| Calson Tech Limited | Information & communication | 2020 |
| Camber Civil Engineering Limited | Extraterritorial | 2018 |
| Cambray Estates Ltd | Real estate | 2019 |
| Camel Mediation Ltd | Information & communication | 2018 |
| Camell Properties Limited | Real estate | 2018 |
| Cameron Hockley Coaching Ltd | Education | 2023 |
| Campavolt Limited | Manufacturing | 2023 |
| Campobasso Pizzeria Limited | Hospitality | 2024 |
| Can'T Just BE Properties Limited | Real estate | 2018 |
| Canal View RTM Company Limited | Extraterritorial | 2014 |
| Canalside Canines Ltd | Other services | 2025 |
| Canalside Mills Management Ltd | Households | 2019 |
| Canberra Decor Limited | Wholesale & retail | 1987 |
| Candlelight (Oldham) Limited | Hospitality | 1997 |
| Candlelight Lettings Ltd | Real estate | 2021 |
| Candy Crosse Limited | Wholesale & retail | 2025 |
| Cantello Tayler Recruitment Ltd | Administrative & support | 2011 |
| CAP Property Maintenance & Repairs Ltd | Construction | 2026 |
| Capa Group Limited | Financial services | 2023 |
| Capable Consultants (London) Limited | Professional & scientific | 2012 |
| Capagisone Limited | Wholesale & retail | 2025 |
| Capcommerce Ltd | Wholesale & retail | 2025 |
| Capd Holdings Limited | Financial services | 2025 |
| Capd Topco Limited | Financial services | 2026 |
| Capital 21 Limited | Information & communication | 2002 |
| Capital Assets (North) Limited | Administrative & support | 2015 |
| Capital Coolpoint Ltd | Administrative & support | 2026 |
| Capital NW Ltd | Financial services | 2020 |
| Caprice Construction Limited | Construction | 2023 |
| Car & Casa Ltd | Wholesale & retail | 2023 |
| Car Body Supplies (Rochdale) Ltd | Wholesale & retail | 2015 |
| Car Clinic Oldham Ltd | Wholesale & retail | 2026 |
| Car Craft (NW) Ltd | Wholesale & retail | 2025 |
| Car House of Britian Limited | Wholesale & retail | 2016 |
| Car Parts Oldham Ltd | Wholesale & retail | 2017 |
| Car Specialists Limited | Wholesale & retail | 2012 |
| Car Team Limited | Transport & logistics | 2022 |
| Car Today Ltd | Wholesale & retail | 2023 |
| Carayol Holdings Ltd | Financial services | 2025 |
| Carbo-Calc Ltd | Information & communication | 2025 |
| Carbon Correction Services Ltd | Professional & scientific | 2015 |
| Carbon Modelling Limited | Professional & scientific | 2021 |
| Carbon Reduction Planning Ltd | Information & communication | 2023 |
| Carbotix Limited | Wholesale & retail | 2025 |
| Card and Gift Centre Ltd | Wholesale & retail | 2015 |
| Cardox International Group Holdings Limited | Financial services | 2023 |
| Cards Galore NW Ltd | Wholesale & retail | 2017 |
| Care for Life Solutions Ltd | Health & social care | 2022 |
| Care Home Holdings Ltd | Health & social care | 2018 |
| Care Time Initiatives Ltd | Health & social care | 2020 |
| CARE23 Limited | Wholesale & retail | 2014 |
| Carebright Healthcare Group Ltd | Public administration | 2026 |
| Career Developers Limited | Administrative & support | 2024 |
| Caremistro Ltd | Wholesale & retail | 2026 |
| Carey Civils Ltd | Construction | 2026 |
| Carey MC Mullan Ltd | Construction | 2016 |
| Carfax Management (NW) Ltd | Real estate | 2016 |
| Cargo Dynamic Ltd | Transport & logistics | 2024 |
| Carl Hutchins Limited | Manufacturing | 2016 |
| Carlton Ceramics Limited | Construction | 2018 |
| Carlton Print Management Limited | Manufacturing | 2011 |
| Carmovers Limited | Wholesale & retail | 2011 |
| Carol Phelan Echo Services Ltd | Health & social care | 2023 |
| Carology (NW) Ltd | Wholesale & retail | 2024 |
| Carp William Limited | Hospitality | 2020 |
| Carpet DRY Cleaning Ltd | Administrative & support | 2026 |
| Carpetworld and Sleep Tight BED Ltd | Wholesale & retail | 2013 |
| Carpetworld North West Ltd | Wholesale & retail | 2008 |
| Carr House 1960 Limited | Extraterritorial | 2013 |
| Carrhouse Management Company Limited | Households | 1986 |
| Carrmel Court Residents Association Limited | Households | 1994 |
| Carrmovers NW Ltd | Wholesale & retail | 2019 |
| Carsim Ltd | Wholesale & retail | 2025 |
| Carter & Carter Associates Ltd | Health & social care | 2008 |
| Carter and Gordon Construction Ltd | Construction | 2025 |
| Carter's Arms (Oldham) Ltd | Hospitality | 2020 |
| Carthaven Ltd | Wholesale & retail | 2026 |
| Cartlane Ltd | Wholesale & retail | 2024 |
| Cartly Orbit Ltd | Wholesale & retail | 2026 |
| Cartoria Ltd | Wholesale & retail | 2025 |
| Carvalho & Brothers Freight Ltd | Transport & logistics | 2024 |
| Casa Brasil Bar & Restaurant Ltd | Hospitality | 2024 |
| Casa Services Ltd | Administrative & support | 2016 |
| Caseframe Ltd | Wholesale & retail | 2023 |
| Caseiro Limited | Wholesale & retail | 2024 |
| Casement Ventures Limited | Real estate | 2013 |
| Casey & Sons Developments Limited | Construction | 2022 |
| Cashaccounts Limited | Professional & scientific | 2000 |
| Cassels Wear Ltd | Wholesale & retail | 2026 |
| Cassess Ltd | Information & communication | 2012 |
| Cassey Grove Holdings Limited | Financial services | 2023 |
| Cassius Fitness Ltd | Arts & recreation | 2025 |
| Cast Interiors Ltd | Construction | 2018 |
| Castle B Local Ltd | Wholesale & retail | 2025 |
| Castle Commercial Cleaning Limited | Other services | 2013 |
| Castle Jewellers Gold & Silver Limited | Wholesale & retail | 2026 |
| Castle Park Apartments Limited | Real estate | 2019 |
| Castleknock Construction Ltd | Construction | 2012 |
| Castleton Car Sales Limited | Wholesale & retail | 2003 |
| Castlevale Paving & Resin Ltd | Administrative & support | 2025 |