| Commercialista Ltd | London | 2023 |
| Commercialisti Londra Ltd | London | 2006 |
| Commercialisti Ltd | London | 2017 |
| Commerz Nominees Limited | London | 1998 |
| Commerzbank Holdings (UK) Limited | | 1961 |
| Commerzbank Leasing December (12) Limited | | 1993 |
| Commerzbank Leasing March (3) Limited | | 1989 |
| Commerzbank Leasing September (5) Limited | | 1989 |
| Commerzbank Pension Trustees Limited | | 1988 |
| Commgroup Limited | Warrington | 2008 |
| Commission Studio Holdings Limited | London | 2023 |
| Commlite Ltd | Brentwood | 2011 |
| Commodity Appointments Ltd | Petersfield | 2005 |
| Commodity Partners Limited | Surrey | 1996 |
| Commodity Plastics Limited | Lancashire | 1996 |
| Commodmerce (UK) Limited | Oldham | 2014 |
| Commodore Court Residents Ltd | Canterbury | 2000 |
| Common and Kind Ltd | Manchester | 2025 |
| Common Cause Group Ltd | York | 2026 |
| Common Farm Properties Limited | Droitwich Worcs | 1988 |
| Common Ground Association | Edinburgh | 2012 |
| Common Land Holdings Ltd | Birmingham | 2020 |
| Common Lane 1970 Limited | Birmingham | 2015 |
| Commonside Investments Limited | Warrington | 2006 |
| Commonwealth Argosy Foundation Ltd | Cambridge | 2014 |
| Commonwealth Disabled Peoples' Forum | London | 2012 |
| Commonwealth Mint Worldwide Ltd | Birmingham | 2011 |
| Commotion Clothing Limited | Leeds | 2025 |
| Comms Buyer Network Ltd | Bedford | 2012 |
| Comms NOW Limited | Bromley | 2013 |
| Comms Resale Ltd | Sheffield | 2012 |
| Comms Save Group Limited | Crewe | 2009 |
| Commschanger Limited | Southsea | 2025 |
| Commscience Ltd | Wellingborough | 2009 |
| Communal Energy Partners Ltd | Crosby | 2020 |
| Communication & Control Engineering Co. Limited | Derby | 1992 |
| Communication and Marketing Ltd | London | 2020 |
| Communication CAN Ltd | Bristol | 2020 |
| Communication Rocks Ltd | Wakefield | 2014 |
| Communication, Advertising and Marketing Education Limited | Berkshire | 1979 |
| Communications Resale Ltd | Sheffield | 2012 |
| Community 1ST Cornwall (Holdco) Limited | Stockport | 2012 |
| Community Appliances Ltd | Stockport | 2023 |
| Community Build Solutions Ltd | Wigan | 2015 |
| Community Calling Ltd | Belfast | 2020 |
| Community Care Services Limited | Exeter | 1992 |
| Community Computers Ltd | Stockport | 2024 |
| Community Creators Ltd | Swansea | 2023 |
| Community Energy Innovations Ltd | Inverness | 2016 |
| Community Financials Solutions Ltd | Hailsham | 2024 |
| Community Housing Action Limited | Cobham | 1990 |
| Community Housing Solutions Ltd | Birmingham | 2025 |
| Community IP Ltd | London | 2020 |
| Community Links Trading Limited | London | 2006 |
| Community Maintenance Service CIC | Boston | 2022 |
| Community Nursing & Care Agency Limited | Ashford | 2016 |
| Community of Saint Etienne SA Ltd | London | 2022 |
| Community PUB Company Limited | London | 2024 |
| Community Ventures Windmill Ltd | Altrincham | 2019 |
| Como Construction Limited | London | 2003 |
| Como Hotels and Resorts Limited | London | 1997 |
| Como Properties Limited | | 1998 |
| Como Shambhala (Kensington) Limited | London | 2023 |
| Comp-Bhp Ltd | Bristol | 2025 |
| Compact Foilers Ltd | Taunton | 2009 |
| Compact Heating Products Limited | Hampshire | 2003 |
| Compact Plant Sales Limited | Farnborough | 2016 |
| Compact Services Limited | Kent | 2000 |
| Compact Surfacing Limited | Market Drayton | 2017 |
| Compacta-Bin Limited | Brighton | 1999 |
| Compagnie Monegasque DE L Immobilier ET DE LA Finance Ltd | Dover | 2017 |
| Compak Developments Limited | | 1999 |
| Companiesmadesimple Limited | London | 2004 |
| Companion Limited | Liverpool | 2016 |
| Company Colours Limited | Knaresborough | 2002 |
| Company Compliance Ltd | Tunbridge Wells | 2023 |
| Company Dissolution Limited | London | 2008 |
| Company Exchange Limited | Reading | 2018 |
| Company Finders Limited | London | 2000 |
| Company Formation Solutions Limited | Doncaster | 2005 |
| Company Formation.Com Ltd | Crosby | 2002 |
| Company Formations UN Limited | Swansea | 2013 |
| Company Holder | Cardiff | 2023 |
| Company Incorporations Worldwide Limited | Doncaster | 2015 |
| Company Law Club Limited | Newcastle Upon Tyne | 1999 |
| Company Multiservice Limited | Edinburgh | 2021 |
| Company Registrations Online Limited | Stockport | 2025 |
| Company Restoration Services Limited | Hassocks | 2016 |
| Company Searches Made Simple Ltd | London | 2009 |
| Company Select Business Services Limited | Telford | 2020 |
| Company Select Limited | Telford | 2021 |
| Company Stormdog Productions Limited | London | 2002 |
| Company Tutoring Limited | Manchester | 1997 |
| Company Union Limited | Coventry | 2021 |
| Company Valuation Limited | London | 2009 |
| COMPANYM8 Limited | Wedmore | 2022 |
| Companyrescue Limited | Berwick Upon Tweed | 1997 |
| Compaq (Germany) Agrochemical Group Co., Ltd | London | 2023 |
| Compare and Recycle Limited | Maidstone | 2015 |
| Compare Cryptocurrencies Limited | Hackney Wick | 2026 |