| Club Draws Limited | Enniskillen | 2022 |
| Club Enclosures Limited | Basildon | 2025 |
| Club International Limited | | 2004 |
| Club KO Ltd | Buckhurst Hill | 2015 |
| Club Meditation Ltd | Woking | 2023 |
| Club Mint Limited | Billericay | 2024 |
| Club Mulholland Limited | Farnborough | 2013 |
| Club NO 8 Ltd | London | 2020 |
| Club Node Ltd | London | 2023 |
| Club Olympus Trustees Limited | Altrincham | 2009 |
| Club Power Elite Limited | Salford | 2018 |
| Club Racing UK Ltd | Eastleigh | 2023 |
| Club Radicool Ltd | Market Drayton | 2024 |
| Club Redd Ltd | Nottingham | 2025 |
| Club Select Limited | Manchester | 2002 |
| Club Skin Ltd | Reading | 2021 |
| Club Sport Ltd | Liverpool | 2003 |
| Club TAN Ltd. | Bristol | 2004 |
| Club Triumph Limited | Solihull | 2003 |
| Club Tropicana Limited | London | 2006 |
| Club Veloce Ltd | London | 2022 |
| Club Venturo Ltd | London | 2025 |
| Club Venus Limited | Sheffield | 2018 |
| Club VIP Plus Limited | London | 2017 |
| Club Wellbeing Ltd | London | 2025 |
| Club Yoga Limited | Rugby | 2024 |
| Club-Alert Ltd | Bury | 2017 |
| CLUB19 Ltd | Crawley | 2019 |
| Clubclick Limited | London | 2018 |
| Clubhouse Nico Ltd | Beverley | 2024 |
| Clubhub Poole Ltd | Poole | 2020 |
| Clubland Playscheme Ltd | Walton-On-Thames | 2006 |
| Clubluk Ltd | Cheltenham | 2017 |
| Clubmoor Barber Ltd | Liverpool | 2025 |
| Clubtan Home Street Ltd | Edinburgh | 2018 |
| Clue Adventures Limited | Epsom | 2016 |
| Clued Community Interest Company | Bury St. Edmunds | 2021 |
| Cluff & Sons Ltd | Dover | 2016 |
| Clumber Consultancy Limited | Mansfield | 2014 |
| Clumber Trustee Company Limited | Winchester | 2005 |
| Clunie Clinque Limited | Crieff | 2025 |
| Cluny Events Limited | Inverurie | 2016 |
| Cluster Cabaret Limited | Potters Bar | 2026 |
| Cluster Church Limited | Walton-On-Thames | 2024 |
| Clutch Competitions Ltd | London | 2023 |
| Clutter-B-Gone Ltd | Rochester | 2023 |
| Cluttons Employees Limited | London | 2014 |
| CLV Communities Limited | Manchester | 2012 |
| CLV Management Ltd | Liverpool | 2025 |
| CLW Beauty Limited | Southend-On-Sea | 2012 |
| CLW Event Design Limited | Rochford | 2020 |
| Clwb Carco Limited | Cardiff | 2008 |
| Clwb Fitness Ltd | Amlwch | 2023 |
| Clwb IMY CIC | Machynlleth | 2023 |
| Clwyd Agencies Limited | St Asaph | 2011 |
| Clwyd Bakeries Ltd | Holywell | 2019 |
| Clwyd Canines Limited | Prestatyn | 2025 |
| Clwyd Fire Protection Limited | Rhuddlan | 2008 |
| Clwyd Swimming Pools Limited | Kinmel Bay, Rhyl | 1979 |
| Clwyd Veteran and Vintage Machinery Society Limited | Wrexham Industrial Estate | 1999 |
| Clybiau Plant Cymru Kids' Clubs | Cardiff | 2001 |
| Clyde Barber Ltd | Clydebank | 2026 |
| Clyde Care (UK Solutions) CIC | Glasgow | 2017 |
| Clyde Cleaners Limited | Clydebank | 2017 |
| Clyde Coast MS Therapy Centre Ltd. | Aberdeen | 1992 |
| Clyde Computers Southern Limited | Swindon | 1997 |
| Clyde Consultancy & Services Ltd | Barking | 2022 |
| Clyde Court Management Limited | Manchester | 2001 |
| Clyde Elegance Ltd | Glasgow | 2025 |
| Clyde Ground Investigation Limited | Glasgow | 2021 |
| Clyde Health & Wellbeing Ltd | Glasgow | 2025 |
| Clyde Heating Solutions Ltd | Glasgow | 2020 |
| Clyde Kitchens & Bathrooms Ltd | Airdrie | 2021 |
| Clyde Shopmobility | Clydebank | 2003 |
| Clyde Valley Community Church (Cvcc) | East Kilbride | 2005 |
| Clyde Valley Fuels Ltd | Motherwell | 2018 |
| Clydebank Car Wash Limited | Clydebank | 2022 |
| Clydebank Fadecut Ltd | Clydebank | 2024 |
| Clydebank Style Ltd | Clydebank | 2020 |
| Clydecentral Services Ltd | Falkirk | 2020 |
| Clydesdale Citizens Advice Bureau | South Lanarkshire | 2004 |
| Clyo Ltd | Essex | 2025 |
| CM Aberdeen Limited | Aberdeen | 2023 |
| CM Academy Limited | Herne Bay | 2023 |
| CM Aesthetic Ltd | London | 2012 |
| CM Aesthetic Studio Ltd. | Edinburgh | 2024 |
| CM Aesthetics & Beauty Ltd | London | 2026 |
| CM Auto Service Ltd | Birmingham | 2015 |
| CM Barbers Ltd | Port Glasgow | 2025 |
| CM Basildon Limited | Basildon | 2010 |
| CM Beauty Studio Ltd | Nuneaton | 2025 |
| CM Brent London Ltd | London | 2022 |
| CM Building Ltd | Cockfosters | 2023 |
| CM Charterhouse Associates Trustees Limited | Glasgow | 2014 |
| CM Communications Online Ltd | High Wycombe | 2020 |
| CM Consolidated Limited | London | 2010 |
| CM Cosmetics Ltd | Cambridge | 2024 |
| CM Cube Ltd | Glasgow | 2018 |
| CM Decorating Limited | Peterborough | 2013 |
| CM Delta Ltd | London | 2011 |