| Clarityx Limited | London | 2026 |
| Clarivue Beauty Ltd | London | 2025 |
| Clark & SON Electrical Service Limited | Milton Keynes | 2001 |
| Clark and Brown Ltd | Dunstable | 2023 |
| Clark Collective Ltd | London | 2026 |
| Clark Family Law Ltd | Leeds | 2018 |
| Clark Marine Services Ltd | Newcastle Upon Tyne | 2024 |
| Clark Pearson Funeral Directors Limited | Newcastle Upon Tyne | 2023 |
| Clark's Group Limited | Derby | 2018 |
| Clarke & Co Accountants Ltd | London | 2025 |
| Clarke & Jones Ltd | Manchester | 2017 |
| Clarke & SON Transport Ltd | Liversedge | 2017 |
| Clarke and Carter Hamble Limited | Ruislip, | 2026 |
| Clarke Creates Ltd | Liverpool | 2021 |
| Clarke Cunningham Tree Maintenance Limited | Belfast | 1999 |
| Clarke Development Services Ltd | Birmingham | 2022 |
| Clarke Events (England) Limited | Worcester | 2017 |
| Clarke Group Finance Limited | Epping | 2019 |
| Clarke Property Cleaning Ltd | Glasgow | 2017 |
| Clarke Robinson Retirement Planning Ltd | Bristol | 2022 |
| Clarke's Barks Ltd | Liverpool | 2023 |
| Clarke's Sword Limited | London | 2012 |
| Clarkes Cleaning Ltd | Hornchurch | 2025 |
| Clarkestone Limited | Warrington | 2018 |
| Clarkhill Grooming Services Limited | Swanley | 2008 |
| Clarkia UK Limited | Enfield | 2023 |
| Clarkmj Services Ltd | London | 2025 |
| Clarks Castle Hire Ltd | Exeter | 2017 |
| Clarks Hill Kennels & Cattery Limited | Chorley | 2006 |
| Clarks Jewellery Repairs Ltd | Hull | 2024 |
| Clarks MOT Centre Limited | Leigh On Sea | 2017 |
| Clarks of Nairn Ltd | Nairn | 2010 |
| Clarks Watch Repairs Ltd | Hull | 2023 |
| Clarkson Alliance Project Management Limited | Kidlington | 2018 |
| Clarkson Guthrie Limited | Edinburgh | 2010 |
| Clarkson Overseas Shipbroking Limited | London | 1966 |
| Clarkson's Independent Funeral Directors Ltd | Bath | 2013 |
| Clarksons Futures Limited | London | 1995 |
| Clarksons Memorials Ltd | Rotherham | 2013 |
| Clarkston Beauty Ltd | Larkhall | 2015 |
| Clarkston Controls Limited | Manchester | 2012 |
| Clarkston Hair Co Limited | Hamilton | 2012 |
| Clarkston Nails Ltd | Glasgow | 2026 |
| Clark’S Barbershop Limited | Wantage | 2024 |
| Clark’S Cutting Services Ltd | Bracknell | 2026 |
| Claro Bees Limited | Ripon | 2010 |
| Claroma Beauty Ltd | Motherwell | 2025 |
| Clart Limited | Aylesbury | 2024 |
| Clarus (UK) Ltd | Bradford | 2012 |
| Clarus Mind Coaching Ltd | Bo'Ness | 2025 |
| Claryty Mind Ltd | Manchester | 2026 |
| Clash Motion Ltd | Brighton | 2019 |
| Clasp NGO Ltd | London | 2025 |
| Class & Style Ltd | Edgware | 2025 |
| Class 1 DRY Cleaners Ltd | Winchester | 2025 |
| Class a CUT Ltd | Glasgow | 2026 |
| Class A1 Ltd | Tilbury | 2020 |
| Class Above Ltd | Mansfield | 2025 |
| Class ACT Hair Limited | Derby | 2018 |
| Class Barber (SW) Ltd | Plymouth | 2022 |
| Class Barber One Limited | Gravesend | 2025 |
| Class Barbers Haywards Heath Ltd | Bolney | 2019 |
| Class Barbers Kent Limited | Dartford | 2025 |
| Class Barbers Ltd | Hayward Heath | 2017 |
| Class Beauty Ltd | Manchester | 2025 |
| Class Beauty Whitington Ltd | Manchester | 2026 |
| Class by Sonila Ltd | Banbury | 2017 |
| Class C Ltd | Nantwich | 2025 |
| Class Clean Exteriors Limited | Bedford | 2022 |
| Class Corner UK Ltd | London | 2024 |
| Class CUT Barber Ltd | Bury | 2020 |
| Class CUT Barbers Gents Ltd | Darlington | 2025 |
| Class CUT Barbers Shop Limited | Manchester Road | 2024 |
| Class CUT Warrington Ltd | Warrington | 2024 |
| Class Cuts 40 Ltd | Chorley | 2026 |
| Class Cuts Barbers Ltd | Darlington | 2018 |
| Class Cuts Ltd | Royston | 2009 |
| Class Ealing Ltd | London | 2015 |
| Class Hair Salon Ltd | Manchester | 2019 |
| Class Hairdresser Ltd | London | 2022 |
| Class Hairstyle Ltd | Bridgwater | 2021 |
| Class LB Ltd | Leighton Buzzard | 2021 |
| Class of Cuts Limited | South Croydon | 2015 |
| Class Representatives Network CIC | Runcorn | 2023 |
| Class Stamford Limited | London | 2021 |
| Class Style Ltd | Stockport | 2026 |
| Class Sync Ltd | Glasgow | 2023 |
| Classbento Limited | Newcastle | 2020 |
| Classeys Salon Ltd | Leyland | 2022 |
| Classic & Professional Ltd | Reading | 2025 |
| Classic & Sportscar (Holdings) Limited | Malton | 1997 |
| Classic AG Ltd | New Malden | 2023 |
| Classic Alton Ltd | Alton | 2024 |
| Classic and Camper Ltd | Manchester | 2020 |
| Classic and Vintage Vehicle Hire Ltd | Nottingham | 2017 |
| Classic Barber 1 Ltd | Birmingham | 2025 |
| Classic Barber 2BW Ltd | Shrewsbury | 2025 |
| Classic Barber Ashford Ltd | Ashford | 2019 |
| Classic Barber Dihat Limited | Millom | 2025 |
| Classic Barber Liverpool Ltd | Prescot | 2023 |