| Cross-Check Systems Limited | Information & communication | 2010 |
| Cross-Check Validation Systems Limited | Manufacturing | 2019 |
| Crown Fire Installations Ltd | Administrative & support | 2015 |
| Crowther Associates Limited | Professional & scientific | 2006 |
| Crowthers Accountants Limited | Professional & scientific | 2006 |
| CS Kitchens & Bathrooms Ltd | Construction | 2024 |
| Cuddlechestnut Ltd | Administrative & support | 2019 |
| Cumnor Properties Ltd | Real estate | 2022 |
| CUP of INK Ltd | Wholesale & retail | 2025 |
| Cuparex Ltd | Wholesale & retail | 2022 |
| Curriculum Travel Limited | Other services | 2000 |
| Customdawn Ltd | Administrative & support | 2019 |
| CWB Autos Ltd | Wholesale & retail | 2026 |
| CWY Investments Limited | Financial services | 2026 |
| Cybertek Solutions Ltd | Information & communication | 2016 |
| Cyloinne Ltd | Wholesale & retail | 2019 |
| D & J Hospitality Ltd | Hospitality | 2026 |
| D & M Jewellery Finishers Limited | Manufacturing | 2008 |
| Dafsport Racing Limited | Manufacturing | 2025 |
| Danamma Investments Limited | Real estate | 2023 |
| Danamma Medical Limited | Health & social care | 2016 |
| Dancan Limited | Information & communication | 2007 |
| Dandelion Productions Ltd | Arts & recreation | 2025 |
| Danglyknits Ltd | Transport & logistics | 2019 |
| Darren Lusted Property Solutions Ltd | Real estate | 2024 |
| Darwood Management Ltd | Construction | 2012 |
| Dasha Designs Ltd | Wholesale & retail | 2026 |
| Dataflow Measurement Systems Limited | Manufacturing | 1998 |
| David Edward Limited | Professional & scientific | 2025 |
| David Essex Stocktaking Services Limited | Professional & scientific | 2002 |
| Dazzle Creative Limited | Professional & scientific | 2013 |
| DCH Air Conditioning and Electrical Limited | Energy | 2019 |
| Deer Park Weddings & Events Ltd | Hospitality | 2021 |
| Deesdrivein Ltd | Wholesale & retail | 2019 |
| Defender Rear Tubs Limited | Manufacturing | 2021 |
| Demmumric Ltd | Wholesale & retail | 2019 |
| Deorthic Ltd | Wholesale & retail | 2023 |
| Derek Jarman Developments Limited | Real estate | 2024 |
| Derek P Jarman Limited | Wholesale & retail | 2023 |
| Deseris Ltd | Transport & logistics | 2020 |
| Designercrates Ltd | Transport & logistics | 2019 |
| Dgbp Engineering Ltd | Professional & scientific | 2025 |
| Dial Food Consulting Ltd | Hospitality | 2022 |
| Diamond Pressure Washing Ltd | Administrative & support | 2025 |
| Diarizym Ltd | Wholesale & retail | 2023 |
| Diphdazith Ltd | Wholesale & retail | 2023 |
| Discipline Global Mobile Ltd | Arts & recreation | 1998 |
| DJB Electrical Contractors Limited | Construction | 2008 |
| DMS Capital Five Ltd | Financial services | 2024 |
| DMS Capital Four Ltd | Construction | 2024 |
| DMS Capital Ltd | Real estate | 2022 |
| DMS Capital Three Ltd | Real estate | 2022 |
| DMS Capital Two Ltd | Real estate | 2022 |
| DMS Management UK Ltd | Professional & scientific | 2008 |
| DNA Business Consultants Limited | Professional & scientific | 2012 |
| DNA Health Physique and Lifestyle Management Limited | Health & social care | 2017 |
| Doctor Lowry Limited | Professional & scientific | 2008 |
| Docverge Ltd | Administrative & support | 2019 |
| Double-O&Ks Ltd | Professional & scientific | 2022 |
| Dowling Compliance Ltd | Professional & scientific | 2022 |
| Downhurst Engineering Limited | Manufacturing | 1976 |
| Dream Machine Giveaways Ltd | Wholesale & retail | 2025 |
| DRG Contracts Limited | Financial services | 2016 |
| DRG Interior & Building Solutions Ltd | Construction | 2011 |
| DRG Projects Limited | Arts & recreation | 2021 |
| DRG Structures Limited | Construction | 2018 |
| DRG Trading Limited | Wholesale & retail | 2020 |
| Drivetac Limited | Arts & recreation | 2020 |
| Drumswords Ltd | Manufacturing | 2021 |
| DS Investment Property Holdings Limited | Real estate | 2023 |
| Dtfsalesuk Ltd | Wholesale & retail | 2023 |
| Duncan Brown Limited | Construction | 2013 |
| Dunkker Limited | Information & communication | 2016 |
| Duotech Solutions Limited | Professional & scientific | 2014 |
| DY Todd Ltd | Transport & logistics | 2022 |
| E and C Christiansen Limited | Manufacturing | 2014 |
| E C S Lettings Ltd | Real estate | 2024 |
| E O D Contracts Limited | Administrative & support | 2002 |
| E. J. Glanville & Co. (Asset Management) Limited | Administrative & support | 2007 |
| E.G. Eccles Limited | Hospitality | 1977 |
| E.J. Glanville & Co. (Investment Brokers) Limited | Financial services | 1984 |
| E.M.Pv Consulting Ltd | Professional & scientific | 2024 |
| EAT Your Crusts Limited | Manufacturing | 2019 |
| Echelon Cycles Limited | Administrative & support | 2011 |
| Eckington Manor Limited | Hospitality | 2025 |
| Edensbeck Limited | Real estate | 2012 |
| Edensbeck Two Partnership LLP | | 2024 |
| Edfurniture Ltd | Wholesale & retail | 2017 |
| Edisun Ltd | Construction | 2009 |
| Edvocat Limited | Education | 2024 |
| Edward Stephens (Farms) Limited | Agriculture & fishing | 1995 |
| EGY (UK) Limited | Transport & logistics | 2018 |
| EGY Ltd | Professional & scientific | 2020 |
| EGY Properties Ltd | Real estate | 2023 |
| Ekhaya Developments Limited | Construction | 2017 |
| Electrical and Wellness Services Limited | Construction | 2024 |
| Electrical Evolutions Limited | Construction | 2021 |
| Elegant Oak Frames Ltd | Construction | 2024 |
| Elevate the Brand Ltd | Professional & scientific | 2024 |
| Elite Retail Solution Services Ltd | Wholesale & retail | 2025 |