| Craftynotions Ltd | Manufacturing | 2006 |
| Crangon Ltd | Manufacturing | 2016 |
| Creatisan Limited | Professional & scientific | 2022 |
| Creative Materials Handling Limited | Other services | 2017 |
| Creed Holdings Ltd | Financial services | 2025 |
| Crestclub Limited | Hospitality | 2000 |
| Cripps Executive Motor Vehicle Centre Ltd | Wholesale & retail | 2003 |
| CRL Publishing Limited | Information & communication | 1990 |
| Crystal Carat Ltd | Arts & recreation | 2021 |
| Crystal Clear Compliance Limited | Professional & scientific | 2014 |
| Crystal Dental Clinic Limited | Health & social care | 2011 |
| CST Electronics Limited | Wholesale & retail | 2013 |
| Cstt Properties Limited | Extraterritorial | 2021 |
| CT Care Ltd | Health & social care | 2011 |
| Ctreetwo Limited | Hospitality | 2012 |
| Cubeko Electrical Ltd | Construction | 2023 |
| Cultured Cloud Ltd | Information & communication | 2018 |
| Curb Architecture Limited | Extraterritorial | 2017 |
| Curiosity Matrix Ltd | Information & communication | 2026 |
| Cusick Solutions Limited | Professional & scientific | 2010 |
| Custom Cases Limited | Professional & scientific | 2002 |
| Cuthbertson Hewitt Limited | Professional & scientific | 1999 |
| CZESIO02 Ltd | Transport & logistics | 2018 |
| D J Hensher Building and Carpentry Services Ltd | Construction | 2022 |
| D S Ronald Limited | Construction | 2003 |
| D W Ground Services Limited | Construction | 2026 |
| D Williams Roofing and Building Ltd | Construction | 2026 |
| D&E Retail Limited | Wholesale & retail | 2017 |
| D.Q.S.C Ltd | Professional & scientific | 2025 |
| DAB Investments Ltd | Construction | 2023 |
| Daemma Trading Limited | Wholesale & retail | 1999 |
| Daffodils Outdoor Nursery Limited | Health & social care | 2016 |
| Dainty Dish Limited | Hospitality | 2019 |
| Daisy & FOX Floristry Limited | Wholesale & retail | 2024 |
| Daisy Dots Photography Limited | Other services | 2016 |
| Daka Gunatunga Limited | Health & social care | 2024 |
| Dale Farm Services Limited | Real estate | 2026 |
| Dancy Investments Limited | Real estate | 2018 |
| Dane Anglia Viking (UK) Limited | Wholesale & retail | 2024 |
| Danielle Churchill Limited | Wholesale & retail | 2025 |
| Danielle Nutley Limited | Real estate | 2025 |
| Danson Professional Solutions Limited | Professional & scientific | 2009 |
| Darbys GE Limited | Professional & scientific | 2020 |
| Darefactory Ltd | Information & communication | 2015 |
| DARING2B Ltd | Other services | 2022 |
| Darline Limited | Other services | 2017 |
| Datlec Limited | Construction | 2017 |
| Dave Palmer Electrical Contractor Limited | Construction | 2007 |
| Davendara Limited | Wholesale & retail | 2025 |
| David Josephs Communications Ltd | Professional & scientific | 2005 |
| David S. Brown Limited | Professional & scientific | 2009 |
| David Short Corporate Services Limited | Professional & scientific | 2016 |
| David Tymm Limited | Wholesale & retail | 2024 |
| David Walker Commercial Limited | Real estate | 2014 |
| David Webb Management Limited | Professional & scientific | 1991 |
| Davidara Estates Limited | Real estate | 2025 |
| Davison Communications (UK) Limited | Extraterritorial | 2002 |
| DAW Property Developments Limited | Construction | 2004 |
| Dbdc Consultancy Ltd | Information & communication | 2021 |
| DC TEK Limited | Administrative & support | 2022 |
| DCI Property Investments Limited | Real estate | 2015 |
| DDB Ventures Limited | Construction | 2008 |
| Ddean Healthcare Limited | Health & social care | 2013 |
| Ddnk Properties Ltd | Real estate | 2018 |
| DE Luca Total Coaching Ltd | Health & social care | 2018 |
| DE Montfort International Limited | Wholesale & retail | 1972 |
| Deals & Disputes Solicitors LLP | | 2011 |
| Deb-It-Rich Ltd | Real estate | 2024 |
| Debdale PUB Company Limited | Hospitality | 2024 |
| Decormade Limited | Real estate | 1997 |
| Deep Listening Ltd | Education | 2018 |
| Define Fine CIC | Other services | 2020 |
| Dehwa Health Initiatives Limited | Health & social care | 2015 |
| Deichmann-Shoes UK Limited | Wholesale & retail | 1994 |
| Del-X Express Delivery Ltd | Transport & logistics | 2018 |
| Delight Restaurant Ltd | Hospitality | 2023 |
| Delta Value Limited | Professional & scientific | 2022 |
| Denhams (Holdings) Limited | Other services | 2009 |
| Denhams (Leicester) Limited | Wholesale & retail | 1946 |
| Denhams (Market Harborough) Limited | Wholesale & retail | 2013 |
| Denovo Property Ltd | Real estate | 2023 |
| Denovo Sales Solutions Ltd | Wholesale & retail | 2012 |
| Dentalytics Limited | Information & communication | 2024 |
| Depen Patel Ltd | Health & social care | 2009 |
| Deraub Professional Services Ltd | Information & communication | 2024 |
| Derek Knowles & Associates Limited | Real estate | 1986 |
| Dermura Skin Ltd | Wholesale & retail | 2018 |
| Desert Springs Cricket Ltd | Arts & recreation | 2020 |
| DESIG-N8 Limited | Professional & scientific | 2016 |
| Design Alliance Limited | Professional & scientific | 2016 |
| DESIGN375 Ltd | Professional & scientific | 2019 |
| Designs @ 4A Limited | Construction | 2010 |
| Destiny Health Care Services Limited | Health & social care | 2015 |
| Devine Brickwork Ltd | Construction | 2019 |
| Dexo Technologies Limited | Professional & scientific | 2013 |
| DFP Scenic Ltd | Administrative & support | 2019 |
| DGW Developments Limited | Construction | 2007 |
| Dhaka Dynasty Tandoori Restaurant Limited | Hospitality | 1999 |
| Dhasc Limited | Construction | 2018 |
| Diagnostech Solutions Limited | Professional & scientific | 2018 |