| Consult UK Holdings Limited | Professional & scientific | 2013 |
| Consultancy 100 Limited | Real estate | 2016 |
| Consultancy N/W Ltd | Administrative & support | 2025 |
| Consultant Clinic Limited | Professional & scientific | 2024 |
| Consultant Medical Limited | Health & social care | 2010 |
| Consultantcare Holdings Limited | Administrative & support | 2024 |
| Consultantcare Limited | Health & social care | 2003 |
| Consultantsee Limited | Information & communication | 2013 |
| Consultbiz Ltd | Professional & scientific | 2020 |
| Consultblue Limited | Information & communication | 2013 |
| Consultify Ltd | Information & communication | 2025 |
| Consulting Energy CF Holding Limited | Financial services | 2022 |
| Consultis Limited | Information & communication | 2001 |
| Consultmyapp Limited | Extraterritorial | 2018 |
| Consume Communications Ltd | Professional & scientific | 2016 |
| Consumer and Media Intelligence Ltd | Information & communication | 2007 |
| Consumer Complaints Support Ltd | Administrative & support | 2026 |
| Consumer Connect Ltd | Administrative & support | 2011 |
| Consumer Electricals Limited | Wholesale & retail | 2012 |
| Consumer Energy Solutions Limited | Administrative & support | 2016 |
| Consumer Rights Solicitors Ltd | Administrative & support | 2017 |
| Consumer Wise Ltd | Administrative & support | 2020 |
| Contact Couriers Ltd | Transport & logistics | 2013 |
| Contact Design & Build Limited | Construction | 2015 |
| Contact Events Limited | Arts & recreation | 2020 |
| Contact Labs Group Limited | Professional & scientific | 2021 |
| Contact Pharmacy Direct Ltd | Wholesale & retail | 2024 |
| Contained Air Solutions Limited | Manufacturing | 2007 |
| Container Food Ltd | Hospitality | 2025 |
| Container Sales, Hire & Leasing Limited | Transport & logistics | 2000 |
| Container Stacks Ltd | Information & communication | 2025 |
| Contaso Ltd | Administrative & support | 2016 |
| Contech Solutions Ltd | Construction | 2022 |
| Contempo Music Publishing Limited | Information & communication | 2024 |
| Contemporary Professional Development Ltd | Construction | 2023 |
| Conten Network Ltd | Administrative & support | 2024 |
| Contener Limited | Extraterritorial | 2015 |
| Content Aura Ltd | Other services | 2024 |
| Content Bloom Ltd | Information & communication | 2022 |
| Content Designer / Prompt Engineer Ltd | Administrative & support | 2021 |
| Content Haus Studios Ltd | Professional & scientific | 2022 |
| Content Studio Twenty Two Ltd | Professional & scientific | 2024 |
| Contentbible Limited | Extraterritorial | 2015 |
| Contentbychichi Ltd | Information & communication | 2026 |
| Contentis SPV 1 Limited | Financial services | 2019 |
| Contentology Ltd | Information & communication | 2014 |
| Contenty Ltd | Administrative & support | 2019 |
| Conteur Hair Limited | Other services | 2019 |
| Contextomy Ltd | Wholesale & retail | 2024 |
| Continental International Trading Limited | Extraterritorial | 2026 |
| Continental Recruitment and Staffing Ltd | Administrative & support | 2022 |
| Continental SPICE5 Ltd | Hospitality | 2023 |
| Continental Textiles (Group) Limited | Professional & scientific | 2013 |
| Continental Textiles (Holdings) Limited | Professional & scientific | 2004 |
| Continental Textiles (Manchester) Limited | Wholesale & retail | 1953 |
| Continental Textiles Limited | Professional & scientific | 1997 |
| Continue Cleaning Limited | Administrative & support | 2023 |
| Continuity Desk Ltd | Information & communication | 2025 |
| Continuous Delivery Limited | Information & communication | 2014 |
| Continuum Solutions Ltd | Wholesale & retail | 2026 |
| Contour (GJS) Management Company Limited | Real estate | 2024 |
| Contour Flooring Ltd | Construction | 2021 |
| Contour Manchester Ltd | Real estate | 2024 |
| Contoured Aesthetics Academy Ltd | Other services | 2022 |
| Contra Moto Limited | Manufacturing | 2021 |
| Contract Coding Limited | Administrative & support | 2009 |
| Contract Furnishings Limited | Manufacturing | 2012 |
| Contract Furniture (UK) Ltd | Manufacturing | 2011 |
| Contract ME Ltd | Professional & scientific | 2022 |
| Contract Natural GAS Software Limited | Information & communication | 1997 |
| Contract Services (Renovation & Refurbishing) Ltd | Construction | 1997 |
| Contract Services Holdings Limited | Financial services | 2023 |
| Contract Vehicle Services Limited | Administrative & support | 2005 |
| Contract Vehicle Solutions Ltd | Wholesale & retail | 2023 |
| Contracting Export Company Ltd | Wholesale & retail | 2025 |
| Contractissue Limited | | 1993 |
| Contractor Accommodation Ltd | Hospitality | 2020 |
| Contractor Central Accounting Limited | Professional & scientific | 2014 |
| Contractor Corner Accounting Limited | Professional & scientific | 2007 |
| Contractor for YOU Ltd | Construction | 2020 |
| Contrast Creative Ltd | Information & communication | 2008 |
| Control Gateway Ltd | Wholesale & retail | 2022 |
| Control Xiii Limited | Professional & scientific | 2023 |
| Controlled Solutions Group Limited | Administrative & support | 2002 |
| Controlled Systems Management Limited | Construction | 1999 |
| Controlshift Ltd | Extraterritorial | 2022 |
| CONTROLSWITH365 Limited | Professional & scientific | 2024 |
| Conturve Limited | Other services | 2020 |
| Contxt Media Limited | Professional & scientific | 2023 |
| Convenience Pointe AL Limited | Wholesale & retail | 2018 |
| Convenience Shops (1) Limited | Extraterritorial | 2018 |
| Convenience Shops (2) Limited | Extraterritorial | 2018 |
| Convenience Stores UK (Blackley) Ltd | Wholesale & retail | 2023 |
| Convenience Stores UK (Manchester) Limited | Wholesale & retail | 2011 |
| Convenient Group Ltd | Wholesale & retail | 2020 |
| Convenitis Limited | Construction | 2014 |
| Converge I/O Limited | Information & communication | 2023 |
| Converged Network and Security Solutions Ltd | Information & communication | 2010 |
| Convergence Hub Limited | Hospitality | 2025 |
| Convergence Tech Solutions Ltd | Information & communication | 2025 |