| CTW Electrical Services Limited | Construction | 2022 |
| Cuccina One Ltd | Administrative & support | 2016 |
| Cupapeel Ltd | Manufacturing | 2020 |
| Curve Talent Limited | Administrative & support | 2023 |
| Customs Code Limited | Transport & logistics | 2021 |
| Custos Maris Ltd | Financial services | 2026 |
| Cygnet PCN (East Riding) Limited | Health & social care | 2020 |
| Cyrus Developments Limited | Construction | 2003 |
| D & G Properties (Yorkshire) Ltd | Real estate | 2020 |
| D & P Motor Factors Limited | Wholesale & retail | 2003 |
| D 5MUJ Ltd | Transport & logistics | 2019 |
| D Butcher Limited | Construction | 2020 |
| D G Kular Limited | Wholesale & retail | 2025 |
| D H Welburn Farming Limited | Agriculture & fishing | 2003 |
| D M O Services Ltd | Wholesale & retail | 2017 |
| D W Electrical Engineering Limited | Construction | 2016 |
| D&K Trans Ltd | Transport & logistics | 2023 |
| D&M Holt Properties Ltd | Real estate | 2021 |
| D&M Property Investors Ltd | Real estate | 2023 |
| D. Clough 1985 Ltd | Professional & scientific | 2026 |
| D. M. Cranes Ltd. | Construction | 2016 |
| D.R.M.Direct European Ltd | Transport & logistics | 2008 |
| DA Campbell Limited | Health & social care | 2010 |
| Daisy Taylor (York) Ltd | Wholesale & retail | 2018 |
| Dale Malcolmson TM Ltd | Construction | 2024 |
| Damac Estates Limited | Construction | 2014 |
| Damella Ltd | Financial services | 2026 |
| Danbrit Holdings Limited | Transport & logistics | 1984 |
| Danbrit Logistics Limited | Extraterritorial | 2003 |
| Danbrit Shipping Limited | Transport & logistics | 2006 |
| Dane Mitchell Coaching Ltd | Education | 2025 |
| Daniel John Automotive Ltd | Wholesale & retail | 2020 |
| Danum Home Hardware Limited | Wholesale & retail | 2016 |
| Davbarr Kennels Limited | Agriculture & fishing | 2006 |
| Dave Walsh Ltd | Professional & scientific | 2024 |
| David Fielder Limited | Administrative & support | 2015 |
| David Mcardle Limited | Real estate | 2020 |
| David Sykes (Whitley Bridge) Limited | Construction | 1976 |
| David Sykes Property Limited | Real estate | 2013 |
| David T Wade Student at Law Ltd | Other services | 2013 |
| David T. Wade & Co Properties Ltd | Real estate | 2020 |
| Day First AID Ltd | Education | 2014 |
| DB Packing Holdings Limited | Professional & scientific | 2010 |
| DCE Trading Limited | Water & waste | 2017 |
| DCS Training and Consultancy Ltd | Professional & scientific | 2024 |
| DD & J Construction Ltd | Construction | 2024 |
| Dean Pawson TM Ltd | Construction | 2016 |
| Decoright Contracts UK Limited | Construction | 2009 |
| Defined Variables Ltd | Information & communication | 2025 |
| Deism Ltd | Transport & logistics | 2026 |
| DEL Express Limited | Transport & logistics | 2023 |
| Delara Support Service Ltd | Administrative & support | 2026 |
| Delicar Service Ltd | Wholesale & retail | 2024 |
| Delicious Kebab Ltd | Hospitality | 2025 |
| Delphine's Bridal Ltd | Wholesale & retail | 2026 |
| Delrios Limited | Hospitality | 2008 |
| Delta Blinds (East) Limited | Wholesale & retail | 2007 |
| Denst Transport Ltd | Transport & logistics | 2025 |
| Deol Consultancy Services Ltd. | Professional & scientific | 2007 |
| Devil’S Management Limited | Information & communication | 2025 |
| Dewdown Limited | Administrative & support | 1997 |
| Dexray Ltd | Wholesale & retail | 2023 |
| DH Brickwork & Construction Ltd | Construction | 2026 |
| DH Piping and Engineering Services Ltd | Professional & scientific | 2024 |
| Dhillons Golden Chippy Ltd | Wholesale & retail | 2024 |
| Diamond DETAIL24 Limited | Administrative & support | 2024 |
| Dima Trans Logistics Limited | Transport & logistics | 2015 |
| Direct 4 Workgear Limited | Extraterritorial | 2010 |
| DJ Consultancy Limited | Professional & scientific | 2018 |
| Djhollie's Roofing/Cladding Ltd | Construction | 2020 |
| DK Axiom Ltd | Professional & scientific | 2026 |
| DMH Analysis Ltd | Professional & scientific | 2024 |
| DMI Draincare & Groundworks Ltd | Construction | 2021 |
| DMM Agricultural Contractor Ltd | Wholesale & retail | 2018 |
| Dmrs Holdings Limited | Financial services | 2019 |
| Dmrs Services Limited | Real estate | 2016 |
| DNA Baits Ltd | Manufacturing | 2007 |
| Dobre Polish Shop Ltd | Wholesale & retail | 2024 |
| Dobsonandblakeproperty Limited | Hospitality | 2018 |
| Dodsworth Logistics Ltd | Transport & logistics | 2025 |
| Doncaster Woodlands Ltd | Real estate | 2025 |
| Dongalow Limited | Construction | 2025 |
| Dorothy Rose Limited | Real estate | 1989 |
| Downe Arms Snaith Ltd | Hospitality | 2022 |
| DR Mayoni Consulting Ltd | Professional & scientific | 2026 |
| DR Mayoni Holdings Ltd | Financial services | 2018 |
| DR Mayoni Limited | Health & social care | 2016 |
| DR NPS Consultancy Services Limited | Professional & scientific | 2017 |
| DR Welding & Ducting Ltd | Professional & scientific | 2024 |
| Dragon Delicious Limited | Hospitality | 2024 |
| Draincare East Yorkshire Ltd. | Water & waste | 2021 |
| Drawsign Image Engineering Limited | Administrative & support | 2005 |
| Drive True Brit (Fibres) Limited | Wholesale & retail | 1993 |
| Driven Vehicle Logistics Limited | Transport & logistics | 2019 |
| Driver Haulage Ltd | Transport & logistics | 2018 |
| Drkm Consultants Limited | Professional & scientific | 2014 |
| DSP (Holdings) Limited | Financial services | 2015 |
| DSP Electrical Contractors Limited | Construction | 2006 |
| Dstanleyrd Ltd | Wholesale & retail | 2012 |
| DT & JT Services Ltd | Energy | 2017 |