| Classy Glass & Awards Limited | Other services | 2002 |
| Classy Hippy Limited | Wholesale & retail | 2009 |
| Claudia Lash & Aesthetic Ltd | Other services | 2025 |
| Claverton Estates Ltd. | Real estate | 1999 |
| Claverton Healthcare Limited | Real estate | 2008 |
| Claverton Holdings Limited | Professional & scientific | 2000 |
| Claverton Homes Limited | Construction | 2023 |
| Clavra Limited | Information & communication | 2025 |
| Clawtech Electrical Ltd | Construction | 2011 |
| Clay Green Farm Management Company Limited | Households | 2022 |
| Clay Mcguire Executive Limited | Administrative & support | 2010 |
| Clay Mcguire Holdings Limited | Real estate | 2023 |
| Clay Shed Limited | Arts & recreation | 2018 |
| Clay Technology Ltd | Professional & scientific | 2020 |
| Claydines Hospitality Limited | Hospitality | 2019 |
| Claydsever Limited | Administrative & support | 2021 |
| Clayfield Lansdown Homes Ltd | Real estate | 2026 |
| Clayfields FM Limited | Construction | 2022 |
| Clayton & Company Interiors Ltd | Professional & scientific | 2004 |
| Clayton Burbidge Carpentry & Joinery Limited | Administrative & support | 2016 |
| Clayton Cars Bristol Limited | Wholesale & retail | 2015 |
| Clayton Euro Risk Limited | Professional & scientific | 1997 |
| Clayton Holdings UK Limited | Professional & scientific | 2007 |
| Clayton Systems Consultancy Ltd | Professional & scientific | 2019 |
| Clayton-Psychology Ltd | Education | 2018 |
| Claywell Digital Ltd | Information & communication | 2022 |
| CLC Properties SC Limited | Real estate | 2022 |
| CLD 87 Transport Ltd | Transport & logistics | 2022 |
| Clean and Clear South West Ltd | Administrative & support | 2012 |
| Clean AS a JEM Limited | Administrative & support | 2017 |
| Clean Bees Cleaning Ltd | Administrative & support | 2020 |
| Clean Bidco Limited | Manufacturing | 2019 |
| Clean Blue Consulting Limited | Professional & scientific | 2022 |
| Clean Blue Limited | Professional & scientific | 2015 |
| Clean Bristol Ltd | Administrative & support | 2025 |
| Clean Care Companion Limited | Administrative & support | 2023 |
| Clean Clifton Ltd | Administrative & support | 2022 |
| Clean Concrete UK Ltd | Manufacturing | 2021 |
| Clean Energy Advisors Ltd | Administrative & support | 2021 |
| Clean Energy Prospector Ltd | Manufacturing | 2008 |
| Clean Flamingos (Commercial Launderette) Ltd | Other services | 2023 |
| Clean House Bristol Ltd | Administrative & support | 2023 |
| Clean Line Plastering Ltd | Construction | 2016 |
| Clean Midco Limited | Manufacturing | 2019 |
| Clean Neat Ltd | Administrative & support | 2026 |
| Clean Tech Cleaning Services Limited | Administrative & support | 2025 |
| Clean Topco Limited | Manufacturing | 2019 |
| Clean-Touch Drylinning Limited | Construction | 2018 |
| Cleaner Supreme 2 Limited | Administrative & support | 2026 |
| Cleaning Solution Bristol Ltd | Administrative & support | 2020 |
| Cleaning With Yink Limited | Real estate | 2023 |
| Cleanlink UK Ltd | Administrative & support | 2025 |
| Cleanop Ltd | Wholesale & retail | 2025 |
| Cleansense Ltd | Extraterritorial | 2025 |
| Cleansheen Limited | Other services | 2008 |
| Cleanstream Group Limited | Financial services | 2021 |
| Cleansweep Bristol Ltd | Wholesale & retail | 2026 |
| Cleantech Talent Limited | Administrative & support | 2022 |
| Cleanwell Limited | Administrative & support | 2018 |
| Cleanzilla Ltd | Professional & scientific | 2021 |
| Clear & Colour PPF Ltd | Wholesale & retail | 2023 |
| Clear 2 SEE Limited | Construction | 2017 |
| Clear AS Day Productions Ltd | Information & communication | 2019 |
| Clear Design UK Limited | Arts & recreation | 2002 |
| Clear Future Architecture Limited | Professional & scientific | 2011 |
| Clear Narrative Media Ltd | Information & communication | 2021 |
| Clear Path Investments Limited | Real estate | 2015 |
| Clear Property Development Ltd | Real estate | 2017 |
| Clear Sky Construction Bristol Ltd | Construction | 2023 |
| Clear Square Property Ltd | Real estate | 2024 |
| Clear UP Bristol Ltd | Water & waste | 2021 |
| Clear View Courses Limited | Information & communication | 2017 |
| Clear Water Revival Limited | Construction | 2008 |
| Clear Words Marketing Limited | Professional & scientific | 2015 |
| Clearance Brothers Ltd | Wholesale & retail | 2025 |
| Clearbin Waste Limited | Water & waste | 2026 |
| Clearcube Consulting Limited | Administrative & support | 2006 |
| Clearenergy Limited | Professional & scientific | 2003 |
| Cleargain Limited | Households | 1986 |
| Clearlead Consulting Limited | Professional & scientific | 2014 |
| Clearo Ltd | Wholesale & retail | 2020 |
| Clearorbit Limited | Financial services | 2005 |
| Clearpath Consultancy Group Limited | Professional & scientific | 2025 |
| Clearpath Security Services Ltd | Administrative & support | 2026 |
| Clearpeak Limited | Construction | 2016 |
| Clearquick UK Ltd | Water & waste | 2010 |
| Clearskyz Music Ltd | Information & communication | 2010 |
| Clearspirit Ltd | Professional & scientific | 2005 |
| Cleartalk Telecoms Limited | Information & communication | 2017 |
| Cleartone Finance Services Limited | Extraterritorial | 2009 |
| Cleartone Solutions Limited | Extraterritorial | 2009 |
| Cleartone Telecomms Limited | Extraterritorial | 2009 |
| Cleartone UK Limited | Extraterritorial | 2009 |
| Clearview Contract Cleaning Limited | Administrative & support | 2002 |
| Clearview Future Limited | Financial services | 2025 |
| Clearview Property Development Limited | Construction | 2016 |
| Clearview Recruitment Limited | Administrative & support | 2014 |
| Clearview Recruitment South Limited | Administrative & support | 2024 |
| Clearwater Heating Supplies Ltd | Extraterritorial | 2018 |
| Clearways Chimney & Fire Services Ltd | Construction | 2000 |