| Cullys Gym Limited | Hockley | 2010 |
| Culmore Studios Ltd | London | 2023 |
| Cult Classic Tattoo Limited | Hornchurch | 2011 |
| Cult Conditioning Ltd | Bradford | 2024 |
| Cult Couture Clothing Limited | Billericay | 2024 |
| Cult Entertainment Ltd | London | 2024 |
| Cult of Fashion Ltd | London | 2013 |
| Cult of Fitness Ltd | Warrington | 2017 |
| Cult of YA Limited | London | 2015 |
| Culter Amateur Sports (Training, Leisure and Education) Limited | | 2002 |
| Culter Community FC Ltd | Peterculter | 2025 |
| Culter Community Football Club CIC | Peterculter | 2025 |
| Cultivate Artists Studio CIC | London | 2023 |
| Cultivate Conditioning Limited | Glasgow | 2024 |
| Cultivate Fitness Ltd | Marlow | 2021 |
| Cultlab Limited | Caterham | 2022 |
| Cultmag Ltd | Chelmsford | 2024 |
| Cultplex MCR Ltd | Manchester | 2023 |
| CULTUR3 Limited | Birmingham | 2025 |
| Cultura Cura Ltd | Brighton | 2025 |
| Cultural Arts Network UK Ltd | London | 2026 |
| Cultural Associates Oxford Limited | London | 2019 |
| Cultural Canvas Limited | London | 2025 |
| Cultural Development North East CIC | Sunderland | 2023 |
| Cultural Entertainment and Creative Development Co., Ltd | Rubery | 2025 |
| Cultural Forum for the Bath Area C.I.C. | Bath | 2012 |
| Cultural Freelancers CIC | Gateshead | 2020 |
| Cultural Games Association UK | London | 2023 |
| Cultural Impact Ltd. | Eastleigh | 2009 |
| Cultural Saturday Limited | London | 2023 |
| Cultural Voice Forum CIC | Bradford | 2026 |
| Culturavault CIC | Enfield | 2025 |
| Culture Access CIC | London | 2016 |
| Culture Calendar Limited | Ormskirk | 2022 |
| Culture Code Ltd | Tamworth | 2023 |
| Culture Collective WW Limited | London | 2023 |
| Culture Coventry | Coventry | 2013 |
| Culture Coventry Ventures Limited | Coventry | 2004 |
| Culture CUP Limited | London | 2025 |
| Culture Inc Limited | Haltwhistle | 2014 |
| Culture INK Ltd | Glasgow | 2022 |
| Culture North East Ltd | Aberdeen | 2025 |
| Culture of Habit Ltd | Brough | 2026 |
| Culture Perth and Kinross Limited | Perth | 2015 |
| Culture Project | London | 2016 |
| Culture Stream Limited | Banbury | 2020 |
| Cultured Fitness Ltd | Wigan | 2025 |
| Culturepot Global Limited | Stanmore | 2010 |
| Culturepublica Ltd | East Molesey | 2015 |
| Cultureserve Limited | Kirkby Stephen | 2024 |
| Culturlann Mcadam O Fiaich | Béal Feirste | 2011 |
| Culturunners C.I.C. | London | 2016 |
| Cultvr Ltd | Cardiff | 2023 |
| Cultybraggan Fitness Limited | Crieff | 2023 |
| Cumann Culturtha Mhic Reachtain | Belfast | 2002 |
| Cumberland and Westmorland Wrestling Association Limited | Carlisle | 2004 |
| Cumberland Clay Shooting Ground Ltd | Lichfield | 2018 |
| Cumberland Football Association Limited | Cockermouth | 2000 |
| Cumberland Lawn Tennis Ground Limited,(The) | London | 1922 |
| Cumberland Sporting Car Club Limited | Carlisle | 1981 |
| Cumberland Sports Village Limited | Ellesmere Port | 2023 |
| Cumberland Strongman Academy Ltd | Workington | 2024 |
| Cumbernauld Colts Football Club (2017) Ltd | Airdrie | 2017 |
| Cumbernauld Rugby Football and Sports Club Limited | Glasgow | 1978 |
| Cumbernauld Theatre Trust Limited | Cumbernauld | 1978 |
| Cumbrae Promotions Limited | Surbiton | 2016 |
| Cumbria Blinds (NW) Ltd. | Carlisle | 2020 |
| Cumbria Building Preservation Trust Limited | Nelson | 1977 |
| Cumbria Canine Park Ltd | Egremont | 2026 |
| Cumbria Canine Services Ltd | Penrith | 2024 |
| Cumbria Classic Motocross Limited | Wigton | 2020 |
| Cumbria Classic Racing Motorcycle Club Ltd | Wigton | 2014 |
| Cumbria Coaching Success Limited | Kendal | 2016 |
| Cumbria Combat Sports Limited | Ulverston | 2022 |
| Cumbria County Cricket Club Limited | Ulverston | 2020 |
| Cumbria Cricket Limited | Barrow In Furness | 2011 |
| Cumbria Football Academy Ltd | Carlisle | 2018 |
| Cumbria Golf Centre Limited | Cockermouth | 2009 |
| Cumbria Kart Racing Club Limited | Dalton-In-Furness | 1997 |
| Cumbria Moto Park Ltd | Wigton | 2026 |
| Cumbria Pole Art Limited | Holywell | 2014 |
| Cumbria Rugby Union Referees Limited | Workington | 2018 |
| Cumbria Sporting GUN Ltd | Kirkby Stephen | 2015 |
| Cumbria Steam & Vintage Vehicle Society Limited | Penrith | 1974 |
| Cumbria Theatre Trust | Keswick | 1984 |
| Cumbria Wildlife Park Ltd | Doncaster | 2025 |
| Cumbria Wildlife Trust Limited | Kendal | 1962 |
| Cumbria ZOO Company Limited | Tebay | 2016 |
| Cumbrian Kayaking Ltd | Carnforth | 2017 |
| Cumbrian Punk Limited | Potters Bar | 2013 |
| Cumbrian Rover Owners Club (N.W.) Limited | Cumbria | 1983 |
| Cumbriavag Limited | Kendal | 2013 |
| Cummings O'Neill Limited | Newtownabbey | 2016 |
| Cummins Vivisection Technologies Limited | London | 2026 |
| Cumnock & District Leisure Group | Cumnock | 1999 |
| Cumulus Outdoor Events Limited | Swanage | 2009 |
| Cumulus Productions UK Limited | London | 2020 |
| Cunarder Locomotive Group Limited | St Albans | 2025 |
| Cunliffe Productions Limited | York | 1998 |
| Cunning FOX Productions Limited | London | 2020 |