| Cozac ANT Construction Ltd | Construction | 2025 |
| Cozmaa Limited | Construction | 2026 |
| Cozmo Realty Ltd | Real estate | 2025 |
| CP Coaching 121 Ltd | Arts & recreation | 2024 |
| CP Ships (UK) Limited | Transport & logistics | 1985 |
| CP Sweeney Homes Ltd | Real estate | 2021 |
| Cpci Ltd | Wholesale & retail | 2020 |
| CPH Dream Properties Ltd | Real estate | 2025 |
| Cpjm Ltd | Real estate | 2018 |
| CPS (Luton) Ltd | Wholesale & retail | 2009 |
| CQC Group Ltd | Administrative & support | 2021 |
| CR Clean Limited | Administrative & support | 2019 |
| Craft & Kind Ltd | Wholesale & retail | 2025 |
| Craft Chauffeur Drive Ltd | Transport & logistics | 2026 |
| Crafted Designer Limited | Wholesale & retail | 2025 |
| Crafti Spirit Ltd | Information & communication | 2013 |
| Craftique Fusion Limited | Manufacturing | 2025 |
| Craftora Outfit Limited | Wholesale & retail | 2026 |
| Cranfield Aviation Training School Limited | Education | 2002 |
| Crannull Consulting Ltd | Administrative & support | 2010 |
| Crave Corner Luton Ltd | Hospitality | 2026 |
| Cravingz Ltd | Hospitality | 2026 |
| Crawley Liquor Mart Ltd | Wholesale & retail | 2026 |
| Crawley Properties Ltd | Real estate | 2019 |
| Crawtech Limited | Manufacturing | 2018 |
| Craydon Lifts & Electrical Limited | Manufacturing | 2013 |
| Craze Code LAB Ltd | Information & communication | 2024 |
| Crazy Tyres Tunbridge Wells Ltd | Wholesale & retail | 2022 |
| CRC Homes Limited | Real estate | 2018 |
| CRE8 Business World Ltd | Hospitality | 2018 |
| CRE8 Film Productions Limited | Information & communication | 2025 |
| CRE8 Self Storage Limited | Transport & logistics | 2010 |
| Cream-A-Licious Ltd | Hospitality | 2025 |
| Create and Communicate With Rochelle Ltd | Health & social care | 2020 |
| Create Content Studios Ltd | Professional & scientific | 2024 |
| Creating Memories Specialist Holiday Lets Ltd | Hospitality | 2019 |
| Creations by RS Ltd | Wholesale & retail | 2025 |
| Creative Beehive Ltd | Professional & scientific | 2016 |
| Creative Beginnings CIC | Hospitality | 2018 |
| Creative Business Videos Ltd | Information & communication | 2019 |
| Creative Clarity Consultancy Ltd | Administrative & support | 2024 |
| Creative CONSTRUCTION4U Ltd | Construction | 2024 |
| Creative Cuts Studios Ltd | Information & communication | 2024 |
| Creative Driveways Oxfordshire Ltd | Administrative & support | 2025 |
| Creative Education Luton Ltd | Education | 2016 |
| Creative Intellectual Alliance Ltd | Information & communication | 2006 |
| Creative Jewellery Co Limited | Wholesale & retail | 2022 |
| Creative Plug Ltd | Manufacturing | 2018 |
| Creative Sky Co Ltd | Wholesale & retail | 2021 |
| Creative Vision Luton Limited | Information & communication | 2011 |
| Creative Widgets Ltd | Information & communication | 2024 |
| CREATIVE8 Holdings Ltd | Financial services | 2020 |
| CREATIVE8 Limited | Manufacturing | 2008 |
| Creativelimit Studio Limited | Information & communication | 2026 |
| Credit Montague Limited | Professional & scientific | 1905 |
| Crees Planning Solution Ltd | Professional & scientific | 2023 |
| Creolite Technologies Ltd | Information & communication | 2023 |
| Crescent Catering Bedfordshire Ltd | Hospitality | 2023 |
| Crescent Hall Events Ltd | Hospitality | 2013 |
| Crescent Kitchen Ltd | Hospitality | 2025 |
| Crescent Light CIC | Education | 2026 |
| Crescent Rise Property Ltd | Households | 2017 |
| Crescent Services Ltd | Wholesale & retail | 2021 |
| Crescent Star Builders Ltd | Construction | 2020 |
| Crescent Summer School Community Interest Company | Arts & recreation | 2019 |
| Crescent Travel Management Limited | Professional & scientific | 2013 |
| Cressi Vastelle Limited | Other services | 2019 |
| Cresst Limited | Professional & scientific | 2018 |
| Crest Compass Ltd | Administrative & support | 2014 |
| Crest Consulting Services Ltd | Administrative & support | 2020 |
| Crestline Networks Ltd | Information & communication | 2025 |
| Crestoak Investments Limited | Financial services | 2012 |
| Crestoak Medical Investments Ltd | Real estate | 2010 |
| Crestone Estates Limited | Real estate | 2026 |
| Crestpark Investments Ltd | Real estate | 2021 |
| Crestview Dartford Homes Ltd | Construction | 2025 |
| Crestview Homes (Leagrave) Ltd | Construction | 2025 |
| Crestview Homes Ltd | Construction | 2023 |
| Crestview(Beale Street) Ltd | Construction | 2025 |
| Crete Acquisitions Limited | Real estate | 2025 |
| Cretu Paula Limited | Transport & logistics | 2018 |
| Crevice Solutions Ltd | Information & communication | 2016 |
| Crew Star Ltd | Wholesale & retail | 2016 |
| Crewnix Ltd | Administrative & support | 2025 |
| CRG Residential Ltd | Construction | 2020 |
| CRG Services Ltd | Wholesale & retail | 2025 |
| Cricket First Choice Limited | Professional & scientific | 2010 |
| Cricket Plus Limited | Arts & recreation | 2010 |
| Crimson Catz LLP | | 2010 |
| Crimson Sky Media Ltd | Professional & scientific | 2024 |
| Cris HGV Ltd | Transport & logistics | 2019 |
| Crisis AID Limited | Other services | 2022 |
| Crispins Limited | Hospitality | 2025 |
| Crispy (UK) Ltd | Wholesale & retail | 2010 |
| Crispy Chicken & Pizza Express Ltd | Hospitality | 2022 |
| Crissconstruct Limited | Construction | 2021 |
| Crissis Services Ltd | Transport & logistics | 2015 |
| Cristi & Cristi Ltd | Construction | 2015 |
| Cristiana Cleaning Services Ltd | Administrative & support | 2021 |
| Cristiayan Ltd | Transport & logistics | 2024 |