| Citizen PAY Ltd | Watford | 2020 |
| Citizen Treasury 2 PLC | Birmingham | 2012 |
| Citizen Treasury PLC | Birmingham | 2017 |
| Citizen Treasury Vehicle Limited | Birmingham | 2017 |
| Citizenship Bureau Limited | London | 2025 |
| Citraserv Limited | Bexhill On Sea | 2020 |
| Citrine Capital Limited | London | 2015 |
| Citrine Mortgages Limited | Alcester | 2020 |
| Citrine Towers Limited | Harrow | 2023 |
| Citroen Property Development Limited | London | 2018 |
| Citroen Property Management Limited | London | 2018 |
| Citron Singer Finance Limited | London | 2014 |
| Citron Singer Limited | Belfast | 1972 |
| Citrouille Holdings Limited | Tadcaster | 2024 |
| Citrus Bidco Limited | Leatherhead | 2025 |
| Citrus Capital Ltd | London | 2025 |
| Citrus Compliance Ltd | Cirencester | 2022 |
| Citrus EBT Limited | Leatherhead | 2025 |
| Citrus Employers Oversight Company Limited | Guildford | 2023 |
| Citrus Enterprises Limited | London | 2024 |
| Citrus Financial Ltd | Milton Keynes | 2007 |
| Citrus Financial Management Limited | Sevenoaks | 2002 |
| Citrus Funding Limited | Cirencester | 2017 |
| Citrus Healthcare Consulting Limited | Dorking | 2010 |
| Citrus Holdco Limited | London | 2019 |
| Citrus Midco Limited | Leatherhead | 2025 |
| Citrus Property Holdings Limited | Stockport | 2018 |
| Citrus Renewable Energy Ltd | London | 2022 |
| Citrus Risk Management Ltd | Mansfield | 2016 |
| Citrus Topco Limited | Leatherhead | 2025 |
| Citrus Tree Services Limited | Norwich | 2023 |
| Citrus Wealth Management Limited | Ipswich | 2005 |
| Citrus-Lime Topco Limited | Ulverston | 2025 |
| Citta Group Holdings Limited | Ashford | 2024 |
| Citvest Limited | Guildford | 2023 |
| City & Commercial Holdings Limited | London | 1960 |
| City & Country Estate Planning Limited | London | 2020 |
| City & Country Financial Services Ltd | London | 2008 |
| City & Country Holdings Ltd | Stansted | 2015 |
| City & General (Co-Living) Limited | London | 2019 |
| City & General Securities Limited | | 2003 |
| City & London Mortgages Limited | Whittlebury | 1988 |
| City & Merchant Limited | Guildford | 1992 |
| City & Nationwide Recruitment Solutions Limited | Walsall | 2024 |
| City & Provincial Properties Finance Limited | London | 2017 |
| City & Provincial Properties Holdings 2 Ltd | London | 2018 |
| City & Provincial Properties Holdings Limited | London | 2017 |
| City & Provincial Properties W1 Ltd | London | 2020 |
| City & Provincial Trustee Limited | London | 1995 |
| City & Shire Asset Finance Limited | Turriff | 2020 |
| City & Shire Leasing Limited | Turriff | 2020 |
| City & Shire Limited | Turriff | 2020 |
| City & Shire Property Factors Ltd | Aberdeen | 2021 |
| City & Suburban (Holdings) Limited | Wallingford | 1991 |
| City & Urban Developments Limited | London | 1971 |
| City & Walbrook Group Limited | Kenilworth | 1984 |
| City 1ST Holdings Limited | Slough | 2025 |
| City Access Group Limited | Bonnyrigg | 2025 |
| City Accident Management Ltd | Birmingham | 2009 |
| City and Commercial Ltd | Market Harborough | 1993 |
| City and County Healthcare Holdings Limited | Nottingham | 2009 |
| City and European Asset Finance Limited | Surrey | 1997 |
| City and European Leasing Limited | West Horsley | 2009 |
| City and Trust Finance Limited | London | 1980 |
| City Asset Management PLC | London | 1988 |
| City Avenue Holdings Limited | Pinner | 2018 |
| City Aviation Capital Limited | Milton Keynes | 2024 |
| City Brands Ltd | Preston Farm Industrial Estate | 2019 |
| City Build Holdings Limited | Preston | 2018 |
| City Capital & Investments Limited | Manchester | 2017 |
| City Capital Investments Ltd | London | 2024 |
| City Centre Finance Ltd | London | 2024 |
| City Commercial Finance Ltd | Whitstable | 2019 |
| City Compliance Limited | London | 2010 |
| City Corp Group Ltd | London | 2018 |
| City Corporate Ltd | Laindon | 2009 |
| City Credit Capital (UK) Limited | London | 2001 |
| City Drain Clear Holding Company Ltd | Hamilton | 2024 |
| City Endowments Limited | St Albans | 1998 |
| City Equity Long Term Solutions Ltd | Glasgow | 2021 |
| City Executive Consultants Holdings Ltd | Woodford Green | 2023 |
| City Facilities Management Holdings Limited | Glasgow | 1999 |
| City Finance Advisers Ltd | London | 2020 |
| City Finance Brokers Limited | London | 2015 |
| City Finance Today Ltd | Birmingham | 2020 |
| City Financial Mortgages Ltd | Pinner | 2013 |
| City Financial Asset Management Limited | Middlesex | 1973 |
| City Financial NO1 Limited | Cardiff | 2019 |
| City Financial Planning (Exeter) Limited | Bath | 1998 |
| City Financial Planning Limited | Bath | 1996 |
| City Fish Holdings Limited | Waltham Abbey | 2024 |
| City FM Group Limited | Harrow | 2025 |
| City Football Group (Midco) Limited | Manchester | 2022 |
| City Football Group Limited | Manchester | 2013 |
| City Football Investments Limited | Manchester | 2020 |
| City Football U.K. Holdings 2 Limited | Manchester | 2025 |
| City Football U.K. Holdings Limited | Manchester | 2017 |
| City Fringe Limited | London | 2018 |
| City Funding Ltd | | 2008 |
| City Gaming Limited | London | 2018 |