| Copes Heating Limited | Construction | 2014 |
| Coppice Farm Fish and Chips Ltd | Wholesale & retail | 2025 |
| Corbelli Group Ltd | Wholesale & retail | 2026 |
| Core Titan Ltd | Hospitality | 2023 |
| Corelume Ltd | Information & communication | 2023 |
| Cornwallis House (AGG16) Limited | Real estate | 2015 |
| Cotton Candy Travel Limited | Administrative & support | 2019 |
| Cqms Limited | Professional & scientific | 1994 |
| Craig Meats Holdings Ltd | Financial services | 2026 |
| Craigs Meat Shack Limited | Wholesale & retail | 2018 |
| Creative Homes & Estates Ltd | Real estate | 2025 |
| Creative Info Tech Limited | Professional & scientific | 2012 |
| Creativecomp Ltd | Wholesale & retail | 2015 |
| Crescent Borough Limited | Real estate | 2017 |
| Cretework Limited | Construction | 2025 |
| Crewecakes Limited | Wholesale & retail | 2024 |
| Criscross Limited | Real estate | 2001 |
| Critical Power Applications & Solutions Limited | Manufacturing | 2019 |
| Crocodile Scaffolding (England) Limited | Extraterritorial | 2001 |
| Cromwell Systems Limited | Information & communication | 2025 |
| Cross Street Takeaway Ltd | Hospitality | 2025 |
| Crossley Information Management Limited | Information & communication | 2019 |
| Crystal Future Ltd | Professional & scientific | 2025 |
| Crystal HR & Payroll Ltd | Professional & scientific | 2018 |
| CS Munch Limited | Hospitality | 2020 |
| CSO Technologies Limited | Construction | 2014 |
| Ctrl House Media Ltd | Administrative & support | 2020 |
| CTS Flooring Limited | Construction | 2020 |
| Curly Growth Limited | Wholesale & retail | 2025 |
| Customized Community Support Ltd | Health & social care | 2022 |
| D & D Ladies Hairdressing Limited | Health & social care | 2023 |
| D & S Plastering Limited | Construction | 2004 |
| D P Homes Limited | Real estate | 2015 |
| D&H Limited | Wholesale & retail | 2015 |
| D.J.R Support and Services Limited | Administrative & support | 2017 |
| D.S.Johal Properties Limited | Real estate | 2012 |
| D.S.Sandhu Construction Limited | Construction | 2024 |
| Dadiouse Shipping Ltd | Manufacturing | 2022 |
| DAF Building Limited | Construction | 2025 |
| Daksh Transport Ltd | Transport & logistics | 2020 |
| Dale Haulage Ltd | Transport & logistics | 2024 |
| Dale Motor Services Ltd | Wholesale & retail | 2024 |
| DAM Construction Ltd | Construction | 2024 |
| Damroud Tools Ltd | Construction | 2025 |
| Daniel Pipework Limited | Construction | 2003 |
| Danmico Limited | Transport & logistics | 2019 |
| Danroute Ltd | Transport & logistics | 2021 |
| Darcy Rose Holdings Limited | Professional & scientific | 2024 |
| Dark Foundry NO.8 (Walsall) Ltd | Manufacturing | 2025 |
| Darkenrey Cleaning Limited | Construction | 2023 |
| Darkenrey Interior Ltd | Construction | 2026 |
| Darroch House Consultancy Ltd | Information & communication | 2018 |
| Darshmind Capital Ltd | Financial services | 2026 |
| Dartscoachuk Limited | Education | 2025 |
| Dash Deliveries Ltd | Transport & logistics | 2026 |
| Datadad Ltd | Professional & scientific | 2026 |
| Davenport Burgess Limited | Professional & scientific | 1924 |
| Davenport Holdings (Willenhall) Limited | Professional & scientific | 2006 |
| David & Sons (PVT) Ltd | Health & social care | 2015 |
| David Aston Properties Limited | Professional & scientific | 2012 |
| David Engineering Limited | Manufacturing | 2017 |
| David Williams Group Ltd | Financial services | 2026 |
| David Williams Ltd | Manufacturing | 2026 |
| Dawnforest Limited | Administrative & support | 2002 |
| Dazprac Ltd | Health & social care | 2015 |
| DB Accconsult Limited | Professional & scientific | 2026 |
| Dbdb Limited | Transport & logistics | 2017 |
| DCT Domestics Limited | Administrative & support | 2021 |
| DDS Driving School Ltd | Education | 2025 |
| Deaf Support and Care Services Ltd | Health & social care | 2015 |
| Dealz Outlet Limited | Wholesale & retail | 2025 |
| Debs Tranquil Healing Academy Ltd | Education | 2025 |
| Deep Chillaz Limited | Hospitality | 2025 |
| Deep Ophthalmic Limited | Manufacturing | 2023 |
| Defa UK Ltd | Administrative & support | 2020 |
| Delegated Development Ltd | Information & communication | 2019 |
| Deluxe Carpet & Flooring Ltd | Wholesale & retail | 2026 |
| Deluxe Carpets & Flooring Ltd | Wholesale & retail | 2018 |
| Deluxe Carpets Willenhall Ltd | Wholesale & retail | 2025 |
| Deluxe Flooring Group Limited | Wholesale & retail | 2021 |
| Deol Roadways Ltd | Transport & logistics | 2025 |
| Desired Collectibles Limited | Wholesale & retail | 2023 |
| DEV Inspiration Limited | Financial services | 2020 |
| Dfrnt CIC | Wholesale & retail | 2026 |
| DFS Wholesale Ltd | Wholesale & retail | 2021 |
| DG & Co Mercantile Ltd | Wholesale & retail | 2025 |
| DG Evolutions Limited | Real estate | 2008 |
| Dgnconstructiongroup Limited | Construction | 2024 |
| Dhadda Transport Ltd | Transport & logistics | 2018 |
| Dhanoa Garage Limited | Wholesale & retail | 2018 |
| Dhanoa Holdings Limited | Real estate | 2024 |
| Dhaxo Limited | Construction | 2023 |
| Dhillon Construction Group Ltd | Construction | 2026 |
| Dhillon Desgin and Print Ltd | Manufacturing | 2020 |
| Dhillon Family Holdings Ltd | Financial services | 2026 |
| Dhillon HGV Limited | Transport & logistics | 2023 |
| Dhillon Parcel Money & ALL Services Ltd | Transport & logistics | 2024 |
| Dhillons Asset and Investment Ltd | Real estate | 2024 |
| Diamond NET Global Ltd | Information & communication | 2024 |
| Diaspora Property Development Ltd | Information & communication | 2019 |