| Concept Mortgages Limited | Wirral | 2007 |
| Concept Red Ltd. | London | 2020 |
| Concept Solutions 2009 Limited | Walsall | 2008 |
| Concept Special Risks Holdings Ltd | Guiseley | 2013 |
| Concept Special Risks Ltd | Leeds | 1969 |
| Concept Technology Group Ltd | Stanley | 2024 |
| Concept VC I (Scotland) Ltd | Edinburgh | 2022 |
| Concept VC II (Scotland) Ltd | Edinburgh | 2024 |
| Concept Wealth Ltd | Sheffield | 2020 |
| Conception Holdings Limited | Bournemouth | 2017 |
| Conception X Angel Syndicate Limited | London | 2025 |
| Conceptor Holdings Limited | Fordingbridge | 2017 |
| Concepts Group Holdings Limited | Brighton | 2022 |
| Conceptum Group Limited | London | 2026 |
| Conceptunet Holdings Ltd | Chesterfield | 2015 |
| Conceros Holdings Ltd | London | 2024 |
| Concert Bidco Limited | Leeds | 2020 |
| Concert Healthcare Property Holdings Ltd | Chorley | 2021 |
| Concert Midco Limited | London | 2020 |
| Concert Newco Limited | Leeds | 2021 |
| Concert Topco Limited | London | 2020 |
| Concertive Engineering Holdings Ltd | Dudley | 2019 |
| Concerto Vita Holdings Limited | Stevenage | 2013 |
| Concerto Vita Limited | Stevenage | 2012 |
| Concerva Limited | Salford | 2001 |
| Concha Holdings Limited | London | 2022 |
| Concierge 2000 Limited | Oswestry | 2026 |
| Concierge 36 Limited | Oswestry | 2010 |
| Concierge Health Advisors Ltd | London | 2026 |
| Concierge Wealth Management Limited | Worthing | 2011 |
| Conciliate Ltd | London | 2007 |
| Concilium Group Limited | Harrow | 2015 |
| Concise Financial Services Ltd | Manchester | 2018 |
| Concise Mortgages Ltd | Kingswinford | 2020 |
| Concise Technologies Group Limited | Nottingham | 2008 |
| Concise Wealth Management Ltd | Paignton | 2010 |
| Conclusive Financial Limited | Manchester | 2013 |
| Concoo Holding Limited | Hebden Bridge | 2022 |
| Concoo Limited | London | 2025 |
| Concord Asset Management Ltd | Romford | 2012 |
| Concord Copyrights NO.1 Limited | London | 2021 |
| Concord House Ventures Limited | Dagenham | 2021 |
| Concord Lifting Equipment Holdings Limited | London | 2024 |
| Concord Resources International Minerals Limited | London | 2021 |
| Concorde Bidco Limited | Reading | 2020 |
| Concorde Capital Limited | Chorley | 2014 |
| Concorde Insurance Brokers Limited | Eastleigh | 1995 |
| Concorde International Group Ltd | Dagenham | 2023 |
| Concorde Investments Ltd | Loughborough | 2023 |
| Concorde Payroll Services Ltd | Torrington | 2025 |
| Concorde PIK Holdco Limited | England | 2024 |
| Concorde Pikco Limited | England | 2024 |
| Concorde Risk Services Ltd | Ferndown | 2020 |
| Concordia Capital Group Holdings (U.K.) Ltd | London | 2025 |
| Concordia Chartered Loss Adjusters Ltd | Witham | 2012 |
| Concordia Construction Group Limited | Sturminster Newton | 2026 |
| Concordia Consultancy Ltd | Witham | 2003 |
| Concordia Financial Planning Ltd | Sheffield | 2023 |
| Concordia Global Finance Limited | London | 2018 |
| Concordia Global Network Limited | Witham | 2009 |
| Concordia Risk Ltd | Witham | 2012 |
| Concordiam Limited | Dorchester | 2026 |
| Concordium Equities Ltd | London | 2025 |
| Concordium Holdings Ltd | Barnsley | 2026 |
| Concordium Omnias Ltd | London | 2026 |
| Concourse Holdings Limited | Rochester | 2023 |
| Concrete Bidco Limited | London | 2022 |
| Concrete Capital Limited | London | 2018 |
| Concrete Developments (Readymix) Ltd | Solihull | 2016 |
| Concrete Equipment Finance Limited | Portsmouth | 2016 |
| Concrete Finance Limited | Portsmouth | 2019 |
| Concrete Mixology Limited | Stoke Prior | 1997 |
| Concrete Scotland Limited | Beith | 2024 |
| Concrete Trade Solution Ltd | Stanmore | 2020 |
| Concrete VC I (Opco) Ltd | Poole | 2022 |
| Concustodio Risk Ltd | Swansea | 2022 |
| Condale Holdings Limited | Felbridge | 2022 |
| Condate Services Limited | London | 2024 |
| Conde Holdings Limited | Swansea | 2026 |
| Conde Nast & National Magazine Distributors Limited | London | 1977 |
| Condicote Developments Ltd | London | 2024 |
| Condie & Co Holdings Limited | Dunfermline | 2024 |
| Condies Holdings Limited | Dunfermline | 2024 |
| Conditor Group Limited | Swanley | 2023 |
| Condon Claims Management Limited | London | 2000 |
| Condor Holdco Limited | London | 2020 |
| Condor Homes Limited | Enfield | 2008 |
| Condor Partners Limited | London | 2016 |
| Condor Topco Limited | London | 2020 |
| Condor UK Bidco Ltd | London | 2023 |
| Condor Ventures Limited | Bristol | 2023 |
| Condorrat PHC Ltd | Glasgow | 2025 |
| Conducia & Partners Banquiers Limited | London | 2022 |
| Conduit Finance Ltd | Edinburgh | 2019 |
| Conduit Mead Ventures Limited | Wimbledon | 1925 |
| Conduit Rail Limited | London | 2022 |
| Conduit Sustainability Investments Limited | London | 2019 |
| Conduit Ventures (General Partner) Limited | London | 2002 |
| Conduit Ventures CI (General Partner) Limited | Edinburgh | 2006 |
| Conduit Ventures General Partner II Limited | London | 2006 |