| Celage Services Ltd | Public administration | 2019 |
| Central Access Systems Limited | Administrative & support | 1995 |
| CGL Landscaping Limited | Administrative & support | 2022 |
| Chamberlain Partners Limited | Professional & scientific | 2024 |
| Champion-Uk Consulting Ltd | Information & communication | 2025 |
| Champion-Uk Homes - Oak Lodge Limited | Construction | 2026 |
| Champion-Uk Homes - the Coach House Limited | Construction | 2026 |
| Champion-Uk Homes - the Granary Limited | Construction | 2026 |
| Champion-Uk Homes Ltd | Construction | 2024 |
| Charles Timothy James Ltd | Extraterritorial | 2020 |
| City & Country Bath Ltd | Construction | 2024 |
| City & Country Bedminster Ltd | Construction | 2014 |
| City & Country Bristol Limited | Construction | 2011 |
| City & Country Burderop Ltd | Construction | 2015 |
| City & Country Colchester 2 Ltd | Construction | 2024 |
| City & Country Colchester Ltd | Construction | 2015 |
| City & Country Commercial Ltd | Construction | 2002 |
| City & Country Construction Ltd | Construction | 1972 |
| City & Country Corporation Ltd | Construction | 1984 |
| City & Country Dorchester Ltd | Construction | 2016 |
| City & Country Estates Ltd | Professional & scientific | 2002 |
| City & Country Gloucester Ltd | Construction | 2016 |
| City & Country Group PLC | Professional & scientific | 2002 |
| City & Country Holdings Ltd | Financial services | 2015 |
| City & Country Homes Limited | Construction | 1999 |
| City & Country Mersea Ltd | Construction | 2015 |
| City & Country Portsmouth Ltd | Construction | 2016 |
| City & Country Residential Ltd | Construction | 1962 |
| City & Country Restorations Ltd | Professional & scientific | 2002 |
| City & Country Restorations Two Limited | Wholesale & retail | 1999 |
| City & Country Shepton Mallet Ltd | Construction | 2016 |
| City & Country Springfield Ltd | Construction | 2019 |
| City & Country Stansted Ltd | Construction | 2024 |
| City & Country Sundridge Ltd | Construction | 2014 |
| City & Country Wellwick Ltd | Agriculture & fishing | 2020 |
| Cityblock Residents Management Limited | Real estate | 1986 |
| CJ Construction and Maintenance Ltd | Construction | 2018 |
| Cjrees Residential Ltd | Real estate | 2025 |
| Clark & Levy Limited | Information & communication | 2013 |
| Classic Bits Ltd | Wholesale & retail | 2026 |
| Clearpath Gritting Ltd | Administrative & support | 2026 |
| Clever Pencil Limited | Professional & scientific | 2009 |
| Cloud 9 Living Ltd | Households | 2019 |
| Coflection Limited | Professional & scientific | 2024 |
| Collabio Ltd | Professional & scientific | 2024 |
| Commend UK Limited | Manufacturing | 1997 |
| Company of Catholic Companions Ltd | Other services | 2023 |
| Compliance Cube Limited | Professional & scientific | 2020 |
| Complus Lift Limited | Administrative & support | 2001 |
| Complus Teltronic Limited | Administrative & support | 2008 |
| Concierge U Limited | Administrative & support | 2017 |
| Connaught Capital Ltd | Professional & scientific | 2023 |
| Connecto Airport Taxis Limited | Transport & logistics | 2023 |
| Conneely Contracts Limited | Construction | 2015 |
| Conneely D.C. Ltd | Construction | 2026 |
| Conneely Data Centres Ltd | Construction | 2026 |
| Conneely Drylining Limited | Other services | 1993 |
| Conneely Facades Limited | Administrative & support | 2005 |
| Connex Aviation Limited | Transport & logistics | 2013 |
| Contract Locking Services Limited | Administrative & support | 2002 |
| COO & Co London Limited | Professional & scientific | 2016 |
| Coriolis Capital Management Limited | Financial services | 2019 |
| Courtauld & Co Architects Limited | Professional & scientific | 2021 |
| Cradon Investments Ltd | Financial services | 2000 |
| Creative Showcase Limited | Information & communication | 2009 |
| Crosscount Limited | Professional & scientific | 2008 |
| Cube Office Interiors Limited | Construction | 2009 |
| D. Honour & SON (Landscape) Limited | Other services | 1978 |
| D.A.R.K Electrical Contractors Ltd | Construction | 2021 |
| Dalton Buck Limited | Administrative & support | 2012 |
| Danton Pathology Services Limited | Health & social care | 2023 |
| Daper Scaffolding Limited | Construction | 2010 |
| Dapper England Limited | Wholesale & retail | 2014 |
| Dark Engine Limited | Information & communication | 2020 |
| Datum Construction Group Ltd | Construction | 2015 |
| Debrose Ltd | Hospitality | 2015 |
| Diamond Hangar Limited | Real estate | 2007 |
| DLA Cosmetics Ltd | Wholesale & retail | 2025 |
| Dom's Heating & Plumbing Limited | Construction | 2009 |
| DR Properties Management Limited | Households | 2026 |
| Drive Range Limited | Administrative & support | 2025 |
| Droneworx Ltd | Transport & logistics | 2024 |
| DT Forum Limited | Information & communication | 2014 |
| Duty Planning Consulting Limited | Professional & scientific | 2003 |
| Dworx Limited | Information & communication | 2021 |
| Dynamic Counselling Ltd | Health & social care | 2019 |
| Dynamite Design Limited | Administrative & support | 2014 |
| E J Bishop Homes Limited | Construction | 2011 |
| Earcann Ltd | Administrative & support | 2025 |
| Earl Trading Limited | Real estate | 2013 |
| Earthjet Engineering Ltd | Manufacturing | 2014 |
| East Midlands Training Limited | Transport & logistics | 2001 |
| Easyyem-Ecs UK Ltd | Wholesale & retail | 2020 |
| Ebas Diamond Holdings Limited | Financial services | 2013 |
| Edufin Partners Ltd | Wholesale & retail | 2025 |
| Edward VII Estates Ltd | Construction | 2007 |
| Edward VII Estates Three Ltd | Construction | 2018 |
| Edward VII Estates Two Ltd | Construction | 2013 |
| Egal Solutions Limited | Construction | 2025 |
| Electrolink Limited | Professional & scientific | 2006 |