| City Gate Aberdeen Limited | Aberdeen | 2002 |
| City Green Holdings Limited | Solihull | 2024 |
| City Group Medical Holdings Limited | Exeter | 2021 |
| City Holdings Limited | Pershore | 2019 |
| City Homes Holdings Ltd | Newcastle Upon Tyne | 2025 |
| City House Capital Limited | London | 2006 |
| City House Investors Limited | Harrogate | 2005 |
| City I.D. Holdings Limited | Bristol | 2014 |
| City Insurance Brokers Ltd | London | 2016 |
| City International Holdings Ltd | Birmingham | 2019 |
| City Investment & Insurance Services Limited | Preston | 2005 |
| City Investment Solutions Ltd | Sale | 2018 |
| City Investment Strategies | Milton Keynes | 2017 |
| City Leasing (Holdings) Limited | Sunderland | 2023 |
| City Leasing (Thameside) Limited | London | 1978 |
| City Leasing Limited | London | 1972 |
| City Liner Ltd | Shepton Mallet | 2018 |
| City Metallic Ltd | London | 2025 |
| City Mortgages (London) Ltd | Watford | 2014 |
| City Mortgages Club Ltd | London | 2018 |
| City Music Limited | Corby | 2014 |
| City North (Telford Homes) Limited | Waltham Cross | 2011 |
| City of London Investment Group PLC | London | 1992 |
| City of London Investment Management Company Limited | London | 1993 |
| City of London Markets Limited | Cardiff | 2012 |
| City of London Mortgage Credit Limited | London | 1989 |
| City Padel Holdings Limited | Exeter | 2025 |
| City Plant and Screeding (Globe Works) Ltd | Brentwood | 2019 |
| City PLC | London | 1999 |
| City Premier Limited | Rainham | 2016 |
| City Presentations Limited | Newark | 1995 |
| City Prime Venture Capital Limited | Leeds | 2014 |
| City Properties NW Ltd | Blackburn | 2025 |
| City Property MG Limited | London | 2019 |
| City Quarter Brokers Limited | London | 2018 |
| City Realtor Group Limited | London | 2021 |
| City Realtor Holdings Limited | London | 2021 |
| City Refrigeration Holdings (UK) Limited | Glasgow | 2017 |
| City Refrigeration Holdings Limited | Glasgow | 2017 |
| City Riverside Limited | London | 2020 |
| City Sanctuary Capital (Woodville) Ltd | London | 2026 |
| City Secure Security Ltd | Leeds | 2023 |
| City Shape Moston Ltd | Southport | 2021 |
| City Solution (Holdco) Ltd | London | 2026 |
| City Special Metals Holdings Limited | London | 2025 |
| City Square London Limited | Crowthorne | 2001 |
| City Suites Holdings Limited | Alderley Edge | 2019 |
| City Taxis Holdings Limited | Cardiff | 2018 |
| City Tourism & Services Ltd | Rainham | 2019 |
| City Trading Global Ltd | London | 2025 |
| City Training Limited | | 1999 |
| City Trust Limited | London | 1973 |
| City View Capital Partners Ltd | Gomshall | 2025 |
| City Walk One Management Ltd | Liverpool | 2025 |
| City Walls Wealth Management Limited | Chester | 2026 |
| City Watch Holdings Ltd | Coalville | 2025 |
| City Way Group Ltd | London | 2025 |
| City Wealth Management Ltd | Bristol | 2024 |
| City Wealth Planning Ltd | London | 2010 |
| City West Investors Ltd. | Finchley | 2003 |
| City Wills (Nationwide) Limited | Basildon | 2026 |
| Citybay Holdings Ltd | Leicester | 2021 |
| Citybond Holdings Limited | London | 1980 |
| Citycom Technologies Group Limited | Brentford | 2013 |
| Cityedge Mortgages Limited | Barkingside | 2014 |
| Cityfame 1 Limited | Luton | 2024 |
| Citygate Capital Limited | Ilkley | 2018 |
| Citygate Commercial Finance Limited | Winchester | 2021 |
| Citygate Financial Planning Limited | London | 2014 |
| Citygate Insurance Services Limited | Belfast | 2007 |
| Citygate Mortgages Limited | Winchester | 2020 |
| Citygate Nominees Limited | London | 1987 |
| Citygold Financial Services Limited | Waterlooville | 2009 |
| Citygrove Trustee Limited | Godalming | 2016 |
| Citylife Corporation Ltd | Birmingham | 2018 |
| Citylight Homes Holdings Ltd | Enfield | 2023 |
| Citylights Holding Ltd | London | 2020 |
| Citymain Administrators Limited | Portsmouth | 2000 |
| Citymarch Limited | London | 1989 |
| Citymark Ltd | Beckenham | 2008 |
| Citymeade Holdings Ltd | Bolton | 2025 |
| Citymeade Limited | Bolton | 2023 |
| Citymoor Financial Ltd | Slough | 2019 |
| Citymoor Protection Ltd | Slough | 2019 |
| Citynet Insurance Brokers Limited | Retford | 2000 |
| Citynet London Holdings Ltd | Retford | 2012 |
| Cityone Capital Ltd | London | 2026 |
| Citypark Investments Limited | London | 2017 |
| Citypark Properties Limited | Manchester | 1987 |
| Cityplus Network Ltd | London | 2014 |
| Citypoint Capital Management Ltd. | London | 2015 |
| Citypoint Wealth Limited | Glasgow | 1974 |
| Cityscape Trade Holdings Ltd | Rickmansworth | 2023 |
| Cityscopes London Limited | Leeds | 2012 |
| Cityshape Investments Limited | Saffron Walden | 2012 |
| Cityside UK Holdings Limited | Manchester | 2022 |
| Citysprint (UK) Bidco Limited | Surrey | 2016 |
| Citystone Alliance - Financial Ltd | London | 2020 |
| Citystone Alliance Group Ltd | London | 2019 |
| Citytypes Limited | High Wycombe | 1984 |