| Citywest Consultants Limited | Willenhall | 1989 |
| Citywide Financial Partners Limited | Leatherhead | 2003 |
| Citywide Group Holdings Limited | Belfast | 2024 |
| Citywide Investments Limited | London | 2011 |
| Citywide Wealth Ltd | Belfast | 2015 |
| Civco Holdings Ltd | Maghera | 2024 |
| Civetta Limited | Bristol | 2011 |
| Civic Assist Holdings Ltd | Barnet | 2026 |
| Civic Holdings Limited | London | 2019 |
| Civic Plus Limited | Manchester | 2022 |
| Civic Watt Limited | Manchester | 2024 |
| CIVIC306 Limited | Ipswich | 2023 |
| Civicstone Capital Limited | Northwood | 2026 |
| Civil and Marine (Holdings) Limited | Maidenhead | 1993 |
| Civil and Marine Slag Cement Limited | Maidenhead | 1992 |
| Civil Rights First | Dumbarton | 2018 |
| Civil Safety Holdings Ltd | Huntingdon | 2023 |
| Civil Service Insurance Society(The) | Maidstone | 1891 |
| Civilised Group Ltd | Reading | 2011 |
| Civilised Money UK Ltd | Reading | 2011 |
| Civils and Drainage Supplies (Group) Limited | Bellshill | 2017 |
| Civils Care Limited | London | 2024 |
| Civils Contracting Holding Company Limited | East Peckham | 2008 |
| Civils Holding Company Limited | Faversham | 2008 |
| Civils Store Group Limited | Shepton Mallet | 2020 |
| Civis Holding Company Ltd | Altrincham | 2026 |
| Civis Pfi/Ppp Infrastructure Fund General Partner Limited | London | 2010 |
| Civitas Housing Advisors Limited | London | 2019 |
| Civitas Investment Management Limited | London | 2016 |
| Civitas Social Housing Limited | London | 2016 |
| Civitas Supported Living Reit Limited | London | 2024 |
| Civiteq Limited | London | 2022 |
| Civity Holdings Limited | Oxford | 2022 |
| Civvals Holdings Limited | London | 2020 |
| CIW Ltd | London | 2020 |
| CIX Quercus Holding Ltd | Charing | 2025 |
| Ciél Bleu Collective Ltd | Sidcup | 2024 |
| CJ & Company Holdings Limited | Neath | 2025 |
| CJ & DJ Investments Ltd | Congleton | 2025 |
| CJ & H Holdings Limited | Reigate | 2018 |
| CJ & Will Ltd | London | 2024 |
| CJ Capital Group Limited | Aylesbury | 2026 |
| CJ Commercial Finance Ltd | London | 2016 |
| CJ Crew Ltd | Widnes | 2020 |
| CJ Electratech Holdings Ltd | Newcastle Upon Tyne | 2026 |
| CJ Engineering Holdings Limited | Aylesbury | 2018 |
| CJ Financial Management Limited | Hamilton | 2026 |
| CJ Financial Services Limited | Porthcawl | 2006 |
| CJ Foan Ltd | Westcliff On Sea | 2024 |
| CJ Food Holdings Ltd | Cobham | 2025 |
| CJ Foster Financial Services Ltd | Barrow Upon Humber | 2020 |
| CJ Group Services Limited | Ipswich | 2020 |
| CJ Group Surrey Limited | Wimbledon | 2020 |
| CJ Hawker Limited | Pershore | 2021 |
| CJ Holdco UK Limited | London | 2025 |
| CJ Holdings & Investments Limited | Leeds | 2016 |
| CJ Holdings Plymouth Ltd | Plymouth | 2025 |
| CJ Hole Financial Services Ltd | Bristol | 2024 |
| CJ Investment Global Ltd | Birmingham | 2026 |
| CJ Invests Limited | London | 2023 |
| CJ Jackson Ltd | Carluke | 2026 |
| CJ Knight Holdings Ltd | Potters Bar | 2018 |
| CJ Love Group Ltd | Sidcup | 2020 |
| CJ Monks Limited | St. Albans | 2014 |
| CJ Mortgage and Protection Ltd | Motherwell | 2025 |
| CJ Mortgage Hub Limited | Weymouth | 2023 |
| CJ Mortgages Ltd | Dover | 2021 |
| CJ Proplan Ltd | Plymouth | 2014 |
| CJ Recruitment Group Limited | Newcastle Upon Tyne | 2020 |
| CJ Southside Limited | Glasgow | 2026 |
| CJ Strategic Ltd | London | 2025 |
| CJ White Commercial Finance Ltd | Bedford | 2019 |
| CJ White Mortgages Limited | Bedford | 2017 |
| CJ Workplace Ltd | Chorley | 2021 |
| CJA Finance Ltd | Glasgow | 2025 |
| CJA Financial Services Limited | Westerham | 2006 |
| CJA Holdings Limited | Croydon | 2018 |
| CJA Property Group Ltd | Raynes Park | 2021 |
| Cjaye Consulting Ltd | Hamilton | 2019 |
| CJB & Sons Limited | Stone | 2025 |
| CJB 2021 Limited | Leicester | 2021 |
| CJB Holdings & Investments Ltd | Dudley | 2024 |
| CJB Private Holdings Ltd | London | 2021 |
| CJB Properties North West Ltd | Liverpool | 2026 |
| CJB Wealth Ltd | Altrincham | 2026 |
| Cjbh 19 Holdings Limited | London | 2025 |
| CJC & Sons Investments Ltd | Barry | 2023 |
| CJC Financial Ltd | Southsea | 2019 |
| CJC Group Holdings Ltd | Benfleet | 2022 |
| CJC Land and Developments Limited | Corby | 2020 |
| CJC Mortgages Ltd | Dartford | 2025 |
| CJC Newco Limited | Manchester | 2025 |
| Cjc&Mco Ltd | Stockport | 2025 |
| Cjch Financial Limited | Beckenham | 2015 |
| Cjct Group Limited | London | 2015 |
| CJD UK Holdings Limited | Northampton | 2024 |
| Cjdc Limited | Birmingham | 2003 |
| Cjdungar Holdings Limited | Norwich | 2021 |
| Cjej Limited | Margate | 2021 |
| CJF Developments UK Limited | Ormskirk | 2019 |