| Calder Park (Bowgreave) Management Company Limited | Households | 2019 |
| Calder Windmill Limited | Hospitality | 2021 |
| Calderwood Properties (NW) Ltd | Real estate | 2021 |
| Caldew Coaches Limited | Transport & logistics | 2000 |
| Caldwell Haines Associates Limited | Construction | 2008 |
| Calibra Services Limited | Financial services | 2023 |
| Calibration and Repair Services Limited | Professional & scientific | 1994 |
| Call Cabin Limited | Wholesale & retail | 2003 |
| Calmer Sea Limited | Professional & scientific | 2015 |
| Calpac Ltd | Administrative & support | 2008 |
| Caltech I.T. Limited | Information & communication | 1999 |
| Caltz Investment Holdings Ltd | Financial services | 2019 |
| Caltz Investments Ltd | Hospitality | 2017 |
| Calvert Court Limited | Households | 1998 |
| Calvey Commercials Ltd | Wholesale & retail | 2024 |
| Calypso Flooring Limited | Transport & logistics | 2003 |
| Cam.Bar Limited | Hospitality | 2023 |
| CAM.BAR2 Limited | Hospitality | 2025 |
| Cambos Enterprises Limited | Professional & scientific | 2007 |
| Camcrete NW Ltd | Extraterritorial | 2025 |
| Camden Place Dental Implant Centre Limited | Health & social care | 2022 |
| Cameo Developments Ltd | Construction | 2020 |
| Camera Technology Northwest Ltd | Manufacturing | 2014 |
| Cameron Clarke Associates Limited | Other services | 2016 |
| Cameron Clarke Leasing Limited | Financial services | 2003 |
| Camileir Limited | Health & social care | 2015 |
| Camp 101 Ltd | Administrative & support | 2026 |
| Campbells Cuerden Holdings Limited | Real estate | 2015 |
| Campbells Cuerden Park Homes Limited | Real estate | 2015 |
| Campbells Limited | Wholesale & retail | 1956 |
| Camper Supermarket Ltd | Wholesale & retail | 2020 |
| Campers Caravans Limited | Administrative & support | 2014 |
| Campervan Projects Limited | Wholesale & retail | 2017 |
| Campervandom Ltd | Wholesale & retail | 2021 |
| Campi Vitalis Limited | Real estate | 2025 |
| Camrol Limited | Wholesale & retail | 2012 |
| Camz Medical Limited | Health & social care | 2015 |
| Canalside Management Company Limited | Households | 1990 |
| Canary Housing Limited | Real estate | 2025 |
| Canatxx UK LP | | 2008 |
| Cancer Services Ltd | Professional & scientific | 2022 |
| Candid MAN Ltd | Education | 2024 |
| Cando Leads Ltd | Information & communication | 2020 |
| Cando Transport Limited | Transport & logistics | 2000 |
| Candore IT Ltd | Information & communication | 2025 |
| Candy KINGDOM21 Ltd | Wholesale & retail | 2025 |
| Cann DO Limited | Health & social care | 2007 |
| Canning Family Investments Limited | Financial services | 2024 |
| Cannon (NW) Ltd | Other services | 2016 |
| Canopus Media Services Limited | Professional & scientific | 2021 |
| Cantala Education Limited | Education | 2006 |
| Canterbury MOT Centre Ltd | Wholesale & retail | 2012 |
| Capabilityworks Limited | Professional & scientific | 2015 |
| Cape & Monocle Ltd | Professional & scientific | 2023 |
| Capita Investments Limited | Real estate | 2019 |
| Capital Funding Solutions (Services) Limited | Financial services | 2014 |
| Capital Zone Limited | Professional & scientific | 2019 |
| Capitol Carpets by Steve Foster + Associates Limited | Manufacturing | 2002 |
| Cappadocia Preston Ltd | Hospitality | 2025 |
| Capper Properties Ltd | Real estate | 2026 |
| Cappuvino Ltd | Hospitality | 2019 |
| Capri Designs Limited | Wholesale & retail | 2025 |
| Capri Trading Limited | Other services | 2017 |
| Capridge Limited | Construction | 1990 |
| Capset Investments Limited | Financial services | 2011 |
| Capstick Home Design Limited | Wholesale & retail | 2000 |
| Captains Walk Management Company Limited | Households | 2018 |
| Captiva Drive Limited | Real estate | 2017 |
| Captivate Action Ltd. | Administrative & support | 2013 |
| Captivate Legal & Sports Solutions Ltd | Professional & scientific | 2015 |
| Captive Imports Ltd | Other services | 2021 |
| Capture by GLO Ltd | Information & communication | 2024 |
| Capture Cloud Ltd | Information & communication | 2026 |
| Capture Specialist Baits Limited | Agriculture & fishing | 2024 |
| Car Body Magic Limited | Wholesale & retail | 2012 |
| Car Care Garstang Limited | Wholesale & retail | 2003 |
| Car Cottage Racing Limited | Wholesale & retail | 2025 |
| Car Leasing Experts Limited | Financial services | 2020 |
| Car Madness Limited | Wholesale & retail | 2024 |
| Car Marks Limited | Extraterritorial | 1998 |
| Car Network Breakers Ltd | Wholesale & retail | 2023 |
| Car Numbers Limited | Extraterritorial | 1998 |
| Car Operations Limited | Wholesale & retail | 2024 |
| Car Plates Limited | Extraterritorial | 1998 |
| Car Registrations Limited | Extraterritorial | 1998 |
| Caragh Nurseries Limited | Wholesale & retail | 2023 |
| Caraid (NW) Ltd | Wholesale & retail | 2023 |
| Caravanpanels Ltd | Manufacturing | 2015 |
| Carbon Facilities Management Ltd | Administrative & support | 2025 |
| Carbon Maze Limited | Information & communication | 2016 |
| Carbon NET Zero Group Ltd | Professional & scientific | 2023 |
| Carbon Task Force Ltd | Professional & scientific | 2020 |
| Carbonlite Ltd | Administrative & support | 2025 |
| Carbonroots Limited | Professional & scientific | 2011 |
| Carbyne Solutions Ltd | Wholesale & retail | 2014 |
| Card Flower Ltd | Wholesale & retail | 2025 |
| Card Logistics Ltd | Transport & logistics | 2025 |
| Cardale PFI Management Limited | Health & social care | 2004 |
| Cardealr Group Ltd | Wholesale & retail | 2017 |
| Cardyl Lettings Limited | Real estate | 2016 |