| Coffee on the Bike Ltd | Hospitality | 2019 |
| Colon Hydrotherapy Academy Ltd | Education | 2026 |
| Complete Props Ltd | Real estate | 2020 |
| Conceptual Vogue Ltd | Wholesale & retail | 2013 |
| Considered Futures Ltd | Professional & scientific | 2016 |
| Conspare Holdings Limited | Professional & scientific | 1977 |
| Conspare Limited | Construction | 2016 |
| Coys Inns Ltd | Hospitality | 2019 |
| Cparnell Investments Ltd | Real estate | 2025 |
| CPB Fencing & Tree Services Ltd | Construction | 2022 |
| CPC Inspection Ltd | Professional & scientific | 2019 |
| CPI (Pneumatics) Limited | Wholesale & retail | 1992 |
| Craftstation (Midlands) Limited | Wholesale & retail | 2010 |
| Craig & Co Landscapes & Maintenance Ltd | Administrative & support | 2018 |
| Cravory Ltd | Hospitality | 2024 |
| Crimson Crystal Limited | Other services | 2025 |
| Cristudwood Ltd | Hospitality | 2026 |
| Crump & Lowe Developments Limited | Construction | 2020 |
| Crump Electrical Limited | Construction | 2013 |
| Csawt Limited | Professional & scientific | 2024 |
| CSM Audiology Ltd | Health & social care | 2023 |
| CSM Locum Ltd | Health & social care | 2026 |
| CSS Scaffolding Limited | Construction | 2026 |
| CT Facilities Ltd | Administrative & support | 2024 |
| Cullform Ltd | Construction | 2026 |
| Curry Bombay Express Ltd | Hospitality | 2026 |
| Curry House Sutton Ltd | Hospitality | 2024 |
| Cursham Services Ltd | Administrative & support | 2019 |
| Customised Badges Ltd | Manufacturing | 2023 |
| Customised Print Ltd | Manufacturing | 2022 |
| Customised Signage Ltd | Manufacturing | 2023 |
| CVH - Omfb Limited | Manufacturing | 1984 |
| D & S Smithurst Holdings Ltd | Hospitality | 2023 |
| D H Specialist Cars Limited | Wholesale & retail | 2017 |
| D J C Professional Tree Services Limited | Administrative & support | 2003 |
| D W Miller Holdings Limited | Financial services | 2022 |
| D&J Plastering & Drylining Ltd | Construction | 2022 |
| D&R Assets Ltd | Real estate | 2025 |
| D.I. Blow (Holdings) Limited | Real estate | 1983 |
| D.J. Simcox Limited | Real estate | 1976 |
| D.J.Brown Supply Chain Solutions Limited | Professional & scientific | 2025 |
| D3KRYPTION Studios Limited | Other services | 2024 |
| Daisy Collectibles Ltd | Wholesale & retail | 2026 |
| Dalatek Limited | Extraterritorial | 2006 |
| Dalestorth Guest House Limited | Hospitality | 1991 |
| Dalton Digital Limited | Information & communication | 2024 |
| Damex Solutions Ltd | Administrative & support | 2024 |
| Damon Pilkington Electrical Ltd | Construction | 2014 |
| Damp Busters (Midlands) Limited | Construction | 2025 |
| Danfranny Healthcare Ltd | Health & social care | 2019 |
| Dash Care Ltd | Health & social care | 2023 |
| Data Made Lucid Ltd | Information & communication | 2026 |
| David Bowen Limited | Wholesale & retail | 2007 |
| Dawson Public House Limited | Hospitality | 2025 |
| Daytiel Ltd | Information & communication | 2026 |
| DB Haulage and Driving Solutions Ltd | Transport & logistics | 2022 |
| DB Meters Limited | Construction | 2025 |
| DC Fabrications Limited | Professional & scientific | 2023 |
| DC Properties, Developments and Investments Ltd | Construction | 2026 |
| Decsol Ltd | Construction | 2017 |
| Deere Apprenticeships Ltd | Education | 2011 |
| Delicious Takeaway Ltd | Hospitality | 2025 |
| Delivery Futures Consulting Services (Dfcs) Ltd | Information & communication | 2022 |
| Demure Care Ltd | Health & social care | 2024 |
| Derby and Notts Pubs Limited | Hospitality | 2019 |
| Design Build Complete Ltd | Construction | 2019 |
| Design Develop Build Limited | Construction | 2023 |
| Design Hill Ltd | Wholesale & retail | 2019 |
| Design Living Space Limited | Professional & scientific | 2022 |
| Develop Eco Ltd | Construction | 2020 |
| DFD Plant Ltd | Water & waste | 2019 |
| DI Blow Topco Limited | Financial services | 2024 |
| Digital Radio Instruments Ltd | Manufacturing | 2012 |
| Digital Solution Hub Ltd | Administrative & support | 2025 |
| Dino Tattoo Show Ltd | Arts & recreation | 2023 |
| Direct Site Ltd | Construction | 2008 |
| Distinctive Drywall Limited | Construction | 2025 |
| Diverse Care Connections Limited | Health & social care | 2025 |
| Divine Aesthetics and Body Contouring Limited | Wholesale & retail | 2021 |
| Divyas Kitchen Ltd | Hospitality | 2026 |
| Dixon Property Holdings Limited | Real estate | 2019 |
| DJ Moving Service Ltd | Transport & logistics | 2025 |
| DM Furnishings Beds Ltd | Wholesale & retail | 2021 |
| DM Property (Spain) Limited | Real estate | 2016 |
| Dmtesseract Ltd | Arts & recreation | 2023 |
| DO Great Work Ltd | Professional & scientific | 2022 |
| Dobbins Land & Estates Limited | Real estate | 2026 |
| Doru Rendering Ltd | Construction | 2022 |
| Dovetail Technology Limited | Manufacturing | 2009 |
| DP Mould Tool Polishing Services Limited | Manufacturing | 2016 |
| DP Tool Hire Limited | Wholesale & retail | 2003 |
| Dppm Solutions Ltd | Professional & scientific | 2024 |
| Dragon Software Engineering Limited | Information & communication | 2008 |
| Dreamees Craft Limited | Manufacturing | 2023 |
| Driftwood Limited | Real estate | 2000 |
| DRY OR DIE Ltd | Arts & recreation | 2026 |
| Duffy Optometrists Limited | Other services | 2003 |
| Duncan James Automotive Limited | Wholesale & retail | 2024 |
| Dunn and Gallimore Properties Limited | Real estate | 2021 |
| Dunnscroft Lettings Limited | Hospitality | 2019 |