook Dental Care Ltd | Health & social care | 2010 |
| Carisbrook UK Properties Ltd | Real estate | 2020 |
| Carisma Services | Other services | 2019 |
| Caritas Eastlands Ltd | Administrative & support | 2022 |
| Carizmo Ltd | Wholesale & retail | 2023 |
| Carl Chapman (Bury) Limited | Other services | 2020 |
| Carl Fallon Joinery Limited | Construction | 2009 |
| Carl Helme Insurance Brokers Limited | Financial services | 2014 |
| Carl Mcgreevy Limited | Transport & logistics | 2008 |
| Carla Perla Ltd | Manufacturing | 2025 |
| Carla Rossi Ltd | Wholesale & retail | 2018 |
| Carleton Consulting Services Ltd | Professional & scientific | 2023 |
| Carley Comps Ltd | Arts & recreation | 2024 |
| Carley Daines and Partners Limited | Professional & scientific | 2017 |
| Carlezz Group Ltd | Wholesale & retail | 2024 |
| Carlick Contract Furniture Limited | Manufacturing | 1973 |
| Carlill Properties Ltd | Real estate | 2025 |
| Carlisle Park Limited | Real estate | 2024 |
| Carlogie House (Services) Limited | Extraterritorial | 1975 |
| Carlos Pinto Limited | Information & communication | 2016 |
| Carlos Rosuero Ltd | Hospitality | 2025 |
| Carlow Field Services Ltd | Manufacturing | 2025 |
| Carlton Corporation Limited | Extraterritorial | 2003 |
| Carlton House Care Limited | Health & social care | 2015 |
| Carlton Lawn Tennis Co.Limited(The) | Real estate | 1921 |
| Carlton Park Construction Ltd | Construction | 2019 |
| Carlton Park Property Management Limited | Real estate | 2016 |
| Carlton Place (Whitefield 2) Management Company Limited | Households | 2011 |
| Carlton Sharpe Ltd | Real estate | 2021 |
| Carlton Social and Bowling Club Building Company Limited | Real estate | 1913 |
| Carlton Social and Bowling Club C.I.C. | Hospitality | 2021 |
| Carlton West Limited | Wholesale & retail | 2024 |
| Carm Enterprises Limited | Professional & scientific | 2017 |
| Carm Music Limited | Information & communication | 2016 |
| Carm Productions Ltd | Professional & scientific | 1998 |
| Carmalor Holdings 2005 Limited | Professional & scientific | 2002 |
| Carmarthen Bay Hotel Limited | Real estate | 2016 |
| Carmarthen Securities Limited | Professional & scientific | 2000 |
| Carmel Auto Limited | Wholesale & retail | 2024 |
| Carmel Care & Support Limited | Health & social care | 2006 |
| Carmel Property Co (Northern) Limited | Real estate | 1995 |
| Carmel Sales and Services Limited | Wholesale & retail | 2026 |
| Carmella Group Limited | Wholesale & retail | 2025 |
| Carmella Wholesale Distribution Limited | Wholesale & retail | 2012 |
| Carmelo Motors Ltd | Wholesale & retail | 2022 |
| Carmen Burnea Interpreting Ltd | Professional & scientific | 2017 |
| Carmen Lucy Tran Limited | Arts & recreation | 2022 |
| Carnage MS Ltd | Wholesale & retail | 2024 |
| Carnational Properties Limited | Real estate | 1960 |
| Carney Civil Engineering Ltd | Construction | 2025 |
| Carnivore Kitchen Ltd | Hospitality | 2025 |
| Carnoria Limited | Wholesale & retail | 2026 |
| Carnoustie Investments Group LLP | | 2014 |
| Carol's Florist (Manchester) Ltd | Wholesale & retail | 2006 |
| Carola Trading Logistic & Services Ltd | Transport & logistics | 2022 |
| Carola Trading Ltd | Wholesale & retail | 2011 |
| Carola Trading Produce Ltd | Wholesale & retail | 2022 |
| Caroline 123 Limited | Public administration | 2022 |
| Caroline Bonnie Allison Ltd | Wholesale & retail | 2025 |
| Caroline Greer Consultancy Ltd | Professional & scientific | 2023 |
| Caroline Greer Property Ltd | Real estate | 2024 |
| Caroline House Developments Limited | Real estate | 2005 |
| Caroline Johnson Consulting Ltd | Information & communication | 2025 |
| Caroline Kerr Limited | Professional & scientific | 2010 |
| Caroline Leacock Beacon of Balance Therapeutic Practice Ltd | Health & social care | 2023 |
| Carolinus Limited | Real estate | 1980 |
| Carousel PR Limited | Professional & scientific | 2012 |
| Carp Fever Limited | Wholesale & retail | 2004 |
| CARPARTS100 Ltd | Wholesale & retail | 2024 |
| Carpathia Management Ltd | Real estate | 2022 |
| Carpatia Holdings Ltd | Wholesale & retail | 2026 |
| Carpe Developments Limited | Construction | 2020 |
| Carpe Diem Music Limited | Information & communication | 2017 |
| Carpe Diems Finest Ltd | Wholesale & retail | 2020 |
| Carpenco Ltd | Construction | 2023 |
| Carpenia Holdings Ltd | Financial services | 2022 |
| Carpenter Design Engineering Limited | Professional & scientific | 2016 |
| Carpenter Rees Consulting Limited | Financial services | 2015 |
| Carpenter Rees Limited | Financial services | 1996 |
| Carpenter Sukar Ltd | Construction | 2026 |
| Carpet Cleaning CC Limited | Administrative & support | 2026 |
| Carpet Cleaning Specialists (Swinton) Ltd | Administrative & support | 2002 |
| Carpet Corner (Atherton) Limited | Wholesale & retail | 2003 |
| Carpet Gallop Limited | Manufacturing | 2016 |
| Carpet House Ltd | Wholesale & retail | 2022 |
| Carpet Land MCR Limited | Wholesale & retail | 2018 |
| Carpet Superstore Ltd | Wholesale & retail | 2012 |
| Carpet Warehouse Manchester Limited | Wholesale & retail | 2025 |
| Carpeteria (UK) Ltd | Wholesale & retail | 2018 |
| Carpets Complete Limited | Wholesale & retail | 2009 |
| Carpets Manchester Limited | Wholesale & retail | 2022 |
| Carphone Services Ltd | Other services | 2002 |
| Carpino Place Management Company Limited | Real estate | 2017 |
| Carpuccinos Limited | Wholesale & retail | 2018 |
| Carpus (UK) Limited | Hospitality | 2003 |
| Carpus Delivery Services Ltd | Transport & logistics | 2020 |
| Carr Green Medical Limited | Health & social care | 2017 |
| Carr IT Limited | Information & communication | 2010 |
| Carr Mills RTM Company Limited | Households | 2008 |
| Carr of Morley Limited | Real estate | 1953 |