| Calibre Rehabilitation Services Ltd | Health & social care | 2018 |
| Caliph Clothing Ltd | Wholesale & retail | 2024 |
| Call to Create CIC | Education | 2024 |
| Callack Consulting Limited | Professional & scientific | 2023 |
| Callthedoc Limited | Health & social care | 2025 |
| Callum Wilkinson Software Limited | Professional & scientific | 2019 |
| Calm Over Chaos Ltd | Information & communication | 2022 |
| Calm Sales Ltd | Wholesale & retail | 2019 |
| Calmer Thoughts Counselling Services Limited | Health & social care | 2025 |
| Caloe Consult Limited | Construction | 2017 |
| Calvin Evans Consulting Ltd | Professional & scientific | 2021 |
| Cambashaw Developments Limited | Financial services | 2022 |
| Cambridge Dragon Holdings Ltd | Real estate | 2018 |
| Cambridge Manchester (Caman) Consulting Limited | Professional & scientific | 2013 |
| Cambridge Mill (Salford) Limited | Real estate | 1958 |
| Cambridge Mill Holdings Limited | Professional & scientific | 2006 |
| Cambridge Storage Limited | Transport & logistics | 1998 |
| Camcas Properties Limited | Real estate | 2026 |
| Camel One MA Ltd | Hospitality | 2022 |
| Camel Towing Services Limited | Transport & logistics | 2023 |
| Camelphat Limited | Information & communication | 2016 |
| Cammhomes Ltd | Real estate | 2021 |
| Camo Commercials Ltd | Real estate | 2026 |
| Camoon's Cudjoes 473 Ltd | Information & communication | 2024 |
| Camorgan Holdings | Administrative & support | 2017 |
| Campbell Mackay (Resources) Limited | Professional & scientific | 2009 |
| Campbell Mackay Limited | Professional & scientific | 2008 |
| Campbell Motor Parts Limited | Wholesale & retail | 2026 |
| Campbell ST MOT Centre Ltd | Wholesale & retail | 2009 |
| Campbells Professional Partnership Limited | Professional & scientific | 2014 |
| Camper Ninja Ltd | Administrative & support | 2021 |
| Camphora Care Ltd | Health & social care | 2023 |
| Campus Cribs (Bolton) Limited | Real estate | 2012 |
| Campus Cribs Limited | Real estate | 2009 |
| Canaries Travel Ltd | Administrative & support | 2021 |
| Canary Digital Limited | Information & communication | 2024 |
| Cancool Ltd | Wholesale & retail | 2023 |
| Candestor Limited | Financial services | 2018 |
| Candidate Enterprises Ltd | Information & communication | 2014 |
| Candidate One Limited | Administrative & support | 2023 |
| Candle Threads UK Ltd | Wholesale & retail | 2022 |
| Candy & Cocoa Ltd | Wholesale & retail | 2023 |
| Candy Cloudy Limited | Wholesale & retail | 2026 |
| Candy Games Limited | Information & communication | 2016 |
| Candylicious (NW) Limited | Wholesale & retail | 2014 |
| Canero Strategic Transport Planning Limited | Administrative & support | 2024 |
| Canetech Ltd | Wholesale & retail | 2023 |
| Canfield Consulting Limited | Information & communication | 2020 |
| Cangaf Limited | Professional & scientific | 2015 |
| Canine Physio Specialists Limited | Professional & scientific | 2024 |
| Canine Vogue Ltd | Wholesale & retail | 2025 |
| Cannon Advisory Ltd | Professional & scientific | 2026 |
| Cannon Systems Limited | Information & communication | 2015 |
| Cannonball Events Limited | Other services | 2013 |
| Cannondoor Ltd | Construction | 2024 |
| Cannt Ecommerice Ltd | Wholesale & retail | 2026 |
| Canonbury Consultants Ltd | Construction | 2022 |
| Canter Shipping and Logistics UK Ltd | Transport & logistics | 2016 |
| Canterbury Fields Management Company Limited | Households | 2009 |
| Canterburys Nursery Capital Ltd | Financial services | 2023 |
| Canterburys Nursery Ltd. | Education | 2010 |
| CANVAS10 Beauty Ltd | Other services | 2023 |
| CAP Transport Services Ltd | Transport & logistics | 2024 |
| Capcon Consulting Co Ltd | Professional & scientific | 2025 |
| Cape Civils Ltd | Construction | 2017 |
| Cape Durban Ltd | Professional & scientific | 2024 |
| Cape Properties Limited | Professional & scientific | 2003 |
| Capelli Hair Studio Limited | Other services | 2006 |
| Capgen Wealth Management Ltd | Financial services | 2025 |
| Capillarian Limited | Information & communication | 2017 |
| Capilli Ltd | Other services | 2022 |
| Capital & Management Services Limited | Financial services | 1995 |
| Capital 806 Ltd | Administrative & support | 2026 |
| Capital Dawah Limited | Information & communication | 2025 |
| Capital Developments Waterloo Ltd | Real estate | 2016 |
| Capital Financial Training Limited | Education | 2003 |
| Capital Horizon GBR Ltd | Real estate | 2023 |
| Capital Investements Ltd | Financial services | 2020 |
| Capital Land Ventures Ltd | Construction | 2023 |
| Capital Leasing Ltd | Real estate | 2022 |
| Capitalia Private Office Limited | Financial services | 2018 |
| Capitol Close Management Company Limited | Real estate | 2002 |
| Capitol Fire & Security Systems Ltd | Construction | 2003 |
| Capri Rose Ltd | Professional & scientific | 2017 |
| Capricorn Legal Ltd | Professional & scientific | 2017 |
| Caps Debt Ltd | Professional & scientific | 2019 |
| Captains View Consultancy Limited | Administrative & support | 2025 |
| Car Clinic Mobile Sector 1.0 Ltd | Administrative & support | 2025 |
| Car Clinic Northwest Ltd | Wholesale & retail | 2024 |
| Car Key Hub Ltd | Other services | 2026 |
| Car Part HUT Ltd | Wholesale & retail | 2020 |
| Car Parts Group Nationwide Ltd | Wholesale & retail | 2024 |
| Car Safe Limited | Manufacturing | 2015 |
| CAR$4U Limited | Wholesale & retail | 2026 |
| Caracas Mobile Chef Services Ltd | Hospitality | 2021 |
| Caralto Holdings Ltd | Extraterritorial | 2023 |
| Caralto Ltd | Wholesale & retail | 2023 |
| Caralto Wholesale Ltd | Extraterritorial | 2023 |
| Caravan Upholstery Limited | Administrative & support | 2004 |
| Carbon Blush Limited | Other services | 2013 |