| Cosy Places Limited | Wholesale & retail | 2014 |
| Cosy Rentals MCR Ltd | Real estate | 2025 |
| Cosy Rooms Manchester Ltd | Real estate | 2023 |
| Cosy Roses Ltd | Wholesale & retail | 2021 |
| Cosy Winter Ltd | Wholesale & retail | 2019 |
| Cosyhome Linens Ltd | Manufacturing | 2021 |
| COT Energy Ltd | Energy | 2021 |
| Cotarelli's Ltd | Manufacturing | 2021 |
| Cotax Professionals Limited | Professional & scientific | 2019 |
| Cote Green Ltd | Wholesale & retail | 2024 |
| Cotel Communications Ltd | Information & communication | 2020 |
| Cotex Associates Limited | Wholesale & retail | 2024 |
| Cotham Digital Services Ltd | Other services | 2016 |
| Cotik Homes Limited | Real estate | 2020 |
| Cotswold UK Cameras Limited | Wholesale & retail | 2022 |
| Cottage (NW) Ltd | Hospitality | 2019 |
| Cottage Contract Furnishers Limited | Extraterritorial | 2009 |
| Cottage Weekends Limited | Real estate | 2025 |
| Cotterstock Ltd | Transport & logistics | 2022 |
| Cotto North Ltd | Hospitality | 2019 |
| Cotton (Ancoats) Limited | Hospitality | 2025 |
| Cotton (Bakery) Ltd | Manufacturing | 2025 |
| Cotton (Civic) Ltd | Hospitality | 2025 |
| Cotton (CPK) Ltd | Hospitality | 2026 |
| Cotton (Farnworth Green) Ltd | Manufacturing | 2025 |
| Cotton (Goods Yard) Ltd | Hospitality | 2025 |
| Cotton (Neptune Mill) Ltd | Hospitality | 2026 |
| Cotton Accountancy Services Limited | Professional & scientific | 2014 |
| Cotton Club (UK) Limited | Wholesale & retail | 2001 |
| Cotton Consultancy Limited | Professional & scientific | 2024 |
| Cotton Flux Private Limited | Wholesale & retail | 2026 |
| Cotton Heaven UK Ltd | Other services | 2016 |
| Cotton Hill Estates Ltd | Real estate | 2019 |
| Cotton Holdco Ltd | Hospitality | 2026 |
| Cotton House Limited | Wholesale & retail | 2020 |
| Cotton HUG Limited | Wholesale & retail | 2025 |
| Cotton Limited | Professional & scientific | 2018 |
| Cotton LUX Ltd | Wholesale & retail | 2022 |
| Cotton Management (Ancoats) Limited | Households | 2012 |
| Cotton Management Limited | Professional & scientific | 2025 |
| Cotton Meadows Management Company Ltd | Real estate | 2023 |
| Cotton Media Limited | Information & communication | 2024 |
| Cotton Mill Management Limited | Households | 1998 |
| Cotton Mouse Limited | Extraterritorial | 2008 |
| Cotton Professional Services Limited | Financial services | 2012 |
| Cotton Style Limited | Wholesale & retail | 2024 |
| Cotton Valley Limited | Wholesale & retail | 2024 |
| COTTON2026 Limited | Real estate | 2026 |
| Cottonhawk Limited | Real estate | 2025 |
| Cottonloft Limited | Professional & scientific | 2003 |
| Cottonople Ltd | Wholesale & retail | 2023 |
| Cottonopolis Investments Limited | Real estate | 2016 |
| Cottonopolis Limited | Manufacturing | 2010 |
| Cottonopoly Ltd | Water & waste | 2023 |
| Cotumba Ltd | Construction | 2024 |
| Cotyso Club Ltd | Administrative & support | 2012 |
| Cougar Construction and Build Ltd | Construction | 2018 |
| Cougar Tech Entertainment Ltd | Information & communication | 2026 |
| Coul Archive Ltd | Wholesale & retail | 2026 |
| Could IT BE Magic Ltd | Arts & recreation | 2019 |
| Coulpro Limited | Professional & scientific | 2023 |
| Coulres Limited | Real estate | 2025 |
| Coulson Brook Ltd | Wholesale & retail | 2025 |
| Coulson Pritchard Associates Ltd. | Extraterritorial | 1993 |
| Coulston Limited | Financial services | 2023 |
| Coulthursts Limited | Professional & scientific | 2019 |
| Councel Lalight Ltd | Professional & scientific | 2025 |
| Counselling and Therapy Services Limited | Health & social care | 2002 |
| Counselling Resources Ltd | Health & social care | 2023 |
| Counselling Rooms Manchester Ltd | Health & social care | 2024 |
| Count Opacz Limited | Professional & scientific | 2023 |
| Counter Spec Limited | Manufacturing | 2003 |
| Counterfactual Limited | Professional & scientific | 2012 |
| Countervail Ltd | Professional & scientific | 2022 |
| Countess Court (Radcliffe) Management Company Limited | Households | 1982 |
| Countess Properties Cheshire Limited | Real estate | 2015 |
| Counting Stars Studio Ltd | Wholesale & retail | 2026 |
| Countrole Limited | Extraterritorial | 1987 |
| Country Bakehouse Limited | Professional & scientific | 2007 |
| Country Choice Grocer Ltd | Wholesale & retail | 2021 |
| Country Food Services Ltd | Wholesale & retail | 2020 |
| Country Foods Services Ltd | Wholesale & retail | 2006 |
| Country Holmes Limited | Real estate | 2011 |
| Country Park Catering Limited | Hospitality | 2017 |
| Country Sky Housing Services Limited | Real estate | 2021 |
| Country Towns Mission Trust Limited | Professional & scientific | 1936 |
| Countrylass Ltd | Financial services | 2010 |
| Countrywide Auto Transporter Ltd | Wholesale & retail | 2023 |
| Countrywide Freight Group Limited | Transport & logistics | 1994 |
| Countrywide Locums Ltd | Health & social care | 2023 |
| Countrywide Property Lawyers Limited | Professional & scientific | 1986 |
| County Frames Limited | Construction | 1971 |
| County Garden Developments Limited | Other services | 2020 |
| County Plastics Limited | Manufacturing | 1988 |
| Countyend Management Company 2 Limited | Households | 2004 |
| Countyend Management Company Limited | Households | 2003 |
| Coupe Castings Limited | Manufacturing | 2014 |
| Coupe Events Ltd | Hospitality | 2026 |
| Coupland Cavendish Ltd | Professional & scientific | 2012 |
| Courage Before Confidence CIC | Education | 2026 |