| Clarity Collective Consultancy Ltd | Information & communication | 2026 |
| Clarity Contractors UK Limited | Professional & scientific | 2016 |
| Clarity Counsel Limited | Professional & scientific | 2020 |
| Clarity Counselling & Psychotherapy Limited | Health & social care | 2022 |
| Clarity DH Ltd | Professional & scientific | 2026 |
| Clarity Euro Systems Ltd | Professional & scientific | 2025 |
| Clarity Gazebo Limited | Manufacturing | 1969 |
| Clarity Group Limited | Manufacturing | 1989 |
| Clarity Hearing Ltd | Wholesale & retail | 2006 |
| Clarity Jewellery UK Ltd | Wholesale & retail | 2018 |
| Clarity Lifestyle Consulting Ltd | Other services | 2025 |
| Clarity Mental Health Ltd | Health & social care | 2025 |
| Clarity MV Ltd | Administrative & support | 2025 |
| Clarity Office Supplies Limited | Manufacturing | 1975 |
| Clarity PR Ltd | Professional & scientific | 2013 |
| Clarity Print Limited | Manufacturing | 1989 |
| Clarity Training Ltd | Education | 2025 |
| Clarity Writing Ltd | Professional & scientific | 2019 |
| Clarityco Ltd | Health & social care | 2023 |
| Claritylandscapes Ltd | Administrative & support | 2024 |
| Claritywide Ltd | Information & communication | 2012 |
| Clark & Deen Taxpro Limited | Professional & scientific | 2014 |
| Clark & Timms Limited | Wholesale & retail | 2013 |
| Clark Darby & Goodare Limited | Professional & scientific | 2024 |
| Clark Homes & Developments Ltd | Real estate | 2022 |
| Clark Property Solutions Ltd | Construction | 2008 |
| Clarke & Co. (Sutton Coldfield) Limited | Real estate | 1935 |
| Clarke & Evans Service Centre Limited | Wholesale & retail | 2011 |
| Clarke Artists Limited | Arts & recreation | 2010 |
| Clarke Commercial Cleaning Ltd | Administrative & support | 2015 |
| Clarke Development Services Ltd | Other services | 2022 |
| Clarke Forde Godwin Ltd | Professional & scientific | 2022 |
| Clarke Gower Limited | Professional & scientific | 2009 |
| Clarke Groundworks and Landscaping Ltd | Construction | 2024 |
| Clarke Opticians Limited | Wholesale & retail | 2007 |
| Clarke Plastering Limited | Construction | 2025 |
| Clarke Properties (UK) Ltd | Real estate | 2007 |
| Clarke Residential Collective Ltd | Real estate | 2025 |
| Clarke Warner Ltd | Arts & recreation | 2017 |
| Clarke West LLP | | 2009 |
| Clarke's Maintenance Ltd | Manufacturing | 2018 |
| Clarkes Group Travel Ltd | Transport & logistics | 2026 |
| Clarkes Haulage Ltd | Transport & logistics | 2025 |
| Clarkes Investment Properties Ltd | Real estate | 2023 |
| Clarkes Nckm Ltd | Professional & scientific | 2011 |
| Clarkes Rckm Limited | Professional & scientific | 2002 |
| Clarkes Travel Group Ltd | Transport & logistics | 2017 |
| CLARKES.RECOVERY247 Ltd | Water & waste | 2017 |
| Clarks Courtyard Limited | Real estate | 2008 |
| Clarus Global Limited | Administrative & support | 2011 |
| Clarus Housing Ltd | Hospitality | 2025 |
| Clarydon Electronic Services Limited | Manufacturing | 1997 |
| Clarydon Properties Limited | Real estate | 2025 |
| Class ACT Theatrix Limited | Arts & recreation | 2017 |
| Class Cover Management Limited | Households | 1975 |
| Class Ross Construct Limited | Construction | 2023 |
| Classic 500 Cars Limited | Wholesale & retail | 2018 |
| Classic Barber 1 Ltd | Other services | 2025 |
| Classic Canton 18 Ltd | Hospitality | 2019 |
| Classic Citrus Limited | Real estate | 2018 |
| Classic Citrus Medical Limited | Health & social care | 2019 |
| Classic Citrus Properties Limited | Real estate | 2021 |
| Classic Cleaning Contracts Limited | Administrative & support | 2025 |
| Classic Content Limited | Administrative & support | 2016 |
| Classic Cuisine (Midlands) Limited | Manufacturing | 2003 |
| Classic Cuts Barbers Ltd | Other services | 2024 |
| Classic Cuts Developments Limited | Real estate | 2025 |
| Classic Diamonds Holdings Limited | Wholesale & retail | 2026 |
| Classic Diamonds Limited | Wholesale & retail | 2001 |
| Classic Emblem Badges Ltd | Wholesale & retail | 2021 |
| Classic Facilities Management Ltd | Construction | 2023 |
| Classic Fish and Chips Ltd | Hospitality | 2026 |
| Classic Fish Bar (Kingstanding) Limited | Hospitality | 2019 |
| Classic Food Services Ltd | Hospitality | 2013 |
| Classic Fryer Ltd | Hospitality | 2024 |
| Classic Label House Limited | Wholesale & retail | 2025 |
| Classic Loom Limited | Wholesale & retail | 2025 |
| Classic Marquees of Malvern Limited | Administrative & support | 2003 |
| Classic Motor Cars Limited | Wholesale & retail | 1993 |
| Classic Properties (South West) Holdings Limited | Professional & scientific | 2005 |
| Classic Properties (South West) Limited | Real estate | 1994 |
| Classic Roofing and Building Services (Midlands) Ltd | Construction | 2026 |
| Classic Roofing Maintenance Holdings Limited | Other services | 2017 |
| Classic Roofing Maintenance Limited | Construction | 2014 |
| Classic Shawarma Ltd | Administrative & support | 2019 |
| Classic Shop Ltd | Wholesale & retail | 2025 |
| Classic SN Ltd | Hospitality | 2026 |
| Classic Transport Ltd | Transport & logistics | 2024 |
| Classic Ventilation.Canopy Ltd | Manufacturing | 2022 |
| Classical Comics Limited | Information & communication | 2006 |
| Classical FRY Chelmsley Wood Ltd | Hospitality | 2025 |
| Classical FRY Glebe Ltd | Hospitality | 2021 |
| Classics KH Limited | Hospitality | 2017 |
| Classique Foods UK Ltd | Wholesale & retail | 2025 |
| Classix Limited | Hospitality | 2025 |
| Classy UK Cleaning Company Limited | Real estate | 2024 |
| Claude Transport Ltd | Transport & logistics | 2024 |
| Claudia JAY Consulting Ltd | Information & communication | 2025 |
| Claudie's Club Limited | Arts & recreation | 2019 |
| Claudiu Adam Logistics Ltd | Administrative & support | 2018 |