| Chums Social Enterprise C.I.C. | Health & social care | 2011 |
| Church Farm Court Management Company Ltd | Households | 2018 |
| Church Lane (Willingham) Company Limited | Households | 1990 |
| Church Lane 1963 Limited | Extraterritorial | 2014 |
| Church Vale News and OFF Licence Ltd | Wholesale & retail | 2023 |
| Churchill Inns (Wellingborough) LLP | | 2011 |
| Churros L Leeds Ltd | Wholesale & retail | 2025 |
| Ciangola Properties Ltd | Real estate | 2025 |
| Ciao Transport Ltd | Transport & logistics | 2025 |
| Cibi D'Italia Ltd | Wholesale & retail | 2018 |
| Cicchetti by the Greedy Italian Ltd | Hospitality | 2019 |
| Cicero Sea Ltd | Administrative & support | 2025 |
| Cichi Services Limited | Transport & logistics | 2016 |
| Cicstart Limited | Professional & scientific | 2012 |
| Cilex Regulation Limited | Other services | 2008 |
| Cillamallia Hair & Beauty Ltd | Other services | 2024 |
| Cinch Consultancy Ltd | Professional & scientific | 2011 |
| Cinctus Ltd | Professional & scientific | 2020 |
| Cinderra Edge Limited | Administrative & support | 2025 |
| Cinema @ 3 ST Peter's Limited | Arts & recreation | 2019 |
| Cinema Screens Cleaning Ltd | Administrative & support | 2014 |
| Cinnamon Pantry Ltd | Wholesale & retail | 2023 |
| Circa Business Solutions Limited | Information & communication | 2007 |
| Circlemedia Limited | Professional & scientific | 2010 |
| Cirrus Health Ltd | Wholesale & retail | 2024 |
| Citadel Business School Ltd | Education | 2021 |
| Citi Point Investments Ltd | Real estate | 2024 |
| Citi Point Properties Ltd | Real estate | 2013 |
| Citizens International (UK) Limited | Professional & scientific | 2022 |
| Citriniti Ventures Ltd | Real estate | 2021 |
| City & County Projects Limited | Real estate | 2008 |
| City Auto Detail Ltd | Wholesale & retail | 2021 |
| City Cars, Bedford Limited | Transport & logistics | 2023 |
| City Law Corporate Limited | Professional & scientific | 2012 |
| City Selling Spot Ltd | Professional & scientific | 2024 |
| City Shopp Ltd | Wholesale & retail | 2024 |
| City View Wheel Co. Ltd | Arts & recreation | 2020 |
| Cityfax Ltd | Wholesale & retail | 2011 |
| Citylake Developments Limited | Real estate | 2002 |
| Cityshapers Ltd | Health & social care | 2022 |
| Cityshapers Properties Ltd | Construction | 2023 |
| Civetta Advisory Services Limited | Professional & scientific | 2020 |
| Civiq AI Ltd | Information & communication | 2026 |
| CIZ Logistics Limited | Transport & logistics | 2026 |
| CJ Paint Spraying Ltd | Professional & scientific | 2022 |
| CJ Plumbing & Heating Services Limited | Wholesale & retail | 2014 |
| CJ White Commercial Finance Ltd | Financial services | 2019 |
| CJ White Mortgages Limited | Financial services | 2017 |
| CJB Composites Limited | Manufacturing | 2013 |
| CJF Change Management Limited | Professional & scientific | 2011 |
| CJL Building Services(Harpenden) Ltd | Construction | 2014 |
| CJO and Seo-Midas Services Ltd | Households | 2024 |
| CJT Advanced CAD Ltd | Professional & scientific | 2024 |
| CK Veterinary Solutions Ltd | Professional & scientific | 2025 |
| Ck&Dk Ltd | Real estate | 2025 |
| CKR Global Limited | Other services | 2017 |
| Cladding Spraying Ltd | Construction | 2023 |
| Cladwinds Limited | Construction | 1988 |
| Claire Flynn Properties Limited | Construction | 2020 |
| Claire Marie Properties Limited | Real estate | 2022 |
| Claire Walton Property Limited | Real estate | 2014 |
| Clapham Cars Ltd | Administrative & support | 2017 |
| Clapham Farms Limited | Real estate | 1945 |
| Clapham Fish & Chips Ltd | Hospitality | 2018 |
| Clapham General Stores Limited | Real estate | 1978 |
| Clarbcb Ltd | Health & social care | 2021 |
| Clare Court Management (St.Ives) Limited | Households | 1965 |
| Clarendon House (Bedford) Management Company | Households | 1988 |
| Clarendon Management Consultants Limited | Administrative & support | 2008 |
| Clarendon Management Limited | Households | 1992 |
| Clarendon Road Property Limited | Hospitality | 2004 |
| Clarion Developments Limited | Other services | 1994 |
| Claris Homes Limited | Health & social care | 2024 |
| Clarity Cosmetics Ltd | Health & social care | 2018 |
| Clarity ICS Ltd. | Information & communication | 2015 |
| Clark Power Limited | Construction | 2025 |
| Clark's Care and Cleaning Serives Ltd | Health & social care | 2021 |
| Clarke Catering Management Limited | Hospitality | 2020 |
| Clarke Plumbing Ltd | Construction | 2021 |
| Clarus Apartments Limited | Hospitality | 2026 |
| Class Clean Exteriors Limited | Other services | 2022 |
| Classic & Modern Paint & Bodywork Limited | Wholesale & retail | 2002 |
| Classic Cars Bedford Ltd | Transport & logistics | 2023 |
| Classic Companionship Ltd | Transport & logistics | 2026 |
| Classplant Limited | Other services | 2001 |
| Classykurd Ltd | Other services | 2023 |
| Claumaria Ltd | Wholesale & retail | 2026 |
| Claybuild Ltd | Construction | 2007 |
| Claydon Court Management Company Limited | Households | 1992 |
| Claydon Holdings Limited | Professional & scientific | 1987 |
| Clayhill Farming Limited | Agriculture & fishing | 2020 |
| Claytons Clothing Limited | Wholesale & retail | 2007 |
| CLB Plumbing Ltd | Manufacturing | 2023 |
| Clean Evolution Ltd | Administrative & support | 2025 |
| Clean Haven Ltd | Administrative & support | 2023 |
| Cleaning NDA Ltd | Administrative & support | 2023 |
| Cleanix Cleaning Bedford Ltd | Administrative & support | 2025 |
| Cleansy Cleaning Solutions Ltd | Other services | 2021 |
| Clear Brew Bedfordshire and Milton Keynes Ltd | Administrative & support | 2015 |
| Clear Cleaning Commercial Limited | Administrative & support | 2020 |